contrib/openpam/lib/pam_getenv.c

   1 /*-
   2  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed for the FreeBSD Project by ThinkSec AS and
   6  * Network Associates Laboratories, the Security Research Division of
   7  * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
   8  * ("CBOSS"), as part of the DARPA CHATS research program.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote
  19  *    products derived from this software without specific prior written
  20  *    permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $P4: //depot/projects/openpam/lib/pam_getenv.c#16 $
  35  */
  36
  37 #include <stdlib.h>
  38 #include <string.h>
  39
  40 #include <security/pam_appl.h>
  41
  42 #include "openpam_impl.h"
  43
  44 /*
  45  * XSSO 4.2.1
  46  * XSSO 6 page 44
  47  *
  48  * Retrieve the value of a PAM environment variable
  49  */
  50
  51 const char *
  52 pam_getenv(pam_handle_t *pamh,
  53         const char *name)
  54 {
  55         char *str;
  56         int i;
  57
  58         ENTERS(name);
  59         if (pamh == NULL)
  60                 RETURNS(NULL);
  61         if (name == NULL || strchr(name, '=') != NULL)
  62                 RETURNS(NULL);
  63         if ((i = openpam_findenv(pamh, name, strlen(name))) < 0)
  64                 RETURNS(NULL);
  65         for (str = pamh->env[i]; *str != '\0'; ++str) {
  66                 if (*str == '=') {
  67                         ++str;
  68                         break;
  69                 }
  70         }
  71         RETURNS(str);
  72 }
  73
  74 /**
  75  * The =pam_getenv function returns the value of an environment variable.
  76  * Its semantics are similar to those of =getenv, but it accesses the PAM
  77  * context's environment list instead of the application's.
  78  *
  79  * >pam_getenvlist
  80  * >pam_putenv
  81  * >pam_setenv
  82  */