1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * deluser/delgroup implementation for busybox
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4 | *
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5 | * Copyright (C) 1999 by Lineo, inc. and John Beppu
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6 | * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
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7 | * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
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8 | *
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9 | * Licensed under GPLv2, see file LICENSE in this source tree.
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10 | *
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11 | */
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12 | #include "libbb.h"
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13 |
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14 | int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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15 | int deluser_main(int argc, char **argv)
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16 | {
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17 | /* User or group name */
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18 | char *name;
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19 | /* Username (non-NULL only in "delgroup USER GROUP" case) */
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20 | char *member;
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21 | /* Name of passwd or group file */
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22 | const char *pfile;
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23 | /* Name of shadow or gshadow file */
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24 | const char *sfile;
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25 | /* Are we deluser or delgroup? */
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26 | int do_deluser = (ENABLE_DELUSER && (!ENABLE_DELGROUP || applet_name[3] == 'u'));
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27 |
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28 | if (geteuid() != 0)
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29 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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30 |
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31 | name = argv[1];
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32 | member = NULL;
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33 |
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34 | switch (argc) {
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35 | case 3:
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36 | if (!ENABLE_FEATURE_DEL_USER_FROM_GROUP || do_deluser)
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37 | break;
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38 | /* It's "delgroup USER GROUP" */
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39 | member = name;
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40 | name = argv[2];
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41 | /* Fallthrough */
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42 |
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43 | case 2:
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44 | if (do_deluser) {
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45 | /* "deluser USER" */
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46 | xgetpwnam(name); /* bail out if USER is wrong */
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47 | pfile = bb_path_passwd_file;
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48 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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49 | sfile = bb_path_shadow_file;
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50 | } else {
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51 | struct group *gr;
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52 | do_delgroup:
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53 | /* "delgroup GROUP" or "delgroup USER GROUP" */
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54 | if (do_deluser < 0) { /* delgroup after deluser? */
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55 | gr = getgrnam(name);
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56 | if (!gr)
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57 | return EXIT_SUCCESS;
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58 | } else {
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59 | gr = xgetgrnam(name); /* bail out if GROUP is wrong */
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60 | }
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61 | if (!member) {
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62 | /* "delgroup GROUP" */
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63 | struct passwd *pw;
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64 | struct passwd pwent;
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65 | /* Check if the group is in use */
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66 | #define passwd_buf bb_common_bufsiz1
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67 | while (!getpwent_r(&pwent, passwd_buf, sizeof(passwd_buf), &pw)) {
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68 | if (pwent.pw_gid == gr->gr_gid)
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69 | bb_error_msg_and_die("'%s' still has '%s' as their primary group!", pwent.pw_name, name);
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70 | }
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71 | //endpwent();
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72 | }
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73 | pfile = bb_path_group_file;
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74 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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75 | sfile = bb_path_gshadow_file;
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76 | }
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77 |
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78 | /* Modify pfile, then sfile */
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79 | do {
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80 | if (update_passwd(pfile, name, NULL, member) == -1)
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81 | return EXIT_FAILURE;
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82 | if (ENABLE_FEATURE_SHADOWPASSWDS) {
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83 | pfile = sfile;
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84 | sfile = NULL;
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85 | }
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86 | } while (ENABLE_FEATURE_SHADOWPASSWDS && pfile);
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87 |
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88 | if (ENABLE_DELGROUP && do_deluser > 0) {
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89 | /* "deluser USER" also should try to delete
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90 | * same-named group. IOW: do "delgroup USER"
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91 | */
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92 | // On debian deluser is a perl script that calls userdel.
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93 | // From man userdel:
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94 | // If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will
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95 | // delete the group with the same name as the user.
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96 | do_deluser = -1;
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97 | goto do_delgroup;
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98 | }
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99 | return EXIT_SUCCESS;
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100 | }
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101 | /* Reached only if number of command line args is wrong */
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102 | bb_show_usage();
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103 | }
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