/* vi: set sw=4 ts=4: */
/*
- * deluser (remove lusers from the system ;) for TinyLogin
+ * deluser/delgroup implementation for busybox
*
* Copyright (C) 1999 by Lineo, inc. and John Beppu
* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
+ * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
*
*/
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "busybox.h"
-
+#include "libbb.h"
-#include "delline.c"
+/* Status */
+#define STATUS_OK 0
+#define NAME_NOT_FOUND 1
+#define MEMBER_NOT_FOUND 2
-static const char deluser_format[]="%s: User could not be removed from %s";
-
-int deluser_main(int argc, char **argv)
+static void del_line_matching(char **args,
+ const char *filename,
+ FILE* FAST_FUNC (*fopen_func)(const char *fileName, const char *mode))
{
- /* int successful; */
- int failure;
+ FILE *passwd;
+ smallint error = NAME_NOT_FOUND;
+ char *name = (ENABLE_FEATURE_DEL_USER_FROM_GROUP && args[2]) ? args[2] : args[1];
+ char *line, *del;
+ char *new = xzalloc(1);
- if (argc != 2) {
- bb_show_usage();
- } else {
+ passwd = fopen_func(filename, "r");
+ if (passwd) {
+ while ((line = xmalloc_fgets(passwd))) {
+ int len = strlen(name);
- failure = del_line_matching(argv[1], bb_path_passwd_file);
- if (failure) {
- bb_error_msg_and_die(deluser_format, argv[1], bb_path_passwd_file);
- }
-#ifdef CONFIG_FEATURE_SHADOWPASSWDS
- failure = del_line_matching(argv[1], bb_path_shadow_file);
- if (failure) {
- bb_error_msg_and_die(deluser_format, argv[1], bb_path_shadow_file);
- }
- failure = del_line_matching(argv[1], bb_path_gshadow_file);
- if (failure) {
- bb_error_msg_and_die(deluser_format, argv[1], bb_path_gshadow_file);
- }
-#endif
- failure = del_line_matching(argv[1], bb_path_group_file);
- if (failure) {
- bb_error_msg_and_die(deluser_format, argv[1], bb_path_group_file);
+ if (strncmp(line, name, len) == 0
+ && line[len] == ':'
+ ) {
+ error = STATUS_OK;
+ if (ENABLE_FEATURE_DEL_USER_FROM_GROUP) {
+ struct group *gr;
+ char *p;
+ if (args[2]
+ /* There were two args on commandline */
+ && (gr = getgrnam(name))
+ /* The group was not deleted in the meanwhile */
+ && (p = strrchr(line, ':'))
+ /* We can find a pointer to the last ':' */
+ ) {
+ error = MEMBER_NOT_FOUND;
+ /* Move past ':' (worst case to '\0') and cut the line */
+ p[1] = '\0';
+ /* Reuse p */
+ for (p = xzalloc(1); *gr->gr_mem != NULL; gr->gr_mem++) {
+ /* Add all the other group members */
+ if (strcmp(args[1], *gr->gr_mem) != 0) {
+ del = p;
+ p = xasprintf("%s%s%s", p, p[0] ? "," : "", *gr->gr_mem);
+ free(del);
+ } else
+ error = STATUS_OK;
+ }
+ /* Recompose the line */
+ line = xasprintf("%s%s\n", line, p);
+ if (ENABLE_FEATURE_CLEAN_UP) free(p);
+ } else
+ goto skip;
+ }
+ }
+ del = new;
+ new = xasprintf("%s%s", new, line);
+ free(del);
+ skip:
+ free(line);
}
+ if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
+
+ if (error) {
+ if (ENABLE_FEATURE_DEL_USER_FROM_GROUP && error == MEMBER_NOT_FOUND) {
+ /* Set the correct values for error message */
+ filename = name;
+ name = args[1];
+ }
+ bb_error_msg("can't find %s in %s", name, filename);
+ } else {
+ passwd = fopen_func(filename, "w");
+ if (passwd) {
+ fputs(new, passwd);
+ if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
+ }
+ }
}
- return (EXIT_SUCCESS);
+ free(new);
}
-/* $Id: deluser.c,v 1.4 2003/07/14 20:20:45 andersen Exp $ */
+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))
+ ) {
+ if (geteuid())
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+
+ if ((ENABLE_FEATURE_DEL_USER_FROM_GROUP && argc != 3)
+ || ENABLE_DELUSER
+ || (ENABLE_DELGROUP && ENABLE_DESKTOP)
+ ) {
+ if (ENABLE_DELUSER
+ && (!ENABLE_DELGROUP || applet_name[3] == 'u')
+ ) {
+ del_line_matching(argv, bb_path_passwd_file, xfopen);
+ if (ENABLE_FEATURE_SHADOWPASSWDS)
+ del_line_matching(argv, bb_path_shadow_file, fopen_or_warn);
+ } else if (ENABLE_DESKTOP && ENABLE_DELGROUP && getpwnam(argv[1]))
+ bb_error_msg_and_die("can't remove primary group of user %s", argv[1]);
+ }
+ del_line_matching(argv, bb_path_group_file, xfopen);
+ if (ENABLE_FEATURE_SHADOWPASSWDS)
+ del_line_matching(argv, bb_path_gshadow_file, fopen_or_warn);
+ return EXIT_SUCCESS;
+ } else
+ bb_show_usage();
+}
projects / oweals / busybox.git / blobdiff