src/update-done/update-done.c

	update-done.c revision 8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4b
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering/***
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  This file is part of systemd.
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  Copyright 2014 Lennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  systemd is free software; you can redistribute it and/or modify it
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  under the terms of the GNU Lesser General Public License as published by
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  the Free Software Foundation; either version 2.1 of the License, or
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  (at your option) any later version.
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  systemd is distributed in the hope that it will be useful, but
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  WITHOUT ANY WARRANTY; without even the implied warranty of
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  Lesser General Public License for more details.
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  You should have received a copy of the GNU Lesser General Public License
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering  along with systemd; If not, see <http://www.gnu.org/licenses/>.
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering***/
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering#include "util.h"
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poetteringstatic int apply_timestamp(const char *path, struct timespec *ts) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        struct timespec twice[2];
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        struct stat st;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        assert(path);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        assert(ts);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        if (stat(path, &st) >= 0) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                /* Is the timestamp file already newer than the OS? If so, there's nothing to do. */
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                if (st.st_mtim.tv_sec > ts->tv_sec ||
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                    (st.st_mtim.tv_sec == ts->tv_sec && st.st_mtim.tv_nsec >= ts->tv_nsec))
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        return 0;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                /* It is older? Then let's update it */
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                twice[0] = *ts;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                twice[1] = *ts;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                if (utimensat(AT_FDCWD, path, twice, AT_SYMLINK_NOFOLLOW) < 0) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        if (errno == EROFS) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                                log_debug("Can't update timestamp file %s, file system is read-only.", path);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                                return 0;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        }
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        log_error("Failed to update timestamp on %s: %m", path);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        return -errno;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                }
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        } else if (errno == ENOENT) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                _cleanup_close_ int fd = -1;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                /* The timestamp file doesn't exist yet? Then let's create it. */
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                fd = open(path, O_CREAT|O_EXCL|O_WRONLY|O_TRUNC|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0644);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                if (fd < 0) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        if (errno == EROFS) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                                log_debug("Can't create timestamp file %s, file system is read-only.", path);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                                return 0;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        }
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        log_error("Failed to create timestamp file %s: %m", path);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        return -errno;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                }
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                twice[0] = *ts;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                twice[1] = *ts;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                if (futimens(fd, twice) < 0) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        log_error("Failed to update timestamp on %s: %m", path);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                        return -errno;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                }
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        } else {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                log_error("Failed to stat() timestamp file %s: %m", path);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                return -errno;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        }
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        return 0;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering}
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poetteringint main(int argc, char *argv[]) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        struct stat st;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        int r, q;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        log_set_target(LOG_TARGET_AUTO);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        log_parse_environment();
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        log_open();
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        if (stat("/usr", &st) < 0) {
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                log_error("Failed to stat /usr: %m");
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                return EXIT_FAILURE;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        }
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        r = apply_timestamp("/etc/.updated", &st.st_mtim);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        q = apply_timestamp("/var/.updated", &st.st_mtim);
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        if (q < 0 && r == 0)
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering                r = q;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
8ea48dfcd33e8db0c01bf8c57c3bbcfdc3c86d4bLennart Poettering}