chpass.tproj/field.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) 1988, 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
  60 #include <ctype.h>
  61 #include <err.h>
  62 #include <errno.h>
  63 #include <grp.h>
  64 #include <pwd.h>
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <unistd.h>
  69
  70 #include "chpass.h"
  71 #include "pathnames.h"
  72
  73 /* ARGSUSED */
  74 int
  75 p_login(p, pw, ep)
  76         char *p;
  77         struct passwd *pw;
  78         ENTRY *ep;
  79 {
  80         if (!*p) {
  81                 warnx("empty login field");
  82                 return (1);
  83         }
  84         if (*p == '-') {
  85                 warnx("login names may not begin with a hyphen");
  86                 return (1);
  87         }
  88         if (!(pw->pw_name = strdup(p))) {
  89                 warnx("can't save entry");
  90                 return (1);
  91         }
  92         if (strchr(p, '.'))
  93                 warnx("\'.\' is dangerous in a login name");
  94         for (; *p; ++p)
  95                 if (isupper(*p)) {
  96                         warnx("upper-case letters are dangerous in a login name");
  97                         break;
  98                 }
  99         return (0);
 100 }
 101
 102 /* ARGSUSED */
 103 int
 104 p_passwd(p, pw, ep)
 105         char *p;
 106         struct passwd *pw;
 107         ENTRY *ep;
 108 {
 109         if (!*p)
 110                 pw->pw_passwd = "";     /* "NOLOGIN"; */
 111         else if (!(pw->pw_passwd = strdup(p))) {
 112                 warnx("can't save password entry");
 113                 return (1);
 114         }
 115
 116         return (0);
 117 }
 118
 119 /* ARGSUSED */
 120 int
 121 p_uid(p, pw, ep)
 122         char *p;
 123         struct passwd *pw;
 124         ENTRY *ep;
 125 {
 126         uid_t id;
 127         char *np;
 128
 129         if (!*p) {
 130                 warnx("empty uid field");
 131                 return (1);
 132         }
 133         if (!isdigit(*p)) {
 134                 warnx("illegal uid");
 135                 return (1);
 136         }
 137         errno = 0;
 138         id = strtoul(p, &np, 10);
 139         if (*np || (id == ULONG_MAX && errno == ERANGE)) {
 140                 warnx("illegal uid");
 141                 return (1);
 142         }
 143         pw->pw_uid = id;
 144         return (0);
 145 }
 146
 147 /* ARGSUSED */
 148 int
 149 p_gid(p, pw, ep)
 150         char *p;
 151         struct passwd *pw;
 152         ENTRY *ep;
 153 {
 154         struct group *gr;
 155         gid_t id;
 156         char *np;
 157
 158         if (!*p) {
 159                 warnx("empty gid field");
 160                 return (1);
 161         }
 162         if (!isdigit(*p)) {
 163                 if (!(gr = getgrnam(p))) {
 164                         warnx("unknown group %s", p);
 165                         return (1);
 166                 }
 167                 pw->pw_gid = gr->gr_gid;
 168                 return (0);
 169         }
 170         errno = 0;
 171         id = strtoul(p, &np, 10);
 172         if (*np || (id == ULONG_MAX && errno == ERANGE)) {
 173                 warnx("illegal gid");
 174                 return (1);
 175         }
 176         pw->pw_gid = id;
 177         return (0);
 178 }
 179
 180 /* ARGSUSED */
 181 int
 182 p_class(p, pw, ep)
 183         char *p;
 184         struct passwd *pw;
 185         ENTRY *ep;
 186 {
 187         if (!*p)
 188                 pw->pw_class = "";
 189         else if (!(pw->pw_class = strdup(p))) {
 190                 warnx("can't save entry");
 191                 return (1);
 192         }
 193
 194         return (0);
 195 }
 196
 197 /* ARGSUSED */
 198 int
 199 p_change(p, pw, ep)
 200         char *p;
 201         struct passwd *pw;
 202         ENTRY *ep;
 203 {
 204         if (!atot(p, &pw->pw_change))
 205                 return (0);
 206         warnx("illegal date for change field");
 207         return (1);
 208 }
 209
 210 /* ARGSUSED */
 211 int
 212 p_expire(p, pw, ep)
 213         char *p;
 214         struct passwd *pw;
 215         ENTRY *ep;
 216 {
 217         if (!atot(p, &pw->pw_expire))
 218                 return (0);
 219         warnx("illegal date for expire field");
 220         return (1);
 221 }
 222
 223 /* ARGSUSED */
 224 int
 225 p_gecos(p, pw, ep)
 226         char *p;
 227         struct passwd *pw;
 228         ENTRY *ep;
 229 {
 230         if (!*p)
 231                 ep->save = "";
 232         else if (!(ep->save = strdup(p))) {
 233                 warnx("can't save entry");
 234                 return (1);
 235         }
 236         return (0);
 237 }
 238
 239 /* ARGSUSED */
 240 int
 241 p_hdir(p, pw, ep)
 242         char *p;
 243         struct passwd *pw;
 244         ENTRY *ep;
 245 {
 246         if (!*p) {
 247                 warnx("empty home directory field");
 248                 return (1);
 249         }
 250         if (!(pw->pw_dir = strdup(p))) {
 251                 warnx("can't save entry");
 252                 return (1);
 253         }
 254         return (0);
 255 }
 256
 257 /* ARGSUSED */
 258 int
 259 p_shell(p, pw, ep)
 260         char *p;
 261         struct passwd *pw;
 262         ENTRY *ep;
 263 {
 264         char *t, *ok_shell();
 265
 266         if (!*p) {
 267                 pw->pw_shell = _PATH_BSHELL;
 268                 return (0);
 269         }
 270         /* only admin can change from or to "restricted" shells */
 271         if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) {
 272                 warnx("%s: current shell non-standard", pw->pw_shell);
 273                 return (1);
 274         }
 275         if (!(t = ok_shell(p))) {
 276                 if (uid) {
 277                         warnx("%s: non-standard shell", p);
 278                         return (1);
 279                 }
 280         }
 281         else
 282                 p = t;
 283         if (!(pw->pw_shell = strdup(p))) {
 284                 warnx("can't save entry");
 285                 return (1);
 286         }
 287         return (0);
 288 }