fsck: add initial version of fsck and quotacheck wrappers

[elogind.git] / src / quotacheck.c

diff --git a/src/quotacheck.c b/src/quotacheck.c
new file mode 100644 (file)
index 0000000..a579c5e
--- /dev/null
+++ b/src/quotacheck.c
@@ -0,0 +1,115 @@
+/*-*- 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 "util.h"
+
+static bool arg_skip = false;
+static bool arg_force = false;
+
+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, "quotacheck.mode=auto", l))
+                        arg_force = arg_skip = false;
+                else if (strneq(w, "quotacheck.mode=force", l))
+                        arg_force = true;
+                else if (strneq(w, "quotacheck.mode=skip", l))
+                        arg_skip = true;
+                else if (startswith(w, "quotacheck.mode"))
+                        log_warning("Invalid quotacheck.mode= parameter. Ignoring.");
+#ifdef TARGET_FEDORA
+                else if (strneq(w, "forcequotacheck", l))
+                        arg_force = true;
+#endif
+        }
+
+        free(line);
+        return 0;
+}
+
+static void test_files(void) {
+#ifdef TARGET_FEDORA
+        /* This exists only on Fedora */
+        if (access("/forcequoatcheck", F_OK) >= 0)
+                arg_force = true;
+#endif
+}
+
+int main(int argc, char *argv[]) {
+        static const char * const cmdline[] = {
+                "/sbin/quotacheck",
+                "-anug",
+                NULL
+        };
+
+        int r = EXIT_FAILURE;
+        pid_t pid;
+
+        if (argc > 1) {
+                log_error("This program takes 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) {
+
+                if (arg_skip)
+                        return 0;
+
+                if (access("/dev/.systemd/quotacheck", F_OK) < 0)
+                        return 0;
+        }
+
+        if ((pid = fork()) < 0) {
+                log_error("fork(): %m");
+                goto finish;
+        } else if (pid == 0) {
+                /* Child */
+                execv(cmdline[0], (char**) cmdline);
+                _exit(1); /* Operational error */
+        }
+
+        r = wait_for_terminate_and_warn("quotacheck", pid) >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+
+finish:
+        return r;
+}