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
33 /* where to start and stop deletion */
39 /* An interesting side-effect of boundary()'s
40 * implementation is that the first user (typically root)
41 * cannot be removed. Let's call it a feature. */
42 static inline Bounds boundary(const char *buffer, const char *login)
49 snprintf(needle, 256, "\n%s:", login);
51 start = strstr(buffer, needle);
59 stop = index(start, '\n'); /* index is a BSD-ism */
60 b.start = start - buffer;
61 b.stop = stop - buffer;
65 /* grep -v ^login (except it only deletes the first match) */
66 /* ...in fact, I think I'm going to simplify this later */
67 int del_line_matching(const char *login, const char *filename)
75 /* load into buffer */
76 passwd = fopen(filename, "r");
80 stat(filename, &statbuf);
81 len = statbuf.st_size;
82 buffer = (char *) malloc(len * sizeof(char));
88 fread(buffer, len, sizeof(char), passwd);
92 /* find the user to remove */
93 b = boundary(buffer, login);
99 /* write the file w/o the user */
100 passwd = fopen(filename, "w");
104 fwrite(buffer, (b.start - 1), sizeof(char), passwd);
105 fwrite(&buffer[b.stop], (len - b.stop), sizeof(char), passwd);
113 /* $Id: delline.c,v 1.2 2003/07/14 21:50:51 andersen Exp $ */