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c61fa9d9 WJ |
1 | /*- |
2 | * Copyright (c) 1990 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[] = "@(#)edit.c 5.2 (Berkeley) 3/3/91"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include <sys/param.h> | |
39 | #include <sys/stat.h> | |
40 | #include <pwd.h> | |
41 | #include <errno.h> | |
42 | #include <stdio.h> | |
43 | #include <paths.h> | |
44 | #include <stdlib.h> | |
45 | #include <string.h> | |
46 | #include "chpass.h" | |
47 | ||
48 | extern char *tempname; | |
49 | ||
50 | void | |
51 | edit(pw) | |
52 | struct passwd *pw; | |
53 | { | |
54 | struct stat begin, end; | |
55 | ||
56 | for (;;) { | |
57 | if (stat(tempname, &begin)) | |
58 | pw_error(tempname, 1, 1); | |
59 | pw_edit(1); | |
60 | if (stat(tempname, &end)) | |
61 | pw_error(tempname, 1, 1); | |
62 | if (begin.st_mtime == end.st_mtime) { | |
63 | (void)fprintf(stderr, "chpass: no changes made\n"); | |
64 | pw_error((char *)NULL, 0, 0); | |
65 | } | |
66 | if (verify(pw)) | |
67 | break; | |
68 | pw_prompt(); | |
69 | } | |
70 | } | |
71 | ||
72 | /* | |
73 | * display -- | |
74 | * print out the file for the user to edit; strange side-effect: | |
75 | * set conditional flag if the user gets to edit the shell. | |
76 | */ | |
77 | display(fd, pw) | |
78 | int fd; | |
79 | struct passwd *pw; | |
80 | { | |
81 | register char *p; | |
82 | FILE *fp; | |
83 | char *bp, *ok_shell(), *ttoa(); | |
84 | ||
85 | if (!(fp = fdopen(fd, "w"))) | |
86 | pw_error(tempname, 1, 1); | |
87 | ||
88 | (void)fprintf(fp, | |
89 | "#Changing user database information for %s.\n", pw->pw_name); | |
90 | if (!uid) { | |
91 | (void)fprintf(fp, "Login: %s\n", pw->pw_name); | |
92 | (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); | |
93 | (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid); | |
94 | (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid); | |
95 | (void)fprintf(fp, "Change [month day year]: %s\n", | |
96 | ttoa(pw->pw_change)); | |
97 | (void)fprintf(fp, "Expire [month day year]: %s\n", | |
98 | ttoa(pw->pw_expire)); | |
99 | (void)fprintf(fp, "Class: %s\n", pw->pw_class); | |
100 | (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir); | |
101 | (void)fprintf(fp, "Shell: %s\n", | |
102 | *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); | |
103 | } | |
104 | /* Only admin can change "restricted" shells. */ | |
105 | else if (ok_shell(pw->pw_shell)) | |
106 | /* | |
107 | * Make shell a restricted field. Ugly with a | |
108 | * necklace, but there's not much else to do. | |
109 | */ | |
110 | (void)fprintf(fp, "Shell: %s\n", | |
111 | *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); | |
112 | else | |
113 | list[E_SHELL].restricted = 1; | |
114 | bp = pw->pw_gecos; | |
115 | p = strsep(&bp, ","); | |
116 | (void)fprintf(fp, "Full Name: %s\n", p ? p : ""); | |
117 | p = strsep(&bp, ","); | |
118 | (void)fprintf(fp, "Location: %s\n", p ? p : ""); | |
119 | p = strsep(&bp, ","); | |
120 | (void)fprintf(fp, "Office Phone: %s\n", p ? p : ""); | |
121 | p = strsep(&bp, ","); | |
122 | (void)fprintf(fp, "Home Phone: %s\n", p ? p : ""); | |
123 | ||
124 | (void)fchown(fd, getuid(), getgid()); | |
125 | (void)fclose(fp); | |
126 | } | |
127 | ||
128 | verify(pw) | |
129 | struct passwd *pw; | |
130 | { | |
131 | register ENTRY *ep; | |
132 | register char *p; | |
133 | FILE *fp; | |
134 | int len; | |
135 | char buf[LINE_MAX]; | |
136 | ||
137 | if (!(fp = fopen(tempname, "r"))) | |
138 | pw_error(tempname, 1, 1); | |
139 | while (fgets(buf, sizeof(buf), fp)) { | |
140 | if (!buf[0] || buf[0] == '#') | |
141 | continue; | |
142 | if (!(p = index(buf, '\n'))) { | |
143 | (void)fprintf(stderr, "chpass: line too long.\n"); | |
144 | goto bad; | |
145 | } | |
146 | *p = '\0'; | |
147 | for (ep = list;; ++ep) { | |
148 | if (!ep->prompt) { | |
149 | (void)fprintf(stderr, | |
150 | "chpass: unrecognized field.\n"); | |
151 | goto bad; | |
152 | } | |
153 | if (!strncasecmp(buf, ep->prompt, ep->len)) { | |
154 | if (ep->restricted && uid) { | |
155 | (void)fprintf(stderr, | |
156 | "chpass: you may not change the %s field.\n", | |
157 | ep->prompt); | |
158 | goto bad; | |
159 | } | |
160 | if (!(p = index(buf, ':'))) { | |
161 | (void)fprintf(stderr, | |
162 | "chpass: line corrupted.\n"); | |
163 | goto bad; | |
164 | } | |
165 | while (isspace(*++p)); | |
166 | if (ep->except && strpbrk(p, ep->except)) { | |
167 | (void)fprintf(stderr, | |
168 | "chpass: illegal character in the \"%s\" field.\n", | |
169 | ep->prompt); | |
170 | goto bad; | |
171 | } | |
172 | if ((ep->func)(p, pw, ep)) { | |
173 | bad: (void)fclose(fp); | |
174 | return(0); | |
175 | } | |
176 | break; | |
177 | } | |
178 | } | |
179 | } | |
180 | (void)fclose(fp); | |
181 | ||
182 | /* Build the gecos field. */ | |
183 | len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) + | |
184 | strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4; | |
185 | if (!(p = malloc(len))) { | |
186 | (void)fprintf(stderr, "chpass: %s\n", strerror(errno)); | |
187 | exit(1); | |
188 | } | |
189 | (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save, | |
190 | list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save); | |
191 | ||
192 | if (snprintf(buf, sizeof(buf), | |
193 | "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s", | |
194 | pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, | |
195 | pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir, | |
196 | pw->pw_shell) >= sizeof(buf)) { | |
197 | (void)fprintf(stderr, "chpass: entries too long\n"); | |
198 | return(0); | |
199 | } | |
200 | return(pw_scan(buf, pw)); | |
201 | } |