chpass.tproj/pw_copy.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 /*
  59  * This module is used to copy the master password file, replacing a single
  60  * record, by chpass(1) and passwd(1).
  61  */
  62
  63 #include <err.h>
  64 #include <pwd.h>
  65 #include <stdio.h>
  66 #include <string.h>
  67
  68 #include <pw_util.h>
  69 #include "pw_copy.h"
  70
  71 extern char *tempname;
  72
  73 void
  74 pw_copy(ffd, tfd, pw)
  75         int ffd, tfd;
  76         struct passwd *pw;
  77 {
  78         FILE *from, *to;
  79         int done;
  80         char *p, buf[8192];
  81
  82         if (!(from = fdopen(ffd, "r")))
  83                 pw_error(_PATH_MASTERPASSWD, 1, 1);
  84         if (!(to = fdopen(tfd, "w")))
  85                 pw_error(tempname, 1, 1);
  86
  87         for (done = 0; fgets(buf, sizeof(buf), from);) {
  88                 if (!strchr(buf, '\n')) {
  89                         warnx("%s: line too long", _PATH_MASTERPASSWD);
  90                         pw_error(NULL, 0, 1);
  91                 }
  92 #if defined(__APPLE__)
  93                 if (done || (buf[0] == '#')) {
  94 #else
  95                 if (done) {
  96 #endif
  97                         (void)fprintf(to, "%s", buf);
  98                         if (ferror(to))
  99                                 goto err;
 100                         continue;
 101                 }
 102                 if (!(p = strchr(buf, ':'))) {
 103                         warnx("%s: corrupted entry", _PATH_MASTERPASSWD);
 104                         pw_error(NULL, 0, 1);
 105                 }
 106                 *p = '\0';
 107                 if (strcmp(buf, pw->pw_name)) {
 108                         *p = ':';
 109                         (void)fprintf(to, "%s", buf);
 110                         if (ferror(to))
 111                                 goto err;
 112                         continue;
 113                 }
 114                 (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
 115                     pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
 116                     pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
 117                     pw->pw_dir, pw->pw_shell);
 118                 done = 1;
 119                 if (ferror(to))
 120                         goto err;
 121         }
 122         if (!done)
 123                 (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
 124                     pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
 125                     pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
 126                     pw->pw_dir, pw->pw_shell);
 127
 128         if (ferror(to))
 129 err:            pw_error(NULL, 1, 1);
 130         (void)fclose(to);
 131 }