chpass.tproj/edit.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*-
  25  * Copyright (c) 1990, 1993, 1994
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #include <sys/param.h>
  58 #include <sys/stat.h>
  59
  60 #include <ctype.h>
  61 #include <err.h>
  62 #include <errno.h>
  63 #include <paths.h>
  64 #include <pwd.h>
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <unistd.h>
  69
  70 #include <pw_scan.h>
  71 #include <pw_util.h>
  72
  73 #include "chpass.h"
  74 #ifdef DIRECTORY_SERVICE
  75 #include "directory_service.h"
  76
  77 extern int dswhere;
  78 #endif /* DIRECTORY_SERVICE */
  79
  80 extern char *tempname;
  81
  82 void
  83 edit(pw)
  84         struct passwd *pw;
  85 {
  86         struct stat begin, end;
  87
  88         for (;;) {
  89                 if (stat(tempname, &begin))
  90                         pw_error(tempname, 1, 1);
  91                 pw_edit(1);
  92                 if (stat(tempname, &end))
  93                         pw_error(tempname, 1, 1);
  94                 if (begin.st_mtime == end.st_mtime) {
  95                         warnx("no changes made");
  96                         pw_error(NULL, 0, 0);
  97                 }
  98                 if (verify(pw))
  99                         break;
 100                 pw_prompt();
 101         }
 102 }
 103
 104 /*
 105  * display --
 106  *      print out the file for the user to edit; strange side-effect:
 107  *      set conditional flag if the user gets to edit the shell.
 108  */
 109 void
 110 display(fd, pw)
 111         int fd;
 112         struct passwd *pw;
 113 {
 114         FILE *fp;
 115         char *bp, *p, *ttoa();
 116 #ifdef DIRECTORY_SERVICE
 117         ENTRY *ep;
 118         struct display d;
 119         int ndisplayed = 0;
 120 #endif /* DIRECTORY_SERVICE */
 121
 122         if (!(fp = fdopen(fd, "w")))
 123                 pw_error(tempname, 1, 1);
 124
 125         (void)fprintf(fp,
 126             "# Changing user database information for %s.\n"
 127             "#\n"
 128             "# (use \"passwd\" to change the password)\n"
 129             "##\n",
 130             pw->pw_name);
 131
 132 #ifdef DIRECTORY_SERVICE
 133         switch (dswhere) {
 134         case WHERE_FILES:
 135             (void)fprintf(fp,
 136                 "# Flat file: /etc/master.passwd\n"
 137                 "##\n");
 138             break;
 139         case WHERE_LOCALNI:
 140             (void)fprintf(fp,
 141                 "# Local NetInfo Database\n"
 142                 "##\n");
 143             break;
 144         }
 145         d.pw = pw;
 146         bp = pw->pw_gecos;
 147         p = strsep(&bp, ",");
 148         d.fullname =  (p ? p : "");
 149         p = strsep(&bp, ",");
 150         d.location = (p ? p : "");
 151         p = strsep(&bp, ",");
 152         d.officephone = (p ? p : "");
 153         p = strsep(&bp, ",");
 154         d.homephone = ( p ? p : "");
 155
 156         for (ep = list; ep->prompt; ep++)
 157                 if (!ep->restricted) {
 158                         ep->display(&d, fp);
 159                         ndisplayed++;
 160                 }
 161         if(!ndisplayed) {
 162                 (void)fprintf(fp, "###################################\n");
 163                 (void)fprintf(fp, "# No fields are available to change\n");
 164                 (void)fprintf(fp, "###################################\n");
 165         }
 166 #else /* DIRECTORY_SERVICE */
 167         (void)fprintf(fp,
 168             "##\n"
 169             "# User Database\n"
 170             "# \n"
 171             "# Note:  This program edits the /etc/master.passwd file which is only \n"
 172             "# consulted when the system is running in single-user mode.  At other times \n"
 173             "# this information is handled by lookupd.  By default, lookupd gets \n"
 174             "# information from NetInfo, so this file will not be consulted unless you \n"
 175             "# have changed lookupd's configuration.\n"
 176             "##\n");
 177
 178         if (!uid) {
 179                 (void)fprintf(fp, "Login: %s\n", pw->pw_name);
 180                 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
 181                 (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid);
 182                 (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid);
 183                 (void)fprintf(fp, "Change [month day year]: %s\n",
 184                     ttoa(pw->pw_change));
 185                 (void)fprintf(fp, "Expire [month day year]: %s\n",
 186                     ttoa(pw->pw_expire));
 187                 (void)fprintf(fp, "Class: %s\n", pw->pw_class);
 188                 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
 189                 (void)fprintf(fp, "Shell: %s\n",
 190                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 191         }
 192         /* Only admin can change "restricted" shells. */
 193         else if (ok_shell(pw->pw_shell))
 194                 /*
 195                  * Make shell a restricted field.  Ugly with a
 196                  * necklace, but there's not much else to do.
 197                  */
 198                 (void)fprintf(fp, "Shell: %s\n",
 199                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 200         else
 201                 list[E_SHELL].restricted = 1;
 202         bp = pw->pw_gecos;
 203         p = strsep(&bp, ",");
 204         (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
 205         p = strsep(&bp, ",");
 206         (void)fprintf(fp, "Location: %s\n", p ? p : "");
 207         p = strsep(&bp, ",");
 208         (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
 209         p = strsep(&bp, ",");
 210         (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
 211 #endif /* DIRECTORY_SERVICE */
 212
 213         (void)fchown(fd, getuid(), getgid());
 214         (void)fclose(fp);
 215 }
 216
 217 int
 218 verify(pw)
 219         struct passwd *pw;
 220 {
 221         ENTRY *ep;
 222         char *p;
 223         struct stat sb;
 224         FILE *fp;
 225         int len;
 226         static char buf[LINE_MAX];
 227
 228         if (!(fp = fopen(tempname, "r")))
 229                 pw_error(tempname, 1, 1);
 230         if (fstat(fileno(fp), &sb))
 231                 pw_error(tempname, 1, 1);
 232         if (sb.st_size == 0) {
 233                 warnx("corrupted temporary file");
 234                 goto bad;
 235         }
 236         while (fgets(buf, sizeof(buf), fp)) {
 237                 if (!buf[0] || buf[0] == '#')
 238                         continue;
 239                 if (!(p = strchr(buf, '\n'))) {
 240                         warnx("line too long");
 241                         goto bad;
 242                 }
 243                 *p = '\0';
 244                 for (ep = list;; ++ep) {
 245                         if (!ep->prompt) {
 246                                 warnx("unrecognized field");
 247                                 goto bad;
 248                         }
 249                         if (!strncasecmp(buf, ep->prompt, ep->len)) {
 250                                 if (ep->restricted && uid) {
 251                                         warnx(
 252                                             "you may not change the %s field",
 253                                                 ep->prompt);
 254                                         goto bad;
 255                                 }
 256                                 if (!(p = strchr(buf, ':'))) {
 257                                         warnx("line corrupted");
 258                                         goto bad;
 259                                 }
 260                                 while (isspace(*++p));
 261                                 if (ep->except && strpbrk(p, ep->except)) {
 262                                         warnx(
 263                                    "illegal character in the \"%s\" field",
 264                                             ep->prompt);
 265                                         goto bad;
 266                                 }
 267                                 if ((ep->func)(p, pw, ep)) {
 268 bad:                                    (void)fclose(fp);
 269                                         return (0);
 270                                 }
 271                                 break;
 272                         }
 273                 }
 274         }
 275         (void)fclose(fp);
 276
 277         /* Build the gecos field. */
 278 #ifdef DIRECTORY_SERVICE
 279         if (list[E_NAME].save) {
 280                 if (list[E_LOCATE].save) {
 281 #endif /* DIRECTORY_SERVICE */
 282         len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
 283             strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
 284         if (!(p = malloc(len)))
 285                 err(1, NULL);
 286         (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save,
 287             list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
 288 #ifdef DIRECTORY_SERVICE
 289                 } else
 290                         pw->pw_gecos = list[E_NAME].save;
 291         } else
 292                 pw->pw_gecos = "";
 293 #endif /* DIRECTORY_SERVICE */
 294
 295         if (snprintf(buf, sizeof(buf),
 296             "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
 297             pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
 298             pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir,
 299             pw->pw_shell) >= sizeof(buf)) {
 300                 warnx("entries too long");
 301                 return (0);
 302         }
 303         return (pw_scan(buf, pw, NULL));
 304 }