loginutils/deluser.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * deluser/delgroup implementation for busybox
   4  *
   5  * Copyright (C) 1999 by Lineo, inc. and John Beppu
   6  * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
   7  * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
   8  *
   9  * Licensed under GPLv2, see file LICENSE in this source tree.
  10  *
  11  */
  12 #include "libbb.h"
  13
  14 static int del_line_matching(char **args, const char *filename)
  15 {
  16         if (ENABLE_FEATURE_DEL_USER_FROM_GROUP && args[2]) {
  17                 return update_passwd(filename, args[2], NULL, args[1]);
  18         }
  19         return update_passwd(filename, args[1], NULL, NULL);
  20 }
  21
  22 int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  23 int deluser_main(int argc, char **argv)
  24 {
  25         if (argc != 2
  26          && (!ENABLE_FEATURE_DEL_USER_FROM_GROUP
  27             || (applet_name[3] != 'g' || argc != 3))
  28         ) {
  29                 bb_show_usage();
  30         }
  31
  32         if (geteuid())
  33                 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
  34
  35         if ((ENABLE_FEATURE_DEL_USER_FROM_GROUP && argc != 3)
  36          || ENABLE_DELUSER
  37          || (ENABLE_DELGROUP && ENABLE_DESKTOP)
  38         ) {
  39                 if (ENABLE_DELUSER
  40                  && (!ENABLE_DELGROUP || applet_name[3] == 'u')
  41                 ) {
  42                         if (del_line_matching(argv, bb_path_passwd_file) < 0)
  43                                 return EXIT_FAILURE;
  44                         if (ENABLE_FEATURE_SHADOWPASSWDS) {
  45                                 del_line_matching(argv, bb_path_shadow_file);
  46                         }
  47                 } else if (ENABLE_DESKTOP && ENABLE_DELGROUP && getpwnam(argv[1]))
  48                         bb_error_msg_and_die("can't remove primary group of user %s", argv[1]);
  49         }
  50         if (del_line_matching(argv, bb_path_group_file) < 0)
  51                 return EXIT_FAILURE;
  52         if (ENABLE_FEATURE_SHADOWPASSWDS) {
  53                 del_line_matching(argv, bb_path_gshadow_file);
  54         }
  55         return EXIT_SUCCESS;
  56 }