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
  76 extern char *tempname;
  77
  78 void
  79 edit(pw)
  80         struct passwd *pw;
  81 {
  82         struct stat begin, end;
  83
  84         for (;;) {
  85                 if (stat(tempname, &begin))
  86                         pw_error(tempname, 1, 1);
  87                 pw_edit(1);
  88                 if (stat(tempname, &end))
  89                         pw_error(tempname, 1, 1);
  90                 if (begin.st_mtime == end.st_mtime) {
  91                         warnx("no changes made");
  92                         pw_error(NULL, 0, 0);
  93                 }
  94                 if (verify(pw))
  95                         break;
  96                 pw_prompt();
  97         }
  98 }
  99
 100 /*
 101  * display --
 102  *      print out the file for the user to edit; strange side-effect:
 103  *      set conditional flag if the user gets to edit the shell.
 104  */
 105 void
 106 display(fd, pw)
 107         int fd;
 108         struct passwd *pw;
 109 {
 110         FILE *fp;
 111         char *bp, *p, *ttoa();
 112
 113         if (!(fp = fdopen(fd, "w")))
 114                 pw_error(tempname, 1, 1);
 115
 116         (void)fprintf(fp,
 117             "#Changing user database information for %s.\n", pw->pw_name);
 118         if (!uid) {
 119                 (void)fprintf(fp, "Login: %s\n", pw->pw_name);
 120                 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
 121                 (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid);
 122                 (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid);
 123                 (void)fprintf(fp, "Change [month day year]: %s\n",
 124                     ttoa(pw->pw_change));
 125                 (void)fprintf(fp, "Expire [month day year]: %s\n",
 126                     ttoa(pw->pw_expire));
 127                 (void)fprintf(fp, "Class: %s\n", pw->pw_class);
 128                 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
 129                 (void)fprintf(fp, "Shell: %s\n",
 130                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 131         }
 132         /* Only admin can change "restricted" shells. */
 133         else if (ok_shell(pw->pw_shell))
 134                 /*
 135                  * Make shell a restricted field.  Ugly with a
 136                  * necklace, but there's not much else to do.
 137                  */
 138                 (void)fprintf(fp, "Shell: %s\n",
 139                     *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
 140         else
 141                 list[E_SHELL].restricted = 1;
 142         bp = pw->pw_gecos;
 143         p = strsep(&bp, ",");
 144         (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
 145         p = strsep(&bp, ",");
 146         (void)fprintf(fp, "Location: %s\n", p ? p : "");
 147         p = strsep(&bp, ",");
 148         (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
 149         p = strsep(&bp, ",");
 150         (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
 151
 152         (void)fchown(fd, getuid(), getgid());
 153         (void)fclose(fp);
 154 }
 155
 156 int
 157 verify(pw)
 158         struct passwd *pw;
 159 {
 160         ENTRY *ep;
 161         char *p;
 162         struct stat sb;
 163         FILE *fp;
 164         int len;
 165         char buf[LINE_MAX];
 166
 167         if (!(fp = fopen(tempname, "r")))
 168                 pw_error(tempname, 1, 1);
 169         if (fstat(fileno(fp), &sb))
 170                 pw_error(tempname, 1, 1);
 171         if (sb.st_size == 0) {
 172                 warnx("corrupted temporary file");
 173                 goto bad;
 174         }
 175         while (fgets(buf, sizeof(buf), fp)) {
 176                 if (!buf[0] || buf[0] == '#')
 177                         continue;
 178                 if (!(p = strchr(buf, '\n'))) {
 179                         warnx("line too long");
 180                         goto bad;
 181                 }
 182                 *p = '\0';
 183                 for (ep = list;; ++ep) {
 184                         if (!ep->prompt) {
 185                                 warnx("unrecognized field");
 186                                 goto bad;
 187                         }
 188                         if (!strncasecmp(buf, ep->prompt, ep->len)) {
 189                                 if (ep->restricted && uid) {
 190                                         warnx(
 191                                             "you may not change the %s field",
 192                                                 ep->prompt);
 193                                         goto bad;
 194                                 }
 195                                 if (!(p = strchr(buf, ':'))) {
 196                                         warnx("line corrupted");
 197                                         goto bad;
 198                                 }
 199                                 while (isspace(*++p));
 200                                 if (ep->except && strpbrk(p, ep->except)) {
 201                                         warnx(
 202                                    "illegal character in the \"%s\" field",
 203                                             ep->prompt);
 204                                         goto bad;
 205                                 }
 206                                 if ((ep->func)(p, pw, ep)) {
 207 bad:                                    (void)fclose(fp);
 208                                         return (0);
 209                                 }
 210                                 break;
 211                         }
 212                 }
 213         }
 214         (void)fclose(fp);
 215
 216         /* Build the gecos field. */
 217         len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
 218             strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
 219         if (!(p = malloc(len)))
 220                 err(1, NULL);
 221         (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save,
 222             list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
 223
 224         if (snprintf(buf, sizeof(buf),
 225             "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
 226             pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
 227             pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir,
 228             pw->pw_shell) >= sizeof(buf)) {
 229                 warnx("entries too long");
 230                 return (0);
 231         }
 232         return (pw_scan(buf, pw));
 233 }