pam_getenvlist.c revision 91100
1/*- 2 * Copyright (c) 2002 Networks Associates Technologies, Inc. 3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project by ThinkSec AS and 6 * NAI Labs, the Security Research Division of Network Associates, Inc. 7 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 8 * 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 * $Id$ 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 45 47 * 48 * Returns a list of all the PAM environment variables 49 */ 50 51char ** 52pam_getenvlist(pam_handle_t *pamh) 53{ 54 char **envlist; 55 int i; 56 57 if (pamh == NULL) 58 return (NULL); 59 60 envlist = malloc(sizeof(char *) * (pamh->env_count + 1)); 61 if (envlist == NULL) { 62 openpam_log(PAM_LOG_ERROR, "%s", 63 pam_strerror(pamh, PAM_BUF_ERR)); 64 return (NULL); 65 } 66 for (i = 0; i < pamh->env_count; ++i) { 67 if ((envlist[i] = strdup(pamh->env[i])) == NULL) { 68 while (i) 69 free(envlist[--i]); 70 free(envlist); 71 openpam_log(PAM_LOG_ERROR, "%s", 72 pam_strerror(pamh, PAM_BUF_ERR)); 73 return (NULL); 74 } 75 } 76 envlist[i] = NULL; 77 openpam_log(PAM_LOG_DEBUG, "returning %d variables\n", pamh->env_count); 78 return (envlist); 79} 80 81/** 82 * The =pam_getenvlist function returns a copy of the given PAM context's 83 * environment list as a pointer to an array of strings. 84 * The last element in the array is =NULL. 85 * The pointer is suitable for assignment to {Va environ}. 86 * 87 * The array and the strings it lists are allocated using =malloc, and 88 * should be released using =free after use: 89 * 90 * char **envlist, **env; 91 * 92 * envlist = environ; 93 * environ = pam_getenvlist(pamh); 94 * \/\* do something nifty \*\/ 95 * for (env = environ; *env != NULL; env++) 96 * free(*env); 97 * free(environ); 98 * environ = envlist; 99 * 100 * >environ 7 101 * >pam_getenv 102 * >pam_putenv 103 * >pam_setenv 104 */ 105