[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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[1765] | 3 | * deluser/delgroup implementation for busybox
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[821] | 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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[1765] | 7 | * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
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[821] | 8 | *
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[2725] | 9 | * Licensed under GPLv2, see file LICENSE in this source tree.
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[821] | 10 | *
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| 11 | */
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[3232] | 12 |
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| 13 | //usage:#define deluser_trivial_usage
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| 14 | //usage: "USER"
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| 15 | //usage:#define deluser_full_usage "\n\n"
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| 16 | //usage: "Delete USER from the system"
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| 17 |
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| 18 | //usage:#define delgroup_trivial_usage
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| 19 | //usage: IF_FEATURE_DEL_USER_FROM_GROUP("[USER] ")"GROUP"
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| 20 | //usage:#define delgroup_full_usage "\n\n"
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| 21 | //usage: "Delete group GROUP from the system"
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| 22 | //usage: IF_FEATURE_DEL_USER_FROM_GROUP(" or user USER from group GROUP")
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| 23 |
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[1765] | 24 | #include "libbb.h"
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[821] | 25 |
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[2725] | 26 | int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 27 | int deluser_main(int argc, char **argv)
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[821] | 28 | {
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[2725] | 29 | /* User or group name */
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| 30 | char *name;
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| 31 | /* Username (non-NULL only in "delgroup USER GROUP" case) */
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| 32 | char *member;
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| 33 | /* Name of passwd or group file */
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| 34 | const char *pfile;
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| 35 | /* Name of shadow or gshadow file */
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| 36 | const char *sfile;
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| 37 | /* Are we deluser or delgroup? */
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| 38 | int do_deluser = (ENABLE_DELUSER && (!ENABLE_DELGROUP || applet_name[3] == 'u'));
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[821] | 39 |
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[2725] | 40 | if (geteuid() != 0)
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| 41 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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[821] | 42 |
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[2725] | 43 | name = argv[1];
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| 44 | member = NULL;
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[821] | 45 |
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[2725] | 46 | switch (argc) {
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| 47 | case 3:
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| 48 | if (!ENABLE_FEATURE_DEL_USER_FROM_GROUP || do_deluser)
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| 49 | break;
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| 50 | /* It's "delgroup USER GROUP" */
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| 51 | member = name;
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| 52 | name = argv[2];
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| 53 | /* Fallthrough */
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[821] | 54 |
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[2725] | 55 | case 2:
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| 56 | if (do_deluser) {
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| 57 | /* "deluser USER" */
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| 58 | xgetpwnam(name); /* bail out if USER is wrong */
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| 59 | pfile = bb_path_passwd_file;
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| 60 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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| 61 | sfile = bb_path_shadow_file;
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[821] | 62 | } else {
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[2725] | 63 | struct group *gr;
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| 64 | do_delgroup:
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| 65 | /* "delgroup GROUP" or "delgroup USER GROUP" */
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| 66 | if (do_deluser < 0) { /* delgroup after deluser? */
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| 67 | gr = getgrnam(name);
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| 68 | if (!gr)
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| 69 | return EXIT_SUCCESS;
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| 70 | } else {
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| 71 | gr = xgetgrnam(name); /* bail out if GROUP is wrong */
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[1765] | 72 | }
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[2725] | 73 | if (!member) {
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| 74 | /* "delgroup GROUP" */
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| 75 | struct passwd *pw;
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| 76 | struct passwd pwent;
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| 77 | /* Check if the group is in use */
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| 78 | #define passwd_buf bb_common_bufsiz1
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| 79 | while (!getpwent_r(&pwent, passwd_buf, sizeof(passwd_buf), &pw)) {
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| 80 | if (pwent.pw_gid == gr->gr_gid)
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| 81 | bb_error_msg_and_die("'%s' still has '%s' as their primary group!", pwent.pw_name, name);
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| 82 | }
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| 83 | //endpwent();
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| 84 | }
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| 85 | pfile = bb_path_group_file;
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| 86 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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| 87 | sfile = bb_path_gshadow_file;
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[821] | 88 | }
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| 89 |
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[2725] | 90 | /* Modify pfile, then sfile */
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| 91 | do {
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| 92 | if (update_passwd(pfile, name, NULL, member) == -1)
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| 93 | return EXIT_FAILURE;
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| 94 | if (ENABLE_FEATURE_SHADOWPASSWDS) {
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| 95 | pfile = sfile;
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| 96 | sfile = NULL;
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| 97 | }
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| 98 | } while (ENABLE_FEATURE_SHADOWPASSWDS && pfile);
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[1765] | 99 |
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[2725] | 100 | if (ENABLE_DELGROUP && do_deluser > 0) {
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| 101 | /* "deluser USER" also should try to delete
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| 102 | * same-named group. IOW: do "delgroup USER"
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| 103 | */
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| 104 | // On debian deluser is a perl script that calls userdel.
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| 105 | // From man userdel:
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| 106 | // If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will
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| 107 | // delete the group with the same name as the user.
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| 108 | do_deluser = -1;
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| 109 | goto do_delgroup;
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[821] | 110 | }
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[1765] | 111 | return EXIT_SUCCESS;
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[2725] | 112 | }
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| 113 | /* Reached only if number of command line args is wrong */
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| 114 | bb_show_usage();
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[821] | 115 | }
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