2023-08-11 09:11:00 +00:00
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/* $OpenBSD: vipw.c,v 1.27 2023/08/11 04:45:05 guenther Exp $ */
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2023-04-30 01:15:27 +00:00
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/*
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* Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <util.h>
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void copyfile(int, int, struct stat *);
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__dead void usage(void);
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int
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main(int argc, char *argv[])
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{
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int pfd, tfd;
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struct stat begin, end;
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int ch;
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while ((ch = getopt(argc, argv, "")) != -1) {
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switch (ch) {
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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usage();
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if (unveil(_PATH_MASTERPASSWD_LOCK, "rwc") == -1)
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err(1, "unveil %s", _PATH_MASTERPASSWD_LOCK);
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if (unveil(_PATH_MASTERPASSWD, "r") == -1)
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err(1, "unveil %s", _PATH_MASTERPASSWD);
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if (unveil(_PATH_BSHELL, "x") == -1)
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err(1, "unveil %s", _PATH_BSHELL);
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if (unveil(_PATH_PWD_MKDB, "x") == -1)
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err(1, "unveil %s", _PATH_PWD_MKDB);
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if (pledge("stdio rpath wpath cpath fattr proc exec", NULL) == -1)
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err(1, "pledge");
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pw_init();
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tfd = pw_lock(0);
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if (tfd == -1)
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errx(1, "the passwd file is busy or you cannot lock.");
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pfd = open(_PATH_MASTERPASSWD, O_RDONLY);
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if (pfd == -1)
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pw_error(_PATH_MASTERPASSWD, 1, 1);
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copyfile(pfd, tfd, &begin);
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(void)close(tfd);
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for (;;) {
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pw_edit(0, NULL);
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if (stat(_PATH_MASTERPASSWD_LOCK, &end))
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pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
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2023-08-11 09:11:00 +00:00
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if (timespeccmp(&begin.st_mtim, &end.st_mtim, ==) &&
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2023-04-30 01:15:27 +00:00
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begin.st_size == end.st_size) {
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warnx("no changes made");
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pw_error((char *)NULL, 0, 0);
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}
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if (pw_mkdb(NULL, 0) == 0)
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break;
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pw_prompt();
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}
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return 0;
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}
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void
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copyfile(int from, int to, struct stat *sb)
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{
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int nr, nw, off;
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char buf[8*1024];
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struct timespec ts[2];
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if (fstat(from, sb) == -1)
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pw_error(_PATH_MASTERPASSWD, 1, 1);
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while ((nr = read(from, buf, sizeof(buf))) > 0)
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for (off = 0; nr > 0; nr -= nw, off += nw)
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if ((nw = write(to, buf + off, nr)) == -1)
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pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
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if (nr == -1)
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pw_error(_PATH_MASTERPASSWD, 1, 1);
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ts[0] = sb->st_atim;
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ts[1] = sb->st_mtim;
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(void)futimens(to, ts);
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}
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__dead void
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usage(void)
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{
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extern char *__progname;
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(void)fprintf(stderr, "usage: %s\n", __progname);
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exit(1);
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}
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