1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 *
22 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
27 /* All Rights Reserved */
28
29 /*
30 * Portions of this source code were derived from Berkeley
31 * under license from the Regents of the University of
32 * California.
33 */
34
35 /*
36 * YP updater for public key map
37 */
38 #include <stdio.h>
39 #include <rpc/rpc.h>
40 #include <rpcsvc/ypclnt.h>
41 #include <sys/file.h>
42
43 extern char *malloc();
44
45 int
main(argc,argv)46 main(argc, argv)
47 int argc;
48 char *argv[];
49 {
50 unsigned op;
51 char name[MAXNETNAMELEN + 1];
52 char key[256];
53 char data[256];
54 char line[256];
55 unsigned keylen;
56 unsigned datalen;
57 FILE *rf;
58 FILE *wf;
59 char *fname;
60 char *tmpname;
61 int err;
62
63
64 if (argc != 3) {
65 exit(YPERR_YPERR);
66 }
67 fname = argv[1];
68 tmpname = malloc(strlen(fname) + 4);
69 if (tmpname == NULL) {
70 exit(YPERR_YPERR);
71 }
72 sprintf(tmpname, "%s.tmp", fname);
73
74 /*
75 * Get input
76 */
77 if (! scanf("%s\n", name)) {
78 exit(YPERR_YPERR);
79 }
80 if (! scanf("%u\n", &op)) {
81 exit(YPERR_YPERR);
82 }
83 if (! scanf("%u\n", &keylen)) {
84 exit(YPERR_YPERR);
85 }
86 if (! fread(key, keylen, 1, stdin)) {
87 exit(YPERR_YPERR);
88 }
89 key[keylen] = 0;
90 if (! scanf("%u\n", &datalen)) {
91 exit(YPERR_YPERR);
92 }
93 if (! fread(data, datalen, 1, stdin)) {
94 exit(YPERR_YPERR);
95 }
96 data[datalen] = 0;
97
98 /*
99 * Check permission
100 */
101 if (strcmp(name, key) != 0) {
102 exit(YPERR_ACCESS);
103 }
104 if (strcmp(name, "nobody") == 0) {
105 /*
106 * Can't change "nobody"s key.
107 */
108 exit(YPERR_ACCESS);
109 }
110
111 /*
112 * Open files
113 */
114 rf = fopen(fname, "r");
115 if (rf == NULL) {
116 exit(YPERR_YPERR);
117 }
118 wf = fopen(tmpname, "w");
119 if (wf == NULL) {
120 exit(YPERR_YPERR);
121 }
122 err = -1;
123 while (fgets(line, sizeof (line), rf)) {
124 if (err < 0 && match(line, name)) {
125 switch (op) {
126 case YPOP_INSERT:
127 err = YPERR_KEY;
128 break;
129 case YPOP_STORE:
130 case YPOP_CHANGE:
131 fprintf(wf, "%s %s\n", key, data);
132 err = 0;
133 break;
134 case YPOP_DELETE:
135 /* do nothing */
136 err = 0;
137 break;
138 }
139 } else {
140 fputs(line, wf);
141 }
142 }
143 if (err < 0) {
144 switch (op) {
145 case YPOP_CHANGE:
146 case YPOP_DELETE:
147 err = YPERR_KEY;
148 break;
149 case YPOP_INSERT:
150 case YPOP_STORE:
151 err = 0;
152 fprintf(wf, "%s %s\n", key, data);
153 break;
154 }
155 }
156 fclose(wf);
157 fclose(rf);
158 if (err == 0) {
159 if (rename(tmpname, fname) < 0) {
160 exit(YPERR_YPERR);
161 }
162 } else {
163 if (unlink(tmpname) < 0) {
164 exit(YPERR_YPERR);
165 }
166 }
167 if (fork() == 0) {
168 close(0); close(1); close(2);
169 open("/dev/null", O_RDWR, 0);
170 dup(0); dup(0);
171 execl("/bin/sh", "sh", "-c", argv[2], NULL);
172 }
173 return (err);
174 /* NOTREACHED */
175 }
176
177
178 int
match(line,name)179 match(line, name)
180 char *line;
181 char *name;
182 {
183 int len;
184
185 len = strlen(name);
186 return (strncmp(line, name, len) == 0 &&
187 (line[len] == ' ' || line[len] == '\t'));
188 }
189