1 /* vi: set sw=4 ts=4: */
3 * deluser (remove lusers from the system ;) for TinyLogin
5 * Copyright (C) 1999 by Lineo, inc. and John Beppu
6 * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #define PASSWD_FILE "/etc/passwd"
32 #define GROUP_FILE "/etc/group"
33 #define SHADOW_FILE "/etc/shadow"
34 #define GSHADOW_FILE "/etc/gshadow"
37 /* where to start and stop deletion */
43 /* An interesting side-effect of boundary()'s
44 * implementation is that the first user (typically root)
45 * cannot be removed. Let's call it a feature. */
46 static inline Bounds boundary(const char *buffer, const char *login)
53 snprintf(needle, 256, "\n%s:", login);
55 start = strstr(buffer, needle);
63 stop = index(start, '\n'); /* index is a BSD-ism */
64 b.start = start - buffer;
65 b.stop = stop - buffer;
69 /* grep -v ^login (except it only deletes the first match) */
70 /* ...in fact, I think I'm going to simplify this later */
71 static int del_line_matching(const char *login, const char *filename)
79 /* load into buffer */
80 passwd = fopen(filename, "r");
84 stat(filename, &statbuf);
85 len = statbuf.st_size;
86 buffer = (char *) malloc(len * sizeof(char));
92 fread(buffer, len, sizeof(char), passwd);
96 /* find the user to remove */
97 b = boundary(buffer, login);
103 /* write the file w/o the user */
104 passwd = fopen(filename, "w");
108 fwrite(buffer, (b.start - 1), sizeof(char), passwd);
109 fwrite(&buffer[b.stop], (len - b.stop), sizeof(char), passwd);
116 /* ________________________________________________________________________ */
117 int delgroup_main(int argc, char **argv)
119 /* int successful; */
126 failure = del_line_matching(argv[1], GROUP_FILE);
127 #ifdef CONFIG_FEATURE_SHADOWPASSWDS
128 if (access(GSHADOW_FILE, W_OK) == 0) {
129 /* EDR the |= works if the error is not 0, so he had it wrong */
130 failure |= del_line_matching(argv[1], GSHADOW_FILE);
132 #endif /* CONFIG_FEATURE_SHADOWPASSWDS */
133 /* if (!successful) { */
135 error_msg_and_die("%s: Group could not be removed\n", argv[1]);
139 return (EXIT_SUCCESS);
142 /* ________________________________________________________________________ */
143 int deluser_main(int argc, char **argv)
145 /* int successful; */
152 failure = del_line_matching(argv[1], PASSWD_FILE);
153 /* if (!successful) { */
155 error_msg_and_die("%s: User could not be removed from %s\n",
156 argv[1], PASSWD_FILE);
158 #ifdef CONFIG_FEATURE_SHADOWPASSWDS
159 failure = del_line_matching(argv[1], SHADOW_FILE);
160 /* if (!successful) { */
162 error_msg_and_die("%s: User could not be removed from %s\n",
163 argv[1], SHADOW_FILE);
165 failure = del_line_matching(argv[1], GSHADOW_FILE);
166 /* if (!successful) { */
168 error_msg_and_die("%s: User could not be removed from %s\n",
169 argv[1], GSHADOW_FILE);
171 #endif /* CONFIG_FEATURE_SHADOWPASSWDS */
172 failure = del_line_matching(argv[1], GROUP_FILE);
173 /* if (!successful) { */
175 error_msg_and_die("%s: User could not be removed from %s\n",
176 argv[1], GROUP_FILE);
180 return (EXIT_SUCCESS);
183 /* $Id: deluser.c,v 1.1 2002/06/04 20:45:05 sandman Exp $ */