Annotation of src/usr.bin/chpass/edit.c, Revision 1.26
1.26 ! millert 1: /* $OpenBSD: edit.c,v 1.25 2003/02/07 23:28:18 millert Exp $ */
1.2 deraadt 2: /* $NetBSD: edit.c,v 1.6 1996/05/15 21:50:45 jtc Exp $ */
1.1 deraadt 3:
4: /*-
5: * Copyright (c) 1990, 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[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94";
40: #else
1.26 ! millert 41: static char rcsid[] = "$OpenBSD: edit.c,v 1.25 2003/02/07 23:28:18 millert Exp $";
1.1 deraadt 42: #endif
43: #endif /* not lint */
44:
45: #include <sys/param.h>
46: #include <sys/stat.h>
47:
48: #include <ctype.h>
49: #include <err.h>
50: #include <errno.h>
1.24 millert 51: #include <fcntl.h>
1.1 deraadt 52: #include <paths.h>
53: #include <pwd.h>
54: #include <stdio.h>
55: #include <stdlib.h>
56: #include <string.h>
57: #include <unistd.h>
1.2 deraadt 58: #include <util.h>
1.1 deraadt 59:
60: #include "chpass.h"
61:
1.23 millert 62: int
1.2 deraadt 63: edit(tempname, pw)
64: char *tempname;
1.1 deraadt 65: struct passwd *pw;
66: {
67: struct stat begin, end;
68:
69: for (;;) {
1.6 deraadt 70: if (lstat(tempname, &begin) == -1 || S_ISLNK(begin.st_mode))
1.23 millert 71: return (EDIT_ERROR);
1.2 deraadt 72: pw_edit(1, tempname);
1.7 deraadt 73: if (lstat(tempname, &end) == -1 || S_ISLNK(end.st_mode))
1.23 millert 74: return (EDIT_ERROR);
1.17 ho 75: if (begin.st_mtime == end.st_mtime &&
76: begin.st_size == end.st_size) {
1.1 deraadt 77: warnx("no changes made");
1.23 millert 78: return (EDIT_NOCHANGE);
1.1 deraadt 79: }
1.18 millert 80: if (verify(tempname, pw))
1.1 deraadt 81: break;
82: pw_prompt();
83: }
1.23 millert 84: return(EDIT_OK);
1.1 deraadt 85: }
86:
87: /*
88: * display --
89: * print out the file for the user to edit; strange side-effect:
90: * set conditional flag if the user gets to edit the shell.
91: */
92: void
1.2 deraadt 93: display(tempname, fd, pw)
94: char *tempname;
1.1 deraadt 95: int fd;
96: struct passwd *pw;
97: {
98: FILE *fp;
1.13 deraadt 99: char *bp, *p;
100: char chngstr[256];
1.1 deraadt 101:
102: if (!(fp = fdopen(fd, "w")))
103: pw_error(tempname, 1, 1);
104:
105: (void)fprintf(fp,
1.20 aaron 106: "# Changing user database information for %s.\n", pw->pw_name);
1.1 deraadt 107: if (!uid) {
108: (void)fprintf(fp, "Login: %s\n", pw->pw_name);
1.4 downsj 109: (void)fprintf(fp, "Encrypted password: %s\n", pw->pw_passwd);
1.16 deraadt 110: (void)fprintf(fp, "Uid [#]: %u\n", pw->pw_uid);
111: (void)fprintf(fp, "Gid [# or name]: %u\n", pw->pw_gid);
1.1 deraadt 112: (void)fprintf(fp, "Change [month day year]: %s\n",
1.13 deraadt 113: ttoa(chngstr, sizeof(chngstr), pw->pw_change));
1.1 deraadt 114: (void)fprintf(fp, "Expire [month day year]: %s\n",
1.13 deraadt 115: ttoa(chngstr, sizeof(chngstr), pw->pw_expire));
1.1 deraadt 116: (void)fprintf(fp, "Class: %s\n", pw->pw_class);
117: (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
118: (void)fprintf(fp, "Shell: %s\n",
119: *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
120: }
121: /* Only admin can change "restricted" shells. */
122: else if (ok_shell(pw->pw_shell))
123: /*
124: * Make shell a restricted field. Ugly with a
125: * necklace, but there's not much else to do.
126: */
127: (void)fprintf(fp, "Shell: %s\n",
128: *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
129: else
130: list[E_SHELL].restricted = 1;
131: bp = pw->pw_gecos;
132: p = strsep(&bp, ",");
133: (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
134: p = strsep(&bp, ",");
1.19 aaron 135: (void)fprintf(fp, "Office Location: %s\n", p ? p : "");
1.1 deraadt 136: p = strsep(&bp, ",");
137: (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
138: p = strsep(&bp, ",");
139: (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
140:
141: (void)fchown(fd, getuid(), getgid());
142: (void)fclose(fp);
143: }
144:
145: int
1.2 deraadt 146: verify(tempname, pw)
147: char *tempname;
1.1 deraadt 148: struct passwd *pw;
149: {
1.22 deraadt 150: unsigned int len, alen, line;
151: static char buf[LINE_MAX];
152: struct stat sb;
153: char *p, *q;
1.1 deraadt 154: ENTRY *ep;
155: FILE *fp;
1.24 millert 156: int fd;
1.1 deraadt 157:
1.24 millert 158: if ((fd = open(tempname, O_RDONLY|O_NOFOLLOW)) == -1 ||
159: (fp = fdopen(fd, "r")) == NULL)
1.1 deraadt 160: pw_error(tempname, 1, 1);
1.24 millert 161: if (fstat(fd, &sb))
1.1 deraadt 162: pw_error(tempname, 1, 1);
1.25 millert 163: if (sb.st_size == 0 || sb.st_nlink != 1 || sb.st_uid != uid) {
1.1 deraadt 164: warnx("corrupted temporary file");
165: goto bad;
166: }
1.11 deraadt 167: line = 0;
1.1 deraadt 168: while (fgets(buf, sizeof(buf), fp)) {
1.11 deraadt 169: line++;
1.1 deraadt 170: if (!buf[0] || buf[0] == '#')
171: continue;
1.26 ! millert 172: if ((p = strchr(buf, '\n')) != NULL)
! 173: *p = '\0';
! 174: else if (!feof(fp)) {
1.22 deraadt 175: warnx("line %u too long", line);
1.1 deraadt 176: goto bad;
177: }
178: for (ep = list;; ++ep) {
179: if (!ep->prompt) {
1.22 deraadt 180: warnx("unrecognized field on line %u", line);
1.1 deraadt 181: goto bad;
182: }
183: if (!strncasecmp(buf, ep->prompt, ep->len)) {
184: if (ep->restricted && uid) {
185: warnx(
186: "you may not change the %s field",
187: ep->prompt);
188: goto bad;
189: }
190: if (!(p = strchr(buf, ':'))) {
1.22 deraadt 191: warnx("line %u corrupted", line);
1.1 deraadt 192: goto bad;
193: }
194: while (isspace(*++p));
1.20 aaron 195: for (q = p; *q && isprint(*q); q++) {
196: if (ep->except && strchr(ep->except,*q))
197: break;
198: }
199: if (*q) {
1.1 deraadt 200: warnx(
201: "illegal character in the \"%s\" field",
202: ep->prompt);
203: goto bad;
204: }
205: if ((ep->func)(p, pw, ep)) {
206: bad: (void)fclose(fp);
207: return (0);
208: }
209: break;
210: }
211: }
212: }
213: (void)fclose(fp);
1.14 deraadt 214:
215: if (list[E_NAME].save == NULL)
216: list[E_NAME].save = "";
217: if (list[E_BPHONE].save == NULL)
218: list[E_BPHONE].save = "";
219: if (list[E_HPHONE].save == NULL)
220: list[E_HPHONE].save = "";
221: if (list[E_LOCATE].save == NULL)
222: list[E_LOCATE].save = "";
1.1 deraadt 223:
224: /* Build the gecos field. */
225: len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
226: strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
1.9 deraadt 227: for (alen = 0, p = list[E_NAME].save; *p; p++)
228: if (*p == '&')
229: alen = alen + strlen(pw->pw_name) - 1;
1.1 deraadt 230: if (!(p = malloc(len)))
231: err(1, NULL);
1.22 deraadt 232: (void)snprintf(p, len, "%s,%s,%s,%s", list[E_NAME].save,
1.1 deraadt 233: list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
1.22 deraadt 234: pw->pw_gecos = p;
1.1 deraadt 235:
236: if (snprintf(buf, sizeof(buf),
1.16 deraadt 237: "%s:%s:%u:%u:%s:%ld:%ld:%s:%s:%s",
1.1 deraadt 238: pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
1.21 deraadt 239: (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos, pw->pw_dir,
1.10 deraadt 240: pw->pw_shell) >= 1023 ||
241: strlen(buf) + alen >= 1023) {
1.1 deraadt 242: warnx("entries too long");
1.9 deraadt 243: free(p);
1.1 deraadt 244: return (0);
245: }
1.9 deraadt 246: free(p);
247:
1.12 kstailey 248: return (pw_scan(buf, pw, NULL));
1.1 deraadt 249: }
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