* Copyright (c) 1987, 1993, 1994

/* $NetBSD: vipw.c,v 1.16 2011/08/31 16:25:00 plunky Exp $ */

/*
* Copyright (c) 1987, 1993, 1994
* 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. 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.
*/

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)vipw.c 8.3 (Berkeley) 4/2/94";
#else
__RCSID("$NetBSD: vipw.c,v 1.16 2011/08/31 16:25:00 plunky Exp $");
#endif
#endif /* not lint */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>

#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <util.h>

static void copyfile(int, int);
__dead static void usage(void);

static char mpwd[MAXPATHLEN], mpwdl[MAXPATHLEN];

int
main(int argc, char *argv[])
{
const char *prefix;
int pfd, tfd;
struct stat begin, end;
int ch;

prefix = "";
while ((ch = getopt(argc, argv, "d:")) != -1) {
switch (ch) {
case 'd':
prefix = optarg;
if (pw_setprefix(prefix) < 0)
err(1, "%s", prefix);
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;

if (argc != 0)
usage();

(void)snprintf(mpwd, sizeof(mpwd), "%s%s", prefix, _PATH_MASTERPASSWD);
(void)snprintf(mpwdl, sizeof(mpwdl), "%s%s", prefix,
_PATH_MASTERPASSWD_LOCK);

pw_init();
tfd = pw_lock(0);
if (tfd < 0) {
if (errno == EEXIST)
errx(1, "the passwd file is busy.");
else
err(1, "%s", mpwdl);
}

pfd = open(mpwd, O_RDONLY, 0);
if (pfd < 0)
pw_error(mpwd, 1, 1);
copyfile(pfd, tfd);
(void)close(tfd);

for (;;) {
if (stat(mpwdl, &begin))
pw_error(mpwdl, 1, 1);
pw_edit(0, NULL);
if (stat(mpwdl, &end))
pw_error(mpwdl, 1, 1);
if (begin.st_mtime == end.st_mtime &&
begin.st_mtimensec == end.st_mtimensec) {
warnx("no changes made");
pw_error(NULL, 0, 0);
}
if (pw_mkdb(NULL, 0) == 0)
break;
pw_prompt();
}
return 0;
}

static void
copyfile(int from, int to)
{
int nr, nw, off;
char buf[8*1024];

while ((nr = read(from, buf, sizeof(buf))) > 0)
for (off = 0; off < nr; nr -= nw, off += nw)
if ((nw = write(to, buf + off, nr)) < 0)
pw_error(mpwdl, 1, 1);
if (nr < 0)
pw_error(mpwd, 1, 1);
}

static void
usage(void)
{

(void)fprintf(stderr, "usage: %s [-d directory]\n", getprogname());
exit(1);
}