diff options
Diffstat (limited to 'src/quotacheck')
-rw-r--r-- | src/quotacheck/quotacheck.c | 102 |
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); |