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NetBSD/usr.bin/chpass/pw_yp.c

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/* $NetBSD: pw_yp.c,v 1.17 2000/10/11 14:46:01 is 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)pw_yp.c 1.0 2/2/93";
#else
__RCSID("$NetBSD: pw_yp.c,v 1.17 2000/10/11 14:46:01 is Exp $");
#endif
#endif /* not lint */
#ifdef YP
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#define passwd yp_passwd_rec
#include <rpcsvc/yppasswd.h>
#undef passwd
#include "chpass.h"
static char *domain;
static struct passwd *interpret __P((struct passwd *, char *));
static char *pwskip __P((char *));
/*
* Check if rpc.yppasswdd is running on the master YP server.
* XXX this duplicates some code, but is much less complex
* than the alternative.
*/
int
check_yppasswdd()
{
char *master;
int rpcport;
/*
* Get local domain
*/
if (!domain && yp_get_default_domain(&domain) != 0)
return (1);
/*
* Find the host for the passwd map; it should be running
* the daemon.
*/
master = NULL;
if (yp_master(domain, "passwd.byname", &master) != 0) {
if (master != NULL)
free (master);
return (1);
}
/*
* Ask the portmapper for the port of the daemon.
*/
if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
IPPROTO_UDP)) == 0)
return (1);
/*
* Successful contact with rpc.yppasswdd.
*/
return (0);
}
int
pw_yp(pw, uid)
struct passwd *pw;
uid_t uid;
{
char *master;
int r, rpcport, status;
struct yppasswd yppasswd;
struct timeval tv;
CLIENT *client;
/*
* Get local domain
*/
if (!domain && (r = yp_get_default_domain(&domain)))
errx(1, "can't get local YP domain. Reason: %s",
yperr_string(r));
/*
* Find the host for the passwd map; it should be running
* the daemon.
*/
master = NULL;
if ((r = yp_master(domain, "passwd.byname", &master)) != 0) {
if (master)
free (master);
warnx("can't find the master YP server. Reason: %s",
yperr_string(r));
return (1);
}
/*
* Ask the portmapper for the port of the daemon.
*/
if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
IPPROTO_UDP)) == 0) {
warnx("master YP server not running yppasswd daemon.\n\t%s\n",
"Can't change password.");
return (1);
}
/*
* Be sure the port is privileged
*/
if (rpcport >= IPPORT_RESERVED) {
warnx("yppasswd daemon is on an invalid port.");
return (1);
}
/* prompt for old password */
memset(&yppasswd, 0, sizeof yppasswd);
yppasswd.oldpass = "none";
yppasswd.oldpass = getpass("Old password:");
if (!yppasswd.oldpass) {
warnx("Cancelled.");
return (1);
}
/* tell rpc.yppasswdd */
yppasswd.newpw.pw_name = strdup(pw->pw_name);
yppasswd.newpw.pw_passwd = strdup(pw->pw_passwd);
yppasswd.newpw.pw_uid = pw->pw_uid;
yppasswd.newpw.pw_gid = pw->pw_gid;
yppasswd.newpw.pw_gecos = strdup(pw->pw_gecos);
yppasswd.newpw.pw_dir = strdup(pw->pw_dir);
yppasswd.newpw.pw_shell = strdup(pw->pw_shell);
client = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp");
if (client == NULL) {
warnx("cannot contact yppasswdd on %s: Reason: %s",
master, yperr_string(YPERR_YPBIND));
return (1);
}
client->cl_auth = authunix_create_default();
tv.tv_sec = 5;
tv.tv_usec = 0;
r = clnt_call(client, YPPASSWDPROC_UPDATE,
xdr_yppasswd, &yppasswd, xdr_int, &status, tv);
if (r) {
warnx("rpc to yppasswdd failed.");
return (1);
} else if (status)
printf("Couldn't change YP password.\n");
else
printf("%s %s, %s\n",
"The YP password information has been changed on",
master, "the master YP passwd server.");
return (0);
}
static char *
pwskip(p)
char *p;
{
while (*p && *p != ':' && *p != '\n')
++p;
if (*p)
*p++ = 0;
return (p);
}
static struct passwd *
interpret(pwent, line)
struct passwd *pwent;
char *line;
{
char *p = line;
pwent->pw_passwd = "*";
pwent->pw_uid = 0;
pwent->pw_gid = 0;
pwent->pw_gecos = "";
pwent->pw_dir = "";
pwent->pw_shell = "";
pwent->pw_change = 0;
pwent->pw_expire = 0;
pwent->pw_class = "";
/* line without colon separators is no good, so ignore it */
if(!strchr(p,':'))
return(NULL);
pwent->pw_name = p;
p = pwskip(p);
pwent->pw_passwd = p;
p = pwskip(p);
pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
p = pwskip(p);
pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
p = pwskip(p);
pwent->pw_gecos = p;
p = pwskip(p);
pwent->pw_dir = p;
p = pwskip(p);
pwent->pw_shell = p;
while (*p && *p != '\n')
p++;
*p = '\0';
return (pwent);
}
struct passwd *
ypgetpwnam(nam)
const char *nam;
{
static struct passwd pwent;
static char line[1024];
char *val;
int reason, vallen;
/*
* Get local domain
*/
if (!domain && (reason = yp_get_default_domain(&domain)))
errx(1, "can't get local YP domain. Reason: %s",
yperr_string(reason));
val = NULL;
reason = yp_match(domain, "passwd.byname", nam, strlen(nam),
&val, &vallen);
if (reason != 0) {
if (val)
free (val);
return (NULL);
}
val[vallen] = '\0';
(void)strncpy(line, val, sizeof(line) - 1);
free(val);
return(interpret(&pwent, line));
}
struct passwd *
ypgetpwuid(uid)
uid_t uid;
{
static struct passwd pwent;
static char line[1024];
char *val;
int reason, vallen;
char namebuf[16];
if (!domain && (reason = yp_get_default_domain(&domain)))
errx(1, "can't get local YP domain. Reason: %s\n",
yperr_string(reason));
(void)snprintf(namebuf, sizeof namebuf, "%d", uid);
val = NULL;
reason = yp_match(domain, "passwd.byuid", namebuf, strlen(namebuf),
&val, &vallen);
if (reason != 0) {
if (val)
free (val);
return (NULL);
}
val[vallen] = '\0';
(void)strncpy(line, val, sizeof(line) - 1);
free(val);
return(interpret(&pwent, line));
}
void
yppw_error(name, err, eval)
const char *name;
int err, eval;
{
if (err) {
if (name)
warn("%s", name);
else
warn(NULL);
}
errx(eval, "YP passwd information unchanged");
}
void
yppw_prompt()
{
int c;
(void)printf("re-edit the password file? [y]: ");
(void)fflush(stdout);
c = getchar();
if (c != EOF && c != '\n')
while (getchar() != '\n');
if (c == 'n')
yppw_error(NULL, 0, 0);
}
#endif /* YP */
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