Repair various defects in dc21234005
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pg_combinebackup had various problems: * strncpy was used in various places where strlcpy should be used instead, to avoid any possibility of the result not being \0-terminated. * scan_for_existing_tablespaces() failed to close the directory, and an error when opening the directory was reported with the wrong pathname. * write_reconstructed_file() contained some redundant and therefore dead code. * flush_manifest() didn't check the result of pg_checksum_update() as we do in other places, and misused a local pathname variable that shouldn't exist at all. In pg_basebackup, the wrong variable name was used in one place, due to a copy and paste that was not properly adjusted. In blkreftable.c, the loop incorrectly doubled chunkno instead of max_chunks. Fix that. Also remove a nearby assertion per repeated off-list complaints from Tom Lane. Per Coverity and subsequent code inspection by me and by Tom Lane. Discussion: http://postgr.es/m/CA+Tgmobvqqj-DW9F7uUzT-cQqs6wcVb-Xhs=w=hzJnXSE-kRGw@mail.gmail.com
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@ -709,7 +709,7 @@ StartLogStreamer(char *startpos, uint32 timeline, char *sysidentifier,
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PQserverVersion(conn) < MINIMUM_VERSION_FOR_PG_WAL ?
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"pg_xlog" : "pg_wal");
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if (pg_mkdir_p(statusdir, pg_dir_create_mode) != 0 &&
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if (pg_mkdir_p(summarydir, pg_dir_create_mode) != 0 &&
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errno != EEXIST)
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pg_fatal("could not create directory \"%s\": %m", summarydir);
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}
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@ -773,8 +773,8 @@ process_directory_recursively(Oid tsoid,
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*/
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if (relative_path == NULL)
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{
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strncpy(ifulldir, input_directory, MAXPGPATH);
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strncpy(ofulldir, output_directory, MAXPGPATH);
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strlcpy(ifulldir, input_directory, MAXPGPATH);
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strlcpy(ofulldir, output_directory, MAXPGPATH);
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if (OidIsValid(tsoid))
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snprintf(manifest_prefix, MAXPGPATH, "pg_tblspc/%u/", tsoid);
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else
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@ -855,7 +855,7 @@ process_directory_recursively(Oid tsoid,
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/* Append new pathname component to relative path. */
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if (relative_path == NULL)
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strncpy(new_relative_path, de->d_name, MAXPGPATH);
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strlcpy(new_relative_path, de->d_name, MAXPGPATH);
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else
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snprintf(new_relative_path, MAXPGPATH, "%s/%s", relative_path,
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de->d_name);
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@ -1131,7 +1131,7 @@ scan_for_existing_tablespaces(char *pathname, cb_options *opt)
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pg_log_debug("scanning \"%s\"", pg_tblspc);
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if ((dir = opendir(pg_tblspc)) == NULL)
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pg_fatal("could not open directory \"%s\": %m", pathname);
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pg_fatal("could not open directory \"%s\": %m", pg_tblspc);
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while (errno = 0, (de = readdir(dir)) != NULL)
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{
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@ -1203,8 +1203,8 @@ scan_for_existing_tablespaces(char *pathname, cb_options *opt)
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{
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if (strcmp(tsmap->old_dir, link_target) == 0)
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{
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strncpy(ts->old_dir, tsmap->old_dir, MAXPGPATH);
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strncpy(ts->new_dir, tsmap->new_dir, MAXPGPATH);
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strlcpy(ts->old_dir, tsmap->old_dir, MAXPGPATH);
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strlcpy(ts->new_dir, tsmap->new_dir, MAXPGPATH);
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ts->in_place = false;
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break;
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}
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@ -1238,6 +1238,9 @@ scan_for_existing_tablespaces(char *pathname, cb_options *opt)
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tslist = ts;
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}
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if (closedir(dir) != 0)
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pg_fatal("could not close directory \"%s\": %m", pg_tblspc);
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return tslist;
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}
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@ -577,13 +577,12 @@ write_reconstructed_file(char *input_filename,
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{
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if (current_block == start_of_range)
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appendStringInfo(&debug_buf, " %u:%s@" UINT64_FORMAT,
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current_block,
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s == NULL ? "ZERO" : s->filename,
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current_block, s->filename,
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(uint64) offsetmap[current_block]);
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else
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appendStringInfo(&debug_buf, " %u-%u:%s@" UINT64_FORMAT,
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start_of_range, current_block,
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s == NULL ? "ZERO" : s->filename,
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s->filename,
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(uint64) offsetmap[current_block]);
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}
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@ -241,8 +241,6 @@ escape_json(StringInfo buf, const char *str)
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static void
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flush_manifest(manifest_writer *mwriter)
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{
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char pathname[MAXPGPATH];
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if (mwriter->fd == -1 &&
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(mwriter->fd = open(mwriter->pathname,
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O_WRONLY | O_CREAT | O_EXCL | PG_BINARY,
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@ -260,13 +258,15 @@ flush_manifest(manifest_writer *mwriter)
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pg_fatal("could not write \"%s\": %m", mwriter->pathname);
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else
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pg_fatal("could not write file \"%s\": wrote only %d of %d bytes",
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pathname, (int) wb, mwriter->buf.len);
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mwriter->pathname, (int) wb, mwriter->buf.len);
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}
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if (mwriter->still_checksumming)
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if (mwriter->still_checksumming &&
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pg_checksum_update(&mwriter->manifest_ctx,
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(uint8 *) mwriter->buf.data,
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mwriter->buf.len);
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mwriter->buf.len) < 0)
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pg_fatal("could not update checksum of file \"%s\"",
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mwriter->pathname);
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resetStringInfo(&mwriter->buf);
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}
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}
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@ -988,8 +988,7 @@ BlockRefTableEntryMarkBlockModified(BlockRefTableEntry *entry,
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*/
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max_chunks = Max(16, entry->nchunks);
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while (max_chunks < chunkno + 1)
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chunkno *= 2;
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Assert(max_chunks > chunkno);
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max_chunks *= 2;
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extra_chunks = max_chunks - entry->nchunks;
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if (entry->nchunks == 0)
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