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- /*
- * dpkg-statoverride - override ownership and mode of files
- *
- * Copyright © 2000, 2001 Wichert Akkerman <wakkerma@debian.org>
- * Copyright © 2006-2015 Guillem Jover <guillem@debian.org>
- *
- * This 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 of the License, or
- * (at your option) any later version.
- *
- * This 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/>.
- *
- */
- #include <config.h>
- #include <compat.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <errno.h>
- #if HAVE_LOCALE_H
- #include <locale.h>
- #endif
- #include <string.h>
- #include <grp.h>
- #include <pwd.h>
- #include <fnmatch.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <dpkg/i18n.h>
- #include <dpkg/dpkg.h>
- #include <dpkg/dpkg-db.h>
- #include <dpkg/path.h>
- #include <dpkg/dir.h>
- #include <dpkg/glob.h>
- #include <dpkg/options.h>
- #include "main.h"
- #include "filesdb.h"
- static const char printforhelp[] = N_(
- "Use --help for help about overriding file stat information.");
- static void DPKG_ATTR_NORET
- printversion(const struct cmdinfo *cip, const char *value)
- {
- printf(_("Debian %s version %s.\n"), dpkg_get_progname(),
- DPKG_VERSION_ARCH);
- printf(_(
- "This is free software; see the GNU General Public License version 2 or\n"
- "later for copying conditions. There is NO warranty.\n"));
- m_output(stdout, _("<standard output>"));
- exit(0);
- }
- static void DPKG_ATTR_NORET
- usage(const struct cmdinfo *cip, const char *value)
- {
- printf(_(
- "Usage: %s [<option> ...] <command>\n"
- "\n"), dpkg_get_progname());
- printf(_(
- "Commands:\n"
- " --add <owner> <group> <mode> <path>\n"
- " add a new <path> entry into the database.\n"
- " --remove <path> remove <path> from the database.\n"
- " --list [<glob-pattern>] list current overrides in the database.\n"
- "\n"));
- printf(_(
- "Options:\n"
- " --admindir <directory> set the directory with the statoverride file.\n"
- " --update immediately update <path> permissions.\n"
- " --force force an action even if a sanity check fails.\n"
- " --quiet quiet operation, minimal output.\n"
- " --help show this help message.\n"
- " --version show the version.\n"
- "\n"));
- m_output(stdout, _("<standard output>"));
- exit(0);
- }
- static const char *admindir;
- static int opt_verbose = 1;
- static int opt_force = 0;
- static int opt_update = 0;
- static char *
- path_cleanup(const char *path)
- {
- char *new_path = m_strdup(path);
- path_trim_slash_slashdot(new_path);
- if (opt_verbose && strcmp(path, new_path) != 0)
- warning(_("stripping trailing /"));
- return new_path;
- }
- static struct file_stat *
- statdb_node_new(const char *user, const char *group, const char *mode)
- {
- struct file_stat *filestat;
- filestat = nfmalloc(sizeof(*filestat));
- filestat->uid = statdb_parse_uid(user);
- if (filestat->uid == (uid_t)-1)
- ohshit(_("user '%s' does not exist"), user);
- filestat->uname = NULL;
- filestat->gid = statdb_parse_gid(group);
- if (filestat->gid == (gid_t)-1)
- ohshit(_("group '%s' does not exist"), group);
- filestat->gname = NULL;
- filestat->mode = statdb_parse_mode(mode);
- return filestat;
- }
- static struct file_stat **
- statdb_node_find(const char *filename)
- {
- struct filenamenode *file;
- file = findnamenode(filename, 0);
- return &file->statoverride;
- }
- static int
- statdb_node_remove(const char *filename)
- {
- struct filenamenode *file;
- file = findnamenode(filename, fnn_nonew);
- if (!file || (file && !file->statoverride))
- return 0;
- file->statoverride = NULL;
- return 1;
- }
- static void
- statdb_node_apply(const char *filename, struct file_stat *filestat)
- {
- if (chown(filename, filestat->uid, filestat->gid) < 0)
- ohshite(_("error setting ownership of '%.255s'"), filename);
- if (chmod(filename, filestat->mode))
- ohshite(_("error setting permissions of '%.255s'"), filename);
- dpkg_selabel_load();
- dpkg_selabel_set_context(filename, filename, filestat->mode);
- dpkg_selabel_close();
- }
- static void
- statdb_node_print(FILE *out, struct filenamenode *file)
- {
- struct file_stat *filestat = file->statoverride;
- struct passwd *pw;
- struct group *gr;
- if (!filestat)
- return;
- pw = getpwuid(filestat->uid);
- if (pw)
- fprintf(out, "%s ", pw->pw_name);
- else if (filestat->uname)
- fprintf(out, "%s ", filestat->uname);
- else
- fprintf(out, "#%d ", filestat->uid);
- gr = getgrgid(filestat->gid);
- if (gr)
- fprintf(out, "%s ", gr->gr_name);
- else if (filestat->gname)
- fprintf(out, "%s ", filestat->gname);
- else
- fprintf(out, "#%d ", filestat->gid);
- fprintf(out, "%o %s\n", filestat->mode, file->name);
- }
- static void
- statdb_write(void)
- {
- char *dbname;
- struct atomic_file *dbfile;
- struct fileiterator *iter;
- struct filenamenode *file;
- dbname = dpkg_db_get_path(STATOVERRIDEFILE);
- dbfile = atomic_file_new(dbname, ATOMIC_FILE_BACKUP);
- atomic_file_open(dbfile);
- iter = files_db_iter_new();
- while ((file = files_db_iter_next(iter)))
- statdb_node_print(dbfile->fp, file);
- files_db_iter_free(iter);
- atomic_file_sync(dbfile);
- atomic_file_close(dbfile);
- atomic_file_commit(dbfile);
- atomic_file_free(dbfile);
- dir_sync_path(dpkg_db_get_dir());
- free(dbname);
- }
- static int
- statoverride_add(const char *const *argv)
- {
- const char *user = argv[0];
- const char *group = argv[1];
- const char *mode = argv[2];
- const char *path = argv[3];
- char *filename;
- struct file_stat **filestat;
- if (!user || !group || !mode || !path || argv[4])
- badusage(_("--%s needs four arguments"), cipaction->olong);
- if (strchr(path, '\n'))
- badusage(_("path may not contain newlines"));
- filename = path_cleanup(path);
- filestat = statdb_node_find(filename);
- if (*filestat != NULL) {
- if (opt_force)
- warning(_("an override for '%s' already exists, "
- "but --force specified so will be ignored"),
- filename);
- else
- ohshit(_("an override for '%s' already exists; "
- "aborting"), filename);
- }
- *filestat = statdb_node_new(user, group, mode);
- if (opt_update) {
- struct stat st;
- if (stat(filename, &st) == 0)
- statdb_node_apply(filename, *filestat);
- else if (opt_verbose)
- warning(_("--update given but %s does not exist"),
- filename);
- }
- statdb_write();
- free(filename);
- return 0;
- }
- static int
- statoverride_remove(const char *const *argv)
- {
- const char *path = argv[0];
- char *filename;
- if (!path || argv[1])
- badusage(_("--%s needs a single argument"), "remove");
- filename = path_cleanup(path);
- if (!statdb_node_remove(filename)) {
- if (opt_verbose)
- warning(_("no override present"));
- if (opt_force)
- return 0;
- else
- return 2;
- }
- if (opt_update && opt_verbose)
- warning(_("--update is useless for --remove"));
- statdb_write();
- free(filename);
- return 0;
- }
- static int
- statoverride_list(const char *const *argv)
- {
- struct fileiterator *iter;
- struct filenamenode *file;
- const char *thisarg;
- struct glob_node *glob_list = NULL;
- int ret = 1;
- while ((thisarg = *argv++)) {
- char *pattern = path_cleanup(thisarg);
- glob_list_prepend(&glob_list, pattern);
- }
- if (glob_list == NULL)
- glob_list_prepend(&glob_list, m_strdup("*"));
- iter = files_db_iter_new();
- while ((file = files_db_iter_next(iter))) {
- struct glob_node *g;
- for (g = glob_list; g; g = g->next) {
- if (fnmatch(g->pattern, file->name, 0) == 0) {
- statdb_node_print(stdout, file);
- ret = 0;
- break;
- }
- }
- }
- files_db_iter_free(iter);
- glob_list_free(glob_list);
- return ret;
- }
- static const struct cmdinfo cmdinfos[] = {
- ACTION("add", 0, act_install, statoverride_add),
- ACTION("remove", 0, act_remove, statoverride_remove),
- ACTION("list", 0, act_listfiles, statoverride_list),
- { "admindir", 0, 1, NULL, &admindir, NULL },
- { "quiet", 0, 0, &opt_verbose, NULL, NULL, 0 },
- { "force", 0, 0, &opt_force, NULL, NULL, 1 },
- { "update", 0, 0, &opt_update, NULL, NULL, 1 },
- { "help", '?', 0, NULL, NULL, usage },
- { "version", 0, 0, NULL, NULL, printversion },
- { NULL, 0 }
- };
- int
- main(int argc, const char *const *argv)
- {
- int ret;
- dpkg_locales_init(PACKAGE);
- dpkg_program_init("dpkg-statoverride");
- dpkg_options_parse(&argv, cmdinfos, printforhelp);
- admindir = dpkg_db_set_dir(admindir);
- if (!cipaction)
- badusage(_("need an action option"));
- filesdbinit();
- ensure_statoverrides(STATDB_PARSE_LAX);
- ret = cipaction->action(argv);
- dpkg_program_done();
- return ret;
- }
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