[unix-history] / usr / src / usr.sbin / pwd_mkdb / pwd_mkdb.c

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)pwd_mkdb.c	5.5 (Berkeley) 5/6/91";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <signal.h>
#include <fcntl.h>
#include <db.h>
#include <pwd.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>

#define	INSECURE	1
#define	SECURE		2
#define	PERM_INSECURE	(S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
#define	PERM_SECURE	(S_IRUSR|S_IWUSR)

char *progname = "pwd_mkdb";

static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
static struct passwd pwd;			/* password structure */
static char *pname;				/* password file name */

main(argc, argv)
	int argc;
	char **argv;
{
	extern int optind;
	register int len, makeold;
	register char *p, *t;
	FILE *fp, *oldfp;
	DB *dp, *edp;
	sigset_t set;
	DBT data, key;
	int ch, cnt, tfd;
	char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024];

	makeold = 0;
	while ((ch = getopt(argc, argv, "pv")) != EOF)
		switch(ch) {
		case 'p':			/* create V7 "file.orig" */
			makeold = 1;
			break;
		case 'v':			/* backward compatible */
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	if (argc != 1)
		usage();

	/*
	 * This could be done to allow the user to interrupt.  Probably
	 * not worth the effort.
	 */
	sigemptyset(&set);
	sigaddset(&set, SIGTSTP);
	sigaddset(&set, SIGHUP);
	sigaddset(&set, SIGINT);
	sigaddset(&set, SIGQUIT);
	sigaddset(&set, SIGTERM);
	(void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);

	pname = *argv;
	/* Open the original password file */
	if (!(fp = fopen(pname, "r")))
		error(pname);

	/* Open the temporary insecure password database. */
	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
	dp = hash_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE, NULL);
	if (!dp)
		error(buf);
	clean = FILE_INSECURE;

	/* Open the temporary encrypted password database. */
	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
	edp = hash_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_SECURE, NULL);
	if (!edp)
		error(buf);
	clean = FILE_SECURE;

	/*
	 * Open file for old password file.  Minor trickiness -- don't want to
	 * chance the file already existing, since someone (stupidly) might
	 * still be using this for permission checking.  So, open it first and
	 * fdopen the resulting fd.  Don't really care who reads it.
	 */
	if (makeold) {
		(void)sprintf(buf, "%s.orig", pname);
		if ((tfd = open(buf,
		    O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0)
			error(buf);
		if (!(oldfp = fdopen(tfd, "w")))
			error(buf);
		clean = FILE_ORIG;
	}

	/*
	 * The databases actually contain three copies of the original data.
	 * Each password file entry is converted into a rough approximation
	 * of a ``struct passwd'', with the strings placed inline.  This
	 * object is then stored as the data for three separate keys.  The
	 * first key * is the pw_name field prepended by the _PW_KEYBYNAME
	 * character.  The second key is the pw_uid field prepended by the
	 * _PW_KEYBYUID character.  The third key is the line number in the
	 * original file prepended by the _PW_KEYBYNUM character.  (The special
	 * characters are prepended to ensure that the keys do not collide.)
	 */
	data.data = (u_char *)buf;
	key.data = (u_char *)tbuf;
	for (cnt = 1; scan(fp, &pwd); ++cnt) {
#define	COMPACT(e)	t = e; while (*p++ = *t++);
		/* Create insecure data. */
		p = buf;
		COMPACT(pwd.pw_name);
		COMPACT("*");
		bcopy((char *)&pwd.pw_uid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_gid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
		p += sizeof(time_t);
		COMPACT(pwd.pw_class);
		COMPACT(pwd.pw_gecos);
		COMPACT(pwd.pw_dir);
		COMPACT(pwd.pw_shell);
		bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
		p += sizeof(time_t);
		data.size = p - buf;

		/* Store insecure by name. */
		tbuf[0] = _PW_KEYBYNAME;
		len = strlen(pwd.pw_name);
		bcopy(pwd.pw_name, tbuf + 1, len);
		key.size = len + 1;
		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Store insecure by number. */
		tbuf[0] = _PW_KEYBYNUM;
		bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
		key.size = sizeof(cnt) + 1;
		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Store insecure by uid. */
		tbuf[0] = _PW_KEYBYUID;
		bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
		key.size = sizeof(pwd.pw_uid) + 1;
		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Create secure data. */
		p = buf;
		COMPACT(pwd.pw_name);
		COMPACT(pwd.pw_passwd);
		bcopy((char *)&pwd.pw_uid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_gid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
		p += sizeof(time_t);
		COMPACT(pwd.pw_class);
		COMPACT(pwd.pw_gecos);
		COMPACT(pwd.pw_dir);
		COMPACT(pwd.pw_shell);
		bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
		p += sizeof(time_t);
		data.size = p - buf;

		/* Store secure by name. */
		tbuf[0] = _PW_KEYBYNAME;
		len = strlen(pwd.pw_name);
		bcopy(pwd.pw_name, tbuf + 1, len);
		key.size = len + 1;
		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Store secure by number. */
		tbuf[0] = _PW_KEYBYNUM;
		bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
		key.size = sizeof(cnt) + 1;
		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Store secure by uid. */
		tbuf[0] = _PW_KEYBYUID;
		bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
		key.size = sizeof(pwd.pw_uid) + 1;
		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Create original format password file entry */
		if (makeold)
			(void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n",
			    pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos,
			    pwd.pw_dir, pwd.pw_shell);
	}
	(void)(dp->close)(dp);
	(void)(edp->close)(edp);
	if (makeold) {
		(void)fsync(oldfp);
		(void)fclose(oldfp);
	}

	/* Set master.passwd permissions, in case caller forgot. */
	(void)fchmod(fileno(fp), S_IRUSR|S_IWUSR);
	(void)fclose(fp);

	/* Install as the real password files. */
	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
	mv(buf, _PATH_MP_DB);
	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
	mv(buf, _PATH_SMP_DB);
	if (makeold) {
		(void)sprintf(buf, "%s.orig", pname);
		mv(buf, _PATH_PASSWD);
	}
	/*
	 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
	 * all use flock(2) on it to block other incarnations of themselves.
	 * The rename means that everything is unlocked, as the original file
	 * can no longer be accessed.
	 */
	mv(pname, _PATH_MASTERPASSWD);
	exit(0);
}

scan(fp, pw)
	FILE *fp;
	struct passwd *pw;
{
	static int lcnt;
	static char line[LINE_MAX];
	char *p;

	if (!fgets(line, sizeof(line), fp))
		return(0);
	++lcnt;
	/*
	 * ``... if I swallow anything evil, put your fingers down my
	 * throat...''
	 *	-- The Who
	 */
	if (!(p = index(line, '\n'))) {
		(void)fprintf(stderr, "pwd_mkdb: line too long\n");
		goto fmt;

	}
	*p = '\0';
	if (!pw_scan(line, pw)) {
		(void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt);
fmt:		errno = EFTYPE;
		error(pname);
		exit(1);
	}
}

mv(from, to)
	char *from, *to;
{
	int sverrno;
	char buf[MAXPATHLEN];

	if (rename(from, to)) {
		sverrno = errno;
		(void)sprintf(buf, "%s to %s", from, to);
		errno = sverrno;
		error(buf);
	}
}

error(name)
	char *name;
{
	(void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno));
	cleanup();
	exit(1);
}

cleanup()
{
	char buf[MAXPATHLEN];

	switch(clean) {
	case FILE_ORIG:
		(void)sprintf(buf, "%s.orig", pname);
		(void)unlink(buf);
		/* FALLTHROUGH */
	case FILE_SECURE:
		(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
		(void)unlink(buf);
		/* FALLTHROUGH */
	case FILE_INSECURE:
		(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
		(void)unlink(buf);
	}
}

usage()
{
	(void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n");
	exit(1);
}
Commit	Line	Data
3463ac72 WJ	1	/*-
	2	* Copyright (c) 1991 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#ifndef lint
	35	char copyright[] =
	36	"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
	37	All rights reserved.\n";
	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	static char sccsid[] = "@(#)pwd_mkdb.c 5.5 (Berkeley) 5/6/91";
	42	#endif /* not lint */
	43
	44	#include <sys/param.h>
	45	#include <sys/stat.h>
	46	#include <signal.h>
	47	#include <fcntl.h>
	48	#include <db.h>
	49	#include <pwd.h>
	50	#include <errno.h>
	51	#include <limits.h>
	52	#include <stdio.h>
	53	#include <string.h>
	54
	55	#define INSECURE 1
	56	#define SECURE 2
	57	#define PERM_INSECURE (S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH)
	58	#define PERM_SECURE (S_IRUSR\|S_IWUSR)
	59
	60	char *progname = "pwd_mkdb";
	61
	62	static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
	63	static struct passwd pwd; /* password structure */
	64	static char pname; / password file name */
65
66	main(argc, argv)
67	int argc;
68	char **argv;
69	{
70	extern int optind;
71	register int len, makeold;
72	register char p, t;
73	FILE fp, oldfp;
74	DB dp, edp;
75	sigset_t set;
76	DBT data, key;
77	int ch, cnt, tfd;
78	char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024];
79
80	makeold = 0;
81	while ((ch = getopt(argc, argv, "pv")) != EOF)
82	switch(ch) {
83	case 'p': /* create V7 "file.orig" */
84	makeold = 1;
85	break;
86	case 'v': /* backward compatible */
87	break;
88	case '?':
89	default:
90	usage();
91	}
92	argc -= optind;
93	argv += optind;
94
95	if (argc != 1)
96	usage();
97
98	/*
99	* This could be done to allow the user to interrupt. Probably
100	* not worth the effort.
101	*/
102	sigemptyset(&set);
103	sigaddset(&set, SIGTSTP);
104	sigaddset(&set, SIGHUP);
105	sigaddset(&set, SIGINT);
106	sigaddset(&set, SIGQUIT);
107	sigaddset(&set, SIGTERM);
108	(void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
109
110	pname = *argv;
111	/* Open the original password file */
112	if (!(fp = fopen(pname, "r")))
113	error(pname);
114
115	/* Open the temporary insecure password database. */
116	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
117	dp = hash_open(buf, O_WRONLY\|O_CREAT\|O_EXCL, PERM_INSECURE, NULL);
118	if (!dp)
119	error(buf);
120	clean = FILE_INSECURE;
121
122	/* Open the temporary encrypted password database. */
123	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
124	edp = hash_open(buf, O_WRONLY\|O_CREAT\|O_EXCL, PERM_SECURE, NULL);
125	if (!edp)
126	error(buf);
127	clean = FILE_SECURE;
128
129	/*
130	* Open file for old password file. Minor trickiness -- don't want to
131	* chance the file already existing, since someone (stupidly) might
132	* still be using this for permission checking. So, open it first and
133	* fdopen the resulting fd. Don't really care who reads it.
134	*/
135	if (makeold) {
136	(void)sprintf(buf, "%s.orig", pname);
137	if ((tfd = open(buf,
138	O_WRONLY\|O_CREAT\|O_EXCL, PERM_INSECURE)) < 0)
139	error(buf);
140	if (!(oldfp = fdopen(tfd, "w")))
141	error(buf);
142	clean = FILE_ORIG;
143	}
144
145	/*
146	* The databases actually contain three copies of the original data.
147	* Each password file entry is converted into a rough approximation
148	* of a ``struct passwd'', with the strings placed inline. This
149	* object is then stored as the data for three separate keys. The
150	* first key * is the pw_name field prepended by the _PW_KEYBYNAME
151	* character. The second key is the pw_uid field prepended by the
152	* _PW_KEYBYUID character. The third key is the line number in the
153	* original file prepended by the _PW_KEYBYNUM character. (The special
154	* characters are prepended to ensure that the keys do not collide.)
155	*/
156	data.data = (u_char *)buf;
157	key.data = (u_char *)tbuf;
158	for (cnt = 1; scan(fp, &pwd); ++cnt) {
159	#define COMPACT(e) t = e; while (p++ = t++);
160	/* Create insecure data. */
161	p = buf;
162	COMPACT(pwd.pw_name);
163	COMPACT("*");
164	bcopy((char *)&pwd.pw_uid, p, sizeof(int));
165	p += sizeof(int);
166	bcopy((char *)&pwd.pw_gid, p, sizeof(int));
167	p += sizeof(int);
168	bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
169	p += sizeof(time_t);
170	COMPACT(pwd.pw_class);
171	COMPACT(pwd.pw_gecos);
172	COMPACT(pwd.pw_dir);
173	COMPACT(pwd.pw_shell);
174	bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
175	p += sizeof(time_t);
176	data.size = p - buf;
177
178	/* Store insecure by name. */
179	tbuf[0] = _PW_KEYBYNAME;
180	len = strlen(pwd.pw_name);
181	bcopy(pwd.pw_name, tbuf + 1, len);
182	key.size = len + 1;
183	if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
184	error("put");
185
186	/* Store insecure by number. */
187	tbuf[0] = _PW_KEYBYNUM;
188	bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
189	key.size = sizeof(cnt) + 1;
190	if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
191	error("put");
192
193	/* Store insecure by uid. */
194	tbuf[0] = _PW_KEYBYUID;
195	bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
196	key.size = sizeof(pwd.pw_uid) + 1;
197	if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
198	error("put");
199
200	/* Create secure data. */
201	p = buf;
202	COMPACT(pwd.pw_name);
203	COMPACT(pwd.pw_passwd);
204	bcopy((char *)&pwd.pw_uid, p, sizeof(int));
205	p += sizeof(int);
206	bcopy((char *)&pwd.pw_gid, p, sizeof(int));
207	p += sizeof(int);
208	bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
209	p += sizeof(time_t);
210	COMPACT(pwd.pw_class);
211	COMPACT(pwd.pw_gecos);
212	COMPACT(pwd.pw_dir);
213	COMPACT(pwd.pw_shell);
214	bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
215	p += sizeof(time_t);
216	data.size = p - buf;
217
218	/* Store secure by name. */
219	tbuf[0] = _PW_KEYBYNAME;
220	len = strlen(pwd.pw_name);
221	bcopy(pwd.pw_name, tbuf + 1, len);
222	key.size = len + 1;
223	if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
224	error("put");
225
226	/* Store secure by number. */
227	tbuf[0] = _PW_KEYBYNUM;
228	bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
229	key.size = sizeof(cnt) + 1;
230	if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
231	error("put");
232
233	/* Store secure by uid. */
234	tbuf[0] = _PW_KEYBYUID;
235	bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
236	key.size = sizeof(pwd.pw_uid) + 1;
237	if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
238	error("put");
239
240	/* Create original format password file entry */
241	if (makeold)
242	(void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n",
243	pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos,
244	pwd.pw_dir, pwd.pw_shell);
245	}
246	(void)(dp->close)(dp);
247	(void)(edp->close)(edp);
248	if (makeold) {
249	(void)fsync(oldfp);
250	(void)fclose(oldfp);
251	}
252
253	/* Set master.passwd permissions, in case caller forgot. */
254	(void)fchmod(fileno(fp), S_IRUSR\|S_IWUSR);
255	(void)fclose(fp);
256
257	/* Install as the real password files. */
258	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
259	mv(buf, _PATH_MP_DB);
260	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
261	mv(buf, _PATH_SMP_DB);
262	if (makeold) {
263	(void)sprintf(buf, "%s.orig", pname);
264	mv(buf, _PATH_PASSWD);
265	}
266	/*
267	* Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
268	* all use flock(2) on it to block other incarnations of themselves.
269	* The rename means that everything is unlocked, as the original file
270	* can no longer be accessed.
271	*/
272	mv(pname, _PATH_MASTERPASSWD);
273	exit(0);
274	}
275
276	scan(fp, pw)
277	FILE *fp;
278	struct passwd *pw;
279	{
280	static int lcnt;
281	static char line[LINE_MAX];
282	char *p;
283
284	if (!fgets(line, sizeof(line), fp))
285	return(0);
286	++lcnt;
287	/*
288	* ``... if I swallow anything evil, put your fingers down my
289	* throat...''
290	* -- The Who
291	*/
292	if (!(p = index(line, '\n'))) {
293	(void)fprintf(stderr, "pwd_mkdb: line too long\n");
294	goto fmt;
295
296	}
297	*p = '\0';
298	if (!pw_scan(line, pw)) {
299	(void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt);
300	fmt: errno = EFTYPE;
301	error(pname);
302	exit(1);
303	}
304	}
305
306	mv(from, to)
307	char from, to;
308	{
309	int sverrno;
310	char buf[MAXPATHLEN];
311
312	if (rename(from, to)) {
313	sverrno = errno;
314	(void)sprintf(buf, "%s to %s", from, to);
315	errno = sverrno;
316	error(buf);
317	}
318	}
319
320	error(name)
321	char *name;
322	{
323	(void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno));
324	cleanup();
325	exit(1);
326	}
327
328	cleanup()
329	{
330	char buf[MAXPATHLEN];
331
332	switch(clean) {
333	case FILE_ORIG:
334	(void)sprintf(buf, "%s.orig", pname);
335	(void)unlink(buf);
336	/* FALLTHROUGH */
337	case FILE_SECURE:
338	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
339	(void)unlink(buf);
340	/* FALLTHROUGH */
341	case FILE_INSECURE:
342	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
343	(void)unlink(buf);
344	}
345	}
346
347	usage()
348	{
349	(void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n");
350	exit(1);
351	}