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