diff options
Diffstat (limited to 'src/fsck/fsck.c')
| -rw-r--r-- | src/fsck/fsck.c | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/src/fsck/fsck.c b/src/fsck/fsck.c new file mode 100644 index 0000000000..058f34d64f --- /dev/null +++ b/src/fsck/fsck.c @@ -0,0 +1,407 @@ +/*-*- 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; + + 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."); +#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_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; +} |