fsck.c revision 1de4d79bf554946f486adf56ed765c5335816f15
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd 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.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <libudev.h>
#include <dbus/dbus.h>
#include "util.h"
#include "dbus-common.h"
#include "special.h"
#include "bus-errors.h"
static bool arg_skip = false;
static bool arg_force = false;
static void start_target(const char *target, bool isolate) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
const char *mode, *basic_target = "basic.target";
DBusConnection *bus = NULL;
assert(target);
dbus_error_init(&error);
if (bus_connect(DBUS_BUS_SYSTEM, &bus, NULL, &error) < 0) {
log_error("Failed to get D-Bus connection: %s", bus_error_message(&error));
goto finish;
}
if (isolate)
mode = "isolate";
else
mode = "replace";
log_info("Running request %s/start/%s", target, mode);
if (!(m = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnitReplace"))) {
log_error("Could not allocate message.");
goto finish;
}
/* Start these units only if we can replace base.target with it */
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &basic_target,
DBUS_TYPE_STRING, &target,
DBUS_TYPE_STRING, &mode,
DBUS_TYPE_INVALID)) {
log_error("Could not attach target and flag information to message.");
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
/* Don't print a waring if we aren't called during
* startup */
if (!dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_JOB))
log_error("Failed to start unit: %s", bus_error_message(&error));
goto finish;
}
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
if (bus) {
dbus_connection_flush(bus);
dbus_connection_close(bus);
dbus_connection_unref(bus);
}
dbus_error_free(&error);
}
static int parse_proc_cmdline(void) {
char *line, *w, *state;
int r;
size_t l;
if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
return 0;
}
FOREACH_WORD_QUOTED(w, l, line, state) {
if (strneq(w, "fsck.mode=auto", l))
arg_force = arg_skip = false;
else if (strneq(w, "fsck.mode=force", l))
arg_force = true;
else if (strneq(w, "fsck.mode=skip", l))
arg_skip = true;
else if (startswith(w, "fsck.mode"))
log_warning("Invalid fsck.mode= parameter. Ignoring.");
#if defined(TARGET_FEDORA) || defined(TARGET_MANDRIVA)
else if (strneq(w, "fastboot", l))
arg_skip = true;
else if (strneq(w, "forcefsck", l))
arg_force = true;
#endif
}
free(line);
return 0;
}
static void test_files(void) {
if (access("/fastboot", F_OK) >= 0)
arg_skip = true;
if (access("/forcefsck", F_OK) >= 0)
arg_force = true;
}
int main(int argc, char *argv[]) {
const char *cmdline[8];
int i = 0, r = EXIT_FAILURE, q;
pid_t pid;
siginfo_t status;
struct udev *udev = NULL;
struct udev_device *udev_device = NULL;
const char *device;
bool root_directory;
if (argc > 2) {
log_error("This program expects one or no arguments.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_open();
parse_proc_cmdline();
test_files();
if (!arg_force && arg_skip)
return 0;
if (argc > 1) {
device = argv[1];
root_directory = false;
} else {
struct stat st;
struct timespec times[2];
/* Find root device */
if (stat("/", &st) < 0) {
log_error("Failed to stat() the root directory: %m");
goto finish;
}
/* Virtual root devices don't need an fsck */
if (major(st.st_dev) == 0)
return 0;
/* check if we are already writable */
times[0] = st.st_atim;
times[1] = st.st_mtim;
if (utimensat(AT_FDCWD, "/", times, 0) == 0) {
log_info("Root directory is writable, skipping check.");
return 0;
}
if (!(udev = udev_new())) {
log_error("Out of memory");
goto finish;
}
if (!(udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev))) {
log_error("Failed to detect root device.");
goto finish;
}
if (!(device = udev_device_get_devnode(udev_device))) {
log_error("Failed to detect device node of root directory.");
goto finish;
}
root_directory = true;
}
cmdline[i++] = "/sbin/fsck";
cmdline[i++] = "-a";
cmdline[i++] = "-T";
cmdline[i++] = "-l";
if (!root_directory)
cmdline[i++] = "-M";
if (arg_force)
cmdline[i++] = "-f";
cmdline[i++] = device;
cmdline[i++] = NULL;
if ((pid = fork()) < 0) {
log_error("fork(): %m");
goto finish;
} else if (pid == 0) {
/* Child */
execv(cmdline[0], (char**) cmdline);
_exit(8); /* Operational error */
}
if ((q = wait_for_terminate(pid, &status)) < 0) {
log_error("waitid(): %s", strerror(-q));
goto finish;
}
if (status.si_code != CLD_EXITED || (status.si_status & ~1)) {
if (status.si_code == CLD_KILLED || status.si_code == CLD_DUMPED)
log_error("fsck terminated by signal %s.", signal_to_string(status.si_status));
else if (status.si_code == CLD_EXITED)
log_error("fsck failed with error code %i.", status.si_status);
else
log_error("fsck failed due to unknown reason.");
if (status.si_code == CLD_EXITED && (status.si_status & 2) && root_directory)
/* System should be rebooted. */
start_target(SPECIAL_REBOOT_TARGET, false);
else if (status.si_code == CLD_EXITED && (status.si_status & 6))
/* Some other problem */
start_target(SPECIAL_EMERGENCY_TARGET, true);
else {
r = EXIT_SUCCESS;
log_warning("Ignoring error.");
}
} else
r = EXIT_SUCCESS;
if (status.si_code == CLD_EXITED && (status.si_status & 1))
touch("/dev/.systemd/quotacheck");
finish:
if (udev_device)
udev_device_unref(udev_device);
if (udev)
udev_unref(udev);
return r;
}