1 /* $NetBSD: yppasswdd_mkpw.c,v 1.18 2011/08/30 17:06:22 plunky 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 1.18 2011/08/30 17:06:22 plunky 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
62 int handling_request; /* simple mutex */
63
64 void
make_passwd(yppasswd * argp,struct svc_req * rqstp,SVCXPRT * transp)65 make_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