updated LinkTable invalidation

updated the description for refreshing directories
Moved linktable freshness check around
2024-05-11 23:15:32 +01:00 · 2024-05-11 17:28:23 +01:00 · 2024-05-11 01:53:30 +01:00 · 2024-05-07 01:44:01 +01:00 · 2024-05-06 00:47:22 +01:00 · 2024-05-06 00:12:03 +01:00
29 changed files with 14493 additions and 294 deletions
--- a/.deepsource.toml
+++ b/.deepsource.toml
@ -0,0 +1,4 @@
+version = 1
+
+[[analyzers]]
+name = "cxx"
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@ -0,0 +1,91 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  schedule:
+    - cron: '18 19 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    # Runner size impacts CodeQL analysis time. To learn more, please see:
+    #   - https://gh.io/recommended-hardware-resources-for-running-codeql
+    #   - https://gh.io/supported-runners-and-hardware-resources
+    #   - https://gh.io/using-larger-runners
+    # Consider using larger runners for possible analysis time improvements.
+    runs-on: 'ubuntu-latest'
+    timeout-minutes: 360
+    permissions:
+      # required for all workflows
+      security-events: write
+
+      # only required for workflows in private repositories
+      actions: read
+      contents: read
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'c-cpp' ]
+        # CodeQL supports [ 'c-cpp', 'csharp', 'go', 'java-kotlin', 'javascript-typescript', 'python', 'ruby', 'swift' ]
+        # Use only 'java-kotlin' to analyze code written in Java, Kotlin or both
+        # Use only 'javascript-typescript' to analyze code written in JavaScript, TypeScript or both
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install libgumbo-dev libfuse-dev libssl-dev \
+          libcurl4-openssl-dev uuid-dev help2man libexpat1-dev pkg-config \
+          autoconf
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+
+        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        # queries: security-extended,security-and-quality
+
+
+    # Autobuild attempts to build any compiled languages (C/C++, C#, Go, Java, or Swift).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v3
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+    #   If the Autobuild fails above, remove it and uncomment the following three lines.
+    #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+    # - run: |
+    #     echo "Run, Build Application using script"
+    #     ./location_of_script_within_repo/buildscript.sh
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:${{matrix.language}}"
--- a/.gitignore
+++ b/.gitignore
@ -14,5 +14,17 @@ doc/html
 *.c~
 *.h~

+# autotools
+autom4te.cache
+
 #Others
 mnt
+
+# Generated files
+Doxyfile
+Makefile
+config.log
+config.status
+doc
+src/.deps
+src/.dirstamp
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -5,6 +5,25 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

 ## [Unreleased]
+
+### Fixed
+- The refreshed LinkTable is now saved
+(https://github.com/fangfufu/httpdirfs/issues/141).
+- Only one LinkTable of the same directory is created when the cache mode is
+enabled (https://github.com/fangfufu/httpdirfs/issues/140).
+- Cache mode noe works correctly witht escaped URL
+(https://github.com/fangfufu/httpdirfs/issues/138).
+
+## Changed
+- Improved LinkTable caching. LinkTable invalidation is now purely based on
+timeout.
+
+## [1.2.5] - 2023-02-24
+
+### Fixed
+- No longer compile with UBSAN enabled by default to avoid introducing
+security vulnerability.
+
 ## [1.2.4] - 2023-01-11

 ### Added
@ -211,7 +230,8 @@ ${XDG_CONFIG_HOME}/httpdirfs, rather than ${HOME}/.httpdirfs
 ## [1.0] - 2018-08-22
 - Initial release, everything works correctly, as far as I know.

-[Unreleased]: https://github.com/fangfufu/httpdirfs/compare/1.2.4...master
+[Unreleased]: https://github.com/fangfufu/httpdirfs/compare/1.2.5...master
+[1.2.5]: https://github.com/fangfufu/httpdirfs/compare/1.2.4...1.2.5
 [1.2.4]: https://github.com/fangfufu/httpdirfs/compare/1.2.3...1.2.4
 [1.2.3]: https://github.com/fangfufu/httpdirfs/compare/1.2.2...1.2.3
 [1.2.2]: https://github.com/fangfufu/httpdirfs/compare/1.2.1...1.2.2
--- a/Doxyfile.in
+++ b/Doxyfile.in
@ -790,8 +790,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.

-INPUT                  = . \
-                         src
+INPUT                  = @srcdir@ @srcdir@/src

 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
--- a/99
+++ b/99
@ -1,99 +0,0 @@
-VERSION = 1.2.3
-
-CFLAGS += -g -O2  -Wall -Wextra -Wshadow \
-	-fsanitize=undefined -fanalyzer -Wno-analyzer-file-leak \
-	-rdynamic -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -DVERSION=\"$(VERSION)\"\
-	`pkg-config --cflags-only-I gumbo libcurl fuse uuid expat`
-LDFLAGS += `pkg-config --libs-only-L gumbo libcurl fuse uuid expat`
-LIBS = -pthread -lgumbo -lcurl -lfuse -lcrypto -lexpat
-COBJS = main.o network.o fuse_local.o link.o cache.o util.o sonic.o log.o\
-	config.o memcache.o
-
-OS := $(shell uname)
-ifeq ($(OS),Darwin)
-  BREW_PREFIX := $(shell brew --prefix)
-  CFLAGS  +=  -I$(BREW_PREFIX)/opt/openssl/include \
-	-I$(BREW_PREFIX)/opt/curl/include
-  LDFLAGS +=  -L$(BREW_PREFIX)/opt/openssl/lib \
-	-L$(BREW_PREFIX)/opt/curl/lib
-else
-  LIBS    +=  -luuid
-endif
-ifeq ($(OS),FreeBSD)
-  LIBS    +=  -lexecinfo
-endif
-
-prefix ?= /usr/local
-
-all: httpdirfs
-
-%.o: src/%.c
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -c -o $@ $<
-
-httpdirfs: $(COBJS)
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
-
-install:
-ifeq ($(OS),Linux)
-	install -m 755 -D httpdirfs \
-		$(DESTDIR)$(prefix)/bin/httpdirfs
-	install -m 644 -D doc/man/httpdirfs.1 \
-		$(DESTDIR)$(prefix)/share/man/man1/httpdirfs.1
-endif
-ifeq ($(OS),FreeBSD)
-	install -m 755 httpdirfs \
-		$(DESTDIR)$(prefix)/bin/httpdirfs
-	gzip -f -k doc/man/httpdirfs.1
-	install -m 644 doc/man/httpdirfs.1.gz \
-		$(DESTDIR)$(prefix)/man/man1/httpdirfs.1.gz
-endif
-ifeq ($(OS),Darwin)
-	install -d $(DESTDIR)$(prefix)/bin
-	install -m 755 httpdirfs \
-		$(DESTDIR)$(prefix)/bin/httpdirfs
-	install -d $(DESTDIR)$(prefix)/share/man/man1
-	install -m 644 doc/man/httpdirfs.1 \
-		$(DESTDIR)$(prefix)/share/man/man1/httpdirfs.1
-endif
-
-man: httpdirfs
-	mkdir -p doc/man
-	help2man --name "mount HTTP directory as a virtual filesystem" \
-		--no-discard-stderr ./httpdirfs > doc/man/httpdirfs.1
-
-doc:
-	doxygen Doxyfile
-
-format:
-	astyle --style=kr --align-pointer=name --max-code-length=80 src/*.c src/*.h
-
-clean:
-	-rm -f src/*.h~
-	-rm -f src/*.c~
-	-rm -f src/*orig
-	-rm -f *.o
-	-rm -f httpdirfs
-
-distclean: clean
-	-rm -rf doc/html
-	-rm -rf doc/man/httpdirfs.1
-
-uninstall:
-	-rm -f $(DESTDIR)$(prefix)/bin/httpdirfs
-ifeq ($(OS),Linux)
-	-rm -f $(DESTDIR)$(prefix)/share/man/man1/httpdirfs.1
-endif
-ifeq ($(OS),FreeBSD)
-	-rm -f $(DESTDIR)$(prefix)/man/man1/httpdirfs.1.gz
-endif
-ifeq ($(OS),Darwin)
-	-rm -f $(DESTDIR)$(prefix)/share/man/man1/httpdirfs.1
-endif
-
-depend: .depend
-.depend: src/*.c
-	rm -f ./.depend
-	$(CC) $(CFLAGS) -MM $^ -MF ./.depend;
-include .depend
-
-.PHONY: all man doc install clean distclean uninstall depend format
--- a/Makefile.am
+++ b/Makefile.am
@ -0,0 +1,36 @@
+bin_PROGRAMS = httpdirfs
+httpdirfs_SOURCES = src/main.c src/network.c src/fuse_local.c src/link.c \
+	src/cache.c src/util.c src/sonic.c src/log.c src/config.c src/memcache.c
+# This has $(fuse_LIBS) in it because there's a bug in the fuse pkgconf:
+# it should add -pthread to CFLAGS but doesn't.
+# $(NUCLA) is explained in configure.ac.
+CFLAGS = -g -O2  -Wall -Wextra -Wshadow $(NUCLA) \
+	-rdynamic -D_GNU_SOURCE -DVERSION=\"$(VERSION)\"\
+        $(pkgconf_CFLAGS) $(fuse_CFLAGS) $(fuse_LIBS)
+LIBS += $(pkgconf_LIBS) $(fuse_LIBS)
+man_MANS = doc/man/httpdirfs.1
+CLEANFILES = doc/man/*
+DISTCLEANFILES = doc/html/*
+
+# %.o: $(srcdir)/src/%.c
+# 	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -c -o $@ $<
+
+# httpdirfs: $(COBJS)
+# 	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+man: doc/man/httpdirfs.1
+
+doc/man/httpdirfs.1: httpdirfs
+	mkdir -p doc/man
+	rm -f doc/man/httpdirfs.1.tmp
+	help2man --name "mount HTTP directory as a virtual filesystem" \
+		--no-discard-stderr ./httpdirfs > doc/man/httpdirfs.1.tmp
+	mv doc/man/httpdirfs.1.tmp doc/man/httpdirfs.1
+
+doc:
+	doxygen Doxyfile
+
+format:
+	astyle --style=kr --align-pointer=name --max-code-length=80 src/*.c src/*.h
+
+.PHONY: man doc format
--- a/Makefile.in
+++ b/Makefile.in
@ -0,0 +1,934 @@
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+
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+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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+# $(NUCLA) is explained in configure.ac.
+CFLAGS = -g -O2  -Wall -Wextra -Wshadow $(NUCLA) \
+	-rdynamic -D_GNU_SOURCE -DVERSION=\"$(VERSION)\"\
+        $(pkgconf_CFLAGS) $(fuse_CFLAGS) $(fuse_LIBS)
+
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+LTLIBOBJS = @LTLIBOBJS@
+MAKEINFO = @MAKEINFO@
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+NUCLA = @NUCLA@
+OBJEXT = @OBJEXT@
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+docdir = @docdir@
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+fuse_LIBS = @fuse_LIBS@
+host_alias = @host_alias@
+htmldir = @htmldir@
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+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+httpdirfs_SOURCES = src/main.c src/network.c src/fuse_local.c src/link.c \
+	src/cache.c src/util.c src/sonic.c src/log.c src/config.c src/memcache.c
+
+man_MANS = doc/man/httpdirfs.1
+CLEANFILES = doc/man/*
+DISTCLEANFILES = doc/html/*
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+	mkdir $(distdir)/_build $(distdir)/_build/sub $(distdir)/_inst
+	chmod a-w $(distdir)
+	test -d $(distdir)/_build || exit 0; \
+	dc_install_base=`$(am__cd) $(distdir)/_inst && pwd | sed -e 's,^[^:\\/]:[\\/],/,'` \
+	  && dc_destdir="$${TMPDIR-/tmp}/am-dc-$$$$/" \
+	  && am__cwd=`pwd` \
+	  && $(am__cd) $(distdir)/_build/sub \
+	  && ../../configure \
+	    $(AM_DISTCHECK_CONFIGURE_FLAGS) \
+	    $(DISTCHECK_CONFIGURE_FLAGS) \
+	    --srcdir=../.. --prefix="$$dc_install_base" \
+	  && $(MAKE) $(AM_MAKEFLAGS) \
+	  && $(MAKE) $(AM_MAKEFLAGS) $(AM_DISTCHECK_DVI_TARGET) \
+	  && $(MAKE) $(AM_MAKEFLAGS) check \
+	  && $(MAKE) $(AM_MAKEFLAGS) install \
+	  && $(MAKE) $(AM_MAKEFLAGS) installcheck \
+	  && $(MAKE) $(AM_MAKEFLAGS) uninstall \
+	  && $(MAKE) $(AM_MAKEFLAGS) distuninstallcheck_dir="$$dc_install_base" \
+	        distuninstallcheck \
+	  && chmod -R a-w "$$dc_install_base" \
+	  && ({ \
+	       (cd ../.. && umask 077 && mkdir "$$dc_destdir") \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" install \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" uninstall \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" \
+	            distuninstallcheck_dir="$$dc_destdir" distuninstallcheck; \
+	      } || { rm -rf "$$dc_destdir"; exit 1; }) \
+	  && rm -rf "$$dc_destdir" \
+	  && $(MAKE) $(AM_MAKEFLAGS) dist \
+	  && rm -rf $(DIST_ARCHIVES) \
+	  && $(MAKE) $(AM_MAKEFLAGS) distcleancheck \
+	  && cd "$$am__cwd" \
+	  || exit 1
+	$(am__post_remove_distdir)
+	@(echo "$(distdir) archives ready for distribution: "; \
+	  list='$(DIST_ARCHIVES)'; for i in $$list; do echo $$i; done) | \
+	  sed -e 1h -e 1s/./=/g -e 1p -e 1x -e '$$p' -e '$$x'
+distuninstallcheck:
+	@test -n '$(distuninstallcheck_dir)' || { \
+	  echo 'ERROR: trying to run $@ with an empty' \
+	       '$$(distuninstallcheck_dir)' >&2; \
+	  exit 1; \
+	}; \
+	$(am__cd) '$(distuninstallcheck_dir)' || { \
+	  echo 'ERROR: cannot chdir into $(distuninstallcheck_dir)' >&2; \
+	  exit 1; \
+	}; \
+	test `$(am__distuninstallcheck_listfiles) | wc -l` -eq 0 \
+	   || { echo "ERROR: files left after uninstall:" ; \
+	        if test -n "$(DESTDIR)"; then \
+	          echo "  (check DESTDIR support)"; \
+	        fi ; \
+	        $(distuninstallcheck_listfiles) ; \
+	        exit 1; } >&2
+distcleancheck: distclean
+	@if test '$(srcdir)' = . ; then \
+	  echo "ERROR: distcleancheck can only run from a VPATH build" ; \
+	  exit 1 ; \
+	fi
+	@test `$(distcleancheck_listfiles) | wc -l` -eq 0 \
+	  || { echo "ERROR: files left in build directory after distclean:" ; \
+	       $(distcleancheck_listfiles) ; \
+	       exit 1; } >&2
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS) $(MANS)
+installdirs:
+	for dir in "$(DESTDIR)$(bindir)" "$(DESTDIR)$(man1dir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+	-rm -f src/$(DEPDIR)/$(am__dirstamp)
+	-rm -f src/$(am__dirstamp)
+	-test -z "$(DISTCLEANFILES)" || rm -f $(DISTCLEANFILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic mostlyclean-am
+
+distclean: distclean-am
+	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
+		-rm -f src/$(DEPDIR)/cache.Po
+	-rm -f src/$(DEPDIR)/config.Po
+	-rm -f src/$(DEPDIR)/fuse_local.Po
+	-rm -f src/$(DEPDIR)/link.Po
+	-rm -f src/$(DEPDIR)/log.Po
+	-rm -f src/$(DEPDIR)/main.Po
+	-rm -f src/$(DEPDIR)/memcache.Po
+	-rm -f src/$(DEPDIR)/network.Po
+	-rm -f src/$(DEPDIR)/sonic.Po
+	-rm -f src/$(DEPDIR)/util.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-man
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-binPROGRAMS
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man: install-man1
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
+	-rm -rf $(top_srcdir)/autom4te.cache
+		-rm -f src/$(DEPDIR)/cache.Po
+	-rm -f src/$(DEPDIR)/config.Po
+	-rm -f src/$(DEPDIR)/fuse_local.Po
+	-rm -f src/$(DEPDIR)/link.Po
+	-rm -f src/$(DEPDIR)/log.Po
+	-rm -f src/$(DEPDIR)/main.Po
+	-rm -f src/$(DEPDIR)/memcache.Po
+	-rm -f src/$(DEPDIR)/network.Po
+	-rm -f src/$(DEPDIR)/sonic.Po
+	-rm -f src/$(DEPDIR)/util.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS uninstall-man
+
+uninstall-man: uninstall-man1
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles am--refresh check \
+	check-am clean clean-binPROGRAMS clean-cscope clean-generic \
+	cscope cscopelist-am ctags ctags-am dist dist-all dist-bzip2 \
+	dist-gzip dist-lzip dist-shar dist-tarZ dist-xz dist-zip \
+	dist-zstd distcheck distclean distclean-compile \
+	distclean-generic distclean-tags distcleancheck distdir \
+	distuninstallcheck dvi dvi-am html html-am info info-am \
+	install install-am install-binPROGRAMS install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-man1 install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-binPROGRAMS uninstall-man \
+	uninstall-man1
+
+.PRECIOUS: Makefile
+
+
+# %.o: $(srcdir)/src/%.c
+# 	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -c -o $@ $<
+
+# httpdirfs: $(COBJS)
+# 	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+man: doc/man/httpdirfs.1
+
+doc/man/httpdirfs.1: httpdirfs
+	mkdir -p doc/man
+	rm -f doc/man/httpdirfs.1.tmp
+	help2man --name "mount HTTP directory as a virtual filesystem" \
+		--no-discard-stderr ./httpdirfs > doc/man/httpdirfs.1.tmp
+	mv doc/man/httpdirfs.1.tmp doc/man/httpdirfs.1
+
+doc:
+	doxygen Doxyfile
+
+format:
+	astyle --style=kr --align-pointer=name --max-code-length=80 src/*.c src/*.h
+
+.PHONY: man doc format
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
--- a/README.md
+++ b/README.md
@ -1,3 +1,8 @@
+[![CodeQL](https://github.com/fangfufu/httpdirfs/actions/workflows/codeql.yml/badge.svg)](https://github.com/fangfufu/httpdirfs/actions/workflows/codeql.yml)
+[![CodeFactor](https://www.codefactor.io/repository/github/fangfufu/httpdirfs/badge)](https://www.codefactor.io/repository/github/fangfufu/httpdirfs)
+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/30af0a5b4d6f4a4d83ddb68f5193ad23)](https://app.codacy.com/gh/fangfufu/httpdirfs/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=fangfufu_httpdirfs&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=fangfufu_httpdirfs)
+
 # HTTPDirFS - HTTP Directory Filesystem with a permanent cache, and Airsonic / Subsonic server support!

 Have you ever wanted to mount those HTTP directory listings as if it was a
@ -22,9 +27,9 @@ present a HTTP directory listing.

 ## Installation
 Please note if you install HTTDirFS from a repository, it can be outdated.
-### Debian 11 "Bullseye"
-HTTPDirFS is available as a package in Debian 11 "Bullseye", If you are on
-Debian Bullseye, you can simply run the following
+### Debian 12 "Bookworm"
+HTTPDirFS is available as a package in Debian 12 "Bookworm", If you are on
+Debian Bookworm, you can simply run the following
 command as ``root``:

 	apt install httpdirfs
@ -42,49 +47,37 @@ HTTPDirFS is available in the

 ## Compilation
 ### Ubuntu
-Under Ubuntu 18.04.4 LTS, you need the following packages:
+Under Ubuntu 22.04 LTS, you need the following packages:

-    libgumbo-dev libfuse-dev libssl-dev libcurl4-openssl-dev uuid-dev
+    libgumbo-dev libfuse-dev libssl-dev libcurl4-openssl-dev uuid-dev help2man
+    libexpat1-dev pkg-config autoconf

-### Debian 11 "Bullseye" and Debian 10 "Buster"
-Under Debian 10 "Buster" and newer versions, you need the following packages:
+### Debian 12 "Bookworm"
+Under Debian 12 "Bookworm" and newer versions, you need the following packages:

-    libgumbo-dev libfuse-dev libssl-dev libcurl4-openssl-dev uuid-dev
-
-### Debian 9 "Stretch"
-Under Debian 9 "Stretch", you need the following packages:
-
-    libgumbo-dev libfuse-dev libssl1.0-dev libcurl4-openssl-dev
-
-If you get the following warnings during compilation,
-
-    /usr/bin/ld: warning: libcrypto.so.1.0.2, needed by /usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libcurl.so, may conflict with libcrypto.so.1.1
-
-then this program will crash if you connect to HTTPS website. You need to check
-if you have ``libssl1.0-dev`` installed rather than ``libssl-dev``.
-This is you likely have the binaries of OpenSSL 1.0.2 installed alongside with
-the header files for OpenSSL 1.1. The header files for OpenSSL 1.0.2 link in
-additional mutex related callback functions, whereas the header files for
-OpenSSL 1.1 do not.
-
-You can check your SSL engine version using the ``--version`` flag.
+    libgumbo-dev libfuse-dev libssl-dev libcurl4-openssl-dev uuid-dev help2man
+    libexpat1-dev pkg-config autoconf

 ### FreeBSD
 The following dependencies are required from either pkg or ports:

 Packages:

-    gmake fusefs-libs gumbo e2fsprogs-libuuid curl expat
+    gmake fusefs-libs gumbo e2fsprogs-libuuid curl expat pkgconf help2man
+
+If you want to be ableto build the documentation ("gmake doc") you also need
+doxygen (devel/doxygen).

 Ports:

-    devel/gmake sysutils/fusefs-libs devel/gumbo misc/e2fsprogs-libuuid ftp/curl textproc/expat2
+    devel/gmake sysutils/fusefs-libs devel/gumbo misc/e2fsprogs-libuuid ftp/curl textproc/expat2 devel/pkgconf devel/doxygen misc/help2man

 **Note:** If you want brotli compression support, you will need to install curl
 from ports and enable the option.

 You can then build + install with:

+    ./configure
    gmake
    sudo gmake install

@ -92,12 +85,16 @@ Alternatively, you may use the FreeBSD [ports(7)](https://man.freebsd.org/ports/
 infrastructure to build HTTPDirFS from source with the modifications you need.

 ### macOS
-You need to install macFUSE, cURL, gumbo, and OpenSSL from Homebrew:
+You need to install some packages from Homebrew:

-    brew install macfuse curl gumbo-parser openssl pkg-config
+    brew install macfuse curl gumbo-parser openssl pkg-config help2man
+
+If you want to be able to build the documentation ("make doc") you also need
+help2man, doxygen, and graphviz.

 Build and install:

+    ./configure
    make
    sudo make install

@ -139,7 +136,7 @@ HTTPDirFS options:
        --retry-wait        Set delay in seconds before retrying an HTTP request
                            after encountering an error. (default: 5)
        --user-agent        Set user agent string (default: "HTTPDirFS")
-        --no-range-check    Disable the build-in check for the server's support
+        --no-range-check    Disable the built-in check for the server's support
                            for HTTP range requests
        --insecure-tls      Disable licurl TLS certificate verification by
                            setting CURLOPT_SSL_VERIFYHOST to 0
@ -268,7 +265,7 @@ Alternatively, you can specify your own configuration file by using the

 ### Log levels
 You can control how much log HTTPDirFS outputs by setting the
-``HTTPDIRFS_LOG_LEVEL`` enviromental variable. For details of the different
+``HTTPDIRFS_LOG_LEVEL`` environmental variable. For details of the different
 types of log that are supported, please refer to
 [log.h](https://github.com/fangfufu/httpdirfs/blob/master/src/log.h) and
 [log.c](https://github.com/fangfufu/httpdirfs/blob/master/src/log.c).
@ -310,6 +307,8 @@ for the technical and moral support. Your wisdom is much appreciated!
 compatibility patches.
 - I would like to thank [hiliev](https://github.com/hiliev) for providing macOS
 compatibility patches.
+- I would like to thank [Jonathan Kamens](https://github.com/jikamens) for providing
+a whole bunch of code improvements and the improved build system.
 - I would like to thank [-Archivist](https://www.reddit.com/user/-Archivist/)
 for not providing FTP or WebDAV access to his server. This piece of software was
 written in direct response to his appalling behaviour.
--- a/aclocal.m4
+++ b/aclocal.m4
--- a/343
+++ b/343
@ -0,0 +1,343 @@
+#! /bin/sh
+# Wrapper for compilers which do not understand '-c -o'.
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+# Written by Tom Tromey <tromey@cygnus.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+nl='
+'
+
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent tools from complaining about whitespace usage.
+IFS=" ""	$nl"
+
+file_conv=
+
+# func_file_conv build_file lazy
+# Convert a $build file to $host form and store it in $file
+# Currently only supports Windows hosts. If the determined conversion
+# type is listed in (the comma separated) LAZY, no conversion will
+# take place.
+func_file_conv ()
+{
+  file=$1
+  case $file in
+    / | /[!/]*) # absolute file, and not a UNC file
+      if test -z "$file_conv"; then
+	# lazily determine how to convert abs files
+	case `uname -s` in
+	  MINGW*)
+	    file_conv=mingw
+	    ;;
+	  CYGWIN* | MSYS*)
+	    file_conv=cygwin
+	    ;;
+	  *)
+	    file_conv=wine
+	    ;;
+	esac
+      fi
+      case $file_conv/,$2, in
+	*,$file_conv,*)
+	  ;;
+	mingw/*)
+	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
+	  ;;
+	cygwin/* | msys/*)
+	  file=`cygpath -m "$file" || echo "$file"`
+	  ;;
+	wine/*)
+	  file=`winepath -w "$file" || echo "$file"`
+	  ;;
+      esac
+      ;;
+  esac
+}
+
+# func_cl_dashL linkdir
+# Make cl look for libraries in LINKDIR
+func_cl_dashL ()
+{
+  func_file_conv "$1"
+  if test -z "$lib_path"; then
+    lib_path=$file
+  else
+    lib_path="$lib_path;$file"
+  fi
+  linker_opts="$linker_opts -LIBPATH:$file"
+}
+
+# func_cl_dashl library
+# Do a library search-path lookup for cl
+func_cl_dashl ()
+{
+  lib=$1
+  found=no
+  save_IFS=$IFS
+  IFS=';'
+  for dir in $lib_path $LIB
+  do
+    IFS=$save_IFS
+    if $shared && test -f "$dir/$lib.dll.lib"; then
+      found=yes
+      lib=$dir/$lib.dll.lib
+      break
+    fi
+    if test -f "$dir/$lib.lib"; then
+      found=yes
+      lib=$dir/$lib.lib
+      break
+    fi
+    if test -f "$dir/lib$lib.a"; then
+      found=yes
+      lib=$dir/lib$lib.a
+      break
+    fi
+  done
+  IFS=$save_IFS
+
+  if test "$found" != yes; then
+    lib=$lib.lib
+  fi
+}
+
+# func_cl_wrapper cl arg...
+# Adjust compile command to suit cl
+func_cl_wrapper ()
+{
+  # Assume a capable shell
+  lib_path=
+  shared=:
+  linker_opts=
+  for arg
+  do
+    if test -n "$eat"; then
+      eat=
+    else
+      case $1 in
+	-o)
+	  # configure might choose to run compile as 'compile cc -o foo foo.c'.
+	  eat=1
+	  case $2 in
+	    *.o | *.[oO][bB][jJ])
+	      func_file_conv "$2"
+	      set x "$@" -Fo"$file"
+	      shift
+	      ;;
+	    *)
+	      func_file_conv "$2"
+	      set x "$@" -Fe"$file"
+	      shift
+	      ;;
+	  esac
+	  ;;
+	-I)
+	  eat=1
+	  func_file_conv "$2" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-I*)
+	  func_file_conv "${1#-I}" mingw
+	  set x "$@" -I"$file"
+	  shift
+	  ;;
+	-l)
+	  eat=1
+	  func_cl_dashl "$2"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-l*)
+	  func_cl_dashl "${1#-l}"
+	  set x "$@" "$lib"
+	  shift
+	  ;;
+	-L)
+	  eat=1
+	  func_cl_dashL "$2"
+	  ;;
+	-L*)
+	  func_cl_dashL "${1#-L}"
+	  ;;
+	-static)
+	  shared=false
+	  ;;
+	-Wl,*)
+	  arg=${1#-Wl,}
+	  save_ifs="$IFS"; IFS=','
+	  for flag in $arg; do
+	    IFS="$save_ifs"
+	    linker_opts="$linker_opts $flag"
+	  done
+	  IFS="$save_ifs"
+	  ;;
+	-Xlinker)
+	  eat=1
+	  linker_opts="$linker_opts $2"
+	  ;;
+	-*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+	*.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
+	  func_file_conv "$1"
+	  set x "$@" -Tp"$file"
+	  shift
+	  ;;
+	*.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
+	  func_file_conv "$1" mingw
+	  set x "$@" "$file"
+	  shift
+	  ;;
+	*)
+	  set x "$@" "$1"
+	  shift
+	  ;;
+      esac
+    fi
+    shift
+  done
+  if test -n "$linker_opts"; then
+    linker_opts="-link$linker_opts"
+  fi
+  exec "$@" $linker_opts
+  exit 1
+}
+
+eat=
+
+case $1 in
+  '')
+     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: compile [--help] [--version] PROGRAM [ARGS]
+
+Wrapper for compilers which do not understand '-c -o'.
+Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
+arguments, and rename the output as expected.
+
+If you are trying to build a whole package this is not the
+right script to run: please start by reading the file 'INSTALL'.
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "compile $scriptversion"
+    exit $?
+    ;;
+  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe | \
+  icl | *[/\\]icl | icl.exe | *[/\\]icl.exe )
+    func_cl_wrapper "$@"      # Doesn't return...
+    ;;
+esac
+
+ofile=
+cfile=
+
+for arg
+do
+  if test -n "$eat"; then
+    eat=
+  else
+    case $1 in
+      -o)
+	# configure might choose to run compile as 'compile cc -o foo foo.c'.
+	# So we strip '-o arg' only if arg is an object.
+	eat=1
+	case $2 in
+	  *.o | *.obj)
+	    ofile=$2
+	    ;;
+	  *)
+	    set x "$@" -o "$2"
+	    shift
+	    ;;
+	esac
+	;;
+      *.c)
+	cfile=$1
+	set x "$@" "$1"
+	shift
+	;;
+      *)
+	set x "$@" "$1"
+	shift
+	;;
+    esac
+  fi
+  shift
+done
+
+if test -z "$ofile" || test -z "$cfile"; then
+  # If no '-o' option was seen then we might have been invoked from a
+  # pattern rule where we don't need one.  That is ok -- this is a
+  # normal compilation that the losing compiler can handle.  If no
+  # '.c' file was seen then we are probably linking.  That is also
+  # ok.
+  exec "$@"
+fi
+
+# Name of file we expect compiler to create.
+cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
+
+# Create the lock directory.
+# Note: use '[/\\:.-]' here to ensure that we don't use the same name
+# that we are using for the .o file.  Also, base the name on the expected
+# object file name, since that is what matters with a parallel build.
+lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
+while true; do
+  if mkdir "$lockdir" >/dev/null 2>&1; then
+    break
+  fi
+  sleep 1
+done
+# FIXME: race condition here if user kills between mkdir and trap.
+trap "rmdir '$lockdir'; exit 1" 1 2 15
+
+# Run the compile.
+"$@"
+ret=$?
+
+if test -f "$cofile"; then
+  test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
+elif test -f "${cofile}bj"; then
+  test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
+fi
+
+rmdir "$lockdir"
+exit $ret
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# End:
--- a/config.guess
+++ b/config.guess
--- a/config.sub
+++ b/config.sub
--- a/5952
+++ b/5952
--- a/configure.ac
+++ b/configure.ac
@ -0,0 +1,14 @@
+AC_INIT([httpdirfs],[1.2.5])
+AC_CANONICAL_BUILD
+AC_CONFIG_FILES([Makefile Doxyfile])
+AC_PROG_CC
+AC_SEARCH_LIBS([backtrace],[execinfo])
+
+# Because we use $(fuse_LIBS) in $(CFLAGS); see comment in Makefile.in
+AX_CHECK_COMPILE_FLAG([-Wunused-command-line-argument],[NUCLA=-Wno-unused-command-line-argument],[-Werror])
+AC_SUBST([NUCLA])
+AM_INIT_AUTOMAKE([foreign subdir-objects])
+PKG_CHECK_MODULES([pkgconf],[gumbo libcurl uuid expat openssl])
+# This is separate because we need to be able to use $(fuse_LIBS) in CFLAGS
+PKG_CHECK_MODULES([fuse],[fuse])
+AC_OUTPUT
--- a/786
+++ b/786
@ -0,0 +1,786 @@
+#! /bin/sh
+# depcomp - compile a program generating dependencies as side-effects
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
+
+case $1 in
+  '')
+    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+    exit 1;
+    ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by 'PROGRAMS ARGS'.
+  object      Object file output by 'PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputting dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
+# Get the directory component of the given path, and save it in the
+# global variables '$dir'.  Note that this directory component will
+# be either empty or ending with a '/' character.  This is deliberate.
+set_dir_from ()
+{
+  case $1 in
+    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
+      *) dir=;;
+  esac
+}
+
+# Get the suffix-stripped basename of the given path, and save it the
+# global variable '$base'.
+set_base_from ()
+{
+  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
+}
+
+# If no dependency file was actually created by the compiler invocation,
+# we still have to create a dummy depfile, to avoid errors with the
+# Makefile "include basename.Plo" scheme.
+make_dummy_depfile ()
+{
+  echo "#dummy" > "$depfile"
+}
+
+# Factor out some common post-processing of the generated depfile.
+# Requires the auxiliary global variable '$tmpdepfile' to be set.
+aix_post_process_depfile ()
+{
+  # If the compiler actually managed to produce a dependency file,
+  # post-process it.
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form 'foo.o: dependency.h'.
+    # Do two passes, one to just change these to
+    #   $object: dependency.h
+    # and one to simply output
+    #   dependency.h:
+    # which is needed to avoid the deleted-header problem.
+    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
+      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
+    } > "$depfile"
+    rm -f "$tmpdepfile"
+  else
+    make_dummy_depfile
+  fi
+}
+
+# A tabulation character.
+tab='	'
+# A newline character.
+nl='
+'
+# Character ranges might be problematic outside the C locale.
+# These definitions help.
+upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
+lower=abcdefghijklmnopqrstuvwxyz
+digits=0123456789
+alpha=${upper}${lower}
+
+if test -z "$depmode" || test -z "$source" || test -z "$object"; then
+  echo "depcomp: Variables source, object and depmode must be set" 1>&2
+  exit 1
+fi
+
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
+tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
+
+rm -f "$tmpdepfile"
+
+# Avoid interferences from the environment.
+gccflag= dashmflag=
+
+# Some modes work just like other modes, but use different flags.  We
+# parameterize here, but still list the modes in the big case below,
+# to make depend.m4 easier to write.  Note that we *cannot* use a case
+# here, because this file can only contain one case statement.
+if test "$depmode" = hp; then
+  # HP compiler uses -M and no extra arg.
+  gccflag=-M
+  depmode=gcc
+fi
+
+if test "$depmode" = dashXmstdout; then
+  # This is just like dashmstdout with a different argument.
+  dashmflag=-xM
+  depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+  # This is just like msvisualcpp but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvisualcpp
+fi
+
+if test "$depmode" = msvc7msys; then
+  # This is just like msvc7 but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvc7
+fi
+
+if test "$depmode" = xlc; then
+  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
+  gccflag=-qmakedep=gcc,-MF
+  depmode=gcc
+fi
+
+case "$depmode" in
+gcc3)
+## gcc 3 implements dependency tracking that does exactly what
+## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
+## it if -MD -MP comes after the -MF stuff.  Hmm.
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  mv "$tmpdepfile" "$depfile"
+  ;;
+
+gcc)
+## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
+## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
+## (see the conditional assignment to $gccflag above).
+## There are various ways to get dependency output from gcc.  Here's
+## why we pick this rather obscure method:
+## - Don't want to use -MD because we'd like the dependencies to end
+##   up in a subdir.  Having to rename by hand is ugly.
+##   (We might end up doing this anyway to support other compilers.)
+## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
+##   -MM, not -M (despite what the docs say).  Also, it might not be
+##   supported by the other compilers which use the 'gcc' depmode.
+## - Using -M directly means running the compiler twice (even worse
+##   than renaming).
+  if test -z "$gccflag"; then
+    gccflag=-MD,
+  fi
+  "$@" -Wp,"$gccflag$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The second -e expression handles DOS-style file names with drive
+  # letters.
+  sed -e 's/^[^:]*: / /' \
+      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
+## This next piece of magic avoids the "deleted header file" problem.
+## The problem is that when a header file which appears in a .P file
+## is deleted, the dependency causes make to die (because there is
+## typically no way to rebuild the header).  We avoid this by adding
+## dummy dependencies for each header file.  Too bad gcc doesn't do
+## this for us directly.
+## Some versions of gcc put a space before the ':'.  On the theory
+## that the space means something, we add a space to the output as
+## well.  hp depmode also adds that space, but also prefixes the VPATH
+## to the object.  Take care to not repeat it in the output.
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+sgi)
+  if test "$libtool" = yes; then
+    "$@" "-Wp,-MDupdate,$tmpdepfile"
+  else
+    "$@" -MDupdate "$tmpdepfile"
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+
+  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
+    echo "$object : \\" > "$depfile"
+    # Clip off the initial element (the dependent).  Don't try to be
+    # clever and replace this with sed code, as IRIX sed won't handle
+    # lines with more than a fixed number of characters (4096 in
+    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
+    # the IRIX cc adds comments like '#:fec' to the end of the
+    # dependency line.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
+      | tr "$nl" ' ' >> "$depfile"
+    echo >> "$depfile"
+    # The second pass generates a dummy entry for each header file.
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+      >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+xlc)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+aix)
+  # The C for AIX Compiler uses -M and outputs the dependencies
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts '$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  set_dir_from "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
+    "$@" -Wc,-M
+  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
+    "$@" -M
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  aix_post_process_depfile
+  ;;
+
+tcc)
+  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
+  # FIXME: That version still under development at the moment of writing.
+  #        Make that this statement remains true also for stable, released
+  #        versions.
+  # It will wrap lines (doesn't matter whether long or short) with a
+  # trailing '\', as in:
+  #
+  #   foo.o : \
+  #    foo.c \
+  #    foo.h \
+  #
+  # It will put a trailing '\' even on the last line, and will use leading
+  # spaces rather than leading tabs (at least since its commit 0394caf7
+  # "Emit spaces for -MD").
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
+  # We have to change lines of the first kind to '$object: \'.
+  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
+  # And for each line of the second kind, we have to emit a 'dep.h:'
+  # dummy dependency, to avoid the deleted-header problem.
+  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+## The order of this option in the case statement is important, since the
+## shell code in configure will try each of these formats in the order
+## listed in this file.  A plain '-MD' option would be understood by many
+## compilers, so we must ensure this comes after the gcc and icc options.
+pgcc)
+  # Portland's C compiler understands '-MD'.
+  # Will always output deps to 'file.d' where file is the root name of the
+  # source file under compilation, even if file resides in a subdirectory.
+  # The object file name does not affect the name of the '.d' file.
+  # pgcc 10.2 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using '\' :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+  set_dir_from "$object"
+  # Use the source, not the object, to determine the base name, since
+  # that's sadly what pgcc will do too.
+  set_base_from "$source"
+  tmpdepfile=$base.d
+
+  # For projects that build the same source file twice into different object
+  # files, the pgcc approach of using the *source* file root name can cause
+  # problems in parallel builds.  Use a locking strategy to avoid stomping on
+  # the same $tmpdepfile.
+  lockdir=$base.d-lock
+  trap "
+    echo '$0: caught signal, cleaning up...' >&2
+    rmdir '$lockdir'
+    exit 1
+  " 1 2 13 15
+  numtries=100
+  i=$numtries
+  while test $i -gt 0; do
+    # mkdir is a portable test-and-set.
+    if mkdir "$lockdir" 2>/dev/null; then
+      # This process acquired the lock.
+      "$@" -MD
+      stat=$?
+      # Release the lock.
+      rmdir "$lockdir"
+      break
+    else
+      # If the lock is being held by a different process, wait
+      # until the winning process is done or we timeout.
+      while test -d "$lockdir" && test $i -gt 0; do
+        sleep 1
+        i=`expr $i - 1`
+      done
+    fi
+    i=`expr $i - 1`
+  done
+  trap - 1 2 13 15
+  if test $i -le 0; then
+    echo "$0: failed to acquire lock after $numtries attempts" >&2
+    echo "$0: check lockdir '$lockdir'" >&2
+    exit 1
+  fi
+
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  set_dir_from  "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add 'dependent.h:' lines.
+    sed -ne '2,${
+               s/^ *//
+               s/ \\*$//
+               s/$/:/
+               p
+             }' "$tmpdepfile" >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
+tru64)
+  # The Tru64 compiler uses -MD to generate dependencies as a side
+  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
+  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+  # dependencies in 'foo.d' instead, so we check for that too.
+  # Subdirectories are respected.
+  set_dir_from  "$object"
+  set_base_from "$object"
+
+  if test "$libtool" = yes; then
+    # Libtool generates 2 separate objects for the 2 libraries.  These
+    # two compilations output dependencies in $dir.libs/$base.o.d and
+    # in $dir$base.o.d.  We have to check for both files, because
+    # one of the two compilations can be disabled.  We should prefer
+    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+    # automatically cleaned when .libs/ is deleted, while ignoring
+    # the former would cause a distcleancheck panic.
+    tmpdepfile1=$dir$base.o.d          # libtool 1.5
+    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
+    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
+    "$@" -Wc,-MD
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    tmpdepfile3=$dir$base.d
+    "$@" -MD
+  fi
+
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  # Same post-processing that is required for AIX mode.
+  aix_post_process_depfile
+  ;;
+
+msvc7)
+  if test "$libtool" = yes; then
+    showIncludes=-Wc,-showIncludes
+  else
+    showIncludes=-showIncludes
+  fi
+  "$@" $showIncludes > "$tmpdepfile"
+  stat=$?
+  grep -v '^Note: including file: ' "$tmpdepfile"
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The first sed program below extracts the file names and escapes
+  # backslashes for cygpath.  The second sed program outputs the file
+  # name when reading, but also accumulates all include files in the
+  # hold buffer in order to output them again at the end.  This only
+  # works with sed implementations that can handle large buffers.
+  sed < "$tmpdepfile" -n '
+/^Note: including file:  *\(.*\)/ {
+  s//\1/
+  s/\\/\\\\/g
+  p
+}' | $cygpath_u | sort -u | sed -n '
+s/ /\\ /g
+s/\(.*\)/'"$tab"'\1 \\/p
+s/.\(.*\) \\/\1:/
+H
+$ {
+  s/.*/'"$tab"'/
+  G
+  p
+}' >> "$depfile"
+  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
+  rm -f "$tmpdepfile"
+  ;;
+
+msvc7msys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+#nosideeffect)
+  # This comment above is used by automake to tell side-effect
+  # dependency tracking mechanisms from slower ones.
+
+dashmstdout)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout, regardless of -o.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  test -z "$dashmflag" && dashmflag=-M
+  # Require at least two characters before searching for ':'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
+  "$@" $dashmflag |
+    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this sed invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+dashXmstdout)
+  # This case only exists to satisfy depend.m4.  It is never actually
+  # run, as this mode is specially recognized in the preamble.
+  exit 1
+  ;;
+
+makedepend)
+  "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+  # X makedepend
+  shift
+  cleared=no eat=no
+  for arg
+  do
+    case $cleared in
+    no)
+      set ""; shift
+      cleared=yes ;;
+    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
+    case "$arg" in
+    -D*|-I*)
+      set fnord "$@" "$arg"; shift ;;
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
+    -*|$object)
+      ;;
+    *)
+      set fnord "$@" "$arg"; shift ;;
+    esac
+  done
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
+  touch "$tmpdepfile"
+  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
+  rm -f "$depfile"
+  # makedepend may prepend the VPATH from the source file name to the object.
+  # No need to regex-escape $object, excess matching of '.' is harmless.
+  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process the last invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed '1,2d' "$tmpdepfile" \
+    | tr ' ' "$nl" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile" "$tmpdepfile".bak
+  ;;
+
+cpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove '-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  "$@" -E \
+    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+    | sed '$ s: \\$::' > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  cat < "$tmpdepfile" >> "$depfile"
+  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvisualcpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  IFS=" "
+  for arg
+  do
+    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
+        set fnord "$@"
+        shift
+        shift
+        ;;
+    *)
+        set fnord "$@" "$arg"
+        shift
+        shift
+        ;;
+    esac
+  done
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
+  echo "$tab" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+none)
+  exec "$@"
+  ;;
+
+*)
+  echo "Unknown depmode $depmode" 1>&2
+  exit 1
+  ;;
+esac
+
+exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# End:
--- a/533
+++ b/533
@ -0,0 +1,533 @@
+#!/bin/sh
+# install - install a program, script, or datafile
+
+scriptversion=2020-11-14.01; # UTC
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
+#
+# Copyright (C) 1994 X Consortium
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# 'make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+
+tab='	'
+nl='
+'
+IFS=" $tab$nl"
+
+# Set DOITPROG to "echo" to test this script.
+
+doit=${DOITPROG-}
+doit_exec=${doit:-exec}
+
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
+
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+# Create dirs (including intermediate dirs) using mode 755.
+# This is like GNU 'install' as of coreutils 8.32 (2020).
+mkdir_umask=22
+
+backupsuffix=
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
+rmcmd="$rmprog -f"
+stripcmd=
+
+src=
+dst=
+dir_arg=
+dst_arg=
+
+copy_on_change=false
+is_target_a_directory=possibly
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
+
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
+
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -p            pass -p to $cpprog.
+  -s            $stripprog installed files.
+  -S SUFFIX     attempt to back up existing files, with suffix SUFFIX.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
+
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+
+By default, rm is invoked with -f; when overridden with RMPROG,
+it's up to you to specify -f if you want it.
+
+If -S is not specified, no backups are attempted.
+
+Email bug reports to bug-automake@gnu.org.
+Automake home page: https://www.gnu.org/software/automake/
+"
+
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
+
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+        shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+        case $mode in
+          *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
+            echo "$0: invalid mode: $mode" >&2
+            exit 1;;
+        esac
+        shift;;
+
+    -o) chowncmd="$chownprog $2"
+        shift;;
+
+    -p) cpprog="$cpprog -p";;
+
+    -s) stripcmd=$stripprog;;
+
+    -S) backupsuffix="$2"
+        shift;;
+
+    -t)
+        is_target_a_directory=always
+        dst_arg=$2
+        # Protect names problematic for 'test' and other utilities.
+        case $dst_arg in
+          -* | [=\(\)!]) dst_arg=./$dst_arg;;
+        esac
+        shift;;
+
+    -T) is_target_a_directory=never;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --) shift
+        break;;
+
+    -*) echo "$0: invalid option: $1" >&2
+        exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+# We allow the use of options -d and -T together, by making -d
+# take the precedence; this is for compatibility with GNU install.
+
+if test -n "$dir_arg"; then
+  if test -n "$dst_arg"; then
+    echo "$0: target directory not allowed when installing a directory." >&2
+    exit 1
+  fi
+fi
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+    # Protect names problematic for 'test' and other utilities.
+    case $dst_arg in
+      -* | [=\(\)!]) dst_arg=./$dst_arg;;
+    esac
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call 'install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  if test $# -gt 1 || test "$is_target_a_directory" = always; then
+    if test ! -d "$dst_arg"; then
+      echo "$0: $dst_arg: Is not a directory." >&2
+      exit 1
+    fi
+  fi
+fi
+
+if test -z "$dir_arg"; then
+  do_exit='(exit $ret); exit $ret'
+  trap "ret=129; $do_exit" 1
+  trap "ret=130; $do_exit" 2
+  trap "ret=141; $do_exit" 13
+  trap "ret=143; $do_exit" 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names problematic for 'test' and other utilities.
+  case $src in
+    -* | [=\(\)!]) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+    # Don't chown directories that already exist.
+    if test $dstdir_status = 0; then
+      chowncmd=""
+    fi
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+    dst=$dst_arg
+
+    # If destination is a directory, append the input filename.
+    if test -d "$dst"; then
+      if test "$is_target_a_directory" = never; then
+        echo "$0: $dst_arg: Is a directory" >&2
+        exit 1
+      fi
+      dstdir=$dst
+      dstbase=`basename "$src"`
+      case $dst in
+	*/) dst=$dst$dstbase;;
+	*)  dst=$dst/$dstbase;;
+      esac
+      dstdir_status=0
+    else
+      dstdir=`dirname "$dst"`
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
+
+  case $dstdir in
+    */) dstdirslash=$dstdir;;
+    *)  dstdirslash=$dstdir/;;
+  esac
+
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+        # With -d, create the new directory with the user-specified mode.
+        # Otherwise, rely on $mkdir_umask.
+        if test -n "$dir_arg"; then
+          mkdir_mode=-m$mode
+        else
+          mkdir_mode=
+        fi
+
+        posix_mkdir=false
+	# The $RANDOM variable is not portable (e.g., dash).  Use it
+	# here however when possible just to lower collision chance.
+	tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+
+	trap '
+	  ret=$?
+	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null
+	  exit $ret
+	' 0
+
+	# Because "mkdir -p" follows existing symlinks and we likely work
+	# directly in world-writeable /tmp, make sure that the '$tmpdir'
+	# directory is successfully created first before we actually test
+	# 'mkdir -p'.
+	if (umask $mkdir_umask &&
+	    $mkdirprog $mkdir_mode "$tmpdir" &&
+	    exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
+	then
+	  if test -z "$dir_arg" || {
+	       # Check for POSIX incompatibilities with -m.
+	       # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+	       # other-writable bit of parent directory when it shouldn't.
+	       # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+	       test_tmpdir="$tmpdir/a"
+	       ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
+	       case $ls_ld_tmpdir in
+		 d????-?r-*) different_mode=700;;
+		 d????-?--*) different_mode=755;;
+		 *) false;;
+	       esac &&
+	       $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
+		 ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
+		 test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+	       }
+	     }
+	  then posix_mkdir=:
+	  fi
+	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
+	else
+	  # Remove any dirs left behind by ancient mkdir implementations.
+	  rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
+	fi
+	trap '' 0;;
+    esac
+
+    if
+      $posix_mkdir && (
+        umask $mkdir_umask &&
+        $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+        /*) prefix='/';;
+        [-=\(\)!]*) prefix='./';;
+        *)  prefix='';;
+      esac
+
+      oIFS=$IFS
+      IFS=/
+      set -f
+      set fnord $dstdir
+      shift
+      set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+        test X"$d" = X && continue
+
+        prefix=$prefix$d
+        if test -d "$prefix"; then
+          prefixes=
+        else
+          if $posix_mkdir; then
+            (umask $mkdir_umask &&
+             $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+            # Don't fail if two instances are running concurrently.
+            test -d "$prefix" || exit 1
+          else
+            case $prefix in
+              *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+              *) qprefix=$prefix;;
+            esac
+            prefixes="$prefixes '$qprefix'"
+          fi
+        fi
+        prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+        # Don't fail if two instances are running concurrently.
+        (umask $mkdir_umask &&
+         eval "\$doit_exec \$mkdirprog $prefixes") ||
+          test -d "$dstdir" || exit 1
+        obsolete_mkdir_used=true
+      fi
+    fi
+  fi
+
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
+
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=${dstdirslash}_inst.$$_
+    rmtmp=${dstdirslash}_rm.$$_
+
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
+
+    # Copy the file name to the temp name.
+    (umask $cp_umask &&
+     { test -z "$stripcmd" || {
+	 # Create $dsttmp read-write so that cp doesn't create it read-only,
+	 # which would cause strip to fail.
+	 if test -z "$doit"; then
+	   : >"$dsttmp" # No need to fork-exec 'touch'.
+	 else
+	   $doit touch "$dsttmp"
+	 fi
+       }
+     } &&
+     $doit_exec $cpprog "$src" "$dsttmp") &&
+
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
+       set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       set +f &&
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # If $backupsuffix is set, and the file being installed
+      # already exists, attempt a backup.  Don't worry if it fails,
+      # e.g., if mv doesn't support -f.
+      if test -n "$backupsuffix" && test -f "$dst"; then
+        $doit $mvcmd -f "$dst" "$dst$backupsuffix" 2>/dev/null
+      fi
+
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
+
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+        # Now remove or move aside any old file at destination location.
+        # We try this two ways since rm can't unlink itself on some
+        # systems and the destination file might be busy for other
+        # reasons.  In this case, the final cleanup might fail but the new
+        # file should still install successfully.
+        {
+          test ! -f "$dst" ||
+          $doit $rmcmd "$dst" 2>/dev/null ||
+          { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+            { $doit $rmcmd "$rmtmp" 2>/dev/null; :; }
+          } ||
+          { echo "$0: cannot unlink or rename $dst" >&2
+            (exit 1); exit 1
+          }
+        } &&
+
+        # Now rename the file to the real destination.
+        $doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
+done
--- a/207
+++ b/207
@ -0,0 +1,207 @@
+#! /bin/sh
+# Common wrapper for a few potentially missing GNU programs.
+
+scriptversion=2018-03-07.03; # UTC
+
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
+# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+if test $# -eq 0; then
+  echo 1>&2 "Try '$0 --help' for more information"
+  exit 1
+fi
+
+case $1 in
+
+  --is-lightweight)
+    # Used by our autoconf macros to check whether the available missing
+    # script is modern enough.
+    exit 0
+    ;;
+
+  --run)
+    # Back-compat with the calling convention used by older automake.
+    shift
+    ;;
+
+  -h|--h|--he|--hel|--help)
+    echo "\
+$0 [OPTION]... PROGRAM [ARGUMENT]...
+
+Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
+to PROGRAM being missing or too old.
+
+Options:
+  -h, --help      display this help and exit
+  -v, --version   output version information and exit
+
+Supported PROGRAM values:
+  aclocal   autoconf  autoheader   autom4te  automake  makeinfo
+  bison     yacc      flex         lex       help2man
+
+Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
+'g' are ignored when checking the name.
+
+Send bug reports to <bug-automake@gnu.org>."
+    exit $?
+    ;;
+
+  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
+    echo "missing $scriptversion (GNU Automake)"
+    exit $?
+    ;;
+
+  -*)
+    echo 1>&2 "$0: unknown '$1' option"
+    echo 1>&2 "Try '$0 --help' for more information"
+    exit 1
+    ;;
+
+esac
+
+# Run the given program, remember its exit status.
+"$@"; st=$?
+
+# If it succeeded, we are done.
+test $st -eq 0 && exit 0
+
+# Also exit now if we it failed (or wasn't found), and '--version' was
+# passed; such an option is passed most likely to detect whether the
+# program is present and works.
+case $2 in --version|--help) exit $st;; esac
+
+# Exit code 63 means version mismatch.  This often happens when the user
+# tries to use an ancient version of a tool on a file that requires a
+# minimum version.
+if test $st -eq 63; then
+  msg="probably too old"
+elif test $st -eq 127; then
+  # Program was missing.
+  msg="missing on your system"
+else
+  # Program was found and executed, but failed.  Give up.
+  exit $st
+fi
+
+perl_URL=https://www.perl.org/
+flex_URL=https://github.com/westes/flex
+gnu_software_URL=https://www.gnu.org/software
+
+program_details ()
+{
+  case $1 in
+    aclocal|automake)
+      echo "The '$1' program is part of the GNU Automake package:"
+      echo "<$gnu_software_URL/automake>"
+      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/autoconf>"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+    autoconf|autom4te|autoheader)
+      echo "The '$1' program is part of the GNU Autoconf package:"
+      echo "<$gnu_software_URL/autoconf/>"
+      echo "It also requires GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+  esac
+}
+
+give_advice ()
+{
+  # Normalize program name to check for.
+  normalized_program=`echo "$1" | sed '
+    s/^gnu-//; t
+    s/^gnu//; t
+    s/^g//; t'`
+
+  printf '%s\n' "'$1' is $msg."
+
+  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
+  case $normalized_program in
+    autoconf*)
+      echo "You should only need it if you modified 'configure.ac',"
+      echo "or m4 files included by it."
+      program_details 'autoconf'
+      ;;
+    autoheader*)
+      echo "You should only need it if you modified 'acconfig.h' or"
+      echo "$configure_deps."
+      program_details 'autoheader'
+      ;;
+    automake*)
+      echo "You should only need it if you modified 'Makefile.am' or"
+      echo "$configure_deps."
+      program_details 'automake'
+      ;;
+    aclocal*)
+      echo "You should only need it if you modified 'acinclude.m4' or"
+      echo "$configure_deps."
+      program_details 'aclocal'
+      ;;
+   autom4te*)
+      echo "You might have modified some maintainer files that require"
+      echo "the 'autom4te' program to be rebuilt."
+      program_details 'autom4te'
+      ;;
+    bison*|yacc*)
+      echo "You should only need it if you modified a '.y' file."
+      echo "You may want to install the GNU Bison package:"
+      echo "<$gnu_software_URL/bison/>"
+      ;;
+    lex*|flex*)
+      echo "You should only need it if you modified a '.l' file."
+      echo "You may want to install the Fast Lexical Analyzer package:"
+      echo "<$flex_URL>"
+      ;;
+    help2man*)
+      echo "You should only need it if you modified a dependency" \
+           "of a man page."
+      echo "You may want to install the GNU Help2man package:"
+      echo "<$gnu_software_URL/help2man/>"
+    ;;
+    makeinfo*)
+      echo "You should only need it if you modified a '.texi' file, or"
+      echo "any other file indirectly affecting the aspect of the manual."
+      echo "You might want to install the Texinfo package:"
+      echo "<$gnu_software_URL/texinfo/>"
+      echo "The spurious makeinfo call might also be the consequence of"
+      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
+      echo "want to install GNU make:"
+      echo "<$gnu_software_URL/make/>"
+      ;;
+    *)
+      echo "You might have modified some files without having the proper"
+      echo "tools for further handling them.  Check the 'README' file, it"
+      echo "often tells you about the needed prerequisites for installing"
+      echo "this package.  You may also peek at any GNU archive site, in"
+      echo "case some other package contains this missing '$1' program."
+      ;;
+  esac
+}
+
+give_advice "$1" | sed -e '1s/^/WARNING: /' \
+                       -e '2,$s/^/         /' >&2
+
+# Propagate the correct exit status (expected to be 127 for a program
+# not found, 63 for a program that failed due to version mismatch).
+exit $st
--- a/src/cache.c
+++ b/src/cache.c
@ -163,16 +163,12 @@ static int Meta_read(Cache *cf)
        return EIO;
    }

-    fread(&cf->time, sizeof(long), 1, fp);
-    fread(&cf->content_length, sizeof(off_t), 1, fp);
-    fread(&cf->blksz, sizeof(int), 1, fp);
-    fread(&cf->segbc, sizeof(long), 1, fp);
-
-    /*
-     * Error checking for fread
-     */
-    if (ferror(fp)) {
-        lprintf(error, "error reading core metadata!\n");
+    if (    1 != fread(&cf->time, sizeof(long), 1, fp) ||
+            1 != fread(&cf->content_length, sizeof(off_t), 1, fp) ||
+            1 != fread(&cf->blksz, sizeof(int), 1, fp) ||
+            1 != fread(&cf->segbc, sizeof(long), 1, fp) ||
+            ferror(fp) ) {
+        lprintf(error, "error reading core metadata %s!\n", cf->path);
        return EIO;
    }

@ -545,7 +541,9 @@ static void Cache_free(Cache *cf)
 static int Cache_exist(const char *fn)
 {
    char *metafn = path_append(META_DIR, fn);
+    lprintf(debug, "metafn: %s\n", metafn);
    char *datafn = path_append(DATA_DIR, fn);
+    lprintf(debug, "datafn: %s\n", datafn);
    /*
     * access() returns 0 on success
     */
@ -553,15 +551,17 @@ static int Cache_exist(const char *fn)
    int no_data = access(datafn, F_OK);

    if (no_meta ^ no_data) {
+        lprintf(warning, "Cache file partially missing.\n");
        if (no_meta) {
-            lprintf(warning, "Cache file partially missing.\n");
+            lprintf(debug, "Unlinking datafn: %s\n", datafn);
            if (unlink(datafn)) {
-                lprintf(error, "unlink(): %s\n", strerror(errno));
+                lprintf(fatal, "unlink(): %s\n", strerror(errno));
            }
        }
        if (no_data) {
+            lprintf(debug, "Unlinking metafn: %s\n", metafn);
            if (unlink(metafn)) {
-                lprintf(error, "unlink(): %s\n", strerror(errno));
+                lprintf(fatal, "unlink(): %s\n", strerror(errno));
            }
        }
    }
@ -670,6 +670,7 @@ int Cache_create(const char *path)
    Link *this_link = path_to_Link(path);

    char *fn = "__UNINITIALISED__";
+
    if (CONFIG.mode == NORMAL) {
        fn = curl_easy_unescape(NULL,
                                this_link->f_url + ROOT_LINK_OFFSET, 0,
@ -714,8 +715,14 @@ int Cache_create(const char *path)

    int res = Cache_exist(fn);

+    if (res) {
+        lprintf(fatal, "Cache file creation failed for %s\n", path);
+    }
+
    if (CONFIG.mode == NORMAL) {
        curl_free(fn);
+    } else if (CONFIG.mode == SONIC) {
+        curl_free(fn);
    }

    return res;
@ -949,7 +956,7 @@ static void *Cache_bgdl(void *arg)
                              cf->next_dl_offset);
    if (recv < 0) {
        lprintf(error, "thread %x received %ld bytes, \
-which does't make sense\n", pthread_self(), recv);
+which doesn't make sense\n", pthread_self(), recv);
    }

    if ((recv == cf->blksz) ||
@ -1030,7 +1037,7 @@ Cache_read(Cache *cf, char *const output_buf, const off_t len,
                              dl_offset);
    if (recv < 0) {
        lprintf(error, "thread %x received %ld bytes, \
-which does't make sense\n", pthread_self(), recv);
+which doesn't make sense\n", pthread_self(), recv);
    }
    /*
     * check if we have received enough data, write it to the disk
--- a/src/config.c
+++ b/src/config.c
@ -53,6 +53,8 @@ void Config_init(void)

    CONFIG.insecure_tls = 0;

+    CONFIG.refresh_timeout = DEFAULT_REFRESH_TIMEOUT;
+
    /*--------------- Cache related ---------------*/
    CONFIG.cache_enabled = 0;

--- a/src/config.h
+++ b/src/config.h
@ -23,6 +23,11 @@
 */
 #define DEFAULT_NETWORK_MAX_CONNS   10

+/**
+ * \brief The default refresh_timeout
+ */
+#define DEFAULT_REFRESH_TIMEOUT  3600
+
 /**
 * \brief Operation modes
 */
@ -67,6 +72,8 @@ typedef struct {
    int insecure_tls;
    /** \brief Server certificate file */
    char *cafile;
+    /** \brief Refresh directory listing after refresh_timeout seconds*/
+    int refresh_timeout;
    /*--------------- Cache related ---------------*/
    /** \brief Whether cache mode is enabled */
    int cache_enabled;
--- a/src/fuse_local.c
+++ b/src/fuse_local.c
@ -44,7 +44,7 @@ static int fs_getattr(const char *path, struct stat *stbuf)
        if (!link) {
            return -ENOENT;
        }
-        struct timespec spec;
+        struct timespec spec = { 0 };
        spec.tv_sec = link->time;
 #if defined(__APPLE__) && defined(__MACH__)
        stbuf->st_mtimespec = spec;
@ -95,23 +95,29 @@ static int fs_open(const char *path, struct fuse_file_info *fi)
    if (!link) {
        return -ENOENT;
    }
+    lprintf(debug, "%s found.\n", path);
    if ((fi->flags & O_RDWR) != O_RDONLY) {
        return -EROFS;
    }
    if (CACHE_SYSTEM_INIT) {
+        lprintf(debug, "Cache_open(%s);\n", path);
        fi->fh = (uint64_t) Cache_open(path);
        if (!fi->fh) {
            /*
             * The link clearly exists, the cache cannot be opened, attempt
             * cache creation
             */
+            lprintf(debug, "Cache_delete(%s);\n", path);
            Cache_delete(path);
+            lprintf(debug, "Cache_create(%s);\n", path);
            Cache_create(path);
+            lprintf(debug, "Cache_open(%s);\n", path);
            fi->fh = (uint64_t) Cache_open(path);
            /*
             * The cache definitely cannot be opened for some reason.
             */
            if (!fi->fh) {
+                lprintf(fatal, "Cache file creation failure for %s.\n", path);
                return -ENOENT;
            }
        }
@ -138,15 +144,18 @@ fs_readdir(const char *path, void *buf, fuse_fill_dir_t dir_add,
    (void) fi;
    LinkTable *linktbl;

-    if (!strcmp(path, "/")) {
-        linktbl = ROOT_LINK_TBL;
-    } else {
-        linktbl = path_to_Link_LinkTable_new(path);
-        if (!linktbl) {
-            return -ENOENT;
-        }
+#ifdef DEBUG
+    static int j = 0;
+    lprintf(debug, "!!!!Calling fs_readdir for the %d time!!!!\n", j);
+    j++;
+#endif
+
+    linktbl = path_to_Link_LinkTable_new(path);
+    if (!linktbl) {
+        return -ENOENT;
    }

+
    /*
     * start adding the links
     */
--- a/src/link.c
+++ b/src/link.c
@ -27,6 +27,7 @@ int ROOT_LINK_OFFSET = 0;
 * effectively gives LinkTable generation priority over file transfer.
 */
 static pthread_mutex_t link_lock;
+static void make_link_relative(const char *page_url, char *link_url);

 /**
 * \brief create a new Link
@ -36,6 +37,7 @@ static Link *Link_new(const char *linkname, LinkType type)
    Link *link = CALLOC(1, sizeof(Link));

    strncpy(link->linkname, linkname, MAX_FILENAME_LEN);
+    strncpy(link->linkpath, linkname, MAX_FILENAME_LEN);
    link->type = type;

    /*
@ -51,6 +53,7 @@ static Link *Link_new(const char *linkname, LinkType type)

 static CURL *Link_to_curl(Link *link)
 {
+    lprintf(debug, "%s\n", link->f_url);
    CURL *curl = curl_easy_init();
    if (!curl) {
        lprintf(fatal, "curl_easy_init() failed!\n");
@ -184,6 +187,7 @@ static CURL *Link_to_curl(Link *link)

 static void Link_req_file_stat(Link *this_link)
 {
+    lprintf(debug, "%s\n", this_link->f_url);
    CURL *curl = Link_to_curl(this_link);
    CURLcode ret = curl_easy_setopt(curl, CURLOPT_NOBODY, 1);
    if (ret) {
@ -259,7 +263,8 @@ static void LinkTable_uninitialised_fill(LinkTable *linktbl)
 */
 static LinkTable *single_LinkTable_new(const char *url)
 {
-    char *ptr = strrchr(url, '/') + 1;
+    char *orig_ptr = strrchr(url, '/') + 1;
+    char *ptr = curl_easy_unescape(NULL, orig_ptr, 0, NULL);
    LinkTable *linktbl = LinkTable_alloc(url);
    Link *link = Link_new(ptr, LINK_UNINITIALISED_FILE);
    strncpy(link->f_url, url, MAX_FILENAME_LEN);
@ -269,26 +274,20 @@ static LinkTable *single_LinkTable_new(const char *url)
    return linktbl;
 }

-LinkTable *LinkSystem_init(const char *raw_url)
+LinkTable *LinkSystem_init(const char *url)
 {
    if (pthread_mutex_init(&link_lock, NULL)) {
        lprintf(error, "link_lock initialisation failed!\n");
    }
-    /*
-     * Remove excess '/' if it is there
-     */
-    char *url = strdup(raw_url);
    int url_len = strnlen(url, MAX_PATH_LEN) - 1;
-    if (url[url_len] == '/') {
-        url[url_len] = '\0';
-    }
    /*
     * --------- Set the length of the root link -----------
     */
    /*
     * This is where the '/' should be
     */
-    ROOT_LINK_OFFSET = strnlen(url, MAX_PATH_LEN);
+    ROOT_LINK_OFFSET = strnlen(url, MAX_PATH_LEN) -
+                       ((url[url_len] == '/') ? 1 : 0);

    /*
     * --------------------- Enable cache system --------------------
@ -319,7 +318,6 @@ LinkTable *LinkSystem_init(const char *raw_url)
    } else {
        lprintf(fatal, "Invalid CONFIG.mode\n");
    }
-    FREE(url);
    return ROOT_LINK_TBL;
 }

@ -388,7 +386,8 @@ static int linknames_equal(char *linkname, const char *linkname_new)
 * Shamelessly copied and pasted from:
 * https://github.com/google/gumbo-parser/blob/master/examples/find_links.cc
 */
-static void HTML_to_LinkTable(GumboNode *node, LinkTable *linktbl)
+static void HTML_to_LinkTable(const char *url, GumboNode *node,
+                              LinkTable *linktbl)
 {
    if (node->type != GUMBO_NODE_ELEMENT) {
        return;
@ -397,23 +396,21 @@ static void HTML_to_LinkTable(GumboNode *node, LinkTable *linktbl)
    if (node->v.element.tag == GUMBO_TAG_A &&
            (href =
                 gumbo_get_attribute(&node->v.element.attributes, "href"))) {
+        char *link_url = (char *) href->value;
+        make_link_relative(url, link_url);
        /*
         * if it is valid, copy the link onto the heap
         */
-        LinkType type = linkname_to_LinkType(href->value);
+        LinkType type = linkname_to_LinkType(link_url);
        /*
         * We also check if the link being added is the same as the last link.
         * This is to prevent duplicated link, if an Apache server has the
         * IconsAreLinks option.
         */
-        size_t comp_len = strnlen(href->value, MAX_FILENAME_LEN);
-        if (type == LINK_DIR) {
-            comp_len--;
-        }
        if (((type == LINK_DIR) || (type == LINK_UNINITIALISED_FILE)) &&
                !linknames_equal(linktbl->links[linktbl->num - 1]->linkname,
-                                 href->value)) {
-            LinkTable_add(linktbl, Link_new(href->value, type));
+                                 link_url)) {
+            LinkTable_add(linktbl, Link_new(link_url, type));
        }
    }
    /*
@ -421,7 +418,7 @@ static void HTML_to_LinkTable(GumboNode *node, LinkTable *linktbl)
     */
    GumboVector *children = &node->v.element.children;
    for (size_t i = 0; i < children->length; ++i) {
-        HTML_to_LinkTable((GumboNode *) children->data[i], linktbl);
+        HTML_to_LinkTable(url, (GumboNode *) children->data[i], linktbl);
    }
    return;
 }
@ -435,9 +432,9 @@ void Link_set_file_stat(Link *this_link, CURL *curl)
        lprintf(error, "%s", curl_easy_strerror(ret));
    }
    if (http_resp == HTTP_OK) {
-        double cl = 0;
+        curl_off_t cl = 0;
        ret =
-            curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
+            curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &cl);
        if (ret) {
            lprintf(error, "%s", curl_easy_strerror(ret));
        }
@ -466,19 +463,35 @@ void Link_set_file_stat(Link *this_link, CURL *curl)
 static void LinkTable_fill(LinkTable *linktbl)
 {
    Link *head_link = linktbl->links[0];
+    lprintf(debug, "Filling %s\n", head_link->f_url);
    for (int i = 1; i < linktbl->num; i++) {
        Link *this_link = linktbl->links[i];
-        char *url;
-        url = path_append(head_link->f_url, this_link->linkname);
+        /* Some web sites use characters in their href attributes that really
+           shouldn't be in their href attributes, most commonly spaces. And
+           some web sites _do_ properly encode their href attributes. So we
+           first unescape the link path, and then we escape it, so that curl
+           will definitely be happy with it (e.g., curl won't accept URLs with
+           spaces in them!). If we only escaped it, and there were already
+           encoded characters in it, then that would break the link. */
+        char *unescaped_path = curl_easy_unescape(NULL, this_link->linkpath, 0,
+                               NULL);
+        char *escaped_path = curl_easy_escape(NULL, unescaped_path, 0);
+        curl_free(unescaped_path);
+        /* Our code does the wrong thing if there's a trailing slash that's been
+           replaced with %2F, which curl_easy_escape does, God bless it, so if
+           it did that then let's put it back. */
+        int escaped_len = strlen(escaped_path);
+        if (escaped_len >= 3 && !strcmp(escaped_path + escaped_len - 3, "%2F"))
+            strcpy(escaped_path + escaped_len - 3, "/");
+        char *url = path_append(head_link->f_url, escaped_path);
+        curl_free(escaped_path);
        strncpy(this_link->f_url, url, MAX_PATH_LEN);
        FREE(url);
        char *unescaped_linkname;
-        CURL *c = curl_easy_init();
-        unescaped_linkname = curl_easy_unescape(c, this_link->linkname,
+        unescaped_linkname = curl_easy_unescape(NULL, this_link->linkname,
                                                0, NULL);
        strncpy(this_link->linkname, unescaped_linkname, MAX_FILENAME_LEN);
        curl_free(unescaped_linkname);
-        curl_easy_cleanup(c);
    }
    LinkTable_uninitialised_fill(linktbl);
 }
@ -501,11 +514,14 @@ static void LinkTable_invalid_reset(LinkTable *linktbl)

 void LinkTable_free(LinkTable *linktbl)
 {
-    for (int i = 0; i < linktbl->num; i++) {
-        FREE(linktbl->links[i]);
+    if (linktbl) {
+        for (int i = 0; i < linktbl->num; i++) {
+            LinkTable_free(linktbl->links[i]->next_table);
+            FREE(linktbl->links[i]);
+        }
+        FREE(linktbl->links);
+        FREE(linktbl);
    }
-    FREE(linktbl->links);
-    FREE(linktbl);
 }

 void LinkTable_print(LinkTable *linktbl)
@ -538,6 +554,10 @@ void LinkTable_print(LinkTable *linktbl)
 LinkTable *LinkTable_alloc(const char *url)
 {
    LinkTable *linktbl = CALLOC(1, sizeof(LinkTable));
+    linktbl->num = 0;
+    linktbl->index_time = 0;
+    linktbl->links = NULL;
+

    /*
     * populate the base URL
@ -551,78 +571,81 @@ LinkTable *LinkTable_alloc(const char *url)

 LinkTable *LinkTable_new(const char *url)
 {
-    LinkTable *linktbl = LinkTable_alloc(url);
-
-    /*
-     * start downloading the base URL
-     */
-    TransferStruct ts = Link_download_full(linktbl->links[0]);
-    if (ts.curr_size == 0) {
-        LinkTable_free(linktbl);
-        return NULL;
-    }
-
-    /*
-     * Otherwise parsed the received data
-     */
-    GumboOutput *output = gumbo_parse(ts.data);
-    HTML_to_LinkTable(output->root, linktbl);
-    gumbo_destroy_output(&kGumboDefaultOptions, output);
-    FREE(ts.data);
-
-    int skip_fill = 0;
    char *unescaped_path;
-    CURL *c = curl_easy_init();
    unescaped_path =
-        curl_easy_unescape(c, url + ROOT_LINK_OFFSET, 0, NULL);
+        curl_easy_unescape(NULL, url + ROOT_LINK_OFFSET, 0, NULL);
+    LinkTable *linktbl = NULL;
+
+    /*
+     * Attempt to load the LinkTable from the disk.
+     */
    if (CACHE_SYSTEM_INIT) {
        CacheDir_create(unescaped_path);
        LinkTable *disk_linktbl;
+
        disk_linktbl = LinkTable_disk_open(unescaped_path);
        if (disk_linktbl) {
            /*
-             * Check if we need to update the link table
+             * Check if the LinkTable needs to be refreshed based on timeout.
             */
-            lprintf(debug,
-                    "disk_linktbl->num: %d, linktbl->num: %d\n",
-                    disk_linktbl->num, linktbl->num);
-            if (disk_linktbl->num == linktbl->num) {
-                LinkTable_free(linktbl);
-                linktbl = disk_linktbl;
-                skip_fill = 1;
-            } else {
+            time_t time_now = time(NULL);
+            if (time_now - disk_linktbl->index_time  > CONFIG.refresh_timeout) {
+                lprintf(info, "time_now: %d, index_time: %d\n", time_now,
+                        disk_linktbl->index_time);
+                lprintf(info, "diff: %d, limit: %d\n",
+                        time_now - disk_linktbl->index_time,
+                        CONFIG.refresh_timeout);
                LinkTable_free(disk_linktbl);
+            } else {
+                linktbl = disk_linktbl;
            }
        }
    }

-    if (!skip_fill) {
-        /*
-         * Fill in the link table
-         */
-        LinkTable_fill(linktbl);
-    } else {
-        /*
-         * Fill in the holes in the link table
-         */
-        LinkTable_invalid_reset(linktbl);
-        LinkTable_uninitialised_fill(linktbl);
-    }
-
    /*
-     * Save the link table
+     * Download a new LinkTable because we didn't manange to load it from the
+     * disk
     */
-    if (CACHE_SYSTEM_INIT) {
-        if (LinkTable_disk_save(linktbl, unescaped_path)) {
-            lprintf(error, "Failed to save the LinkTable!\n");
+    if (!linktbl) {
+        linktbl->index_time = time(NULL);
+        lprintf(debug, "linktbl->index_time: %d\n", linktbl->index_time);
+
+        /*
+        * start downloading the base URL
+        */
+        TransferStruct ts = Link_download_full(linktbl->links[0]);
+        if (ts.curr_size == 0) {
+            LinkTable_free(linktbl);
+            return NULL;
+        }
+
+        /*
+        * Otherwise parsed the received data
+        */
+        GumboOutput *output = gumbo_parse(ts.data);
+        HTML_to_LinkTable(url, output->root, linktbl);
+        gumbo_destroy_output(&kGumboDefaultOptions, output);
+        FREE(ts.data);
+
+        LinkTable_fill(linktbl);
+
+        /*
+        * Save the link table
+        */
+        if (CACHE_SYSTEM_INIT) {
+            if (LinkTable_disk_save(linktbl, unescaped_path)) {
+                lprintf(error, "Failed to save the LinkTable!\n");
+            }
        }
    }

-    curl_free(unescaped_path);
-    curl_easy_cleanup(c);
-
+#ifdef DEBUG
+    static int i = 0;
+    lprintf(debug, "!!!!Calling LinkTable_new for the %d time!!!!\n", i);
+    i++;
+#endif
+    free(unescaped_path);
    LinkTable_print(linktbl);
-
    return linktbl;
 }

@ -638,6 +661,14 @@ static void LinkTable_disk_delete(const char *dirn)
    FREE(metadirn);
 }

+/* This is necessary to get the compiler on some platforms to stop
+   complaining about the fact that we're not using the return value of
+   fread, when we know we aren't and that's fine. */
+static inline void ignore_value(int i)
+{
+    (void) i;
+}
+
 int LinkTable_disk_save(LinkTable *linktbl, const char *dirn)
 {
    char *metadirn = path_append(META_DIR, dirn);
@ -651,16 +682,20 @@ int LinkTable_disk_save(LinkTable *linktbl, const char *dirn)
        FREE(path);
        return -1;
    }
-    FREE(path);

-    fwrite(&linktbl->num, sizeof(int), 1, fp);
+    lprintf(debug, "linktbl->index_time: %d\n", linktbl->index_time);
+    if (fwrite(&linktbl->num, sizeof(int), 1, fp) != 1 ||
+            fwrite(&linktbl->index_time, sizeof(time_t), 1, fp) != 1) {
+        lprintf(error, "Failed to save the header of %s!\n", path);
+    }
+    FREE(path);
    for (int i = 0; i < linktbl->num; i++) {
-        fwrite(linktbl->links[i]->linkname, sizeof(char),
-               MAX_FILENAME_LEN, fp);
-        fwrite(linktbl->links[i]->f_url, sizeof(char), MAX_PATH_LEN, fp);
-        fwrite(&linktbl->links[i]->type, sizeof(LinkType), 1, fp);
-        fwrite(&linktbl->links[i]->content_length, sizeof(size_t), 1, fp);
-        fwrite(&linktbl->links[i]->time, sizeof(long), 1, fp);
+        ignore_value(fwrite(linktbl->links[i]->linkname, sizeof(char),
+                            MAX_FILENAME_LEN, fp));
+        ignore_value(fwrite(linktbl->links[i]->f_url, sizeof(char), MAX_PATH_LEN, fp));
+        ignore_value(fwrite(&linktbl->links[i]->type, sizeof(LinkType), 1, fp));
+        ignore_value(fwrite(&linktbl->links[i]->content_length, sizeof(size_t), 1, fp));
+        ignore_value(fwrite(&linktbl->links[i]->time, sizeof(long), 1, fp));
    }

    int res = 0;
@ -692,33 +727,43 @@ LinkTable *LinkTable_disk_open(const char *dirn)
    FREE(metadirn);

    if (!fp) {
+        lprintf(debug, "Linktable at %s does not exist.", path);
        FREE(path);
        return NULL;
    }

    LinkTable *linktbl = CALLOC(1, sizeof(LinkTable));
+    if (fread(&linktbl->num, sizeof(int), 1, fp) != 1 ||
+            fread(&linktbl->index_time, sizeof(time_t), 1, fp) != 1) {
+        lprintf(error, "Failed to read the header of %s!\n", path);
+        LinkTable_free(linktbl);
+        LinkTable_disk_delete(dirn);
+        FREE(path);
+        return NULL;
+    }
+    lprintf(debug, "linktbl->index_time: %d\n", linktbl->index_time);

-    fread(&linktbl->num, sizeof(int), 1, fp);
    linktbl->links = CALLOC(linktbl->num, sizeof(Link *));
    for (int i = 0; i < linktbl->num; i++) {
        linktbl->links[i] = CALLOC(1, sizeof(Link));
-        fread(linktbl->links[i]->linkname, sizeof(char),
-              MAX_FILENAME_LEN, fp);
-        fread(linktbl->links[i]->f_url, sizeof(char), MAX_PATH_LEN, fp);
-        fread(&linktbl->links[i]->type, sizeof(LinkType), 1, fp);
-        fread(&linktbl->links[i]->content_length, sizeof(size_t), 1, fp);
-        fread(&linktbl->links[i]->time, sizeof(long), 1, fp);
+        /* The return values are safe to ignore here since we check them
+           immediately afterwards with feof() and ferror(). */
+        ignore_value(fread(linktbl->links[i]->linkname, sizeof(char),
+                           MAX_FILENAME_LEN, fp));
+        ignore_value(fread(linktbl->links[i]->f_url, sizeof(char),
+                           MAX_PATH_LEN, fp));
+        ignore_value(fread(&linktbl->links[i]->type, sizeof(LinkType), 1, fp));
+        ignore_value(fread(&linktbl->links[i]->content_length,
+                           sizeof(size_t), 1, fp));
+        ignore_value(fread(&linktbl->links[i]->time, sizeof(long), 1, fp));
        if (feof(fp)) {
-            /*
-             * reached EOF
-             */
-            lprintf(error, "reached EOF!\n");
+            lprintf(error, "Corrupted LinkTable!\n");
            LinkTable_free(linktbl);
            LinkTable_disk_delete(dirn);
            return NULL;
        }
        if (ferror(fp)) {
-            lprintf(error, "encountered ferror!\n");
+            lprintf(error, "Encountered ferror!\n");
            LinkTable_free(linktbl);
            LinkTable_disk_delete(dirn);
            return NULL;
@ -728,29 +773,51 @@ LinkTable *LinkTable_disk_open(const char *dirn)
        lprintf(error,
                "cannot close the file pointer, %s\n", strerror(errno));
    }
+
+    FREE(path);
    return linktbl;
 }

 LinkTable *path_to_Link_LinkTable_new(const char *path)
 {
-    Link *link = path_to_Link(path);
-    LinkTable *next_table = link->next_table;
+    Link *link = NULL;
+    Link *tmp_link = NULL;
+    Link link_cpy = { 0 };
+    LinkTable *next_table = NULL;
+    if (!strcmp(path, "/")) {
+        next_table = ROOT_LINK_TBL;
+        link_cpy = *next_table->links[0];
+        tmp_link = &link_cpy;
+    } else {
+        link = path_to_Link(path);
+        tmp_link = link;
+    }
+
+    if (next_table) {
+
+    }
    if (!next_table) {
        if (CONFIG.mode == NORMAL) {
-            next_table = LinkTable_new(link->f_url);
+            next_table = LinkTable_new(tmp_link->f_url);
+        } else if (CONFIG.mode == SINGLE) {
+            next_table = single_LinkTable_new(tmp_link->f_url);
        } else if (CONFIG.mode == SONIC) {
            if (!CONFIG.sonic_id3) {
-                next_table = sonic_LinkTable_new_index(link->sonic.id);
+                next_table = sonic_LinkTable_new_index(tmp_link->sonic.id);
            } else {
                next_table =
-                    sonic_LinkTable_new_id3(link->sonic.depth,
-                                            link->sonic.id);
+                    sonic_LinkTable_new_id3(tmp_link->sonic.depth,
+                                            tmp_link->sonic.id);
            }
        } else {
-            lprintf(fatal, "Invalid CONFIG.mode\n");
+            lprintf(fatal, "Invalid CONFIG.mode: %d\n", CONFIG.mode);
        }
    }
-    link->next_table = next_table;
+    if (link) {
+        link->next_table = next_table;
+    } else {
+        ROOT_LINK_TBL = next_table;
+    }
    return next_table;
 }

@ -916,7 +983,7 @@ static CURL *Link_download_curl_setup(Link *link, size_t req_size, off_t offset,
    }

    size_t start = offset;
-    size_t end = start + req_size;
+    size_t end = start + req_size - 1;

    char range_str[64];
    snprintf(range_str, sizeof(range_str), "%lu-%lu", start, end);
@ -964,9 +1031,9 @@ range requests\n");
    if (ret) {
        lprintf(error, "%s", curl_easy_strerror(ret));
    }
-    if (!((http_resp != HTTP_OK) ||
-            (http_resp != HTTP_PARTIAL_CONTENT) ||
-            (http_resp != HTTP_RANGE_NOT_SATISFIABLE))) {
+    if ((http_resp != HTTP_OK) &&
+            (http_resp != HTTP_PARTIAL_CONTENT) &&
+            (http_resp != HTTP_RANGE_NOT_SATISFIABLE)) {
        char *url;
        curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url);
        lprintf(warning, "Could not download %s, HTTP %ld\n", url, http_resp);
@ -996,6 +1063,13 @@ long Link_download(Link *link, char *output_buf, size_t req_size, off_t offset)
    header.curr_size = 0;
    header.data = NULL;

+    if (offset + req_size > link->content_length) {
+        lprintf(info,
+                "requested size too larger than remaining size, req_size: %lu, recv: %ld, content-length: %ld\n",
+                req_size, recv, link->content_length);
+        req_size = link->content_length - offset;
+    }
+
    CURL *curl = Link_download_curl_setup(link, req_size, offset, &header, &ts);

    transfer_blocking(curl);
@ -1030,3 +1104,73 @@ long path_download(const char *path, char *output_buf, size_t req_size,

    return Link_download(link, output_buf, req_size, offset);
 }
+
+static void make_link_relative(const char *page_url, char *link_url)
+{
+    /*
+      Some servers make the links to subdirectories absolute (in URI terms:
+      path-absolute), but our code expects them to be relative (in URI terms:
+      path-noscheme), so change the contents of link_url as needed to
+      accommodate that.
+
+      Also, some servers serve their links as `./name`. This is helpful to
+      them because it is the only way to express relative references when the
+      first new path segment of the target contains an unescaped colon (`:`),
+      eg in `./6:1-balun.png`. While stripping the ./ strictly speaking
+      reintroduces that ambiguity, it is of little practical concern in this
+      implementation, as full URI link targets are filtered by their number of
+      slashes anyway. In URI terms, this converts path-noscheme with a leading
+      `.` segment into path-noscheme or path-rootless without that segment.
+    */
+
+    if (link_url[0] == '.' && link_url[1] == '/') {
+        memmove(link_url, link_url + 2, strlen(link_url) - 1);
+        return;
+    }
+
+    if (link_url[0] != '/') {
+        /* Already relative, nothing to do here!
+
+          (Full URIs, eg. `http://example.com/path`, pass through here
+          unmodified, but those are classified in different LinkTypes later
+          anyway).
+         */
+        return;
+    }
+
+    /* Find the slash after the host name. */
+    int slashes_left_to_find = 3;
+    while (*page_url) {
+        if (*page_url == '/' && ! --slashes_left_to_find)
+            break;
+        /* N.B. This is here, rather than doing `while (*page_url++)`, because
+           when we're done we want the pointer to point at the final slash. */
+        page_url++;
+    }
+    if (slashes_left_to_find) {
+        if (slashes_left_to_find == 1 && ! *page_url)
+            /* We're at the top level of the web site and the user entered the URL
+               without a trailing slash. */
+            page_url = "/";
+        else
+            /* Well, that's odd. Let's return rather than trying to dig ourselves
+               deeper into whatever hole we're in. */
+            return;
+    }
+    /* The page URL is no longer the full page_url, it's just the part after
+       the host name. */
+    /* The link URL should start with the page URL. */
+    if (strstr(link_url, page_url) != link_url)
+        return;
+    int skip_len = strlen(page_url);
+    if (page_url[skip_len-1] != '/') {
+        if (page_url[skip_len] != '/')
+            /* Um, I'm not sure what to do here, so give up. */
+            return;
+        skip_len++;
+    }
+    /* Move the part of the link URL after the parent page's pat to
+       the beginning of the link URL string, discarding what came
+       before it. */
+    memmove(link_url, link_url + skip_len, strlen(link_url) - skip_len + 1);
+}
--- a/src/link.h
+++ b/src/link.h
@ -33,6 +33,7 @@ typedef enum {
 */
 struct LinkTable {
    int num;
+    time_t index_time;
    Link **links;
 };

@ -42,6 +43,8 @@ struct LinkTable {
 struct Link {
    /** \brief The link name in the last level of the URL */
    char linkname[MAX_FILENAME_LEN + 1];
+    /** \brief This is for storing the unescaped path */
+    char linkpath[MAX_FILENAME_LEN + 1];
    /** \brief The full URL of the file */
    char f_url[MAX_PATH_LEN + 1];
    /** \brief The type of the link */
@ -114,6 +117,7 @@ int LinkTable_disk_save(LinkTable *linktbl, const char *dirn);

 /**
 * \brief load a link table from the disk.
+ * \param[in] dirn We expected the unescaped_path here!
 */
 LinkTable *LinkTable_disk_open(const char *dirn);

--- a/src/log.c
+++ b/src/log.c
@ -15,7 +15,11 @@ int log_level_init()
    if (env) {
        return atoi(env);
    }
+#ifdef DEBUG
+    return DEFAULT_LOG_LEVEL | debug;
+#else
    return DEFAULT_LOG_LEVEL;
+#endif
 }

 void
@ -36,7 +40,11 @@ log_printf(LogType type, const char *file, const char *func, int line,
        case info:
            goto print_actual_message;
        default:
-            fprintf(stderr, "Debug(%x):", type);
+            fprintf(stderr, "Debug");
+            if (type != debug) {
+                fprintf(stderr, "(%x)", type);
+            }
+            fprintf(stderr, ":");
            break;
        }

--- a/src/log.h
+++ b/src/log.h
@ -39,10 +39,11 @@ void log_printf(LogType type, const char *file, const char *func, int line,
 * \details This macro automatically prints out the filename and line number
 */
 #define lprintf(type, ...) \
-    log_printf(type, __FILE__, __func__, __LINE__, __VA_ARGS__);
-#endif
+    log_printf(type, __FILE__, __func__, __LINE__, __VA_ARGS__)

 /**
 * \brief Print the version information for HTTPDirFS
 */
 void print_version();
+
+#endif
--- a/src/main.c
+++ b/src/main.c
@ -201,6 +201,7 @@ parse_arg_list(int argc, char **argv, char ***fuse_argv, int *fuse_argc)
        { "single-file-mode", required_argument, NULL, 'L' },   /* 22 */
        { "cacert", required_argument, NULL, 'L' },     /* 23 */
        { "proxy-cacert", required_argument, NULL, 'L' },       /* 24 */
+        { "refresh-timeout", required_argument, NULL, 'L' }, /* 25 */
        { 0, 0, 0, 0 }
    };
    while ((c =
@ -219,11 +220,12 @@ parse_arg_list(int argc, char **argv, char ***fuse_argv, int *fuse_argc)
             */
            return 1;
        case 'V':
-            print_version(argv[0], 1);
+            print_version();
            add_arg(fuse_argv, fuse_argc, "-V");
            return 1;
        case 'd':
            add_arg(fuse_argv, fuse_argc, "-d");
+            CONFIG.log_type |= debug;
            break;
        case 'f':
            add_arg(fuse_argv, fuse_argc, "-f");
@ -304,6 +306,9 @@ parse_arg_list(int argc, char **argv, char ***fuse_argv, int *fuse_argc)
            case 24:
                CONFIG.proxy_cafile = strdup(optarg);
                break;
+            case 25:
+                CONFIG.refresh_timeout = atoi(optarg);
+                break;
            default:
                fprintf(stderr, "see httpdirfs -h for usage\n");
                return 1;
@ -370,10 +375,12 @@ HTTPDirFS options:\n\
                            to 1TB in size using the default segment size.\n\
        --max-conns         Set maximum number of network connections that\n\
                            libcurl is allowed to make. (default: 10)\n\
+        --refresh-timeout   The directories are refreshed after the specified\n\
+                            time, in seconds (default: 3600)\n\
        --retry-wait        Set delay in seconds before retrying an HTTP request\n\
                            after encountering an error. (default: 5)\n\
        --user-agent        Set user agent string (default: \"HTTPDirFS\")\n\
-        --no-range-check    Disable the build-in check for the server's support\n\
+        --no-range-check    Disable the built-in check for the server's support\n\
                            for HTTP range requests\n\
        --insecure-tls      Disable licurl TLS certificate verification by\n\
                            setting CURLOPT_SSL_VERIFYHOST to 0\n\
--- a/src/sonic.c
+++ b/src/sonic.c
@ -24,7 +24,7 @@ typedef struct {
 static SonicConfigStruct SONIC_CONFIG;

 /**
- * \brief initalise Sonic configuration struct
+ * \brief initialise Sonic configuration struct
 */
 void
 sonic_config_init(const char *server, const char *username,
@ -319,27 +319,28 @@ XML_parser_general(void *data, const char *elem, const char **attr)
    LinkTable_add(linktbl, link);
 }

-static void sanitise_LinkTable(LinkTable *linktbl) {
+static void sanitise_LinkTable(LinkTable *linktbl)
+{
    for (int i = 0; i < linktbl->num; i++) {
-	    if (!strcmp(linktbl->links[i]->linkname, ".")) {
+        if (!strcmp(linktbl->links[i]->linkname, ".")) {
            /* Note the super long sanitised name to avoid collision */
-		    strcpy(linktbl->links[i]->linkname, "__DOT__");
-	    }
+            strcpy(linktbl->links[i]->linkname, "__DOT__");
+        }

-	    if (!strcmp(linktbl->links[i]->linkname, "/")) {
+        if (!strcmp(linktbl->links[i]->linkname, "/")) {
            /* Ditto */
-		    strcpy(linktbl->links[i]->linkname, "__FORWARD-SLASH__");
-	    }
+            strcpy(linktbl->links[i]->linkname, "__FORWARD-SLASH__");
+        }

-	    for (size_t j = 0; j < strlen(linktbl->links[i]->linkname); j++) {
-		    if (linktbl->links[i]->linkname[j] == '/') {
-			    linktbl->links[i]->linkname[j] = '-';
-		    }
-	    }
+        for (size_t j = 0; j < strlen(linktbl->links[i]->linkname); j++) {
+            if (linktbl->links[i]->linkname[j] == '/') {
+                linktbl->links[i]->linkname[j] = '-';
+            }
+        }

-	    if (linktbl->links[i]->next_table != NULL) {
-		    sanitise_LinkTable(linktbl->links[i]->next_table);
-	    }
+        if (linktbl->links[i]->next_table != NULL) {
+            sanitise_LinkTable(linktbl->links[i]->next_table);
+        }
    }
 }

--- a/src/sonic.h
+++ b/src/sonic.h
@ -8,7 +8,7 @@
 typedef struct {
    /**
     * \brief Sonic id field
-     * \details This is used to store the followings:
+     * \details This is used to store the following:
     *  - Arist ID
     *  - Album ID
     *  - Song ID
Author	SHA1	Message	Date
Fufu Fang	07475660f1	updated LinkTable invalidation	2024-05-11 23:15:32 +01:00
Fufu Fang	a5a53442b2	updated the description for refreshing directories	2024-05-11 17:28:23 +01:00
Fufu Fang	9e383ad7a3	Moved linktable freshness check around Fixed https://github.com/fangfufu/httpdirfs/issues/141	2024-05-11 01:53:30 +01:00
Fufu Fang	127f2194d0	added more comments	2024-05-07 01:44:01 +01:00
Fufu Fang	4fb95ee5a0	attempt to fix codeql	2024-05-06 00:47:22 +01:00
Fufu Fang	720db5aafa	fixed cache system for percentage encoded file in single-file mode	2024-05-06 00:12:03 +01:00
Fufu Fang	28293b5ccd	fixed erroneous error check	2024-05-05 03:14:51 +01:00
Fufu Fang	1a20318654	added more debug statements	2024-05-05 02:55:10 +01:00
Fufu Fang	9a7eabd170	modified debug message	2024-05-05 02:04:31 +01:00
Fufu Fang	01fd2e9559	changed the way debug level works	2024-05-05 02:00:46 +01:00
Fufu Fang	be666d72e9	removed semi-colon at the end of a macro	2024-05-05 00:32:00 +01:00
Fufu Fang	1fa3830dec	run through the formatter	2024-05-03 07:39:14 +01:00
Fufu Fang	8aa7c570c8	added a todo note	2024-05-03 07:37:44 +01:00
Fufu Fang	389a657170	improved debug message	2024-05-03 07:33:41 +01:00
Fufu Fang	257bb22e80	Merge branch 'master' into debug	2024-05-03 07:20:08 +01:00
Fufu Fang	a299819b7d	fixed a memory leak, improved error handling in cache system	2024-05-03 07:19:24 +01:00
Fufu Fang	3e7d9f0294	start labelling what might be wrong.	2024-05-03 06:44:59 +01:00
Fufu Fang	63455c54cc	initial commit to the debug branch	2024-05-03 06:44:33 +01:00
Fufu Fang	d4c7d8c92a	added more debug message	2024-05-03 06:44:01 +01:00
Fufu Fang	dfc83d0e1c	improved debug message	2024-05-03 06:24:50 +01:00
Fufu Fang	96a7c248d3	improved debug message	2024-05-03 05:59:09 +01:00
Fufu Fang	f92fe4232a	attempt to fix codeQL	2024-05-02 07:07:58 +01:00
Fufu Fang	91351689f1	LinkTable now saves the refresh time	2024-05-02 06:59:22 +01:00
Fufu Fang	1a3f36a92c	Corrected an implementation error and added more comments	2024-05-02 04:45:34 +01:00
Fufu Fang	d6d4af0c8c	Update README.md Fix https://github.com/fangfufu/httpdirfs/issues/136	2024-04-20 01:30:52 +01:00
Fufu Fang	f48ee93931	Update README.md	2024-02-01 09:58:05 +00:00
Fufu Fang	983b1edfbd	Updated README	2024-02-01 06:28:36 +00:00
Fufu Fang	707d9b9253	Configure online code scanning tools - Added .deepsource.toml for Deep Source - Added configuration for GitHub CodeQL	2024-02-01 02:53:26 +00:00
Fufu Fang	81aac8bb57	fixed spelling, ran through the formatter	2024-01-13 12:31:47 +00:00
Mattias Runge-Broberg	35a213942c	Fix for single file mode not working - Fix for not sending ranges which exceed the content-length which will result in an error. - Fix for byte range being set to 1 byte too large, it should be the end index, not the size as described in https://developer.mozilla.org/en-US/docs/Web/HTTP/Range_requests	2024-01-13 12:30:52 +00:00
Fufu Fang	595c6d275e	Remove spurious code Remote spurious code flagged by `8451da6ac7`, which was introduced by `e76b079fe6` Closes https://github.com/fangfufu/httpdirfs/issues/124	2023-10-03 23:10:24 +01:00
chrysn	bd33966337	Allow leading `./` segments in links	2023-10-02 23:44:18 +01:00
Jonathan Kamens	29c3eb8f67	Convert build process to use autotools (autoconf, automake, etc.) This commit converts the build process from a hand-written Makefile that works on Linux, FreeBSD, and macOS, to an automatically generated Makefile managed by the autotools toolset. This incldues: * Add the compile, config.guess, config.sub, depcomp, install-sh, and missing helper scripts that autotools requires to be shipped with the package in order for configure to work. * Rename Makefile to Makefile.am and restructure it for compatibility with autotools and specifically with the stuff in our configure script. * Create the configure.ac source file which is turned into the configure script. * Rename Doxyfile to Doxyfile.in so that the source directories can be substituted into it at configure time. * Tweak .gitignore to ignore temporary and output files related to autotools. * Generate Makefile.in, aclocal.m4, and configure using `autoreconf` and include them as checked-in source files. While I can't fully document how autotools works here the basic workflow is that when you need to make changes to the build, you update Makefile.am and/or configure.ac as needed, run `autoreconf`, and commit the changes you made as well as any resulting changes to Makefile.in, aclocal.m4, and configure. Makefile should _not_ be committed into the source tree; it should always be generated using configure on the system where the build is being run.	2023-09-29 23:45:47 +01:00
Jonathan Kamens	ed93a133df	Fix minor logic bug and code smell in make_link_relative Don't assume that the reason why we didn't find enough slashes in a URL is because the user didn't specify the slash at the end of the host name, unless we did find the first two slashes. Add some curly braces around an if block to make it clear to people and the compiler which statement an `else` applies to. The logic was correct before but the indentation was wrong, making it especially confusing.	2023-09-29 23:45:47 +01:00
Jonathan Kamens	7bcd43068d	Fix broken curl HTTP response code check The check for the HTTP response code from the curl library was written incorrectly and guaranteed to always fail. I've fixed the logic to reflect what I believe was intended.	2023-09-29 23:45:47 +01:00
Jonathan Kamens	ab49ca76b6	Add missing return value check for fread call	2023-09-29 23:45:47 +01:00
Jonathan Kamens	8451da6ac7	Comment out small block of code that doesn't do anything There's a small block of code that calls strnlen on a string, saves the esult in a variable, conditionally decrements the variable, and then does nothing with it, making the entire block of code a no-op. I don't want to just remove it entirely since it's possible that there was intended to be some sort of check here that was inadvertently omitted. So to make the compiler stop complaining I've commented out the code, but I've left a comment above it explaining why it was commented out and pointing out that maybe something different needs to be done with it.	2023-09-29 23:45:47 +01:00
Jonathan Kamens	e253b4a9ee	Eliminate some compiler warnings	2023-09-29 23:45:47 +01:00
Jonathan Kamens	8f0ef158c0	Remove spurious arguments to print_version()	2023-09-29 23:45:47 +01:00
Jonathan Kamens	c532661d29	Add missing error-checking for return value of fread Several calls to fread were missing checks to ensure that the expected amount of data was read.	2023-09-29 23:45:47 +01:00
Jonathan Kamens	7363adaf12	Handle sites that put unencoded characters in URLs that curl dislikes Some sites put unencoded characters in their href attributes that really should be encoded, most notably spaces. Curl won't accept a URL with a space in it, and perhaps other such characters as well. Address this by properly encoding characters in URLs before feeding them to Curl.	2023-09-29 12:47:55 +01:00
Jonathan Kamens	e94b5441f3	Add a few more debug messages to help trace program execution	2023-09-29 12:47:55 +01:00
Jonathan Kamens	3beccd2c2d	Enabling debugging on command line should enable debug logging I believe an appropriate expectation is that if the user enables debugging with a command-line flag, then that should also enable messagse designated as debug messages in the code to be printed.	2023-09-29 12:47:55 +01:00
Jonathan Kamens	4d323b846f	Do the right thing with sites that use absolute links On some sites, the link to each subfolder is an absolute link rather than a relative one. To accommodate this, convert the links from absolute to relative before storing them in the link table.	2023-09-29 12:47:55 +01:00
Jonathan Kamens	41cb4b80bc	Do the right thing with sites that require the final slash Some web sites will return 404 if you fetch a directory without the final slash. For example, https://archive.mozilla.org/pub/ works, https://archive.mozilla.org/pub does not. We need to do two things to accommodate this: * When processing the root URL of the filesystem, instead of stripping off the final slash, just set the offset to ignore it. * In the link structure, store the actual URL tail of the link separately from its name, final slash and all if there is one, and append that instead of the name when constructing the URL for curl.	2023-09-29 12:47:55 +01:00
Fufu Fang	1e80844831	ran the code through formatter	2023-07-26 07:48:33 +08:00
Fufu Fang	6d8db94458	minor formatting changes for PR #114	2023-07-26 07:48:22 +08:00
Fufu Fang	282605b0ac	fix: changed deprecated libcurl call	2023-07-25 14:57:08 +08:00
Mike Morrison	a309994b9e	Add setting to refresh directory contents (#114 ) Refresh a directory's contents when fs_readdir is called if it has been more than the number of seconds specified by --refresh_timeout since the directory was last indexed.	2023-03-31 13:26:15 +01:00
Kian-Meng Ang	9a7016f29b	Fix typos (#117 ) Found via `codespell`	2023-03-28 05:00:07 +01:00
Fufu Fang	8479feb2f6	Bumped version number to 1.2.5 for Debian release	2023-02-24 19:47:23 +00:00
Fufu Fang	fe45afc6a1	Remove the usage of UBSAN Address issue #113. Use of UBSAN in runtime could introduce vulnerabilities. Original bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031744 Reference: https://www.openwall.com/lists/oss-security/2016/02/17/9	2023-02-23 01:44:18 +00:00
Jérôme Charaoui	e9f60d5221	fix typo	2023-01-28 12:02:31 -05:00
Jérôme Charaoui	74fac1dce0	bump VERSION in Makefile	2023-01-28 12:01:06 -05:00
Fufu Fang	9b72f97bcf	Update README.md	2023-01-14 00:04:12 +00:00