* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
* Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
*
- * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*
*/
+
+//usage:#define deluser_trivial_usage
+//usage: "USER"
+//usage:#define deluser_full_usage "\n\n"
+//usage: "Delete USER from the system"
+
+//usage:#define delgroup_trivial_usage
+//usage: IF_FEATURE_DEL_USER_FROM_GROUP("[USER] ")"GROUP"
+//usage:#define delgroup_full_usage "\n\n"
+//usage: "Delete group GROUP from the system"
+//usage: IF_FEATURE_DEL_USER_FROM_GROUP(" or user USER from group GROUP")
+
#include "libbb.h"
int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int deluser_main(int argc, char **argv)
{
- if (argc != 2
- && (!ENABLE_FEATURE_DEL_USER_FROM_GROUP
- || applet_name[3] != 'g'
- || argc != 3)
- ) {
- bb_show_usage();
- }
+ /* User or group name */
+ char *name;
+ /* Username (non-NULL only in "delgroup USER GROUP" case) */
+ char *member;
+ /* Name of passwd or group file */
+ const char *pfile;
+ /* Name of shadow or gshadow file */
+ const char *sfile;
+ /* Are we deluser or delgroup? */
+ int do_deluser = (ENABLE_DELUSER && (!ENABLE_DELGROUP || applet_name[3] == 'u'));
- if (geteuid())
+ if (geteuid() != 0)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
- if (ENABLE_DELUSER && applet_name[3] == 'u') {
- /* deluser USER */
- if (update_passwd(bb_path_passwd_file, argv[1], NULL, NULL) < 0)
- return EXIT_FAILURE;
- if (ENABLE_FEATURE_SHADOWPASSWDS)
- if (update_passwd(bb_path_shadow_file, argv[1], NULL, NULL) < 0)
- return EXIT_FAILURE;
- } else if (ENABLE_DELGROUP) {
- /* delgroup ... */
- if (!ENABLE_FEATURE_DEL_USER_FROM_GROUP || argc != 3) {
- /* delgroup GROUP */
- if (update_passwd(bb_path_group_file, argv[1], NULL, NULL) < 0)
- return EXIT_FAILURE;
+ name = argv[1];
+ member = NULL;
+
+ switch (argc) {
+ case 3:
+ if (!ENABLE_FEATURE_DEL_USER_FROM_GROUP || do_deluser)
+ break;
+ /* It's "delgroup USER GROUP" */
+ member = name;
+ name = argv[2];
+ /* Fallthrough */
+
+ case 2:
+ if (do_deluser) {
+ /* "deluser USER" */
+ xgetpwnam(name); /* bail out if USER is wrong */
+ pfile = bb_path_passwd_file;
if (ENABLE_FEATURE_SHADOWPASSWDS)
- if (update_passwd(bb_path_gshadow_file, argv[1], NULL, NULL) < 0)
- return EXIT_FAILURE;
+ sfile = bb_path_shadow_file;
} else {
- /* delgroup USER GROUP */
- if (update_passwd(bb_path_group_file, argv[2], NULL, argv[1]) < 0)
- return EXIT_FAILURE;
+ struct group *gr;
+ do_delgroup:
+ /* "delgroup GROUP" or "delgroup USER GROUP" */
+ if (do_deluser < 0) { /* delgroup after deluser? */
+ gr = getgrnam(name);
+ if (!gr)
+ return EXIT_SUCCESS;
+ } else {
+ gr = xgetgrnam(name); /* bail out if GROUP is wrong */
+ }
+ if (!member) {
+ /* "delgroup GROUP" */
+ struct passwd *pw;
+ struct passwd pwent;
+ /* Check if the group is in use */
+#define passwd_buf bb_common_bufsiz1
+ while (!getpwent_r(&pwent, passwd_buf, sizeof(passwd_buf), &pw)) {
+ if (pwent.pw_gid == gr->gr_gid)
+ bb_error_msg_and_die("'%s' still has '%s' as their primary group!", pwent.pw_name, name);
+ }
+ //endpwent();
+ }
+ pfile = bb_path_group_file;
if (ENABLE_FEATURE_SHADOWPASSWDS)
- if (update_passwd(bb_path_gshadow_file, argv[2], NULL, argv[1]) < 0)
- return EXIT_FAILURE;
+ sfile = bb_path_gshadow_file;
+ }
+
+ /* Modify pfile, then sfile */
+ do {
+ if (update_passwd(pfile, name, NULL, member) == -1)
+ return EXIT_FAILURE;
+ if (ENABLE_FEATURE_SHADOWPASSWDS) {
+ pfile = sfile;
+ sfile = NULL;
+ }
+ } while (ENABLE_FEATURE_SHADOWPASSWDS && pfile);
+
+ if (ENABLE_DELGROUP && do_deluser > 0) {
+ /* "deluser USER" also should try to delete
+ * same-named group. IOW: do "delgroup USER"
+ */
+// On debian deluser is a perl script that calls userdel.
+// From man userdel:
+// If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will
+// delete the group with the same name as the user.
+ do_deluser = -1;
+ goto do_delgroup;
}
+ return EXIT_SUCCESS;
}
- return EXIT_SUCCESS;
+ /* Reached only if number of command line args is wrong */
+ bb_show_usage();
}