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c61fa9d9 WJ |
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[] = "@(#)field.c 5.13 (Berkeley) 2/12/91"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include <sys/param.h> | |
39 | #include <pwd.h> | |
40 | #include <grp.h> | |
41 | #include <string.h> | |
42 | #include <stdio.h> | |
43 | #include <ctype.h> | |
44 | #include "chpass.h" | |
45 | #include "pathnames.h" | |
46 | ||
47 | /* ARGSUSED */ | |
48 | p_login(p, pw, ep) | |
49 | char *p; | |
50 | struct passwd *pw; | |
51 | ENTRY *ep; | |
52 | { | |
53 | if (!*p) { | |
54 | (void)fprintf(stderr, "chpass: empty login field.\n"); | |
55 | return(1); | |
56 | } | |
57 | if (*p == '-') { | |
58 | (void)fprintf(stderr, | |
59 | "chpass: login names may not begin with a hyphen.\n"); | |
60 | return(1); | |
61 | } | |
62 | if (!(pw->pw_name = strdup(p))) { | |
63 | (void)fprintf(stderr, "chpass: can't save entry.\n"); | |
64 | return(1); | |
65 | } | |
66 | if (index(p, '.')) | |
67 | (void)fprintf(stderr, | |
68 | "chpass: \'.\' is dangerous in a login name.\n"); | |
69 | for (; *p; ++p) | |
70 | if (isupper(*p)) { | |
71 | (void)fprintf(stderr, | |
72 | "chpass: upper-case letters are dangerous in a login name.\n"); | |
73 | break; | |
74 | } | |
75 | return(0); | |
76 | } | |
77 | ||
78 | /* ARGSUSED */ | |
79 | p_passwd(p, pw, ep) | |
80 | char *p; | |
81 | struct passwd *pw; | |
82 | ENTRY *ep; | |
83 | { | |
84 | if (!*p) | |
85 | pw->pw_passwd = ""; /* "NOLOGIN"; */ | |
86 | else if (!(pw->pw_passwd = strdup(p))) { | |
87 | (void)fprintf(stderr, "chpass: can't save password entry.\n"); | |
88 | return(1); | |
89 | } | |
90 | ||
91 | return(0); | |
92 | } | |
93 | ||
94 | /* ARGSUSED */ | |
95 | p_uid(p, pw, ep) | |
96 | register char *p; | |
97 | struct passwd *pw; | |
98 | ENTRY *ep; | |
99 | { | |
100 | int id; | |
101 | ||
102 | if (!*p) { | |
103 | (void)fprintf(stderr, "chpass: empty uid field.\n"); | |
104 | return(1); | |
105 | } | |
106 | if (!isdigit(*p)) { | |
107 | (void)fprintf(stderr, "chpass: illegal uid.\n"); | |
108 | return(1); | |
109 | } | |
110 | id = atoi(p); | |
111 | if ((u_int)id > USHRT_MAX) { | |
112 | (void)fprintf(stderr, "chpass: %d > max uid value (%d).\n", | |
113 | id, USHRT_MAX); | |
114 | return(1); | |
115 | } | |
116 | pw->pw_uid = id; | |
117 | return(0); | |
118 | } | |
119 | ||
120 | /* ARGSUSED */ | |
121 | p_gid(p, pw, ep) | |
122 | register char *p; | |
123 | struct passwd *pw; | |
124 | ENTRY *ep; | |
125 | { | |
126 | struct group *gr; | |
127 | int id; | |
128 | ||
129 | if (!*p) { | |
130 | (void)fprintf(stderr, "chpass: empty gid field.\n"); | |
131 | return(1); | |
132 | } | |
133 | if (!isdigit(*p)) { | |
134 | if (!(gr = getgrnam(p))) { | |
135 | (void)fprintf(stderr, | |
136 | "chpass: unknown group %s.\n", p); | |
137 | return(1); | |
138 | } | |
139 | pw->pw_gid = gr->gr_gid; | |
140 | return(0); | |
141 | } | |
142 | id = atoi(p); | |
143 | if ((u_int)id > USHRT_MAX) { | |
144 | (void)fprintf(stderr, "chpass: %d > max gid value (%d).\n", | |
145 | id, USHRT_MAX); | |
146 | return(1); | |
147 | } | |
148 | pw->pw_gid = id; | |
149 | return(0); | |
150 | } | |
151 | ||
152 | /* ARGSUSED */ | |
153 | p_class(p, pw, ep) | |
154 | char *p; | |
155 | struct passwd *pw; | |
156 | ENTRY *ep; | |
157 | { | |
158 | if (!*p) | |
159 | pw->pw_class = ""; | |
160 | else if (!(pw->pw_class = strdup(p))) { | |
161 | (void)fprintf(stderr, "chpass: can't save entry.\n"); | |
162 | return(1); | |
163 | } | |
164 | ||
165 | return(0); | |
166 | } | |
167 | ||
168 | /* ARGSUSED */ | |
169 | p_change(p, pw, ep) | |
170 | char *p; | |
171 | struct passwd *pw; | |
172 | ENTRY *ep; | |
173 | { | |
174 | if (!atot(p, &pw->pw_change)) | |
175 | return(0); | |
176 | (void)fprintf(stderr, "chpass: illegal date for change field.\n"); | |
177 | return(1); | |
178 | } | |
179 | ||
180 | /* ARGSUSED */ | |
181 | p_expire(p, pw, ep) | |
182 | char *p; | |
183 | struct passwd *pw; | |
184 | ENTRY *ep; | |
185 | { | |
186 | if (!atot(p, &pw->pw_expire)) | |
187 | return(0); | |
188 | (void)fprintf(stderr, "chpass: illegal date for expire field.\n"); | |
189 | return(1); | |
190 | } | |
191 | ||
192 | /* ARGSUSED */ | |
193 | p_gecos(p, pw, ep) | |
194 | char *p; | |
195 | struct passwd *pw; | |
196 | ENTRY *ep; | |
197 | { | |
198 | if (!*p) | |
199 | ep->save = ""; | |
200 | else if (!(ep->save = strdup(p))) { | |
201 | (void)fprintf(stderr, "chpass: can't save entry.\n"); | |
202 | return(1); | |
203 | } | |
204 | return(0); | |
205 | } | |
206 | ||
207 | /* ARGSUSED */ | |
208 | p_hdir(p, pw, ep) | |
209 | char *p; | |
210 | struct passwd *pw; | |
211 | ENTRY *ep; | |
212 | { | |
213 | if (!*p) { | |
214 | (void)fprintf(stderr, "chpass: empty home directory field.\n"); | |
215 | return(1); | |
216 | } | |
217 | if (!(pw->pw_dir = strdup(p))) { | |
218 | (void)fprintf(stderr, "chpass: can't save entry.\n"); | |
219 | return(1); | |
220 | } | |
221 | return(0); | |
222 | } | |
223 | ||
224 | /* ARGSUSED */ | |
225 | p_shell(p, pw, ep) | |
226 | register char *p; | |
227 | struct passwd *pw; | |
228 | ENTRY *ep; | |
229 | { | |
230 | char *t, *ok_shell(); | |
231 | ||
232 | if (!*p) { | |
233 | pw->pw_shell = _PATH_BSHELL; | |
234 | return(0); | |
235 | } | |
236 | /* only admin can change from or to "restricted" shells */ | |
237 | if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) { | |
238 | (void)fprintf(stderr, | |
239 | "chpass: %s: current shell non-standard.\n", pw->pw_shell); | |
240 | return(1); | |
241 | } | |
242 | if (!(t = ok_shell(p))) { | |
243 | if (uid) { | |
244 | (void)fprintf(stderr, | |
245 | "chpass: %s: non-standard shell.\n", p); | |
246 | return(1); | |
247 | } | |
248 | } | |
249 | else | |
250 | p = t; | |
251 | if (!(pw->pw_shell = strdup(p))) { | |
252 | (void)fprintf(stderr, "chpass: can't save entry.\n"); | |
253 | return(1); | |
254 | } | |
255 | return(0); | |
256 | } |