[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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[3621] | 11 | //config:config DELUSER
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| 12 | //config: bool "deluser"
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| 13 | //config: default y
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| 14 | //config: help
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| 15 | //config: Utility for deleting a user account.
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| 16 | //config:
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| 17 | //config:config DELGROUP
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| 18 | //config: bool "delgroup"
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| 19 | //config: default y
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| 20 | //config: help
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| 21 | //config: Utility for deleting a group account.
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| 22 | //config:
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| 23 | //config:config FEATURE_DEL_USER_FROM_GROUP
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| 24 | //config: bool "Support for removing users from groups"
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| 25 | //config: default y
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| 26 | //config: depends on DELGROUP
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| 27 | //config: help
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| 28 | //config: If called with two non-option arguments, deluser
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| 29 | //config: or delgroup will remove an user from a specified group.
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[3232] | 30 |
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[3621] | 31 | //applet:IF_DELUSER(APPLET(deluser, BB_DIR_USR_SBIN, BB_SUID_DROP))
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| 32 | //applet:IF_DELGROUP(APPLET_ODDNAME(delgroup, deluser, BB_DIR_USR_SBIN, BB_SUID_DROP, delgroup))
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| 33 |
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| 34 | //kbuild:lib-$(CONFIG_DELUSER) += deluser.o
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| 35 | //kbuild:lib-$(CONFIG_DELGROUP) += deluser.o
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| 36 |
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[3232] | 37 | //usage:#define deluser_trivial_usage
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[3621] | 38 | //usage: IF_LONG_OPTS("[--remove-home] ") "USER"
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[3232] | 39 | //usage:#define deluser_full_usage "\n\n"
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| 40 | //usage: "Delete USER from the system"
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[3621] | 41 | // --remove-home is self-explanatory enough to put it in --help
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[3232] | 42 |
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| 43 | //usage:#define delgroup_trivial_usage
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| 44 | //usage: IF_FEATURE_DEL_USER_FROM_GROUP("[USER] ")"GROUP"
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| 45 | //usage:#define delgroup_full_usage "\n\n"
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| 46 | //usage: "Delete group GROUP from the system"
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| 47 | //usage: IF_FEATURE_DEL_USER_FROM_GROUP(" or user USER from group GROUP")
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| 48 |
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[1765] | 49 | #include "libbb.h"
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[821] | 50 |
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[2725] | 51 | int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 52 | int deluser_main(int argc, char **argv)
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[821] | 53 | {
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[2725] | 54 | /* User or group name */
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| 55 | char *name;
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| 56 | /* Username (non-NULL only in "delgroup USER GROUP" case) */
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| 57 | char *member;
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| 58 | /* Name of passwd or group file */
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| 59 | const char *pfile;
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| 60 | /* Name of shadow or gshadow file */
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| 61 | const char *sfile;
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| 62 | /* Are we deluser or delgroup? */
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| 63 | int do_deluser = (ENABLE_DELUSER && (!ENABLE_DELGROUP || applet_name[3] == 'u'));
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[821] | 64 |
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[3621] | 65 | #if !ENABLE_LONG_OPTS
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| 66 | const int opt_delhome = 0;
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| 67 | #else
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| 68 | int opt_delhome = 0;
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| 69 | if (do_deluser) {
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| 70 | applet_long_options =
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| 71 | "remove-home\0" No_argument "\xff";
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| 72 | opt_delhome = getopt32(argv, "");
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| 73 | argv += opt_delhome;
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| 74 | argc -= opt_delhome;
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| 75 | }
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| 76 | #endif
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| 77 |
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[2725] | 78 | if (geteuid() != 0)
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| 79 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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[821] | 80 |
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[2725] | 81 | name = argv[1];
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| 82 | member = NULL;
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[821] | 83 |
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[2725] | 84 | switch (argc) {
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| 85 | case 3:
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| 86 | if (!ENABLE_FEATURE_DEL_USER_FROM_GROUP || do_deluser)
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| 87 | break;
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| 88 | /* It's "delgroup USER GROUP" */
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| 89 | member = name;
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| 90 | name = argv[2];
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| 91 | /* Fallthrough */
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[821] | 92 |
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[2725] | 93 | case 2:
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| 94 | if (do_deluser) {
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| 95 | /* "deluser USER" */
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[3621] | 96 | struct passwd *pw;
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| 97 |
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| 98 | pw = xgetpwnam(name); /* bail out if USER is wrong */
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[2725] | 99 | pfile = bb_path_passwd_file;
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| 100 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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| 101 | sfile = bb_path_shadow_file;
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[3621] | 102 | if (opt_delhome)
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| 103 | remove_file(pw->pw_dir, FILEUTILS_RECUR);
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[821] | 104 | } else {
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[2725] | 105 | struct group *gr;
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| 106 | do_delgroup:
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| 107 | /* "delgroup GROUP" or "delgroup USER GROUP" */
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| 108 | if (do_deluser < 0) { /* delgroup after deluser? */
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| 109 | gr = getgrnam(name);
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| 110 | if (!gr)
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| 111 | return EXIT_SUCCESS;
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| 112 | } else {
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| 113 | gr = xgetgrnam(name); /* bail out if GROUP is wrong */
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[1765] | 114 | }
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[2725] | 115 | if (!member) {
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| 116 | /* "delgroup GROUP" */
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| 117 | struct passwd *pw;
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| 118 | /* Check if the group is in use */
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[3621] | 119 | while ((pw = getpwent()) != NULL) {
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| 120 | if (pw->pw_gid == gr->gr_gid)
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| 121 | bb_error_msg_and_die("'%s' still has '%s' as their primary group!",
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| 122 | pw->pw_name, name);
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[2725] | 123 | }
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| 124 | //endpwent();
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| 125 | }
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| 126 | pfile = bb_path_group_file;
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| 127 | if (ENABLE_FEATURE_SHADOWPASSWDS)
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| 128 | sfile = bb_path_gshadow_file;
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[821] | 129 | }
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| 130 |
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[2725] | 131 | /* Modify pfile, then sfile */
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| 132 | do {
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| 133 | if (update_passwd(pfile, name, NULL, member) == -1)
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| 134 | return EXIT_FAILURE;
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| 135 | if (ENABLE_FEATURE_SHADOWPASSWDS) {
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| 136 | pfile = sfile;
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| 137 | sfile = NULL;
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| 138 | }
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| 139 | } while (ENABLE_FEATURE_SHADOWPASSWDS && pfile);
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[1765] | 140 |
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[3621] | 141 | if (do_deluser > 0) {
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| 142 | /* Delete user from all groups */
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| 143 | if (update_passwd(bb_path_group_file, NULL, NULL, name) == -1)
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| 144 | return EXIT_FAILURE;
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| 145 |
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| 146 | if (ENABLE_DELGROUP) {
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| 147 | /* "deluser USER" also should try to delete
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| 148 | * same-named group. IOW: do "delgroup USER"
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| 149 | */
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[2725] | 150 | // On debian deluser is a perl script that calls userdel.
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| 151 | // From man userdel:
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| 152 | // If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will
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| 153 | // delete the group with the same name as the user.
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[3621] | 154 | do_deluser = -1;
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| 155 | goto do_delgroup;
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| 156 | }
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[821] | 157 | }
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[1765] | 158 | return EXIT_SUCCESS;
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[2725] | 159 | }
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| 160 | /* Reached only if number of command line args is wrong */
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| 161 | bb_show_usage();
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[821] | 162 | }
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