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 * $Id: edit.c,v 1.13 1999/02/23 02:41:26 ghelmer Exp $ 34 */ 35 36 #ifndef lint 37 static const char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94"; 38 #endif /* not lint */ 39 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <paths.h> 47 #include <pwd.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #include <pw_scan.h> 54 #include <pw_util.h> 55 56 #include "chpass.h" 57 #ifdef YP 58 #include "pw_yp.h" 59 #endif /* YP */ 60 61 extern char *tempname; 62 63 void 64 edit(pw) 65 struct passwd *pw; 66 { 67 struct stat begin, end; 68 69 for (;;) { 70 if (stat(tempname, &begin)) 71 pw_error(tempname, 1, 1); 72 pw_edit(1); 73 if (stat(tempname, &end)) 74 pw_error(tempname, 1, 1); 75 if (begin.st_mtime == end.st_mtime) { 76 warnx("no changes made"); 77 pw_error(NULL, 0, 0); 78 } 79 if (verify(pw)) 80 break; 81 pw_prompt(); 82 } 83 } 84 85 /* 86 * display -- 87 * print out the file for the user to edit; strange side-effect: 88 * set conditional flag if the user gets to edit the shell. 89 */ 90 void 91 display(fd, pw) 92 int fd; 93 struct passwd *pw; 94 { 95 FILE *fp; 96 char *bp, *p, *ttoa(); 97 98 if (!(fp = fdopen(fd, "w"))) 99 pw_error(tempname, 1, 1); 100 101 (void)fprintf(fp, 102 #ifdef YP 103 "#Changing %s information for %s.\n", _use_yp ? "NIS" : "user database", pw->pw_name); 104 if (!uid && (!_use_yp || suser_override)) { 105 #else 106 "#Changing user database information for %s.\n", pw->pw_name); 107 if (!uid) { 108 #endif /* YP */ 109 (void)fprintf(fp, "Login: %s\n", pw->pw_name); 110 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); 111 (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid); 112 (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid); 113 (void)fprintf(fp, "Change [month day year]: %s\n", 114 ttoa(pw->pw_change)); 115 (void)fprintf(fp, "Expire [month day year]: %s\n", 116 ttoa(pw->pw_expire)); 117 (void)fprintf(fp, "Class: %s\n", pw->pw_class); 118 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir); 119 (void)fprintf(fp, "Shell: %s\n", 120 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 121 } 122 /* Only admin can change "restricted" shells. */ 123 #if 0 124 else if (ok_shell(pw->pw_shell)) 125 /* 126 * Make shell a restricted field. Ugly with a 127 * necklace, but there's not much else to do. 128 */ 129 #else 130 else if ((!list[E_SHELL].restricted && ok_shell(pw->pw_shell)) || !uid) 131 /* 132 * If change not restrict (table.c) and standard shell 133 * OR if root, then allow editing of shell. 134 */ 135 #endif 136 (void)fprintf(fp, "Shell: %s\n", 137 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 138 else 139 list[E_SHELL].restricted = 1; 140 bp = pw->pw_gecos; 141 142 p = strsep(&bp, ","); 143 if (p) 144 list[E_NAME].save = strdup(p); 145 if (!list[E_NAME].restricted || !uid) 146 (void)fprintf(fp, "Full Name: %s\n", p ? p : ""); 147 148 p = strsep(&bp, ","); 149 if (p) 150 list[E_LOCATE].save = strdup(p); 151 if (!list[E_LOCATE].restricted || !uid) 152 (void)fprintf(fp, "Office Location: %s\n", p ? p : ""); 153 154 p = strsep(&bp, ","); 155 if (p) 156 list[E_BPHONE].save = strdup(p); 157 if (!list[E_BPHONE].restricted || !uid) 158 (void)fprintf(fp, "Office Phone: %s\n", p ? p : ""); 159 160 p = strsep(&bp, ","); 161 if (p) 162 list[E_HPHONE].save = strdup(p); 163 if (!list[E_HPHONE].restricted || !uid) 164 (void)fprintf(fp, "Home Phone: %s\n", p ? p : ""); 165 166 if (bp!=NULL) 167 list[E_OTHER].save = strdup(bp); 168 if (!list[E_OTHER].restricted || !uid) 169 (void)fprintf(fp, "Other information: %s\n", bp ? bp : ""); 170 171 (void)fchown(fd, getuid(), getgid()); 172 (void)fclose(fp); 173 } 174 175 int 176 verify(pw) 177 struct passwd *pw; 178 { 179 ENTRY *ep; 180 char *p; 181 struct stat sb; 182 FILE *fp; 183 int len, line; 184 static char buf[LINE_MAX]; 185 186 if (!(fp = fopen(tempname, "r"))) 187 pw_error(tempname, 1, 1); 188 if (fstat(fileno(fp), &sb)) 189 pw_error(tempname, 1, 1); 190 if (sb.st_size == 0) { 191 warnx("corrupted temporary file"); 192 goto bad; 193 } 194 line = 0; 195 while (fgets(buf, sizeof(buf), fp)) { 196 line++; 197 if (!buf[0] || buf[0] == '#') 198 continue; 199 if (!(p = strchr(buf, '\n'))) { 200 warnx("line %d too long", line); 201 goto bad; 202 } 203 *p = '\0'; 204 for (ep = list;; ++ep) { 205 if (!ep->prompt) { 206 warnx("unrecognized field on line %d", line); 207 goto bad; 208 } 209 if (!strncasecmp(buf, ep->prompt, ep->len)) { 210 if (ep->restricted && uid) { 211 warnx( 212 "you may not change the %s field", 213 ep->prompt); 214 goto bad; 215 } 216 if (!(p = strchr(buf, ':'))) { 217 warnx("line %d corrupted", line); 218 goto bad; 219 } 220 while (isspace(*++p)); 221 if (ep->except && strpbrk(p, ep->except)) { 222 warnx( 223 "illegal character in the \"%s\" field", 224 ep->prompt); 225 goto bad; 226 } 227 if ((ep->func)(p, pw, ep)) { 228 bad: (void)fclose(fp); 229 return (0); 230 } 231 break; 232 } 233 } 234 } 235 (void)fclose(fp); 236 237 /* Build the gecos field. */ 238 len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) + 239 strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 240 strlen(list[E_OTHER].save) + 4; 241 if (!(p = malloc(len))) 242 err(1, NULL); 243 (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s,%s", list[E_NAME].save, 244 list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save, 245 list[E_OTHER].save); 246 247 while ((len = strlen(pw->pw_gecos)) && pw->pw_gecos[len - 1] == ',') 248 pw->pw_gecos[len - 1] = '\0'; 249 250 if (snprintf(buf, sizeof(buf), 251 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s", 252 pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, 253 pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir, 254 pw->pw_shell) >= sizeof(buf)) { 255 warnx("entries too long"); 256 free(p); 257 return (0); 258 } 259 free(p); 260 return (pw_scan(buf, pw)); 261 } 262