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1.2 ! deraadt 1: /* $OpenBSD: field.c,v 1.3 1995/03/26 04:55:28 glass Exp $ */
1.1 deraadt 2: /* $NetBSD: field.c,v 1.3 1995/03/26 04:55:28 glass Exp $ */
3:
4: /*
5: * Copyright (c) 1988, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: #if 0
39: static char sccsid[] = "@(#)field.c 8.4 (Berkeley) 4/2/94";
40: #else
1.2 ! deraadt 41: static char rcsid[] = "$OpenBSD: field.c,v 1.3 1995/03/26 04:55:28 glass Exp $";
1.1 deraadt 42: #endif
43: #endif /* not lint */
44:
45: #include <sys/param.h>
46:
47: #include <ctype.h>
48: #include <err.h>
49: #include <errno.h>
50: #include <grp.h>
51: #include <pwd.h>
52: #include <stdio.h>
53: #include <stdlib.h>
54: #include <string.h>
55: #include <unistd.h>
56:
57: #include "chpass.h"
58: #include "pathnames.h"
59:
60: /* ARGSUSED */
61: int
62: p_login(p, pw, ep)
63: char *p;
64: struct passwd *pw;
65: ENTRY *ep;
66: {
67: if (!*p) {
68: warnx("empty login field");
69: return (1);
70: }
71: if (*p == '-') {
72: warnx("login names may not begin with a hyphen");
73: return (1);
74: }
75: if (!(pw->pw_name = strdup(p))) {
76: warnx("can't save entry");
77: return (1);
78: }
79: if (strchr(p, '.'))
80: warnx("\'.\' is dangerous in a login name");
81: for (; *p; ++p)
82: if (isupper(*p)) {
83: warnx("upper-case letters are dangerous in a login name");
84: break;
85: }
86: return (0);
87: }
88:
89: /* ARGSUSED */
90: int
91: p_passwd(p, pw, ep)
92: char *p;
93: struct passwd *pw;
94: ENTRY *ep;
95: {
96: if (!*p)
97: pw->pw_passwd = ""; /* "NOLOGIN"; */
98: else if (!(pw->pw_passwd = strdup(p))) {
99: warnx("can't save password entry");
100: return (1);
101: }
102:
103: return (0);
104: }
105:
106: /* ARGSUSED */
107: int
108: p_uid(p, pw, ep)
109: char *p;
110: struct passwd *pw;
111: ENTRY *ep;
112: {
113: uid_t id;
114: char *np;
115:
116: if (!*p) {
117: warnx("empty uid field");
118: return (1);
119: }
120: if (!isdigit(*p)) {
121: warnx("illegal uid");
122: return (1);
123: }
124: errno = 0;
125: id = strtoul(p, &np, 10);
126: if (*np || (id == ULONG_MAX && errno == ERANGE)) {
127: warnx("illegal uid");
128: return (1);
129: }
130: pw->pw_uid = id;
131: return (0);
132: }
133:
134: /* ARGSUSED */
135: int
136: p_gid(p, pw, ep)
137: char *p;
138: struct passwd *pw;
139: ENTRY *ep;
140: {
141: struct group *gr;
142: gid_t id;
143: char *np;
144:
145: if (!*p) {
146: warnx("empty gid field");
147: return (1);
148: }
149: if (!isdigit(*p)) {
150: if (!(gr = getgrnam(p))) {
151: warnx("unknown group %s", p);
152: return (1);
153: }
154: pw->pw_gid = gr->gr_gid;
155: return (0);
156: }
157: errno = 0;
158: id = strtoul(p, &np, 10);
159: if (*np || (id == ULONG_MAX && errno == ERANGE)) {
160: warnx("illegal gid");
161: return (1);
162: }
163: pw->pw_gid = id;
164: return (0);
165: }
166:
167: /* ARGSUSED */
168: int
169: p_class(p, pw, ep)
170: char *p;
171: struct passwd *pw;
172: ENTRY *ep;
173: {
174: if (!*p)
175: pw->pw_class = "";
176: else if (!(pw->pw_class = strdup(p))) {
177: warnx("can't save entry");
178: return (1);
179: }
180:
181: return (0);
182: }
183:
184: /* ARGSUSED */
185: int
186: p_change(p, pw, ep)
187: char *p;
188: struct passwd *pw;
189: ENTRY *ep;
190: {
191: if (!atot(p, &pw->pw_change))
192: return (0);
193: warnx("illegal date for change field");
194: return (1);
195: }
196:
197: /* ARGSUSED */
198: int
199: p_expire(p, pw, ep)
200: char *p;
201: struct passwd *pw;
202: ENTRY *ep;
203: {
204: if (!atot(p, &pw->pw_expire))
205: return (0);
206: warnx("illegal date for expire field");
207: return (1);
208: }
209:
210: /* ARGSUSED */
211: int
212: p_gecos(p, pw, ep)
213: char *p;
214: struct passwd *pw;
215: ENTRY *ep;
216: {
217: if (!*p)
218: ep->save = "";
219: else if (!(ep->save = strdup(p))) {
220: warnx("can't save entry");
221: return (1);
222: }
223: return (0);
224: }
225:
226: /* ARGSUSED */
227: int
228: p_hdir(p, pw, ep)
229: char *p;
230: struct passwd *pw;
231: ENTRY *ep;
232: {
233: if (!*p) {
234: warnx("empty home directory field");
235: return (1);
236: }
237: if (!(pw->pw_dir = strdup(p))) {
238: warnx("can't save entry");
239: return (1);
240: }
241: return (0);
242: }
243:
244: /* ARGSUSED */
245: int
246: p_shell(p, pw, ep)
247: char *p;
248: struct passwd *pw;
249: ENTRY *ep;
250: {
251: char *t, *ok_shell();
252:
253: if (!*p) {
254: pw->pw_shell = _PATH_BSHELL;
255: return (0);
256: }
257: /* only admin can change from or to "restricted" shells */
258: if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) {
259: warnx("%s: current shell non-standard", pw->pw_shell);
260: return (1);
261: }
262: if (!(t = ok_shell(p))) {
263: if (uid) {
264: warnx("%s: non-standard shell", p);
265: return (1);
266: }
267: }
268: else
269: p = t;
270: if (!(pw->pw_shell = strdup(p))) {
271: warnx("can't save entry");
272: return (1);
273: }
274: return (0);
275: }