mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-08 00:49:26 +02:00
b9f698eccb
Also a quick but half-baked attempt to make trim_trailing_separator do the right thing with path consisting only of '/' --- still needs work for Windows I think.
398 lines
7.2 KiB
C
398 lines
7.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* path.c
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* portable path handling routines
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/port/path.c,v 1.21 2004/07/10 22:58:42 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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#include <ctype.h>
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#include "pg_config_paths.h"
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#ifndef WIN32
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#define IS_DIR_SEP(ch) ((ch) == '/')
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#else
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#define IS_DIR_SEP(ch) ((ch) == '/' || (ch) == '\\')
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#endif
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#ifndef WIN32
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#define IS_PATH_SEP(ch) ((ch) == ':')
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#else
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#define IS_PATH_SEP(ch) ((ch) == ';')
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#endif
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const static char *relative_path(const char *bin_path, const char *other_path);
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static void trim_directory(char *path);
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static void trim_trailing_separator(char *path);
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/* Move to last of consecutive separators or to null byte */
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#define MOVE_TO_SEP_END(p) \
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{ \
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while (IS_DIR_SEP((p)[0]) && (IS_DIR_SEP((p)[1]) || !(p)[1])) \
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(p)++; \
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}
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/* Macro creates a relative path */
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#define MAKE_RELATIVE \
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do { \
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StrNCpy(path, my_exec_path, MAXPGPATH); \
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trim_directory(path); \
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trim_directory(path); \
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snprintf(ret_path, MAXPGPATH, "%s/%s", path, p); \
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} while (0)
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/*
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* first_dir_separator
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*/
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char *
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first_dir_separator(const char *filename)
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{
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char *p;
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for (p = (char *)filename; *p; p++)
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if (IS_DIR_SEP(*p))
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return p;
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return NULL;
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}
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/*
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* first_path_separator
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*/
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char *
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first_path_separator(const char *filename)
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{
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char *p;
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for (p = (char *)filename; *p; p++)
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if (IS_PATH_SEP(*p))
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return p;
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return NULL;
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}
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/*
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* last_dir_separator
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*/
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char *
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last_dir_separator(const char *filename)
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{
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char *p, *ret = NULL;
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for (p = (char *)filename; *p; p++)
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if (IS_DIR_SEP(*p))
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ret = p;
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return ret;
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}
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/*
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* make all paths look like unix, with forward slashes
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* also strip any trailing slash.
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*
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* The Windows command processor will accept suitably quoted paths
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* with forward slashes, but barfs badly with mixed forward and back
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* slashes. Removing the trailing slash on a path means we never get
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* ugly double slashes. Don't remove a leading slash, though.
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*/
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void
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canonicalize_path(char *path)
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{
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#ifdef WIN32
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char *p;
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for (p = path; *p; p++)
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{
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if (*p == '\\')
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*p = '/';
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}
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#endif
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trim_trailing_separator(path);
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}
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/*
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* Extracts the actual name of the program as called.
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*/
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const char *
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get_progname(const char *argv0)
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{
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if (!last_dir_separator(argv0))
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return argv0;
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else
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return last_dir_separator(argv0) + 1;
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}
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/*
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* get_share_path
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*/
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void
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get_share_path(const char *my_exec_path, char *ret_path)
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{
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char path[MAXPGPATH];
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const char *p;
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if ((p = relative_path(PGBINDIR, PGSHAREDIR)))
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MAKE_RELATIVE;
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else
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StrNCpy(ret_path, PGSHAREDIR, MAXPGPATH);
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}
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/*
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* get_etc_path
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*/
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void
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get_etc_path(const char *my_exec_path, char *ret_path)
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{
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char path[MAXPGPATH];
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const char *p;
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if ((p = relative_path(PGBINDIR, SYSCONFDIR)))
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MAKE_RELATIVE;
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else
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StrNCpy(ret_path, SYSCONFDIR, MAXPGPATH);
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}
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/*
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* get_include_path
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*/
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void
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get_include_path(const char *my_exec_path, char *ret_path)
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{
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char path[MAXPGPATH];
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const char *p;
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if ((p = relative_path(PGBINDIR, INCLUDEDIR)))
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MAKE_RELATIVE;
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else
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StrNCpy(ret_path, INCLUDEDIR, MAXPGPATH);
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}
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/*
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* get_pkginclude_path
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*/
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void
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get_pkginclude_path(const char *my_exec_path, char *ret_path)
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{
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char path[MAXPGPATH];
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const char *p;
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if ((p = relative_path(PGBINDIR, PKGINCLUDEDIR)))
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MAKE_RELATIVE;
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else
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StrNCpy(ret_path, PKGINCLUDEDIR, MAXPGPATH);
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}
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/*
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* get_pkglib_path
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*
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* Return library path, either relative to /bin or hardcoded
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*/
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void
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get_pkglib_path(const char *my_exec_path, char *ret_path)
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{
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char path[MAXPGPATH];
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const char *p;
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if ((p = relative_path(PGBINDIR, PKGLIBDIR)))
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MAKE_RELATIVE;
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else
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StrNCpy(ret_path, PKGLIBDIR, MAXPGPATH);
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}
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/*
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* get_locale_path
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*
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* Return locale path, either relative to /bin or hardcoded
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*/
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void
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get_locale_path(const char *my_exec_path, char *ret_path)
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{
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char path[MAXPGPATH];
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const char *p;
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if ((p = relative_path(PGBINDIR, LOCALEDIR)))
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MAKE_RELATIVE;
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else
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StrNCpy(ret_path, LOCALEDIR, MAXPGPATH);
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}
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/*
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* set_pglocale_pgservice
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*
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* Set application-specific locale and service directory
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*
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* This function takes an argv[0] rather than a full path.
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*/
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void
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set_pglocale_pgservice(const char *argv0, const char *app)
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{
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char path[MAXPGPATH];
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char my_exec_path[MAXPGPATH];
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char env_path[MAXPGPATH + sizeof("PGLOCALEDIR=")]; /* longer than PGSYSCONFDIR */
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/* don't set LC_ALL in the backend */
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if (strcmp(app, "postgres") != 0)
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setlocale(LC_ALL, "");
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if (find_my_exec(argv0, my_exec_path) < 0)
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return;
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#ifdef ENABLE_NLS
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get_locale_path(my_exec_path, path);
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bindtextdomain(app, path);
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textdomain(app);
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if (getenv("PGLOCALEDIR") == NULL)
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{
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/* set for libpq to use */
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snprintf(env_path, sizeof(env_path), "PGLOCALEDIR=%s", path);
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putenv(strdup(env_path));
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}
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#endif
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if (getenv("PGSYSCONFDIR") == NULL)
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{
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get_etc_path(my_exec_path, path);
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/* set for libpq to use */
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snprintf(env_path, sizeof(env_path), "PGSYSCONFDIR=%s", path);
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putenv(strdup(env_path));
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}
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}
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/*
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* relative_path
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*
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* Do the supplied paths differ only in their last component?
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*/
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static const char *
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relative_path(const char *bin_path, const char *other_path)
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{
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const char *other_sep = other_path;
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#ifdef WIN32
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/* Driver letters match? */
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if (isalpha(*bin_path) && bin_path[1] == ':' &&
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(!isalpha(*other_path) || !other_path[1] == ':'))
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return NULL;
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if ((!isalpha(*bin_path) || !bin_path[1] == ':') &&
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(isalpha(*other_path) && other_path[1] == ':'))
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return NULL;
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if (isalpha(*bin_path) && bin_path[1] == ':' &&
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isalpha(*other_path) && other_path[1] == ':')
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{
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if (toupper(*bin_path) != toupper(*other_path))
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return NULL;
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bin_path += 2;
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other_path += 2;
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other_sep = other_path + 1; /* past separator */
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}
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#endif
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while (1)
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{
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/* Move past adjacent slashes like //, and trailing ones */
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MOVE_TO_SEP_END(bin_path);
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MOVE_TO_SEP_END(other_path);
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/* One of the paths is done? */
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if (!*bin_path || !*other_path)
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break;
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/* Win32 filesystem is case insensitive */
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if ((!IS_DIR_SEP(*bin_path) || !IS_DIR_SEP(*other_path)) &&
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#ifndef WIN32
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*bin_path != *other_path
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#else
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toupper((unsigned char) *bin_path) != toupper((unsigned char)*other_path)
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#endif
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)
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break;
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if (IS_DIR_SEP(*other_path))
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other_sep = other_path + 1; /* past separator */
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bin_path++;
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other_path++;
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}
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/* identical? */
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if (!*bin_path && !*other_path)
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return NULL;
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/* advance past directory name */
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while (!IS_DIR_SEP(*bin_path) && *bin_path)
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bin_path++;
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MOVE_TO_SEP_END(bin_path);
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/* Is bin done? */
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if (!*bin_path)
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return other_path;
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else
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return NULL;
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}
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/*
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* trim_directory
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*
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* Trim trailing directory from path
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*/
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static void
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trim_directory(char *path)
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{
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char *p;
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if (path[0] == '\0')
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return;
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for (p = path + strlen(path) - 1; IS_DIR_SEP(*p) && p > path; p--)
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;
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for (; !IS_DIR_SEP(*p) && p > path; p--)
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;
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*p = '\0';
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}
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/*
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* trim_trailing_separator
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*/
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static void
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trim_trailing_separator(char *path)
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{
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char *p = path + strlen(path);
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/* trim off trailing slashes */
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if (p > path)
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for (p--; p > path && IS_DIR_SEP(*p); p--)
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*p = '\0';
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}
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