fsck: add initial version of fsck and quotacheck wrappers

1 files changed, 218 insertions, 0 deletions

diff --git a/src/fsck.c b/src/fsck.c
new file mode 100644
index 0000000000..0b0cf64036
--- /dev/null
+++ b/src/fsck.c
@@ -0,0 +1,218 @@
+/*-*- 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 <dbus/dbus.h>
+
+#include "util.h"
+#include "ac-power.h"
+#include "dbus-common.h"
+#include "special.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;
+        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_debug("Running request %s/start/%s", target, mode);
+
+        if (!(m = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit"))) {
+                log_error("Could not allocate message.");
+                goto finish;
+        }
+
+        if (!dbus_message_append_args(m,
+                                      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))) {
+                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[]) {
+        static const char * cmdline[7];
+        int i = 0, r = EXIT_FAILURE, q;
+        pid_t pid;
+        siginfo_t status;
+
+        if (argc != 2) {
+                log_error("This program expects exactly one argument.");
+                return EXIT_FAILURE;
+        }
+
+        log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
+        log_parse_environment();
+        log_open();
+
+        parse_proc_cmdline();
+        test_files();
+
+        if (!arg_force) {
+                if (arg_skip)
+                        return 0;
+
+                /* FIXME: only execute necessary fsck's if no AC power present */
+                if (on_ac_power() == 0)
+                        return 0;
+        }
+
+        cmdline[i++] = "/sbin/fsck";
+        cmdline[i++] = "-a";
+        cmdline[i++] = "-T";
+        cmdline[i++] = "-C";
+
+        if (arg_force)
+                cmdline[i++] = "-f";
+
+        cmdline[i++] = argv[1];
+        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_KILLED ||
+            status.si_code == CLD_DUMPED) {
+                log_error("fsck terminated by signal %s.", signal_to_string(status.si_status));
+                goto finish;
+
+        } else if (status.si_code != CLD_EXITED) {
+                log_error("fsck failed due to unknown reason.");
+                goto finish;
+        }
+
+        if (status.si_status & ~1) {
+
+                if (access("/dev/.systemd/late-fsck", F_OK) >= 0) {
+                        log_error("fsck failed with error code %i.", status.si_status);
+                        goto finish;
+                }
+
+                if (status.si_status & 2)
+                        /* System should be rebooted. */
+                        start_target(SPECIAL_REBOOT_TARGET, false);
+                else
+                        /* Some other problem */
+                        start_target(SPECIAL_EMERGENCY_TARGET, true);
+
+        } else
+                r = EXIT_SUCCESS;
+
+        if (status.si_status & 1)
+                touch("/dev/.systemd/quotacheck");
+
+finish:
+        return r;
+}