/* * Taken from Flatpak, last updated: Flatpak 1.6.1 * Copyright © 2019 Red Hat, Inc * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see <http://www.gnu.org/licenses/>. * * Authors: * Alexander Larsson <alexl@redhat.com> */ #include "config.h" #include "flatpak-utils-base-private.h" #include <stdlib.h> #include <string.h> #include <gio/gio.h> #include "libglnx/libglnx.h" /* To keep this more similar to the original file, we explicitly disable * this warning rather than fixing it */ #pragma GCC diagnostic ignored "-Wshadow" char * flatpak_get_timezone (void) { g_autofree gchar *symlink = NULL; gchar *etc_timezone = NULL; const gchar *tzdir; tzdir = getenv ("TZDIR"); if (tzdir == NULL) tzdir = "/usr/share/zoneinfo"; symlink = flatpak_resolve_link ("/etc/localtime", NULL); if (symlink != NULL) { /* Resolve relative path */ g_autofree gchar *canonical = flatpak_canonicalize_filename (symlink); char *canonical_suffix; /* Strip the prefix and slashes if possible. */ if (g_str_has_prefix (canonical, tzdir)) { canonical_suffix = canonical + strlen (tzdir); while (*canonical_suffix == '/') canonical_suffix++; return g_strdup (canonical_suffix); } } if (g_file_get_contents ("/etc/timezone", &etc_timezone, NULL, NULL)) { g_strchomp (etc_timezone); return etc_timezone; } /* Final fall-back is UTC */ return g_strdup ("UTC"); } char * flatpak_readlink (const char *path, GError **error) { return glnx_readlinkat_malloc (-1, path, NULL, error); } char * flatpak_resolve_link (const char *path, GError **error) { g_autofree char *link = flatpak_readlink (path, error); g_autofree char *dirname = NULL; if (link == NULL) return NULL; if (g_path_is_absolute (link)) return g_steal_pointer (&link); dirname = g_path_get_dirname (path); return g_build_filename (dirname, link, NULL); } char * flatpak_canonicalize_filename (const char *path) { g_autoptr(GFile) file = g_file_new_for_path (path); return g_file_get_path (file); } /* There is a dead-lock in glib versions before 2.60 when it closes * the fds. See: https://gitlab.gnome.org/GNOME/glib/merge_requests/490 * This was hitting the test-suite a lot, so we work around it by using * the G_SPAWN_LEAVE_DESCRIPTORS_OPEN/G_SUBPROCESS_FLAGS_INHERIT_FDS flag * and setting CLOEXEC ourselves. */ void flatpak_close_fds_workaround (int start_fd) { int max_open_fds = sysconf (_SC_OPEN_MAX); int fd; for (fd = start_fd; fd < max_open_fds; fd++) fcntl (fd, F_SETFD, FD_CLOEXEC); }