chpass.tproj/pw_copy.c

   1 /*
   2  * Copyright (c) 1999-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*-
  24  * Copyright (c) 1990, 1993, 1994
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  */
  55
  56 /*
  57  * This module is used to copy the master password file, replacing a single
  58  * record, by chpass(1) and passwd(1).
  59  */
  60
  61 #include <err.h>
  62 #include <pwd.h>
  63 #include <stdio.h>
  64 #include <string.h>
  65
  66 #include <pw_util.h>
  67 #include "pw_copy.h"
  68
  69 extern char *tempname;
  70
  71 void
  72 pw_copy(int ffd, int tfd, struct passwd *pw)
  73 {
  74         FILE *from, *to;
  75         int done;
  76         char *p, buf[8192];
  77
  78         if (!(from = fdopen(ffd, "r")))
  79                 pw_error(_PATH_MASTERPASSWD, 1, 1);
  80         if (!(to = fdopen(tfd, "w")))
  81                 pw_error(tempname, 1, 1);
  82
  83         for (done = 0; fgets(buf, sizeof(buf), from);) {
  84                 if (!strchr(buf, '\n')) {
  85                         warnx("%s: line too long", _PATH_MASTERPASSWD);
  86                         pw_error(NULL, 0, 1);
  87                 }
  88 #if defined(__APPLE__)
  89                 if (done || (buf[0] == '#')) {
  90 #else
  91                 if (done) {
  92 #endif
  93                         (void)fprintf(to, "%s", buf);
  94                         if (ferror(to))
  95                                 goto err;
  96                         continue;
  97                 }
  98                 if (!(p = strchr(buf, ':'))) {
  99                         warnx("%s: corrupted entry", _PATH_MASTERPASSWD);
 100                         pw_error(NULL, 0, 1);
 101                 }
 102                 *p = '\0';
 103                 if (strcmp(buf, pw->pw_name)) {
 104                         *p = ':';
 105                         (void)fprintf(to, "%s", buf);
 106                         if (ferror(to))
 107                                 goto err;
 108                         continue;
 109                 }
 110                 (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
 111                     pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
 112                     pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
 113                     pw->pw_dir, pw->pw_shell);
 114                 done = 1;
 115                 if (ferror(to))
 116                         goto err;
 117         }
 118         if (!done)
 119                 (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
 120                     pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
 121                     pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
 122                     pw->pw_dir, pw->pw_shell);
 123
 124         if (ferror(to))
 125 err:            pw_error(NULL, 1, 1);
 126         (void)fclose(to);
 127 }