pam_getenvlist.c revision 116520
191094Sdes/*- 2115619Sdes * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 391094Sdes * All rights reserved. 491094Sdes * 591094Sdes * This software was developed for the FreeBSD Project by ThinkSec AS and 699158Sdes * Network Associates Laboratories, the Security Research Division of 799158Sdes * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 899158Sdes * ("CBOSS"), as part of the DARPA CHATS research program. 991094Sdes * 1091094Sdes * Redistribution and use in source and binary forms, with or without 1191094Sdes * modification, are permitted provided that the following conditions 1291094Sdes * are met: 1391094Sdes * 1. Redistributions of source code must retain the above copyright 1491094Sdes * notice, this list of conditions and the following disclaimer. 1591094Sdes * 2. Redistributions in binary form must reproduce the above copyright 1691094Sdes * notice, this list of conditions and the following disclaimer in the 1791094Sdes * documentation and/or other materials provided with the distribution. 1891094Sdes * 3. The name of the author may not be used to endorse or promote 1991094Sdes * products derived from this software without specific prior written 2091094Sdes * permission. 2191094Sdes * 2291094Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2391094Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2491094Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2591094Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2691094Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2791094Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2891094Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2991094Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3091094Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3191094Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3291094Sdes * SUCH DAMAGE. 3391094Sdes * 34116520Sdes * $P4: //depot/projects/openpam/lib/pam_getenvlist.c#13 $ 3591094Sdes */ 3691094Sdes 3791094Sdes#include <stdlib.h> 3891094Sdes#include <string.h> 3991094Sdes 4091094Sdes#include <security/pam_appl.h> 4191094Sdes 4291094Sdes#include "openpam_impl.h" 4391100Sdes 4491094Sdes/* 4591094Sdes * XSSO 4.2.1 4691094Sdes * XSSO 6 page 45 4791094Sdes * 4891094Sdes * Returns a list of all the PAM environment variables 4991094Sdes */ 5091094Sdes 5191094Sdeschar ** 5291094Sdespam_getenvlist(pam_handle_t *pamh) 5391094Sdes{ 5491094Sdes char **envlist; 5591094Sdes int i; 5691094Sdes 57107937Sdes ENTER(); 5891094Sdes if (pamh == NULL) 59107937Sdes RETURNP(NULL); 6091100Sdes envlist = malloc(sizeof(char *) * (pamh->env_count + 1)); 6191100Sdes if (envlist == NULL) { 6291100Sdes openpam_log(PAM_LOG_ERROR, "%s", 6391100Sdes pam_strerror(pamh, PAM_BUF_ERR)); 64107937Sdes RETURNP(NULL); 6591100Sdes } 6691094Sdes for (i = 0; i < pamh->env_count; ++i) { 6791094Sdes if ((envlist[i] = strdup(pamh->env[i])) == NULL) { 68116520Sdes while (i) { 69116520Sdes --i; 70116520Sdes FREE(envlist[i]); 71116520Sdes } 72115619Sdes FREE(envlist); 7391100Sdes openpam_log(PAM_LOG_ERROR, "%s", 7491100Sdes pam_strerror(pamh, PAM_BUF_ERR)); 75107937Sdes RETURNP(NULL); 7691094Sdes } 7791094Sdes } 7891100Sdes envlist[i] = NULL; 79107937Sdes RETURNP(envlist); 8091094Sdes} 8191100Sdes 8291100Sdes/** 8391100Sdes * The =pam_getenvlist function returns a copy of the given PAM context's 8491100Sdes * environment list as a pointer to an array of strings. 8591100Sdes * The last element in the array is =NULL. 8691100Sdes * The pointer is suitable for assignment to {Va environ}. 8791100Sdes * 8891100Sdes * The array and the strings it lists are allocated using =malloc, and 8991100Sdes * should be released using =free after use: 9091100Sdes * 9191100Sdes * char **envlist, **env; 9299158Sdes * 9391100Sdes * envlist = environ; 9491100Sdes * environ = pam_getenvlist(pamh); 9591100Sdes * \/\* do something nifty \*\/ 9691100Sdes * for (env = environ; *env != NULL; env++) 9791100Sdes * free(*env); 9891100Sdes * free(environ); 9991100Sdes * environ = envlist; 10091100Sdes * 10191100Sdes * >environ 7 10291100Sdes * >pam_getenv 10391100Sdes * >pam_putenv 10491100Sdes * >pam_setenv 10591100Sdes */ 106