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/* $OpenBSD: vipw.c,v 1.18 2015/10/16 22:54:15 deraadt 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/time.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 <util.h>
void copyfile(int, int, struct stat *);
void usage(void);
int
main(int argc, char *argv[])
{
int pfd, tfd;
struct stat begin, end;
int ch;
while ((ch = getopt(argc, argv, "")) != -1) {
switch (ch) {
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
if (pledge("stdio rpath wpath cpath fattr proc exec", NULL) == -1)
err(1, "pledge");
pw_init();
tfd = pw_lock(0);
if (tfd < 0)
errx(1, "the passwd file is busy or you cannot lock.");
pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
if (pfd < 0)
pw_error(_PATH_MASTERPASSWD, 1, 1);
copyfile(pfd, tfd, &begin);
(void)close(tfd);
for (;;) {
pw_edit(0, NULL);
if (stat(_PATH_MASTERPASSWD_LOCK, &end))
pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
if (timespeccmp(&begin.st_mtimespec, &end.st_mtimespec, ==) &&
begin.st_size == end.st_size) {
warnx("no changes made");
pw_error((char *)NULL, 0, 0);
}
if (pw_mkdb(NULL, 0) == 0)
break;
pw_prompt();
}
exit(0);
}
void
copyfile(int from, int to, struct stat *sb)
{
int nr, nw, off;
char buf[8*1024];
struct timespec ts[2];
if (fstat(from, sb) == -1)
pw_error(_PATH_MASTERPASSWD, 1, 1);
while ((nr = read(from, buf, sizeof(buf))) > 0)
for (off = 0; nr > 0; nr -= nw, off += nw)
if ((nw = write(to, buf + off, nr)) < 0)
pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
if (nr < 0)
pw_error(_PATH_MASTERPASSWD, 1, 1);
ts[0] = sb->st_atim;
ts[1] = sb->st_mtim;
(void)futimens(to, ts);
}
void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: %s\n", __progname);
exit(1);
}
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