Annotation of src/usr.bin/chpass/field.c, Revision 1.4
1.4 ! deraadt 1: /* $OpenBSD: field.c,v 1.3 1998/05/29 22:26:46 downsj 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";
1.4 ! deraadt 40: #else
! 41: static char rcsid[] = "$OpenBSD: field.c,v 1.3 1998/05/29 22:26:46 downsj 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
1.4 ! deraadt 62: p_login(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 63: {
64: if (!*p) {
65: warnx("empty login field");
66: return (1);
67: }
68: if (*p == '-') {
69: warnx("login names may not begin with a hyphen");
70: return (1);
71: }
72: if (!(pw->pw_name = strdup(p))) {
73: warnx("can't save entry");
74: return (1);
75: }
76: if (strchr(p, '.'))
77: warnx("\'.\' is dangerous in a login name");
78: for (; *p; ++p)
79: if (isupper(*p)) {
80: warnx("upper-case letters are dangerous in a login name");
81: break;
82: }
83: return (0);
84: }
85:
86: /* ARGSUSED */
87: int
1.4 ! deraadt 88: p_passwd(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 89: {
90: if (!*p)
91: pw->pw_passwd = ""; /* "NOLOGIN"; */
92: else if (!(pw->pw_passwd = strdup(p))) {
93: warnx("can't save password entry");
94: return (1);
95: }
1.4 ! deraadt 96:
1.1 deraadt 97: return (0);
98: }
99:
100: /* ARGSUSED */
101: int
1.4 ! deraadt 102: p_uid(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 103: {
104: uid_t id;
105: char *np;
106:
107: if (!*p) {
108: warnx("empty uid field");
109: return (1);
110: }
111: if (!isdigit(*p)) {
112: warnx("illegal uid");
113: return (1);
114: }
115: errno = 0;
116: id = strtoul(p, &np, 10);
117: if (*np || (id == ULONG_MAX && errno == ERANGE)) {
118: warnx("illegal uid");
119: return (1);
120: }
121: pw->pw_uid = id;
122: return (0);
123: }
124:
125: /* ARGSUSED */
126: int
1.4 ! deraadt 127: p_gid(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 128: {
129: struct group *gr;
130: gid_t id;
131: char *np;
132:
133: if (!*p) {
134: warnx("empty gid field");
135: return (1);
136: }
137: if (!isdigit(*p)) {
138: if (!(gr = getgrnam(p))) {
139: warnx("unknown group %s", p);
140: return (1);
141: }
142: pw->pw_gid = gr->gr_gid;
143: return (0);
144: }
145: errno = 0;
146: id = strtoul(p, &np, 10);
147: if (*np || (id == ULONG_MAX && errno == ERANGE)) {
148: warnx("illegal gid");
149: return (1);
150: }
151: pw->pw_gid = id;
152: return (0);
153: }
154:
155: /* ARGSUSED */
156: int
1.4 ! deraadt 157: p_class(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 158: {
159: if (!*p)
160: pw->pw_class = "";
161: else if (!(pw->pw_class = strdup(p))) {
162: warnx("can't save entry");
163: return (1);
164: }
1.4 ! deraadt 165:
1.1 deraadt 166: return (0);
167: }
168:
169: /* ARGSUSED */
170: int
1.4 ! deraadt 171: p_change(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 172: {
173: if (!atot(p, &pw->pw_change))
174: return (0);
175: warnx("illegal date for change field");
176: return (1);
177: }
178:
179: /* ARGSUSED */
180: int
1.4 ! deraadt 181: p_expire(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 182: {
183: if (!atot(p, &pw->pw_expire))
184: return (0);
185: warnx("illegal date for expire field");
186: return (1);
187: }
188:
189: /* ARGSUSED */
190: int
1.4 ! deraadt 191: p_gecos(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 192: {
193: if (!*p)
194: ep->save = "";
195: else if (!(ep->save = strdup(p))) {
196: warnx("can't save entry");
197: return (1);
198: }
199: return (0);
200: }
201:
202: /* ARGSUSED */
203: int
1.4 ! deraadt 204: p_hdir(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 205: {
206: if (!*p) {
207: warnx("empty home directory field");
208: return (1);
209: }
210: if (!(pw->pw_dir = strdup(p))) {
211: warnx("can't save entry");
212: return (1);
213: }
214: return (0);
215: }
216:
217: /* ARGSUSED */
218: int
1.4 ! deraadt 219: p_shell(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 220: {
1.3 downsj 221: char *t;
1.1 deraadt 222:
223: if (!*p) {
224: pw->pw_shell = _PATH_BSHELL;
225: return (0);
226: }
227: /* only admin can change from or to "restricted" shells */
228: if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) {
229: warnx("%s: current shell non-standard", pw->pw_shell);
230: return (1);
231: }
232: if (!(t = ok_shell(p))) {
233: if (uid) {
234: warnx("%s: non-standard shell", p);
235: return (1);
236: }
1.4 ! deraadt 237: } else
1.1 deraadt 238: p = t;
239: if (!(pw->pw_shell = strdup(p))) {
240: warnx("can't save entry");
241: return (1);
242: }
243: return (0);
244: }
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