1/*	$NetBSD: yppasswdd_mkpw.c,v 1.17 2009/10/20 00:51:14 snj Exp $	*/
2
3/*
4 * Copyright (c) 1996 Jason R. Thorpe <thorpej@NetBSD.org>
5 * All rights reserved.
6 *
7 * Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__RCSID("$NetBSD: yppasswdd_mkpw.c,v 1.17 2009/10/20 00:51:14 snj Exp $");
35#endif /* not lint */
36
37#include <sys/types.h>
38#include <sys/param.h>
39#include <sys/stat.h>
40#include <sys/time.h>
41#include <sys/resource.h>
42#include <sys/wait.h>
43
44#include <err.h>
45#include <errno.h>
46#include <fcntl.h>
47#include <stdio.h>
48#include <pwd.h>
49#include <signal.h>
50#include <stdlib.h>
51#include <string.h>
52#include <unistd.h>
53#include <util.h>
54#include <limits.h>
55
56#include <rpc/rpc.h>
57#include <rpc/xdr.h>
58#include <rpcsvc/yppasswd.h>
59
60#include "extern.h"
61
62int	handling_request;		/* simple mutex */
63
64void
65make_passwd(yppasswd *argp, struct svc_req *rqstp, SVCXPRT *transp)
66{
67	struct passwd pw;
68	int pfd, tfd;
69	char mpwd[MAXPATHLEN];
70	char buf[8192]; /* from libutil */
71	char *p;
72	int lineno;
73	FILE *fpw;
74
75#define REPLY(val)	do { \
76		int res = (val); \
77		if (!svc_sendreply(transp, (xdrproc_t)xdr_int, (caddr_t)&res)) \
78			svcerr_systemerr(transp); \
79	} while (0)
80
81#define RETURN(val)	do { \
82		REPLY((val)); \
83		handling_request = 0; \
84		return; \
85	} while (0)
86
87	if (handling_request) {
88		warnx("already handling request; try again later");
89		REPLY(1);
90		return;
91	}
92	handling_request = 1;
93
94	(void)strlcpy(mpwd, pw_getprefix(), sizeof(mpwd));
95	(void)strlcat(mpwd, _PATH_MASTERPASSWD, sizeof(mpwd));
96	fpw = fopen(mpwd, "r");
97	if (fpw == NULL) {
98		warnx("%s", mpwd);
99		RETURN(1);
100	}
101	for(lineno = 1; ; lineno++) {
102		if (fgets(buf, sizeof(buf), fpw) == NULL) {
103			if (feof(fpw))
104				warnx("%s: %s not found", mpwd,
105				    argp->newpw.pw_name);
106			else
107				warnx("%s: %s", mpwd, strerror(errno));
108			(void)fclose(fpw);
109			RETURN(1);
110		}
111		if ((p = strchr(buf, '\n')) == NULL) {
112			warnx("line %d too long", lineno);
113			(void)fclose(fpw);
114			RETURN(1);
115		}
116		/* get rid of trailing \n */
117		*p = '\0';
118		if (pw_scan(buf, &pw, NULL) == 0)
119			continue;
120		if (strncmp(argp->newpw.pw_name, pw.pw_name, MAXLOGNAME) == 0)
121			break;
122	}
123	fclose(fpw);
124	if (*pw.pw_passwd &&
125	    strcmp(crypt(argp->oldpass, pw.pw_passwd), pw.pw_passwd) != 0)
126		RETURN(1);
127
128	pw_init();
129	tfd = pw_lock(0);
130	if (tfd < 0) {
131		warnx("the passwd file is busy.");
132		RETURN(1);
133	}
134	pfd = open(mpwd, O_RDONLY, 0);
135	if (pfd < 0) {
136		pw_abort();
137		warnx("%s", mpwd);
138		RETURN(1);
139	}
140
141	/*
142	 * Get the new password.  Reset passwd change time to zero; when
143	 * classes are implemented, go and get the "offset" value for this
144	 * class and reset the timer.
145	 */
146	if (!nopw) {
147		pw.pw_passwd = argp->newpw.pw_passwd;
148		pw.pw_change = 0;
149	}
150	if (!nogecos)
151		pw.pw_gecos = argp->newpw.pw_gecos;
152	if (!noshell)
153		pw.pw_shell = argp->newpw.pw_shell;
154
155	pw_copy(pfd, tfd, &pw, NULL);
156
157	if (pw_mkdb(pw.pw_name, 0) < 0) {
158		warnx("pw_mkdb failed");
159		pw_abort();
160		RETURN(1);
161	}
162
163	/* XXX RESTORE SIGNAL STATE? XXX */
164
165	/* Notify caller we succeeded. */
166	REPLY(0);
167
168	/* Update the YP maps. */
169	if (chdir("/var/yp"))
170		err(EXIT_FAILURE, "/var/yp");
171	(void) umask(022);
172	(void) system(make_arg);
173
174	handling_request = 0;
175}
176