Annotation of src/usr.bin/chpass/edit.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: edit.c,v 1.5 1995/07/28 07:03:41 phil Exp $ */
2:
3: /*-
4: * Copyright (c) 1990, 1993, 1994
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94";
39: #else
40: static char rcsid[] = "$NetBSD: edit.c,v 1.5 1995/07/28 07:03:41 phil Exp $";
41: #endif
42: #endif /* not lint */
43:
44: #include <sys/param.h>
45: #include <sys/stat.h>
46:
47: #include <ctype.h>
48: #include <err.h>
49: #include <errno.h>
50: #include <paths.h>
51: #include <pwd.h>
52: #include <stdio.h>
53: #include <stdlib.h>
54: #include <string.h>
55: #include <unistd.h>
56:
57: #include <pw_scan.h>
58: #include <pw_util.h>
59:
60: #include "chpass.h"
61:
62: extern char *tempname;
63:
64: void
65: edit(pw)
66: struct passwd *pw;
67: {
68: struct stat begin, end;
69:
70: for (;;) {
71: if (stat(tempname, &begin))
72: pw_error(tempname, 1, 1);
73: pw_edit(1);
74: if (stat(tempname, &end))
75: pw_error(tempname, 1, 1);
76: if (begin.st_mtime == end.st_mtime) {
77: warnx("no changes made");
78: pw_error(NULL, 0, 0);
79: }
80: if (verify(pw))
81: break;
82: pw_prompt();
83: }
84: }
85:
86: /*
87: * display --
88: * print out the file for the user to edit; strange side-effect:
89: * set conditional flag if the user gets to edit the shell.
90: */
91: void
92: display(fd, pw)
93: int fd;
94: struct passwd *pw;
95: {
96: FILE *fp;
97: char *bp, *p, *ttoa();
98:
99: if (!(fp = fdopen(fd, "w")))
100: pw_error(tempname, 1, 1);
101:
102: (void)fprintf(fp,
103: "#Changing user database information for %s.\n", pw->pw_name);
104: if (!uid) {
105: (void)fprintf(fp, "Login: %s\n", pw->pw_name);
106: (void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
107: (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid);
108: (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid);
109: (void)fprintf(fp, "Change [month day year]: %s\n",
110: ttoa(pw->pw_change));
111: (void)fprintf(fp, "Expire [month day year]: %s\n",
112: ttoa(pw->pw_expire));
113: (void)fprintf(fp, "Class: %s\n", pw->pw_class);
114: (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
115: (void)fprintf(fp, "Shell: %s\n",
116: *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
117: }
118: /* Only admin can change "restricted" shells. */
119: else if (ok_shell(pw->pw_shell))
120: /*
121: * Make shell a restricted field. Ugly with a
122: * necklace, but there's not much else to do.
123: */
124: (void)fprintf(fp, "Shell: %s\n",
125: *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
126: else
127: list[E_SHELL].restricted = 1;
128: bp = pw->pw_gecos;
129: p = strsep(&bp, ",");
130: (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
131: p = strsep(&bp, ",");
132: (void)fprintf(fp, "Location: %s\n", p ? p : "");
133: p = strsep(&bp, ",");
134: (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
135: p = strsep(&bp, ",");
136: (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
137:
138: (void)fchown(fd, getuid(), getgid());
139: (void)fclose(fp);
140: }
141:
142: int
143: verify(pw)
144: struct passwd *pw;
145: {
146: ENTRY *ep;
147: char *p;
148: struct stat sb;
149: FILE *fp;
150: int len;
151: static char buf[LINE_MAX];
152:
153: if (!(fp = fopen(tempname, "r")))
154: pw_error(tempname, 1, 1);
155: if (fstat(fileno(fp), &sb))
156: pw_error(tempname, 1, 1);
157: if (sb.st_size == 0) {
158: warnx("corrupted temporary file");
159: goto bad;
160: }
161: while (fgets(buf, sizeof(buf), fp)) {
162: if (!buf[0] || buf[0] == '#')
163: continue;
164: if (!(p = strchr(buf, '\n'))) {
165: warnx("line too long");
166: goto bad;
167: }
168: *p = '\0';
169: for (ep = list;; ++ep) {
170: if (!ep->prompt) {
171: warnx("unrecognized field");
172: goto bad;
173: }
174: if (!strncasecmp(buf, ep->prompt, ep->len)) {
175: if (ep->restricted && uid) {
176: warnx(
177: "you may not change the %s field",
178: ep->prompt);
179: goto bad;
180: }
181: if (!(p = strchr(buf, ':'))) {
182: warnx("line corrupted");
183: goto bad;
184: }
185: while (isspace(*++p));
186: if (ep->except && strpbrk(p, ep->except)) {
187: warnx(
188: "illegal character in the \"%s\" field",
189: ep->prompt);
190: goto bad;
191: }
192: if ((ep->func)(p, pw, ep)) {
193: bad: (void)fclose(fp);
194: return (0);
195: }
196: break;
197: }
198: }
199: }
200: (void)fclose(fp);
201:
202: /* Build the gecos field. */
203: len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
204: strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
205: if (!(p = malloc(len)))
206: err(1, NULL);
207: (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save,
208: list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
209:
210: if (snprintf(buf, sizeof(buf),
211: "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
212: pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
213: pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir,
214: pw->pw_shell) >= sizeof(buf)) {
215: warnx("entries too long");
216: return (0);
217: }
218: return (pw_scan(buf, pw, (int *)NULL));
219: }
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