src/quotacheck/quotacheck.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <stdio.h>
  23 #include <stdbool.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26
  27 #include "util.h"
  28 #include "process-util.h"
  29
  30 static bool arg_skip = false;
  31 static bool arg_force = false;
  32
  33 static int parse_proc_cmdline_item(const char *key, const char *value) {
  34
  35         if (streq(key, "quotacheck.mode") && value) {
  36
  37                 if (streq(value, "auto"))
  38                         arg_force = arg_skip = false;
  39                 else if (streq(value, "force"))
  40                         arg_force = true;
  41                 else if (streq(value, "skip"))
  42                         arg_skip = true;
  43                 else
  44                         log_warning("Invalid quotacheck.mode= parameter '%s'. Ignoring.", value);
  45         }
  46
  47 #ifdef HAVE_SYSV_COMPAT
  48         else if (streq(key, "forcequotacheck") && !value) {
  49                 log_warning("Please use 'quotacheck.mode=force' rather than 'forcequotacheck' on the kernel command line.");
  50                 arg_force = true;
  51         }
  52 #endif
  53
  54         return 0;
  55 }
  56
  57 static void test_files(void) {
  58
  59 #ifdef HAVE_SYSV_COMPAT
  60         if (access("/forcequotacheck", F_OK) >= 0) {
  61                 log_error("Please pass 'quotacheck.mode=force' on the kernel command line rather than creating /forcequotacheck on the root file system.");
  62                 arg_force = true;
  63         }
  64 #endif
  65 }
  66
  67 int main(int argc, char *argv[]) {
  68
  69         static const char * const cmdline[] = {
  70                 QUOTACHECK,
  71                 "-anug",
  72                 NULL
  73         };
  74
  75         pid_t pid;
  76         int r;
  77
  78         if (argc > 1) {
  79                 log_error("This program takes no arguments.");
  80                 return EXIT_FAILURE;
  81         }
  82
  83         log_set_target(LOG_TARGET_AUTO);
  84         log_parse_environment();
  85         log_open();
  86
  87         umask(0022);
  88
  89         r = parse_proc_cmdline(parse_proc_cmdline_item);
  90         if (r < 0)
  91                 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
  92
  93         test_files();
  94
  95         if (!arg_force) {
  96                 if (arg_skip)
  97                         return EXIT_SUCCESS;
  98
  99                 if (access("/run/systemd/quotacheck", F_OK) < 0)
 100                         return EXIT_SUCCESS;
 101         }
 102
 103         pid = fork();
 104         if (pid < 0) {
 105                 log_error_errno(errno, "fork(): %m");
 106                 return EXIT_FAILURE;
 107         } else if (pid == 0) {
 108                 /* Child */
 109                 execv(cmdline[0], (char**) cmdline);
 110                 _exit(1); /* Operational error */
 111         }
 112
 113         r = wait_for_terminate_and_warn("quotacheck", pid, true);
 114
 115         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 116 }