field.c revision 1.2 1 /*
2 * Copyright (c) 1988 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifndef lint
35 /*static char sccsid[] = "from: @(#)field.c 5.13 (Berkeley) 2/12/91";*/
36 static char rcsid[] = "$Id: field.c,v 1.2 1993/08/01 18:17:57 mycroft Exp $";
37 #endif /* not lint */
38
39 #include <sys/param.h>
40 #include <pwd.h>
41 #include <grp.h>
42 #include <string.h>
43 #include <stdio.h>
44 #include <ctype.h>
45 #include "chpass.h"
46 #include "pathnames.h"
47
48 /* ARGSUSED */
49 p_login(p, pw, ep)
50 char *p;
51 struct passwd *pw;
52 ENTRY *ep;
53 {
54 if (!*p) {
55 (void)fprintf(stderr, "chpass: empty login field.\n");
56 return(1);
57 }
58 if (*p == '-') {
59 (void)fprintf(stderr,
60 "chpass: login names may not begin with a hyphen.\n");
61 return(1);
62 }
63 if (!(pw->pw_name = strdup(p))) {
64 (void)fprintf(stderr, "chpass: can't save entry.\n");
65 return(1);
66 }
67 if (index(p, '.'))
68 (void)fprintf(stderr,
69 "chpass: \'.\' is dangerous in a login name.\n");
70 for (; *p; ++p)
71 if (isupper(*p)) {
72 (void)fprintf(stderr,
73 "chpass: upper-case letters are dangerous in a login name.\n");
74 break;
75 }
76 return(0);
77 }
78
79 /* ARGSUSED */
80 p_passwd(p, pw, ep)
81 char *p;
82 struct passwd *pw;
83 ENTRY *ep;
84 {
85 if (!*p)
86 pw->pw_passwd = ""; /* "NOLOGIN"; */
87 else if (!(pw->pw_passwd = strdup(p))) {
88 (void)fprintf(stderr, "chpass: can't save password entry.\n");
89 return(1);
90 }
91
92 return(0);
93 }
94
95 /* ARGSUSED */
96 p_uid(p, pw, ep)
97 register char *p;
98 struct passwd *pw;
99 ENTRY *ep;
100 {
101 int id;
102
103 if (!*p) {
104 (void)fprintf(stderr, "chpass: empty uid field.\n");
105 return(1);
106 }
107 if (!isdigit(*p)) {
108 (void)fprintf(stderr, "chpass: illegal uid.\n");
109 return(1);
110 }
111 id = atoi(p);
112 if ((u_int)id > USHRT_MAX) {
113 (void)fprintf(stderr, "chpass: %d > max uid value (%d).\n",
114 id, USHRT_MAX);
115 return(1);
116 }
117 pw->pw_uid = id;
118 return(0);
119 }
120
121 /* ARGSUSED */
122 p_gid(p, pw, ep)
123 register char *p;
124 struct passwd *pw;
125 ENTRY *ep;
126 {
127 struct group *gr;
128 int id;
129
130 if (!*p) {
131 (void)fprintf(stderr, "chpass: empty gid field.\n");
132 return(1);
133 }
134 if (!isdigit(*p)) {
135 if (!(gr = getgrnam(p))) {
136 (void)fprintf(stderr,
137 "chpass: unknown group %s.\n", p);
138 return(1);
139 }
140 pw->pw_gid = gr->gr_gid;
141 return(0);
142 }
143 id = atoi(p);
144 if ((u_int)id > USHRT_MAX) {
145 (void)fprintf(stderr, "chpass: %d > max gid value (%d).\n",
146 id, USHRT_MAX);
147 return(1);
148 }
149 pw->pw_gid = id;
150 return(0);
151 }
152
153 /* ARGSUSED */
154 p_class(p, pw, ep)
155 char *p;
156 struct passwd *pw;
157 ENTRY *ep;
158 {
159 if (!*p)
160 pw->pw_class = "";
161 else if (!(pw->pw_class = strdup(p))) {
162 (void)fprintf(stderr, "chpass: can't save entry.\n");
163 return(1);
164 }
165
166 return(0);
167 }
168
169 /* ARGSUSED */
170 p_change(p, pw, ep)
171 char *p;
172 struct passwd *pw;
173 ENTRY *ep;
174 {
175 if (!atot(p, &pw->pw_change))
176 return(0);
177 (void)fprintf(stderr, "chpass: illegal date for change field.\n");
178 return(1);
179 }
180
181 /* ARGSUSED */
182 p_expire(p, pw, ep)
183 char *p;
184 struct passwd *pw;
185 ENTRY *ep;
186 {
187 if (!atot(p, &pw->pw_expire))
188 return(0);
189 (void)fprintf(stderr, "chpass: illegal date for expire field.\n");
190 return(1);
191 }
192
193 /* ARGSUSED */
194 p_gecos(p, pw, ep)
195 char *p;
196 struct passwd *pw;
197 ENTRY *ep;
198 {
199 if (!*p)
200 ep->save = "";
201 else if (!(ep->save = strdup(p))) {
202 (void)fprintf(stderr, "chpass: can't save entry.\n");
203 return(1);
204 }
205 return(0);
206 }
207
208 /* ARGSUSED */
209 p_hdir(p, pw, ep)
210 char *p;
211 struct passwd *pw;
212 ENTRY *ep;
213 {
214 if (!*p) {
215 (void)fprintf(stderr, "chpass: empty home directory field.\n");
216 return(1);
217 }
218 if (!(pw->pw_dir = strdup(p))) {
219 (void)fprintf(stderr, "chpass: can't save entry.\n");
220 return(1);
221 }
222 return(0);
223 }
224
225 /* ARGSUSED */
226 p_shell(p, pw, ep)
227 register char *p;
228 struct passwd *pw;
229 ENTRY *ep;
230 {
231 char *t, *ok_shell();
232
233 if (!*p) {
234 pw->pw_shell = _PATH_BSHELL;
235 return(0);
236 }
237 /* only admin can change from or to "restricted" shells */
238 if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) {
239 (void)fprintf(stderr,
240 "chpass: %s: current shell non-standard.\n", pw->pw_shell);
241 return(1);
242 }
243 if (!(t = ok_shell(p))) {
244 if (uid) {
245 (void)fprintf(stderr,
246 "chpass: %s: non-standard shell.\n", p);
247 return(1);
248 }
249 }
250 else
251 p = t;
252 if (!(pw->pw_shell = strdup(p))) {
253 (void)fprintf(stderr, "chpass: can't save entry.\n");
254 return(1);
255 }
256 return(0);
257 }
258