| /*-*- 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" |
| #include "fileio.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; |
| |
| r = read_one_line_file("/proc/cmdline", &line); |
| if (r < 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")) |
| log_warning("Invalid fsck parameter. Ignoring."); |
| #ifdef HAVE_SYSV_COMPAT |
| else if (strneq(w, "fastboot", l)) { |
| log_error("Please pass 'fsck.mode=skip' rather than 'fastboot' on the kernel command line."); |
| arg_skip = true; |
| } else if (strneq(w, "forcefsck", l)) { |
| log_error("Please pass 'fsck.mode=force' rather than 'forcefsck' on the kernel command line."); |
| arg_force = true; |
| } |
| #endif |
| } |
| |
| free(line); |
| return 0; |
| } |
| |
| static void test_files(void) { |
| #ifdef HAVE_SYSV_COMPAT |
| if (access("/fastboot", F_OK) >= 0) { |
| log_error("Please pass 'fsck.mode=skip' on the kernel command line rather than creating /fastboot on the root file system."); |
| arg_skip = true; |
| } |
| |
| if (access("/forcefsck", F_OK) >= 0) { |
| log_error("Please pass 'fsck.mode=force' on the kernel command line rather than creating /forcefsck on the root file system."); |
| arg_force = true; |
| } |
| #endif |
| |
| 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_oom(); |
| 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; |
| } |