chpass.tproj/edit.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*-
  26  * Copyright (c) 1990, 1993, 1994
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #include <sys/param.h>
  59 #include <sys/stat.h>
  60
  61 #include <ctype.h>
  62 #include <err.h>
  63 #include <errno.h>
  64 #include <paths.h>
  65 #include <pwd.h>
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <unistd.h>
  70
  71 #include <pw_scan.h>
  72 #include <pw_util.h>
  73
  74 #include "chpass.h"
  75 #ifdef DIRECTORY_SERVICE
  76 #include "directory_service.h"
  77
  78 extern int dswhere;
  79 #endif /* DIRECTORY_SERVICE */
  80
  81 extern char *tempname;
  82
  83 void
  84 edit(pw)
  85         struct passwd *pw;
  86 {
  87         struct stat begin, end;
  88
  89         for (;;) {
  90                 if (stat(tempname, &begin))
  91                         pw_error(tempname, 1, 1);
  92                 pw_edit(1);
  93                 if (stat(tempname, &end))
  94                         pw_error(tempname, 1, 1);
  95                 if (begin.st_mtime == end.st_mtime) {
  96                         warnx("no changes made");
  97                         pw_error(NULL, 0, 0);
  98                 }
  99                 if (verify(pw))
 100                         break;
 101                 pw_prompt();
 102         }
 103 }
 104
 105 /*
 106  * display --
 107  *      print out the file for the user to edit; strange side-effect:
 108  *      set conditional flag if the user gets to edit the shell.
 109  */
 110 void
 111 display(fd, pw)
 112         int fd;
 113         struct passwd *pw;
 114 {
 115         FILE *fp;
 116         char *bp, *p, *ttoa();
 117 #ifdef DIRECTORY_SERVICE
 118         ENTRY *ep;
 119         struct display d;
 120         int ndisplayed = 0;
 121 #endif /* DIRECTORY_SERVICE */
 122
 123         if (!(fp = fdopen(fd, "w")))
 124                 pw_error(tempname, 1, 1);
 125
 126         (void)fprintf(fp,
 127             "# Changing user database information for %s.\n"
 128             "#\n"
 129             "# (use \"passwd\" to change the password)\n"
 130             "##\n",
 131             pw->pw_name);
 132
 133 #ifdef DIRECTORY_SERVICE
 134         switch (dswhere) {
 135         case WHERE_FILES:
 136             (void)fprintf(fp,
 137                 "# Flat file: /etc/master.passwd\n"
 138                 "##\n");
 139             break;
 140         case WHERE_LOCALNI:
 141             (void)fprintf(fp,
 142                 "# Local NetInfo Database\n"
 143                 "##\n");
 144             break;
 145         }
 146         d.pw = pw;
 147         bp = pw->pw_gecos;
 148         p = strsep(&bp, ",");
 149         d.fullname =  (p ? p : "");
 150         p = strsep(&bp, ",");
 151         d.location = (p ? p : "");
 152         p = strsep(&bp, ",");
 153         d.officephone = (p ? p : "");
 154         p = strsep(&bp, ",");
 155         d.homephone = ( p ? p : "");
 156
 157         for (ep = list; ep->prompt; ep++)
 158                 if (!ep->restricted) {
 159                         ep->display(&d, fp);
 160                         ndisplayed++;
 161                 }
 162         if(!ndisplayed) {
 163                 (void)fprintf(fp, "###################################\n");
 164                 (void)fprintf(fp, "# No fields are available to change\n");
 165                 (void)fprintf(fp, "###################################\n");
 166         }
 167 #else /* DIRECTORY_SERVICE */
 168         (void)fprintf(fp,
 169             "##\n"
 170             "# User Database\n"
 171             "# \n"
 172             "# Note:  This program edits the /etc/master.passwd file which is only \n"
 173             "# consulted when the system is running in single-user mode.  At other times \n"
 174             "# this information is handled by lookupd.  By default, lookupd gets \n"
 175             "# information from NetInfo, so this file will not be consulted unless you \n"
 176             "# have changed lookupd's configuration.\n"
 177             "##\n");
 178
 179         if (!uid) {
 180                 (void)fprintf(fp, "Login: %s\n", pw->pw_name);
 181                 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
 182                 (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid);
 183                 (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid);
 184                 (void)fprintf(fp, "Change [month day year]: %s\n",
 185                     ttoa(pw->pw_change));
 186                 (void)fprintf(fp, "Expire [month day year]: %s\n",
 187                     ttoa(pw->pw_expire));
 188                 (void)fprintf(fp, "Class: %s\n", pw->pw_class);
 189                 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
 190                 (void)fprintf(fp, "Shell: %s\n",
 191                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 192         }
 193         /* Only admin can change "restricted" shells. */
 194         else if (ok_shell(pw->pw_shell))
 195                 /*
 196                  * Make shell a restricted field.  Ugly with a
 197                  * necklace, but there's not much else to do.
 198                  */
 199                 (void)fprintf(fp, "Shell: %s\n",
 200                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 201         else
 202                 list[E_SHELL].restricted = 1;
 203         bp = pw->pw_gecos;
 204         p = strsep(&bp, ",");
 205         (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
 206         p = strsep(&bp, ",");
 207         (void)fprintf(fp, "Location: %s\n", p ? p : "");
 208         p = strsep(&bp, ",");
 209         (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
 210         p = strsep(&bp, ",");
 211         (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
 212 #endif /* DIRECTORY_SERVICE */
 213
 214         (void)fchown(fd, getuid(), getgid());
 215         (void)fclose(fp);
 216 }
 217
 218 int
 219 verify(pw)
 220         struct passwd *pw;
 221 {
 222         ENTRY *ep;
 223         char *p;
 224         struct stat sb;
 225         FILE *fp;
 226         int len;
 227         char buf[LINE_MAX];
 228
 229         if (!(fp = fopen(tempname, "r")))
 230                 pw_error(tempname, 1, 1);
 231         if (fstat(fileno(fp), &sb))
 232                 pw_error(tempname, 1, 1);
 233         if (sb.st_size == 0) {
 234                 warnx("corrupted temporary file");
 235                 goto bad;
 236         }
 237         while (fgets(buf, sizeof(buf), fp)) {
 238                 if (!buf[0] || buf[0] == '#')
 239                         continue;
 240                 if (!(p = strchr(buf, '\n'))) {
 241                         warnx("line too long");
 242                         goto bad;
 243                 }
 244                 *p = '\0';
 245                 for (ep = list;; ++ep) {
 246                         if (!ep->prompt) {
 247                                 warnx("unrecognized field");
 248                                 goto bad;
 249                         }
 250                         if (!strncasecmp(buf, ep->prompt, ep->len)) {
 251                                 if (ep->restricted && uid) {
 252                                         warnx(
 253                                             "you may not change the %s field",
 254                                                 ep->prompt);
 255                                         goto bad;
 256                                 }
 257                                 if (!(p = strchr(buf, ':'))) {
 258                                         warnx("line corrupted");
 259                                         goto bad;
 260                                 }
 261                                 while (isspace(*++p));
 262                                 if (ep->except && strpbrk(p, ep->except)) {
 263                                         warnx(
 264                                    "illegal character in the \"%s\" field",
 265                                             ep->prompt);
 266                                         goto bad;
 267                                 }
 268                                 if ((ep->func)(p, pw, ep)) {
 269 bad:                                    (void)fclose(fp);
 270                                         return (0);
 271                                 }
 272                                 break;
 273                         }
 274                 }
 275         }
 276         (void)fclose(fp);
 277
 278         /* Build the gecos field. */
 279 #ifdef DIRECTORY_SERVICE
 280         if (list[E_NAME].save) {
 281                 if (list[E_LOCATE].save) {
 282 #endif /* DIRECTORY_SERVICE */
 283         len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
 284             strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
 285         if (!(p = malloc(len)))
 286                 err(1, NULL);
 287         (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save,
 288             list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
 289 #ifdef DIRECTORY_SERVICE
 290                 } else
 291                         pw->pw_gecos = list[E_NAME].save;
 292         } else
 293                 pw->pw_gecos = "";
 294 #endif /* DIRECTORY_SERVICE */
 295
 296         if (snprintf(buf, sizeof(buf),
 297             "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
 298             pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
 299             pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir,
 300             pw->pw_shell) >= sizeof(buf)) {
 301                 warnx("entries too long");
 302                 return (0);
 303         }
 304         return (pw_scan(buf, pw, NULL));
 305 }