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163 lines
4.5 KiB
C
163 lines
4.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* deluser/delgroup implementation for busybox
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*
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* Copyright (C) 1999 by Lineo, inc. and John Beppu
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* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
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* Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config DELUSER
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//config: bool "deluser"
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//config: default y
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//config: help
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//config: Utility for deleting a user account.
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//config:
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//config:config DELGROUP
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//config: bool "delgroup"
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//config: default y
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//config: help
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//config: Utility for deleting a group account.
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//config:
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//config:config FEATURE_DEL_USER_FROM_GROUP
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//config: bool "Support for removing users from groups"
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//config: default y
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//config: depends on DELGROUP
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//config: help
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//config: If called with two non-option arguments, deluser
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//config: or delgroup will remove an user from a specified group.
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//applet:IF_DELUSER(APPLET(deluser, BB_DIR_USR_SBIN, BB_SUID_DROP))
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//applet:IF_DELGROUP(APPLET_ODDNAME(delgroup, deluser, BB_DIR_USR_SBIN, BB_SUID_DROP, delgroup))
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//kbuild:lib-$(CONFIG_DELUSER) += deluser.o
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//kbuild:lib-$(CONFIG_DELGROUP) += deluser.o
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//usage:#define deluser_trivial_usage
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//usage: IF_LONG_OPTS("[--remove-home] ") "USER"
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//usage:#define deluser_full_usage "\n\n"
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//usage: "Delete USER from the system"
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// --remove-home is self-explanatory enough to put it in --help
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//usage:#define delgroup_trivial_usage
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//usage: IF_FEATURE_DEL_USER_FROM_GROUP("[USER] ")"GROUP"
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//usage:#define delgroup_full_usage "\n\n"
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//usage: "Delete group GROUP from the system"
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//usage: IF_FEATURE_DEL_USER_FROM_GROUP(" or user USER from group GROUP")
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#include "libbb.h"
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int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int deluser_main(int argc, char **argv)
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{
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/* User or group name */
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char *name;
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/* Username (non-NULL only in "delgroup USER GROUP" case) */
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char *member;
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/* Name of passwd or group file */
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const char *pfile;
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/* Name of shadow or gshadow file */
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const char *sfile;
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/* Are we deluser or delgroup? */
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int do_deluser = (ENABLE_DELUSER && (!ENABLE_DELGROUP || applet_name[3] == 'u'));
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#if !ENABLE_LONG_OPTS
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const int opt_delhome = 0;
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#else
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int opt_delhome = 0;
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if (do_deluser) {
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applet_long_options =
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"remove-home\0" No_argument "\xff";
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opt_delhome = getopt32(argv, "");
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argv += opt_delhome;
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argc -= opt_delhome;
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}
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#endif
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if (geteuid() != 0)
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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name = argv[1];
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member = NULL;
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switch (argc) {
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case 3:
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if (!ENABLE_FEATURE_DEL_USER_FROM_GROUP || do_deluser)
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break;
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/* It's "delgroup USER GROUP" */
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member = name;
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name = argv[2];
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/* Fallthrough */
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case 2:
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if (do_deluser) {
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/* "deluser USER" */
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struct passwd *pw;
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pw = xgetpwnam(name); /* bail out if USER is wrong */
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pfile = bb_path_passwd_file;
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if (ENABLE_FEATURE_SHADOWPASSWDS)
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sfile = bb_path_shadow_file;
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if (opt_delhome)
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remove_file(pw->pw_dir, FILEUTILS_RECUR);
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} else {
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struct group *gr;
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do_delgroup:
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/* "delgroup GROUP" or "delgroup USER GROUP" */
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if (do_deluser < 0) { /* delgroup after deluser? */
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gr = getgrnam(name);
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if (!gr)
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return EXIT_SUCCESS;
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} else {
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gr = xgetgrnam(name); /* bail out if GROUP is wrong */
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}
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if (!member) {
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/* "delgroup GROUP" */
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struct passwd *pw;
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/* Check if the group is in use */
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while ((pw = getpwent()) != NULL) {
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if (pw->pw_gid == gr->gr_gid)
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bb_error_msg_and_die("'%s' still has '%s' as their primary group!",
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pw->pw_name, name);
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}
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//endpwent();
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}
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pfile = bb_path_group_file;
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if (ENABLE_FEATURE_SHADOWPASSWDS)
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sfile = bb_path_gshadow_file;
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}
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/* Modify pfile, then sfile */
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do {
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if (update_passwd(pfile, name, NULL, member) == -1)
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return EXIT_FAILURE;
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if (ENABLE_FEATURE_SHADOWPASSWDS) {
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pfile = sfile;
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sfile = NULL;
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}
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} while (ENABLE_FEATURE_SHADOWPASSWDS && pfile);
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if (do_deluser > 0) {
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/* Delete user from all groups */
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if (update_passwd(bb_path_group_file, NULL, NULL, name) == -1)
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return EXIT_FAILURE;
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if (ENABLE_DELGROUP) {
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/* "deluser USER" also should try to delete
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* same-named group. IOW: do "delgroup USER"
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*/
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// On debian deluser is a perl script that calls userdel.
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// From man userdel:
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// If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will
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// delete the group with the same name as the user.
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do_deluser = -1;
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goto do_delgroup;
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}
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}
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return EXIT_SUCCESS;
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}
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/* Reached only if number of command line args is wrong */
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bb_show_usage();
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}
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