Annotation of src/usr.bin/chpass/edit.c, Revision 1.27
1.27 ! millert 1: /* $OpenBSD: edit.c,v 1.26 2003/04/03 17:16:32 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.
1.27 ! millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
34: #if 0
35: static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94";
36: #else
1.27 ! millert 37: static char rcsid[] = "$OpenBSD: edit.c,v 1.26 2003/04/03 17:16:32 millert Exp $";
1.1 deraadt 38: #endif
39: #endif /* not lint */
40:
41: #include <sys/param.h>
42: #include <sys/stat.h>
43:
44: #include <ctype.h>
45: #include <err.h>
46: #include <errno.h>
1.24 millert 47: #include <fcntl.h>
1.1 deraadt 48: #include <paths.h>
49: #include <pwd.h>
50: #include <stdio.h>
51: #include <stdlib.h>
52: #include <string.h>
53: #include <unistd.h>
1.2 deraadt 54: #include <util.h>
1.1 deraadt 55:
56: #include "chpass.h"
57:
1.23 millert 58: int
1.2 deraadt 59: edit(tempname, pw)
60: char *tempname;
1.1 deraadt 61: struct passwd *pw;
62: {
63: struct stat begin, end;
64:
65: for (;;) {
1.6 deraadt 66: if (lstat(tempname, &begin) == -1 || S_ISLNK(begin.st_mode))
1.23 millert 67: return (EDIT_ERROR);
1.2 deraadt 68: pw_edit(1, tempname);
1.7 deraadt 69: if (lstat(tempname, &end) == -1 || S_ISLNK(end.st_mode))
1.23 millert 70: return (EDIT_ERROR);
1.17 ho 71: if (begin.st_mtime == end.st_mtime &&
72: begin.st_size == end.st_size) {
1.1 deraadt 73: warnx("no changes made");
1.23 millert 74: return (EDIT_NOCHANGE);
1.1 deraadt 75: }
1.18 millert 76: if (verify(tempname, pw))
1.1 deraadt 77: break;
78: pw_prompt();
79: }
1.23 millert 80: return(EDIT_OK);
1.1 deraadt 81: }
82:
83: /*
84: * display --
85: * print out the file for the user to edit; strange side-effect:
86: * set conditional flag if the user gets to edit the shell.
87: */
88: void
1.2 deraadt 89: display(tempname, fd, pw)
90: char *tempname;
1.1 deraadt 91: int fd;
92: struct passwd *pw;
93: {
94: FILE *fp;
1.13 deraadt 95: char *bp, *p;
96: char chngstr[256];
1.1 deraadt 97:
98: if (!(fp = fdopen(fd, "w")))
99: pw_error(tempname, 1, 1);
100:
101: (void)fprintf(fp,
1.20 aaron 102: "# Changing user database information for %s.\n", pw->pw_name);
1.1 deraadt 103: if (!uid) {
104: (void)fprintf(fp, "Login: %s\n", pw->pw_name);
1.4 downsj 105: (void)fprintf(fp, "Encrypted password: %s\n", pw->pw_passwd);
1.16 deraadt 106: (void)fprintf(fp, "Uid [#]: %u\n", pw->pw_uid);
107: (void)fprintf(fp, "Gid [# or name]: %u\n", pw->pw_gid);
1.1 deraadt 108: (void)fprintf(fp, "Change [month day year]: %s\n",
1.13 deraadt 109: ttoa(chngstr, sizeof(chngstr), pw->pw_change));
1.1 deraadt 110: (void)fprintf(fp, "Expire [month day year]: %s\n",
1.13 deraadt 111: ttoa(chngstr, sizeof(chngstr), pw->pw_expire));
1.1 deraadt 112: (void)fprintf(fp, "Class: %s\n", pw->pw_class);
113: (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
114: (void)fprintf(fp, "Shell: %s\n",
115: *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
116: }
117: /* Only admin can change "restricted" shells. */
118: else if (ok_shell(pw->pw_shell))
119: /*
120: * Make shell a restricted field. Ugly with a
121: * necklace, but there's not much else to do.
122: */
123: (void)fprintf(fp, "Shell: %s\n",
124: *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
125: else
126: list[E_SHELL].restricted = 1;
127: bp = pw->pw_gecos;
128: p = strsep(&bp, ",");
129: (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
130: p = strsep(&bp, ",");
1.19 aaron 131: (void)fprintf(fp, "Office Location: %s\n", p ? p : "");
1.1 deraadt 132: p = strsep(&bp, ",");
133: (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
134: p = strsep(&bp, ",");
135: (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
136:
137: (void)fchown(fd, getuid(), getgid());
138: (void)fclose(fp);
139: }
140:
141: int
1.2 deraadt 142: verify(tempname, pw)
143: char *tempname;
1.1 deraadt 144: struct passwd *pw;
145: {
1.22 deraadt 146: unsigned int len, alen, line;
147: static char buf[LINE_MAX];
148: struct stat sb;
149: char *p, *q;
1.1 deraadt 150: ENTRY *ep;
151: FILE *fp;
1.24 millert 152: int fd;
1.1 deraadt 153:
1.24 millert 154: if ((fd = open(tempname, O_RDONLY|O_NOFOLLOW)) == -1 ||
155: (fp = fdopen(fd, "r")) == NULL)
1.1 deraadt 156: pw_error(tempname, 1, 1);
1.24 millert 157: if (fstat(fd, &sb))
1.1 deraadt 158: pw_error(tempname, 1, 1);
1.25 millert 159: if (sb.st_size == 0 || sb.st_nlink != 1 || sb.st_uid != uid) {
1.1 deraadt 160: warnx("corrupted temporary file");
161: goto bad;
162: }
1.11 deraadt 163: line = 0;
1.1 deraadt 164: while (fgets(buf, sizeof(buf), fp)) {
1.11 deraadt 165: line++;
1.1 deraadt 166: if (!buf[0] || buf[0] == '#')
167: continue;
1.26 millert 168: if ((p = strchr(buf, '\n')) != NULL)
169: *p = '\0';
170: else if (!feof(fp)) {
1.22 deraadt 171: warnx("line %u too long", line);
1.1 deraadt 172: goto bad;
173: }
174: for (ep = list;; ++ep) {
175: if (!ep->prompt) {
1.22 deraadt 176: warnx("unrecognized field on line %u", line);
1.1 deraadt 177: goto bad;
178: }
179: if (!strncasecmp(buf, ep->prompt, ep->len)) {
180: if (ep->restricted && uid) {
181: warnx(
182: "you may not change the %s field",
183: ep->prompt);
184: goto bad;
185: }
186: if (!(p = strchr(buf, ':'))) {
1.22 deraadt 187: warnx("line %u corrupted", line);
1.1 deraadt 188: goto bad;
189: }
190: while (isspace(*++p));
1.20 aaron 191: for (q = p; *q && isprint(*q); q++) {
192: if (ep->except && strchr(ep->except,*q))
193: break;
194: }
195: if (*q) {
1.1 deraadt 196: warnx(
197: "illegal character in the \"%s\" field",
198: ep->prompt);
199: goto bad;
200: }
201: if ((ep->func)(p, pw, ep)) {
202: bad: (void)fclose(fp);
203: return (0);
204: }
205: break;
206: }
207: }
208: }
209: (void)fclose(fp);
1.14 deraadt 210:
211: if (list[E_NAME].save == NULL)
212: list[E_NAME].save = "";
213: if (list[E_BPHONE].save == NULL)
214: list[E_BPHONE].save = "";
215: if (list[E_HPHONE].save == NULL)
216: list[E_HPHONE].save = "";
217: if (list[E_LOCATE].save == NULL)
218: list[E_LOCATE].save = "";
1.1 deraadt 219:
220: /* Build the gecos field. */
221: len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
222: strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
1.9 deraadt 223: for (alen = 0, p = list[E_NAME].save; *p; p++)
224: if (*p == '&')
225: alen = alen + strlen(pw->pw_name) - 1;
1.1 deraadt 226: if (!(p = malloc(len)))
227: err(1, NULL);
1.22 deraadt 228: (void)snprintf(p, len, "%s,%s,%s,%s", list[E_NAME].save,
1.1 deraadt 229: list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
1.22 deraadt 230: pw->pw_gecos = p;
1.1 deraadt 231:
232: if (snprintf(buf, sizeof(buf),
1.16 deraadt 233: "%s:%s:%u:%u:%s:%ld:%ld:%s:%s:%s",
1.1 deraadt 234: pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
1.21 deraadt 235: (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos, pw->pw_dir,
1.10 deraadt 236: pw->pw_shell) >= 1023 ||
237: strlen(buf) + alen >= 1023) {
1.1 deraadt 238: warnx("entries too long");
1.9 deraadt 239: free(p);
1.1 deraadt 240: return (0);
241: }
1.9 deraadt 242: free(p);
243:
1.12 kstailey 244: return (pw_scan(buf, pw, NULL));
1.1 deraadt 245: }
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