/*-*- 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."); #ifdef TARGET_FEDORA 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; }