[3320] | 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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