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/* $OpenBSD: passwd.c,v 1.25 2009/10/27 23:59:41 deraadt Exp $ */
/*
* Copyright (c) 1988 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include <rpcsvc/ypclnt.h>
#if defined(KRB5)
#include <sys/stat.h>
#endif
/*
* Note on configuration:
* Generally one would not use both Kerberos and YP
* to maintain passwords.
*
*/
int use_kerberos;
int use_yp;
#ifdef YP
int force_yp;
#endif
extern int local_passwd(char *, int);
extern int yp_passwd(char *);
extern int krb5_passwd(int, char **);
extern int _yp_check(char **);
void usage(int retval);
int
main(int argc, char **argv)
{
extern int optind;
char *username;
int ch;
#ifdef YP
int status = 0;
#endif
#if defined(KRB5)
char *ccfile;
struct stat sb;
if (!(ccfile = getenv("KRB5CCNAME")))
if (asprintf(&ccfile, "/tmp/krb5cc_%u", (unsigned)getuid()) ==
-1)
errx(1, "out of memory");
if ((stat(ccfile, &sb) == 0) && (sb.st_uid == getuid()))
use_kerberos = 1;
#endif
#ifdef YP
use_yp = _yp_check(NULL);
if (use_yp) {
char *dom;
yp_get_default_domain(&dom);
yp_unbind(dom);
}
#endif
/* Process args and options */
while ((ch = getopt(argc, argv, "lyK")) != -1)
switch (ch) {
case 'l': /* change local password file */
use_kerberos = 0;
use_yp = 0;
break;
case 'K':
#if defined(KRB5)
/* Skip programname and '-K' option */
argc -= 2;
argv += 2;
exit(krb5_passwd(argc, argv));
#else
errx(1, "KerberosV support not enabled");
break;
#endif
case 'y': /* change YP password */
#ifdef YP
if (!use_yp) {
fprintf(stderr, "passwd: YP not in use.\n");
exit(1);
}
use_kerberos = 0;
use_yp = 1;
force_yp = 1;
break;
#else
fprintf(stderr, "passwd: YP not compiled in\n");
exit(1);
#endif
default:
usage(1);
}
argc -= optind;
argv += optind;
username = getlogin();
if (username == NULL) {
fprintf(stderr, "passwd: who are you ??\n");
exit(1);
}
switch (argc) {
case 0:
break;
case 1:
username = argv[0];
break;
default:
usage(1);
}
#if defined(KRB5)
if (use_kerberos)
exit(krb5_passwd(argc, argv));
#endif
#ifdef YP
if (force_yp || ((status = local_passwd(username, 0)) && use_yp))
exit(yp_passwd(username));
exit(status);
#else
exit(local_passwd(username, 0));
#endif
}
void
usage(int retval)
{
fprintf(stderr, "usage: passwd [-K | -l | -y] [user]\n");
exit(retval);
}
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