1/*- 2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3 * Copyright (c) 2004-2007 Dag-Erling Smørgrav 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by ThinkSec AS and 7 * Network Associates Laboratories, the Security Research Division of 8 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 9 * ("CBOSS"), as part of the DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of the author may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $Id: pam_putenv.c 408 2007-12-21 11:36:24Z des $ 36 */ 37 38#include <stdlib.h> 39#include <string.h> 40 41#include <security/pam_appl.h> 42 43#include "openpam_impl.h" 44 45/* 46 * XSSO 4.2.1 47 * XSSO 6 page 56 48 * 49 * Set the value of an environment variable 50 */ 51 52int 53pam_putenv(pam_handle_t *pamh, 54 const char *namevalue) 55{ 56 char **env, *p; 57 int i; 58 59 ENTER(); 60 if (pamh == NULL) 61 RETURNC(PAM_SYSTEM_ERR); 62 63 /* sanity checks */ 64 if (namevalue == NULL || (p = strchr(namevalue, '=')) == NULL) 65 RETURNC(PAM_SYSTEM_ERR); 66 67 /* see if the variable is already in the environment */ 68 if ((i = openpam_findenv(pamh, namevalue, p - namevalue)) >= 0) { 69 if ((p = strdup(namevalue)) == NULL) 70 RETURNC(PAM_BUF_ERR); 71 FREE(pamh->env[i]); 72 pamh->env[i] = p; 73 RETURNC(PAM_SUCCESS); 74 } 75 76 /* grow the environment list if necessary */ 77 if (pamh->env_count == pamh->env_size) { 78 env = realloc(pamh->env, 79 sizeof(char *) * (pamh->env_size * 2 + 1)); 80 if (env == NULL) 81 RETURNC(PAM_BUF_ERR); 82 pamh->env = env; 83 pamh->env_size = pamh->env_size * 2 + 1; 84 } 85 86 /* add the variable at the end */ 87 if ((pamh->env[pamh->env_count] = strdup(namevalue)) == NULL) 88 RETURNC(PAM_BUF_ERR); 89 ++pamh->env_count; 90 RETURNC(PAM_SUCCESS); 91} 92 93/* 94 * Error codes: 95 * 96 * PAM_SYSTEM_ERR 97 * PAM_BUF_ERR 98 */ 99 100/** 101 * The =pam_putenv function sets a environment variable. 102 * Its semantics are similar to those of =putenv, but it modifies the PAM 103 * context's environment list instead of the application's. 104 * 105 * >pam_getenv 106 * >pam_getenvlist 107 * >pam_setenv 108 * >pam_unsetenv 109 */ 110