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-rw-r--r--src/quotacheck/quotacheck.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/quotacheck/quotacheck.c b/src/quotacheck/quotacheck.c
new file mode 100644
index 0000000..575965c
--- /dev/null
+++ b/src/quotacheck/quotacheck.c
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/prctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "main-func.h"
+#include "proc-cmdline.h"
+#include "process-util.h"
+#include "signal-util.h"
+#include "string-util.h"
+#include "util.h"
+
+static bool arg_skip = false;
+static bool arg_force = false;
+
+static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
+
+ if (streq(key, "quotacheck.mode")) {
+
+ if (proc_cmdline_value_missing(key, value))
+ return 0;
+
+ if (streq(value, "auto"))
+ arg_force = arg_skip = false;
+ else if (streq(value, "force"))
+ arg_force = true;
+ else if (streq(value, "skip"))
+ arg_skip = true;
+ else
+ log_warning("Invalid quotacheck.mode= parameter '%s'. Ignoring.", value);
+ }
+
+#if HAVE_SYSV_COMPAT
+ else if (streq(key, "forcequotacheck") && !value) {
+ log_warning("Please use 'quotacheck.mode=force' rather than 'forcequotacheck' on the kernel command line.");
+ arg_force = true;
+ }
+#endif
+
+ return 0;
+}
+
+static void test_files(void) {
+
+#if HAVE_SYSV_COMPAT
+ if (access("/forcequotacheck", F_OK) >= 0) {
+ log_error("Please pass 'quotacheck.mode=force' on the kernel command line rather than creating /forcequotacheck on the root file system.");
+ arg_force = true;
+ }
+#endif
+}
+
+static int run(int argc, char *argv[]) {
+ int r;
+
+ log_setup();
+
+ if (argc > 1)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "This program takes no arguments.");
+
+ umask(0022);
+
+ r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
+
+ test_files();
+
+ if (!arg_force) {
+ if (arg_skip)
+ return 0;
+
+ if (access("/run/systemd/quotacheck", F_OK) < 0)
+ return 0;
+ }
+
+ r = safe_fork("(quotacheck)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_RLIMIT_NOFILE_SAFE|FORK_WAIT|FORK_LOG, NULL);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ static const char * const cmdline[] = {
+ QUOTACHECK,
+ "-anug",
+ NULL
+ };
+
+ /* Child */
+
+ execv(cmdline[0], (char**) cmdline);
+ _exit(EXIT_FAILURE); /* Operational error */
+ }
+
+ return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);