408 lines
12 KiB
C
408 lines
12 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#include <libudev.h>
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#include <dbus/dbus.h>
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#include "util.h"
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#include "dbus-common.h"
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#include "special.h"
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#include "bus-errors.h"
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#include "virt.h"
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static bool arg_skip = false;
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static bool arg_force = false;
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static bool arg_show_progress = false;
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static void start_target(const char *target, bool isolate) {
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DBusMessage *m = NULL, *reply = NULL;
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DBusError error;
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const char *mode, *basic_target = "basic.target";
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DBusConnection *bus = NULL;
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assert(target);
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dbus_error_init(&error);
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if (bus_connect(DBUS_BUS_SYSTEM, &bus, NULL, &error) < 0) {
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log_error("Failed to get D-Bus connection: %s", bus_error_message(&error));
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goto finish;
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}
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if (isolate)
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mode = "isolate";
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else
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mode = "replace";
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log_info("Running request %s/start/%s", target, mode);
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if (!(m = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnitReplace"))) {
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log_error("Could not allocate message.");
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goto finish;
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}
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/* Start these units only if we can replace base.target with it */
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if (!dbus_message_append_args(m,
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DBUS_TYPE_STRING, &basic_target,
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DBUS_TYPE_STRING, &target,
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DBUS_TYPE_STRING, &mode,
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DBUS_TYPE_INVALID)) {
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log_error("Could not attach target and flag information to message.");
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goto finish;
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}
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if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
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/* Don't print a warning if we aren't called during
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* startup */
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if (!dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_JOB))
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log_error("Failed to start unit: %s", bus_error_message(&error));
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goto finish;
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}
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finish:
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if (m)
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dbus_message_unref(m);
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if (reply)
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dbus_message_unref(reply);
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if (bus) {
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dbus_connection_flush(bus);
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dbus_connection_close(bus);
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dbus_connection_unref(bus);
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}
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dbus_error_free(&error);
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}
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static int parse_proc_cmdline(void) {
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char *line, *w, *state;
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int r;
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size_t l;
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if (detect_container(NULL) > 0)
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return 0;
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r = read_one_line_file("/proc/cmdline", &line);
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if (r < 0) {
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log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
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return 0;
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}
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FOREACH_WORD_QUOTED(w, l, line, state) {
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if (strneq(w, "fsck.mode=auto", l))
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arg_force = arg_skip = false;
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else if (strneq(w, "fsck.mode=force", l))
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arg_force = true;
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else if (strneq(w, "fsck.mode=skip", l))
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arg_skip = true;
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else if (startswith(w, "fsck"))
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log_warning("Invalid fsck parameter. Ignoring.");
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#if defined(TARGET_FEDORA) || defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
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else if (strneq(w, "fastboot", l))
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arg_skip = true;
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else if (strneq(w, "forcefsck", l))
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arg_force = true;
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#endif
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}
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free(line);
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return 0;
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}
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static void test_files(void) {
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if (access("/fastboot", F_OK) >= 0)
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arg_skip = true;
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if (access("/forcefsck", F_OK) >= 0)
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arg_force = true;
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if (access("/run/systemd/show-status", F_OK) >= 0 || plymouth_running())
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arg_show_progress = true;
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}
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static double percent(int pass, unsigned long cur, unsigned long max) {
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/* Values stolen from e2fsck */
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static const int pass_table[] = {
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0, 70, 90, 92, 95, 100
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};
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if (pass <= 0)
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return 0.0;
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if ((unsigned) pass >= ELEMENTSOF(pass_table) || max == 0)
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return 100.0;
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return (double) pass_table[pass-1] +
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((double) pass_table[pass] - (double) pass_table[pass-1]) *
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(double) cur / (double) max;
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}
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static int process_progress(int fd) {
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FILE *f, *console;
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usec_t last = 0;
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bool locked = false;
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int clear = 0;
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f = fdopen(fd, "r");
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if (!f) {
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close_nointr_nofail(fd);
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return -errno;
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}
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console = fopen("/dev/console", "w");
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if (!console) {
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fclose(f);
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return -ENOMEM;
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}
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while (!feof(f)) {
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int pass, m;
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unsigned long cur, max;
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char *device;
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double p;
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usec_t t;
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if (fscanf(f, "%i %lu %lu %ms", &pass, &cur, &max, &device) != 4)
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break;
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/* Only show one progress counter at max */
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if (!locked) {
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if (flock(fileno(console), LOCK_EX|LOCK_NB) < 0) {
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free(device);
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continue;
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}
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locked = true;
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}
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/* Only update once every 50ms */
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t = now(CLOCK_MONOTONIC);
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if (last + 50 * USEC_PER_MSEC > t) {
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free(device);
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continue;
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}
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last = t;
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p = percent(pass, cur, max);
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fprintf(console, "\r%s: fsck %3.1f%% complete...\r%n", device, p, &m);
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fflush(console);
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free(device);
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if (m > clear)
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clear = m;
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}
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if (clear > 0) {
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unsigned j;
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fputc('\r', console);
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for (j = 0; j < (unsigned) clear; j++)
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fputc(' ', console);
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fputc('\r', console);
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fflush(console);
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}
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fclose(f);
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fclose(console);
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return 0;
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}
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int main(int argc, char *argv[]) {
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const char *cmdline[9];
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int i = 0, r = EXIT_FAILURE, q;
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pid_t pid;
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siginfo_t status;
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struct udev *udev = NULL;
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struct udev_device *udev_device = NULL;
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const char *device;
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bool root_directory;
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int progress_pipe[2] = { -1, -1 };
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char dash_c[2+10+1];
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if (argc > 2) {
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log_error("This program expects one or no arguments.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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umask(0022);
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parse_proc_cmdline();
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test_files();
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if (!arg_force && arg_skip)
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return 0;
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if (argc > 1) {
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device = argv[1];
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root_directory = false;
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} else {
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struct stat st;
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struct timespec times[2];
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/* Find root device */
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if (stat("/", &st) < 0) {
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log_error("Failed to stat() the root directory: %m");
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goto finish;
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}
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/* Virtual root devices don't need an fsck */
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if (major(st.st_dev) == 0)
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return 0;
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/* check if we are already writable */
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times[0] = st.st_atim;
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times[1] = st.st_mtim;
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if (utimensat(AT_FDCWD, "/", times, 0) == 0) {
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log_info("Root directory is writable, skipping check.");
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return 0;
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}
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if (!(udev = udev_new())) {
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log_oom();
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goto finish;
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}
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if (!(udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev))) {
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log_error("Failed to detect root device.");
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goto finish;
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}
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if (!(device = udev_device_get_devnode(udev_device))) {
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log_error("Failed to detect device node of root directory.");
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goto finish;
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}
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root_directory = true;
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}
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if (arg_show_progress)
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if (pipe(progress_pipe) < 0) {
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log_error("pipe(): %m");
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goto finish;
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}
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cmdline[i++] = "/sbin/fsck";
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cmdline[i++] = "-a";
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cmdline[i++] = "-T";
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cmdline[i++] = "-l";
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if (!root_directory)
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cmdline[i++] = "-M";
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if (arg_force)
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cmdline[i++] = "-f";
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if (progress_pipe[1] >= 0) {
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snprintf(dash_c, sizeof(dash_c), "-C%i", progress_pipe[1]);
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char_array_0(dash_c);
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cmdline[i++] = dash_c;
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}
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cmdline[i++] = device;
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cmdline[i++] = NULL;
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pid = fork();
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if (pid < 0) {
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log_error("fork(): %m");
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goto finish;
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} else if (pid == 0) {
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/* Child */
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if (progress_pipe[0] >= 0)
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close_nointr_nofail(progress_pipe[0]);
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execv(cmdline[0], (char**) cmdline);
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_exit(8); /* Operational error */
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}
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if (progress_pipe[1] >= 0) {
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close_nointr_nofail(progress_pipe[1]);
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progress_pipe[1] = -1;
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}
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if (progress_pipe[0] >= 0) {
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process_progress(progress_pipe[0]);
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progress_pipe[0] = -1;
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}
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q = wait_for_terminate(pid, &status);
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if (q < 0) {
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log_error("waitid(): %s", strerror(-q));
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goto finish;
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}
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if (status.si_code != CLD_EXITED || (status.si_status & ~1)) {
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if (status.si_code == CLD_KILLED || status.si_code == CLD_DUMPED)
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log_error("fsck terminated by signal %s.", signal_to_string(status.si_status));
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else if (status.si_code == CLD_EXITED)
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log_error("fsck failed with error code %i.", status.si_status);
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else
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log_error("fsck failed due to unknown reason.");
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if (status.si_code == CLD_EXITED && (status.si_status & 2) && root_directory)
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/* System should be rebooted. */
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start_target(SPECIAL_REBOOT_TARGET, false);
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else if (status.si_code == CLD_EXITED && (status.si_status & 6))
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/* Some other problem */
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start_target(SPECIAL_EMERGENCY_TARGET, true);
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else {
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r = EXIT_SUCCESS;
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log_warning("Ignoring error.");
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}
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} else
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r = EXIT_SUCCESS;
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if (status.si_code == CLD_EXITED && (status.si_status & 1))
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touch("/run/systemd/quotacheck");
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finish:
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if (udev_device)
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udev_device_unref(udev_device);
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if (udev)
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udev_unref(udev);
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close_pipe(progress_pipe);
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return r;
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}
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