int main(int argc, char *argv[]) {
const char *cmdline[9];
int i = 0, r = EXIT_FAILURE, q;
pid_t pid;
siginfo_t status;
_cleanup_udev_unref_ struct udev *udev = NULL;
_cleanup_udev_device_unref_ struct udev_device *udev_device = NULL;
const char *device, *type;
bool root_directory;
int progress_pipe[2] = { -1, -1 };
char dash_c[2+10+1];
struct stat st;
if (argc > 2) {
log_error("This program expects one or no arguments.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
q = parse_proc_cmdline(parse_proc_cmdline_item);
if (q < 0)
log_warning_errno(q, "Failed to parse kernel command line, ignoring: %m");
test_files();
if (!arg_force && arg_skip)
return 0;
udev = udev_new();
if (!udev) {
log_oom();
return EXIT_FAILURE;
}
if (argc > 1) {
device = argv[1];
root_directory = false;
if (stat(device, &st) < 0) {
log_error_errno(errno, "Failed to stat '%s': %m", device);
return EXIT_FAILURE;
}
udev_device = udev_device_new_from_devnum(udev, 'b', st.st_rdev);
if (!udev_device) {
log_error("Failed to detect device %s", device);
return EXIT_FAILURE;
}
} else {
struct timespec times[2];
/* Find root device */
if (stat("/", &st) < 0) {
log_error_errno(errno, "Failed to stat() the root directory: %m");
return EXIT_FAILURE;
}
/* Virtual root devices don't need an fsck */
if (major(st.st_dev) == 0)
return EXIT_SUCCESS;
/* 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 EXIT_SUCCESS;
}
udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev);
if (!udev_device) {
log_error("Failed to detect root device.");
return EXIT_FAILURE;
}
device = udev_device_get_devnode(udev_device);
if (!device) {
log_error("Failed to detect device node of root directory.");
return EXIT_FAILURE;
}
root_directory = true;
}
type = udev_device_get_property_value(udev_device, "ID_FS_TYPE");
if (type) {
r = fsck_exists(type);
if (r == -ENOENT) {
log_info("fsck.%s doesn't exist, not checking file system on %s", type, device);
return EXIT_SUCCESS;
} else if (r < 0)
log_warning_errno(r, "fsck.%s cannot be used for %s: %m", type, device);
}
if (arg_show_progress)
if (pipe(progress_pipe) < 0) {
log_error_errno(errno, "pipe(): %m");
return EXIT_FAILURE;
}
cmdline[i++] = "/sbin/fsck";
cmdline[i++] = arg_repair;
cmdline[i++] = "-T";
/*
* Since util-linux v2.25 fsck uses /run/fsck/<diskname>.lock files.
* The previous versions use flock for the device and conflict with
* udevd, see https://bugs.freedesktop.org/show_bug.cgi?id=79576#c5
*/
cmdline[i++] = "-l";
if (!root_directory)
cmdline[i++] = "-M";
if (arg_force)
cmdline[i++] = "-f";
if (progress_pipe[1] >= 0) {
snprintf(dash_c, sizeof(dash_c), "-C%i", progress_pipe[1]);
char_array_0(dash_c);
cmdline[i++] = dash_c;
}
cmdline[i++] = device;
cmdline[i++] = NULL;
pid = fork();
if (pid < 0) {
log_error_errno(errno, "fork(): %m");
goto finish;
} else if (pid == 0) {
/* Child */
if (progress_pipe[0] >= 0)
safe_close(progress_pipe[0]);
execv(cmdline[0], (char**) cmdline);
_exit(8); /* Operational error */
}
progress_pipe[1] = safe_close(progress_pipe[1]);
if (progress_pipe[0] >= 0) {
process_progress(progress_pipe[0]);
progress_pipe[0] = -1;
}
q = wait_for_terminate(pid, &status);
if (q < 0) {
log_error_errno(q, "waitid(): %m");
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);
else if (status.si_code == CLD_EXITED && (status.si_status & 6))
/* Some other problem */
start_target(SPECIAL_EMERGENCY_TARGET);
else {
r = EXIT_SUCCESS;
log_warning("Ignoring error.");
}
} else
r = EXIT_SUCCESS;
if (status.si_code == CLD_EXITED && (status.si_status & 1))
touch("/run/systemd/quotacheck");
finish:
safe_close_pair(progress_pipe);
return r;
}
static int fsck_progress_socket(void) {
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/fsck.progress",
};
int fd, r;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0)
return log_warning_errno(errno, "socket(): %m");
if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
r = log_full_errno(errno == ECONNREFUSED || errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
errno, "Failed to connect to progress socket %s, ignoring: %m", sa.un.sun_path);
safe_close(fd);
return r;
}
return fd;
}
int main(int argc, char *argv[]) {
_cleanup_close_pair_ int progress_pipe[2] = { -1, -1 };
_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
const char *device, *type;
bool root_directory;
siginfo_t status;
struct stat st;
int r;
pid_t pid;
if (argc > 2) {
log_error("This program expects one or no arguments.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
r = parse_proc_cmdline(parse_proc_cmdline_item);
if (r < 0)
log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
test_files();
if (!arg_force && arg_skip) {
r = 0;
goto finish;
}
if (argc > 1) {
device = argv[1];
if (stat(device, &st) < 0) {
r = log_error_errno(errno, "Failed to stat %s: %m", device);
goto finish;
}
if (!S_ISBLK(st.st_mode)) {
log_error("%s is not a block device.", device);
r = -EINVAL;
goto finish;
}
r = sd_device_new_from_devnum(&dev, 'b', st.st_rdev);
if (r < 0) {
log_error_errno(r, "Failed to detect device %s: %m", device);
goto finish;
}
root_directory = false;
} else {
struct timespec times[2];
/* Find root device */
if (stat("/", &st) < 0) {
r = log_error_errno(errno, "Failed to stat() the root directory: %m");
goto finish;
}
/* Virtual root devices don't need an fsck */
if (major(st.st_dev) == 0) {
log_debug("Root directory is virtual or btrfs, skipping check.");
r = 0;
goto finish;
}
/* 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.");
r = 0;
goto finish;
}
r = sd_device_new_from_devnum(&dev, 'b', st.st_dev);
if (r < 0) {
log_error_errno(r, "Failed to detect root device: %m");
goto finish;
}
r = sd_device_get_devname(dev, &device);
if (r < 0) {
log_error_errno(r, "Failed to detect device node of root directory: %m");
goto finish;
}
root_directory = true;
}
r = sd_device_get_property_value(dev, "ID_FS_TYPE", &type);
if (r >= 0) {
r = fsck_exists(type);
if (r < 0)
log_warning_errno(r, "Couldn't detect if fsck.%s may be used for %s, proceeding: %m", type, device);
else if (r == 0) {
log_info("fsck.%s doesn't exist, not checking file system on %s.", type, device);
goto finish;
}
}
if (arg_show_progress) {
if (pipe(progress_pipe) < 0) {
r = log_error_errno(errno, "pipe(): %m");
goto finish;
}
}
pid = fork();
if (pid < 0) {
r = log_error_errno(errno, "fork(): %m");
goto finish;
}
if (pid == 0) {
char dash_c[sizeof("-C")-1 + DECIMAL_STR_MAX(int) + 1];
int progress_socket = -1;
const char *cmdline[9];
int i = 0;
/* Child */
(void) reset_all_signal_handlers();
(void) reset_signal_mask();
assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
/* Close the reading side of the progress pipe */
progress_pipe[0] = safe_close(progress_pipe[0]);
/* Try to connect to a progress management daemon, if there is one */
progress_socket = fsck_progress_socket();
if (progress_socket >= 0) {
/* If this worked we close the progress pipe early, and just use the socket */
progress_pipe[1] = safe_close(progress_pipe[1]);
xsprintf(dash_c, "-C%i", progress_socket);
} else if (progress_pipe[1] >= 0) {
/* Otherwise if we have the progress pipe to our own local handle, we use it */
xsprintf(dash_c, "-C%i", progress_pipe[1]);
} else
dash_c[0] = 0;
cmdline[i++] = "/sbin/fsck";
cmdline[i++] = arg_repair;
cmdline[i++] = "-T";
/*
* Since util-linux v2.25 fsck uses /run/fsck/<diskname>.lock files.
* The previous versions use flock for the device and conflict with
* udevd, see https://bugs.freedesktop.org/show_bug.cgi?id=79576#c5
*/
cmdline[i++] = "-l";
if (!root_directory)
cmdline[i++] = "-M";
if (arg_force)
cmdline[i++] = "-f";
if (!isempty(dash_c))
cmdline[i++] = dash_c;
cmdline[i++] = device;
cmdline[i++] = NULL;
execv(cmdline[0], (char**) cmdline);
_exit(FSCK_OPERATIONAL_ERROR);
}
progress_pipe[1] = safe_close(progress_pipe[1]);
(void) process_progress(progress_pipe[0]);
progress_pipe[0] = -1;
r = wait_for_terminate(pid, &status);
if (r < 0) {
log_error_errno(r, "waitid(): %m");
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.");
r = -EINVAL;
if (status.si_code == CLD_EXITED && (status.si_status & FSCK_SYSTEM_SHOULD_REBOOT) && root_directory)
/* System should be rebooted. */
start_target(SPECIAL_REBOOT_TARGET, "replace-irreversibly");
else if (status.si_code == CLD_EXITED && (status.si_status & (FSCK_SYSTEM_SHOULD_REBOOT | FSCK_ERRORS_LEFT_UNCORRECTED)))
/* Some other problem */
start_target(SPECIAL_EMERGENCY_TARGET, "replace");
else {
log_warning("Ignoring error.");
r = 0;
}
} else
r = 0;
if (status.si_code == CLD_EXITED && (status.si_status & FSCK_ERROR_CORRECTED))
(void) touch("/run/systemd/quotacheck");
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
int generator_write_fsck_deps(
FILE *f,
const char *dir,
const char *what,
const char *where,
const char *fstype) {
int r;
assert(f);
assert(dir);
assert(what);
assert(where);
if (!is_device_path(what)) {
log_warning("Checking was requested for \"%s\", but it is not a device.", what);
return 0;
}
if (!isempty(fstype) && !streq(fstype, "auto")) {
r = fsck_exists(fstype);
if (r < 0)
log_warning_errno(r, "Checking was requested for %s, but couldn't detect if fsck.%s may be used, proceeding: %m", what, fstype);
else if (r == 0) {
/* treat missing check as essentially OK */
log_debug("Checking was requested for %s, but fsck.%s does not exist.", what, fstype);
return 0;
}
}
if (path_equal(where, "/")) {
const char *lnk;
lnk = strjoina(dir, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service");
mkdir_parents(lnk, 0755);
if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-fsck-root.service", lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
} else {
_cleanup_free_ char *_fsck = NULL;
const char *fsck;
if (in_initrd() && path_equal(where, "/sysroot")) {
r = write_fsck_sysroot_service(dir, what);
if (r < 0)
return r;
fsck = "systemd-fsck-root.service";
} else {
r = unit_name_from_path_instance("systemd-fsck", what, ".service", &_fsck);
if (r < 0)
return log_error_errno(r, "Failed to create fsck service name: %m");
fsck = _fsck;
}
fprintf(f,
"Requires=%1$s\n"
"After=%1$s\n",
fsck);
}
return 0;
}