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107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2020 Igor V. Kovalenko <igor.v.kovalenko@gmail.com>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <errno.h>
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#include <dirent.h>
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#include <pulse/xmalloc.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/log.h>
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#include "database.h"
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#include "core-error.h"
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pa_database* pa_database_open(const char *path, const char *fn, bool prependmid, bool for_write) {
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const char *filename_suffix = pa_database_get_filename_suffix();
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char *machine_id = NULL, *filename_prefix, *full_path;
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DIR *database_dir = NULL;
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struct dirent *de;
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pa_database *f;
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pa_assert(filename_suffix && filename_suffix[0]);
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if (prependmid && !(machine_id = pa_machine_id())) {
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return NULL;
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}
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/* Database file name starts with ${machine_id}-${fn} */
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if (machine_id)
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filename_prefix = pa_sprintf_malloc("%s-%s", machine_id, fn);
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else
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filename_prefix = pa_xstrdup(fn);
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/* Search for existing database directory entry name matching architecture suffix and filename suffix. */
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database_dir = opendir(path);
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if (database_dir) {
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for (;;) {
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errno = 0;
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de = readdir(database_dir);
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if (!de) {
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if (errno) {
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pa_log_warn("Unable to search for existing database file, readdir() failed: %s", pa_cstrerror(errno));
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/* can continue as if there is no matching database file candidate */
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}
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break;
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}
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if (pa_startswith(de->d_name, filename_prefix)
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&& de->d_name[strlen(filename_prefix)] == '.'
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&& pa_endswith(de->d_name + strlen(filename_prefix) + 1, filename_suffix)) {
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/* candidate filename found, replace filename_prefix with this one */
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pa_log_debug("Found existing database file '%s/%s', using it", path, de->d_name);
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pa_xfree(filename_prefix);
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filename_prefix = pa_xstrndup(de->d_name, strlen(de->d_name) - strlen(filename_suffix));
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break;
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}
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}
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closedir(database_dir);
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} else {
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pa_log_warn("Unable to search for existing database file, failed to open directory %s: %s", path, pa_cstrerror(errno));
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}
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full_path = pa_sprintf_malloc("%s" PA_PATH_SEP "%s%s", path, filename_prefix, filename_suffix);
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f = pa_database_open_internal(full_path, for_write);
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if (f)
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pa_log_info("Successfully opened '%s' database file '%s'.", fn, full_path);
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else
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pa_log("Failed to open '%s' database file '%s': %s", fn, full_path, pa_cstrerror(errno));
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pa_xfree(full_path);
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pa_xfree(filename_prefix);
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/* deallocate machine_id if it was used to construct file name */
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pa_xfree(machine_id);
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return f;
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}
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