1 /*- 2 * Copyright (c) 1990, 1993, 1994 3 * The Regents of the University of California. 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 #if 0 35 #ifndef lint 36 static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94"; 37 #endif /* not lint */ 38 #endif 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include <sys/param.h> 44 #include <sys/stat.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <md5.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 #ifdef YP 62 #include "pw_yp.h" 63 #endif /* YP */ 64 65 extern char *tempname; 66 67 void 68 edit(struct passwd *pw) 69 { 70 struct stat begin, end; 71 char *begin_sum, *end_sum; 72 73 for (;;) { 74 if (stat(tempname, &begin)) 75 pw_error(tempname, 1, 1); 76 begin_sum = MD5File(tempname, (char *)NULL); 77 pw_edit(1); 78 if (stat(tempname, &end)) 79 pw_error(tempname, 1, 1); 80 end_sum = MD5File(tempname, (char *)NULL); 81 if ((begin.st_mtime == end.st_mtime) && 82 (strcmp(begin_sum, end_sum) == 0)) { 83 warnx("no changes made"); 84 pw_error(NULL, 0, 0); 85 } 86 free(begin_sum); 87 free(end_sum); 88 if (verify(pw)) 89 break; 90 pw_prompt(); 91 } 92 } 93 94 /* 95 * display -- 96 * print out the file for the user to edit; strange side-effect: 97 * set conditional flag if the user gets to edit the shell. 98 */ 99 void 100 display(int fd, struct passwd *pw) 101 { 102 FILE *fp; 103 char *bp, *p; 104 105 if (!(fp = fdopen(fd, "w"))) 106 pw_error(tempname, 1, 1); 107 108 (void)fprintf(fp, 109 #ifdef YP 110 "#Changing %s information for %s.\n", _use_yp ? "NIS" : "user database", pw->pw_name); 111 if (!uid && (!_use_yp || suser_override)) { 112 #else 113 "#Changing user database information for %s.\n", pw->pw_name); 114 if (!uid) { 115 #endif /* YP */ 116 (void)fprintf(fp, "Login: %s\n", pw->pw_name); 117 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); 118 (void)fprintf(fp, "Uid [#]: %lu\n", (unsigned long)pw->pw_uid); 119 (void)fprintf(fp, "Gid [# or name]: %lu\n", 120 (unsigned long)pw->pw_gid); 121 (void)fprintf(fp, "Change [month day year]: %s\n", 122 ttoa(pw->pw_change)); 123 (void)fprintf(fp, "Expire [month day year]: %s\n", 124 ttoa(pw->pw_expire)); 125 (void)fprintf(fp, "Class: %s\n", pw->pw_class); 126 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir); 127 (void)fprintf(fp, "Shell: %s\n", 128 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 129 } 130 /* Only admin can change "restricted" shells. */ 131 #if 0 132 else if (ok_shell(pw->pw_shell)) 133 /* 134 * Make shell a restricted field. Ugly with a 135 * necklace, but there's not much else to do. 136 */ 137 #else 138 else if ((!list[E_SHELL].restricted && ok_shell(pw->pw_shell)) || !uid) 139 /* 140 * If change not restrict (table.c) and standard shell 141 * OR if root, then allow editing of shell. 142 */ 143 #endif 144 (void)fprintf(fp, "Shell: %s\n", 145 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 146 else 147 list[E_SHELL].restricted = 1; 148 bp = pw->pw_gecos; 149 150 p = strsep(&bp, ","); 151 p = strdup(p ? p : ""); 152 list[E_NAME].save = p; 153 if (!list[E_NAME].restricted || !uid) 154 (void)fprintf(fp, "Full Name: %s\n", p); 155 156 p = strsep(&bp, ","); 157 p = strdup(p ? p : ""); 158 list[E_LOCATE].save = p; 159 if (!list[E_LOCATE].restricted || !uid) 160 (void)fprintf(fp, "Office Location: %s\n", p); 161 162 p = strsep(&bp, ","); 163 p = strdup(p ? p : ""); 164 list[E_BPHONE].save = p; 165 if (!list[E_BPHONE].restricted || !uid) 166 (void)fprintf(fp, "Office Phone: %s\n", p); 167 168 p = strsep(&bp, ","); 169 p = strdup(p ? p : ""); 170 list[E_HPHONE].save = p; 171 if (!list[E_HPHONE].restricted || !uid) 172 (void)fprintf(fp, "Home Phone: %s\n", p); 173 174 bp = strdup(bp ? bp : ""); 175 list[E_OTHER].save = bp; 176 if (!list[E_OTHER].restricted || !uid) 177 (void)fprintf(fp, "Other information: %s\n", bp); 178 179 (void)fchown(fd, getuid(), getgid()); 180 (void)fclose(fp); 181 } 182 183 int 184 verify(struct passwd *pw) 185 { 186 ENTRY *ep; 187 char *p; 188 struct stat sb; 189 FILE *fp; 190 int len, line; 191 static char buf[LINE_MAX]; 192 193 if (!(fp = fopen(tempname, "r"))) 194 pw_error(tempname, 1, 1); 195 if (fstat(fileno(fp), &sb)) 196 pw_error(tempname, 1, 1); 197 if (sb.st_size == 0) { 198 warnx("corrupted temporary file"); 199 goto bad; 200 } 201 line = 0; 202 while (fgets(buf, sizeof(buf), fp)) { 203 line++; 204 if (!buf[0] || buf[0] == '#') 205 continue; 206 if (!(p = strchr(buf, '\n'))) { 207 warnx("line %d too long", line); 208 goto bad; 209 } 210 *p = '\0'; 211 for (ep = list;; ++ep) { 212 if (!ep->prompt) { 213 warnx("unrecognized field on line %d", line); 214 goto bad; 215 } 216 if (!strncasecmp(buf, ep->prompt, ep->len)) { 217 if (ep->restricted && uid) { 218 warnx( 219 "you may not change the %s field", 220 ep->prompt); 221 goto bad; 222 } 223 if (!(p = strchr(buf, ':'))) { 224 warnx("line %d corrupted", line); 225 goto bad; 226 } 227 while (isspace(*++p)); 228 if (ep->except && strpbrk(p, ep->except)) { 229 warnx( 230 "illegal character in the \"%s\" field", 231 ep->prompt); 232 goto bad; 233 } 234 if ((ep->func)(p, pw, ep)) { 235 bad: (void)fclose(fp); 236 return (0); 237 } 238 break; 239 } 240 } 241 } 242 (void)fclose(fp); 243 244 /* Build the gecos field. */ 245 len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) + 246 strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 247 strlen(list[E_OTHER].save) + 5; 248 if (!(p = malloc(len))) 249 err(1, NULL); 250 (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s,%s", list[E_NAME].save, 251 list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save, 252 list[E_OTHER].save); 253 254 while ((len = strlen(pw->pw_gecos)) && pw->pw_gecos[len - 1] == ',') 255 pw->pw_gecos[len - 1] = '\0'; 256 257 if ((size_t)snprintf(buf, sizeof(buf), 258 "%s:%s:%lu:%lu:%s:%ld:%ld:%s:%s:%s", 259 pw->pw_name, pw->pw_passwd, (unsigned long)pw->pw_uid, 260 (unsigned long)pw->pw_gid, pw->pw_class, (long)pw->pw_change, 261 (long)pw->pw_expire, pw->pw_gecos, pw->pw_dir, 262 pw->pw_shell) >= sizeof(buf)) { 263 warnx("entries too long"); 264 free(p); 265 return (0); 266 } 267 free(p); 268 return (__pw_scan(buf, pw, _PWSCAN_WARN|_PWSCAN_MASTER)); 269 } 270