FreeBSD-5.3/usr.bin/chpass/chpass.c
/*-
* Copyright (c) 1988, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* Portions of this software were developed for the FreeBSD Project by
* ThinkSec AS and NAI Labs, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
* ("CBOSS"), as part of the DARPA CHATS research program.
*
* 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.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1988, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)chpass.c 8.4 (Berkeley) 4/2/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/chpass/chpass.c,v 1.27 2004/01/18 21:46:39 charnier Exp $");
#include <sys/param.h>
#include <err.h>
#include <errno.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef YP
#include <ypclnt.h>
#endif
#include <pw_scan.h>
#include <libutil.h>
#include "chpass.h"
int master_mode;
static void baduser(void);
static void usage(void);
int
main(int argc, char *argv[])
{
enum { NEWSH, LOADENTRY, EDITENTRY, NEWPW, NEWEXP } op;
struct passwd lpw, *old_pw, *pw;
int ch, pfd, tfd;
const char *password;
char *arg = NULL;
uid_t uid;
#ifdef YP
struct ypclnt *ypclnt;
const char *yp_domain = NULL, *yp_host = NULL;
#endif
pw = old_pw = NULL;
op = EDITENTRY;
#ifdef YP
while ((ch = getopt(argc, argv, "a:p:s:e:d:h:loy")) != -1)
#else
while ((ch = getopt(argc, argv, "a:p:s:e:")) != -1)
#endif
switch (ch) {
case 'a':
op = LOADENTRY;
arg = optarg;
break;
case 's':
op = NEWSH;
arg = optarg;
break;
case 'p':
op = NEWPW;
arg = optarg;
break;
case 'e':
op = NEWEXP;
arg = optarg;
break;
#ifdef YP
case 'd':
yp_domain = optarg;
break;
case 'h':
yp_host = optarg;
break;
case 'l':
case 'o':
case 'y':
/* compatibility */
break;
#endif
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 1)
usage();
uid = getuid();
if (op == EDITENTRY || op == NEWSH || op == NEWPW || op == NEWEXP) {
if (argc == 0) {
if ((pw = getpwuid(uid)) == NULL)
errx(1, "unknown user: uid %lu",
(unsigned long)uid);
} else {
if ((pw = getpwnam(*argv)) == NULL)
errx(1, "unknown user: %s", *argv);
if (uid != 0 && uid != pw->pw_uid)
baduser();
}
/* Make a copy for later verification */
if ((pw = pw_dup(pw)) == NULL ||
(old_pw = pw_dup(pw)) == NULL)
err(1, "pw_dup");
}
#ifdef YP
if (pw != NULL && (pw->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host);
master_mode = (ypclnt != NULL &&
ypclnt_connect(ypclnt) != -1 &&
ypclnt_havepasswdd(ypclnt) == 1);
ypclnt_free(ypclnt);
} else
#endif
master_mode = (uid == 0);
if (op == NEWSH) {
/* protect p_shell -- it thinks NULL is /bin/sh */
if (!arg[0])
usage();
if (p_shell(arg, pw, (ENTRY *)NULL) == -1)
exit(1);
}
if (op == NEWEXP) {
if (uid) /* only root can change expire */
baduser();
if (p_expire(arg, pw, (ENTRY *)NULL) == -1)
exit(1);
}
if (op == LOADENTRY) {
if (uid)
baduser();
pw = &lpw;
old_pw = NULL;
if (!__pw_scan(arg, pw, _PWSCAN_WARN|_PWSCAN_MASTER))
exit(1);
}
if (op == NEWPW) {
if (uid)
baduser();
if (strchr(arg, ':'))
errx(1, "invalid format for password");
pw->pw_passwd = arg;
}
if (op == EDITENTRY) {
/*
* We don't really need pw_*() here, but pw_edit() (used
* by edit()) is just too useful...
*/
if (pw_init(NULL, NULL))
err(1, "pw_init()");
if ((tfd = pw_tmp(-1)) == -1) {
pw_fini();
err(1, "pw_tmp()");
}
free(pw);
pw = edit(pw_tempname(), old_pw);
pw_fini();
if (pw == NULL)
err(1, "edit()");
if (pw_equal(old_pw, pw))
errx(0, "user information unchanged");
}
if (old_pw && !master_mode) {
password = getpass("Password: ");
if (strcmp(crypt(password, old_pw->pw_passwd),
old_pw->pw_passwd) != 0)
baduser();
} else {
password = "";
}
if (old_pw != NULL)
pw->pw_fields |= (old_pw->pw_fields & _PWF_SOURCE);
switch (pw->pw_fields & _PWF_SOURCE) {
#ifdef YP
case _PWF_NIS:
ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host);
if (ypclnt == NULL ||
ypclnt_connect(ypclnt) == -1 ||
ypclnt_passwd(ypclnt, pw, password) == -1) {
warnx("%s", ypclnt->error);
ypclnt_free(ypclnt);
exit(1);
}
ypclnt_free(ypclnt);
errx(0, "NIS user information updated");
#endif /* YP */
case 0:
case _PWF_FILES:
if (pw_init(NULL, NULL))
err(1, "pw_init()");
if ((pfd = pw_lock()) == -1) {
pw_fini();
err(1, "pw_lock()");
}
if ((tfd = pw_tmp(-1)) == -1) {
pw_fini();
err(1, "pw_tmp()");
}
if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
pw_fini();
err(1, "pw_copy");
}
if (pw_mkdb(pw->pw_name) == -1) {
pw_fini();
err(1, "pw_mkdb()");
}
pw_fini();
errx(0, "user information updated");
break;
default:
errx(1, "unsupported passwd source");
}
}
static void
baduser(void)
{
errx(1, "%s", strerror(EACCES));
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: chpass%s %s [user]\n",
#ifdef YP
" [-d domain] [-h host]",
#else
"",
#endif
"[-a list] [-p encpass] [-s shell] [-e mmm dd yy]");
exit(1);
}