summaryrefslogtreecommitdiff
path: root/src/fsck
diff options
context:
space:
mode:
Diffstat (limited to 'src/fsck')
-rw-r--r--src/fsck/fsck.c406
1 files changed, 406 insertions, 0 deletions
diff --git a/src/fsck/fsck.c b/src/fsck/fsck.c
new file mode 100644
index 0000000000..f25ec49442
--- /dev/null
+++ b/src/fsck/fsck.c
@@ -0,0 +1,406 @@
+/*-*- 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 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.
+
+ 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser 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 <sys/file.h>
+
+#include <libudev.h>
+#include <dbus/dbus.h>
+
+#include "util.h"
+#include "dbus-common.h"
+#include "special.h"
+#include "bus-errors.h"
+#include "virt.h"
+
+static bool arg_skip = false;
+static bool arg_force = false;
+static bool arg_show_progress = 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 warning 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 (detect_container(NULL) > 0)
+ return 0;
+
+ 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) || defined(TARGET_MAGEIA)
+ 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;
+
+ if (access("/run/systemd/show-status", F_OK) >= 0 || plymouth_running())
+ arg_show_progress = true;
+}
+
+static double percent(int pass, unsigned long cur, unsigned long max) {
+ /* Values stolen from e2fsck */
+
+ static const int pass_table[] = {
+ 0, 70, 90, 92, 95, 100
+ };
+
+ if (pass <= 0)
+ return 0.0;
+
+ if ((unsigned) pass >= ELEMENTSOF(pass_table) || max == 0)
+ return 100.0;
+
+ return (double) pass_table[pass-1] +
+ ((double) pass_table[pass] - (double) pass_table[pass-1]) *
+ (double) cur / (double) max;
+}
+
+static int process_progress(int fd) {
+ FILE *f, *console;
+ usec_t last = 0;
+ bool locked = false;
+ int clear = 0;
+
+ f = fdopen(fd, "r");
+ if (!f) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ console = fopen("/dev/console", "w");
+ if (!console) {
+ fclose(f);
+ return -ENOMEM;
+ }
+
+ while (!feof(f)) {
+ int pass, m;
+ unsigned long cur, max;
+ char *device;
+ double p;
+ usec_t t;
+
+ if (fscanf(f, "%i %lu %lu %ms", &pass, &cur, &max, &device) != 4)
+ break;
+
+ /* Only show one progress counter at max */
+ if (!locked) {
+ if (flock(fileno(console), LOCK_EX|LOCK_NB) < 0) {
+ free(device);
+ continue;
+ }
+
+ locked = true;
+ }
+
+ /* Only update once every 50ms */
+ t = now(CLOCK_MONOTONIC);
+ if (last + 50 * USEC_PER_MSEC > t) {
+ free(device);
+ continue;
+ }
+
+ last = t;
+
+ p = percent(pass, cur, max);
+ fprintf(console, "\r%s: fsck %3.1f%% complete...\r%n", device, p, &m);
+ fflush(console);
+
+ free(device);
+
+ if (m > clear)
+ clear = m;
+ }
+
+ if (clear > 0) {
+ unsigned j;
+
+ fputc('\r', console);
+ for (j = 0; j < (unsigned) clear; j++)
+ fputc(' ', console);
+ fputc('\r', console);
+ fflush(console);
+ }
+
+ fclose(f);
+ fclose(console);
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ const char *cmdline[9];
+ 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;
+ int progress_pipe[2] = { -1, -1 };
+ char dash_c[2+10+1];
+
+ 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);
+
+ 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;
+ }
+
+ if (arg_show_progress)
+ if (pipe(progress_pipe) < 0) {
+ log_error("pipe(): %m");
+ goto finish;
+ }
+
+ 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";
+
+ 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("fork(): %m");
+ goto finish;
+ } else if (pid == 0) {
+ /* Child */
+ if (progress_pipe[0] >= 0)
+ close_nointr_nofail(progress_pipe[0]);
+ execv(cmdline[0], (char**) cmdline);
+ _exit(8); /* Operational error */
+ }
+
+ if (progress_pipe[1] >= 0) {
+ close_nointr_nofail(progress_pipe[1]);
+ progress_pipe[1] = -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("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("/run/systemd/quotacheck");
+
+finish:
+ if (udev_device)
+ udev_device_unref(udev_device);
+
+ if (udev)
+ udev_unref(udev);
+
+ close_pipe(progress_pipe);
+
+ return r;
+}