267 lines
6.7 KiB
C
267 lines
6.7 KiB
C
/*-
|
|
* Copyright (c) 1988, 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. 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static 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[] = "From: @(#)chpass.c 8.4 (Berkeley) 4/2/94";
|
|
static char rcsid[] =
|
|
"$Id: chpass.c,v 1.5 1995/09/02 03:56:17 wpaul Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/signal.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <pw_scan.h>
|
|
#include <pw_util.h>
|
|
#include "pw_copy.h"
|
|
#ifdef YP
|
|
#include "pw_yp.h"
|
|
#endif
|
|
|
|
#include "chpass.h"
|
|
#include "pathnames.h"
|
|
|
|
char *progname = "chpass";
|
|
char *tempname;
|
|
uid_t uid;
|
|
|
|
void baduser __P((void));
|
|
void usage __P((void));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
enum { NEWSH, LOADENTRY, EDITENTRY, NEWPW } op;
|
|
struct passwd *pw, lpw;
|
|
int ch, pfd, tfd;
|
|
char *arg;
|
|
#ifdef YP
|
|
int force_local = 0;
|
|
int force_yp = 0;
|
|
#endif
|
|
|
|
op = EDITENTRY;
|
|
#ifdef YP
|
|
while ((ch = getopt(argc, argv, "a:p:s:ly")) != EOF)
|
|
#else
|
|
while ((ch = getopt(argc, argv, "a:p:s:")) != EOF)
|
|
#endif
|
|
switch(ch) {
|
|
case 'a':
|
|
op = LOADENTRY;
|
|
arg = optarg;
|
|
break;
|
|
case 's':
|
|
op = NEWSH;
|
|
arg = optarg;
|
|
break;
|
|
case 'p':
|
|
op = NEWPW;
|
|
arg = optarg;
|
|
break;
|
|
#ifdef YP
|
|
case 'l':
|
|
force_local = 1;
|
|
break;
|
|
case 'y':
|
|
force_yp = 1;
|
|
break;
|
|
#endif
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
uid = getuid();
|
|
|
|
if (op == EDITENTRY || op == NEWSH || op == NEWPW)
|
|
switch(argc) {
|
|
case 0:
|
|
if (!(pw = getpwuid(uid)))
|
|
errx(1, "unknown user: uid %u", uid);
|
|
break;
|
|
case 1:
|
|
if (!(pw = getpwnam(*argv)))
|
|
errx(1, "unknown user: %s", *argv);
|
|
if (uid && uid != pw->pw_uid)
|
|
baduser();
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
#ifdef YP
|
|
pw->pw_name = strdup(pw->pw_name);
|
|
_use_yp = use_yp(pw->pw_name);
|
|
if (_use_yp == USER_YP_ONLY) {
|
|
if (!force_local) {
|
|
_use_yp = 1;
|
|
pw = (struct passwd *)&yp_password;
|
|
} else
|
|
errx(1, "unknown local user: %s.", pw->pw_name);
|
|
} else if (_use_yp == USER_LOCAL_ONLY) {
|
|
if (!force_yp) {
|
|
_use_yp = 0;
|
|
pw = (struct passwd *)&local_password;
|
|
} else
|
|
errx(1, "unknown NIS user: %s.", pw->pw_name);
|
|
} else if (_use_yp == USER_YP_AND_LOCAL) {
|
|
if (!force_local) {
|
|
_use_yp = 1;
|
|
pw = (struct passwd *)&yp_password;
|
|
} else {
|
|
_use_yp = 0;
|
|
pw = (struct passwd *)&local_password;
|
|
}
|
|
}
|
|
#endif /* YP */
|
|
|
|
if (op == NEWSH) {
|
|
/* protect p_shell -- it thinks NULL is /bin/sh */
|
|
if (!arg[0])
|
|
usage();
|
|
if (p_shell(arg, pw, (ENTRY *)NULL))
|
|
pw_error((char *)NULL, 0, 1);
|
|
}
|
|
|
|
if (op == LOADENTRY) {
|
|
if (uid)
|
|
baduser();
|
|
pw = &lpw;
|
|
if (!pw_scan(arg, pw))
|
|
exit(1);
|
|
}
|
|
|
|
if (op == NEWPW) {
|
|
if (uid)
|
|
baduser();
|
|
|
|
if(strchr(arg, ':')) {
|
|
errx(1, "invalid format for password");
|
|
}
|
|
pw->pw_passwd = arg;
|
|
}
|
|
|
|
/*
|
|
* The temporary file/file descriptor usage is a little tricky here.
|
|
* 1: We start off with two fd's, one for the master password
|
|
* file (used to lock everything), and one for a temporary file.
|
|
* 2: Display() gets an fp for the temporary file, and copies the
|
|
* user's information into it. It then gives the temporary file
|
|
* to the user and closes the fp, closing the underlying fd.
|
|
* 3: The user edits the temporary file some number of times.
|
|
* 4: Verify() gets an fp for the temporary file, and verifies the
|
|
* contents. It can't use an fp derived from the step #2 fd,
|
|
* because the user's editor may have created a new instance of
|
|
* the file. Once the file is verified, its contents are stored
|
|
* in a password structure. The verify routine closes the fp,
|
|
* closing the underlying fd.
|
|
* 5: Delete the temporary file.
|
|
* 6: Get a new temporary file/fd. Pw_copy() gets an fp for it
|
|
* file and copies the master password file into it, replacing
|
|
* the user record with a new one. We can't use the first
|
|
* temporary file for this because it was owned by the user.
|
|
* Pw_copy() closes its fp, flushing the data and closing the
|
|
* underlying file descriptor. We can't close the master
|
|
* password fp, or we'd lose the lock.
|
|
* 7: Call pw_mkdb() (which renames the temporary file) and exit.
|
|
* The exit closes the master passwd fp/fd.
|
|
*/
|
|
pw_init();
|
|
pfd = pw_lock();
|
|
tfd = pw_tmp();
|
|
|
|
if (op == EDITENTRY) {
|
|
display(tfd, pw);
|
|
edit(pw);
|
|
(void)unlink(tempname);
|
|
tfd = pw_tmp();
|
|
}
|
|
|
|
#ifdef YP
|
|
if (_use_yp) {
|
|
yp_submit(pw);
|
|
(void)unlink(tempname);
|
|
} else {
|
|
#endif /* YP */
|
|
pw_copy(pfd, tfd, pw);
|
|
|
|
if (!pw_mkdb())
|
|
pw_error((char *)NULL, 0, 1);
|
|
#ifdef YP
|
|
}
|
|
#endif /* YP */
|
|
exit(0);
|
|
}
|
|
|
|
void
|
|
baduser()
|
|
{
|
|
errx(1, "%s", strerror(EACCES));
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
#ifdef YP
|
|
"usage: chpass [-l] [-y] [-a list] [-p encpass] [-s shell] [user]\n");
|
|
#else
|
|
"usage: chpass [-a list] [-p encpass] [-s shell] [user]\n");
|
|
#endif
|
|
exit(1);
|
|
}
|