edit.c revision 1.17 1 1.17 dsl /* $NetBSD: edit.c,v 1.17 2004/10/30 17:11:24 dsl Exp $ */
2 1.4 glass
3 1.1 cgd /*-
4 1.4 glass * Copyright (c) 1990, 1993, 1994
5 1.4 glass * The Regents of the University of California. All rights reserved.
6 1.1 cgd *
7 1.1 cgd * Redistribution and use in source and binary forms, with or without
8 1.1 cgd * modification, are permitted provided that the following conditions
9 1.1 cgd * are met:
10 1.1 cgd * 1. Redistributions of source code must retain the above copyright
11 1.1 cgd * notice, this list of conditions and the following disclaimer.
12 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright
13 1.1 cgd * notice, this list of conditions and the following disclaimer in the
14 1.1 cgd * documentation and/or other materials provided with the distribution.
15 1.16 agc * 3. Neither the name of the University nor the names of its contributors
16 1.1 cgd * may be used to endorse or promote products derived from this software
17 1.1 cgd * without specific prior written permission.
18 1.1 cgd *
19 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 1.1 cgd * SUCH DAMAGE.
30 1.1 cgd */
31 1.1 cgd
32 1.9 lukem #include <sys/cdefs.h>
33 1.1 cgd #ifndef lint
34 1.4 glass #if 0
35 1.4 glass static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94";
36 1.4 glass #else
37 1.17 dsl __RCSID("$NetBSD: edit.c,v 1.17 2004/10/30 17:11:24 dsl Exp $");
38 1.4 glass #endif
39 1.1 cgd #endif /* not lint */
40 1.1 cgd
41 1.1 cgd #include <sys/param.h>
42 1.1 cgd #include <sys/stat.h>
43 1.4 glass
44 1.4 glass #include <ctype.h>
45 1.4 glass #include <err.h>
46 1.4 glass #include <errno.h>
47 1.4 glass #include <paths.h>
48 1.1 cgd #include <pwd.h>
49 1.1 cgd #include <stdio.h>
50 1.1 cgd #include <stdlib.h>
51 1.1 cgd #include <string.h>
52 1.4 glass #include <unistd.h>
53 1.15 christos #include <fcntl.h>
54 1.6 jtc #include <util.h>
55 1.4 glass
56 1.1 cgd #include "chpass.h"
57 1.1 cgd
58 1.1 cgd void
59 1.6 jtc edit(tempname, pw)
60 1.6 jtc char *tempname;
61 1.1 cgd struct passwd *pw;
62 1.1 cgd {
63 1.1 cgd struct stat begin, end;
64 1.1 cgd
65 1.1 cgd for (;;) {
66 1.1 cgd if (stat(tempname, &begin))
67 1.7 thorpej (*Pw_error)(tempname, 1, 1);
68 1.6 jtc pw_edit(1, tempname);
69 1.1 cgd if (stat(tempname, &end))
70 1.7 thorpej (*Pw_error)(tempname, 1, 1);
71 1.1 cgd if (begin.st_mtime == end.st_mtime) {
72 1.4 glass warnx("no changes made");
73 1.7 thorpej (*Pw_error)(NULL, 0, 0);
74 1.1 cgd }
75 1.6 jtc if (verify(tempname, pw))
76 1.1 cgd break;
77 1.7 thorpej #ifdef YP
78 1.7 thorpej if (use_yp)
79 1.7 thorpej yppw_prompt();
80 1.7 thorpej else
81 1.7 thorpej #endif
82 1.7 thorpej pw_prompt();
83 1.1 cgd }
84 1.1 cgd }
85 1.1 cgd
86 1.1 cgd /*
87 1.1 cgd * display --
88 1.1 cgd * print out the file for the user to edit; strange side-effect:
89 1.1 cgd * set conditional flag if the user gets to edit the shell.
90 1.1 cgd */
91 1.4 glass void
92 1.6 jtc display(tempname, fd, pw)
93 1.6 jtc char *tempname;
94 1.1 cgd int fd;
95 1.1 cgd struct passwd *pw;
96 1.1 cgd {
97 1.1 cgd FILE *fp;
98 1.9 lukem char *bp, *p;
99 1.11 christos char chgstr[256], expstr[256];
100 1.1 cgd
101 1.1 cgd if (!(fp = fdopen(fd, "w")))
102 1.7 thorpej (*Pw_error)(tempname, 1, 1);
103 1.1 cgd
104 1.1 cgd (void)fprintf(fp,
105 1.7 thorpej "#Changing user %sdatabase information for %s.\n",
106 1.7 thorpej use_yp ? "YP " : "", pw->pw_name);
107 1.1 cgd if (!uid) {
108 1.1 cgd (void)fprintf(fp, "Login: %s\n", pw->pw_name);
109 1.1 cgd (void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
110 1.1 cgd (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid);
111 1.1 cgd (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid);
112 1.1 cgd (void)fprintf(fp, "Change [month day year]: %s\n",
113 1.11 christos ttoa(chgstr, sizeof chgstr, pw->pw_change));
114 1.1 cgd (void)fprintf(fp, "Expire [month day year]: %s\n",
115 1.11 christos ttoa(expstr, sizeof expstr, pw->pw_expire));
116 1.1 cgd (void)fprintf(fp, "Class: %s\n", pw->pw_class);
117 1.1 cgd (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
118 1.1 cgd (void)fprintf(fp, "Shell: %s\n",
119 1.1 cgd *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
120 1.1 cgd }
121 1.1 cgd /* Only admin can change "restricted" shells. */
122 1.1 cgd else if (ok_shell(pw->pw_shell))
123 1.1 cgd /*
124 1.1 cgd * Make shell a restricted field. Ugly with a
125 1.1 cgd * necklace, but there's not much else to do.
126 1.1 cgd */
127 1.1 cgd (void)fprintf(fp, "Shell: %s\n",
128 1.1 cgd *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
129 1.1 cgd else
130 1.1 cgd list[E_SHELL].restricted = 1;
131 1.12 mycroft bp = strdup(pw->pw_gecos);
132 1.14 itojun if (!bp) {
133 1.14 itojun err(1, "strdup");
134 1.14 itojun /*NOTREACHED*/
135 1.14 itojun }
136 1.1 cgd p = strsep(&bp, ",");
137 1.1 cgd (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
138 1.1 cgd p = strsep(&bp, ",");
139 1.1 cgd (void)fprintf(fp, "Location: %s\n", p ? p : "");
140 1.1 cgd p = strsep(&bp, ",");
141 1.1 cgd (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
142 1.1 cgd p = strsep(&bp, ",");
143 1.1 cgd (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
144 1.1 cgd
145 1.1 cgd (void)fchown(fd, getuid(), getgid());
146 1.1 cgd (void)fclose(fp);
147 1.1 cgd }
148 1.1 cgd
149 1.4 glass int
150 1.6 jtc verify(tempname, pw)
151 1.6 jtc char *tempname;
152 1.1 cgd struct passwd *pw;
153 1.1 cgd {
154 1.4 glass ENTRY *ep;
155 1.4 glass char *p;
156 1.4 glass struct stat sb;
157 1.1 cgd FILE *fp;
158 1.15 christos int len, fd;
159 1.3 deraadt static char buf[LINE_MAX];
160 1.1 cgd
161 1.15 christos if ((fd = open(tempname, O_RDONLY|O_NOFOLLOW)) == -1 ||
162 1.15 christos (fp = fdopen(fd, "r")) == NULL)
163 1.7 thorpej (*Pw_error)(tempname, 1, 1);
164 1.15 christos if (fstat(fd, &sb))
165 1.7 thorpej (*Pw_error)(tempname, 1, 1);
166 1.15 christos if (sb.st_size == 0 || sb.st_nlink != 1) {
167 1.4 glass warnx("corrupted temporary file");
168 1.4 glass goto bad;
169 1.4 glass }
170 1.1 cgd while (fgets(buf, sizeof(buf), fp)) {
171 1.1 cgd if (!buf[0] || buf[0] == '#')
172 1.1 cgd continue;
173 1.4 glass if (!(p = strchr(buf, '\n'))) {
174 1.4 glass warnx("line too long");
175 1.1 cgd goto bad;
176 1.1 cgd }
177 1.1 cgd *p = '\0';
178 1.1 cgd for (ep = list;; ++ep) {
179 1.1 cgd if (!ep->prompt) {
180 1.4 glass warnx("unrecognized field");
181 1.1 cgd goto bad;
182 1.1 cgd }
183 1.1 cgd if (!strncasecmp(buf, ep->prompt, ep->len)) {
184 1.1 cgd if (ep->restricted && uid) {
185 1.4 glass warnx(
186 1.4 glass "you may not change the %s field",
187 1.4 glass ep->prompt);
188 1.1 cgd goto bad;
189 1.1 cgd }
190 1.4 glass if (!(p = strchr(buf, ':'))) {
191 1.4 glass warnx("line corrupted");
192 1.1 cgd goto bad;
193 1.1 cgd }
194 1.17 dsl while (isspace((unsigned char)*++p));
195 1.1 cgd if (ep->except && strpbrk(p, ep->except)) {
196 1.4 glass warnx(
197 1.4 glass "illegal character in the \"%s\" field",
198 1.1 cgd ep->prompt);
199 1.1 cgd goto bad;
200 1.1 cgd }
201 1.1 cgd if ((ep->func)(p, pw, ep)) {
202 1.1 cgd bad: (void)fclose(fp);
203 1.4 glass return (0);
204 1.1 cgd }
205 1.1 cgd break;
206 1.1 cgd }
207 1.1 cgd }
208 1.1 cgd }
209 1.1 cgd (void)fclose(fp);
210 1.1 cgd
211 1.1 cgd /* Build the gecos field. */
212 1.1 cgd len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
213 1.1 cgd strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
214 1.4 glass if (!(p = malloc(len)))
215 1.9 lukem err(1, "malloc");
216 1.12 mycroft (void)snprintf(p, len, "%s,%s,%s,%s", list[E_NAME].save,
217 1.1 cgd list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
218 1.12 mycroft pw->pw_gecos = p;
219 1.1 cgd
220 1.1 cgd if (snprintf(buf, sizeof(buf),
221 1.10 mrg "%s:%s:%d:%d:%s:%lu:%lu:%s:%s:%s",
222 1.1 cgd pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
223 1.10 mrg (u_long)pw->pw_change, (u_long)pw->pw_expire, pw->pw_gecos,
224 1.10 mrg pw->pw_dir, pw->pw_shell) >= sizeof(buf)) {
225 1.4 glass warnx("entries too long");
226 1.4 glass return (0);
227 1.1 cgd }
228 1.5 phil return (pw_scan(buf, pw, (int *)NULL));
229 1.1 cgd }
230