1 /* $NetBSD: pam_putenv.c,v 1.2 2014/10/24 18:17:56 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2004-2011 Dag-Erling Smørgrav 6 * All rights reserved. 7 * 8 * This software was developed for the FreeBSD Project by ThinkSec AS and 9 * Network Associates Laboratories, the Security Research Division of 10 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 11 * ("CBOSS"), as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote 22 * products derived from this software without specific prior written 23 * permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * Id: pam_putenv.c 648 2013-03-05 17:54:27Z des 38 */ 39 40 #ifdef HAVE_CONFIG_H 41 # include "config.h" 42 #endif 43 44 #include <sys/cdefs.h> 45 __RCSID("$NetBSD: pam_putenv.c,v 1.2 2014/10/24 18:17:56 christos Exp $"); 46 47 #include <stdlib.h> 48 #include <string.h> 49 50 #include <security/pam_appl.h> 51 52 #include "openpam_impl.h" 53 54 /* 55 * XSSO 4.2.1 56 * XSSO 6 page 56 57 * 58 * Set the value of an environment variable 59 */ 60 61 int 62 pam_putenv(pam_handle_t *pamh, 63 const char *namevalue) 64 { 65 char **env, *p; 66 int i; 67 68 ENTER(); 69 if (pamh == NULL) 70 RETURNC(PAM_SYSTEM_ERR); 71 72 /* sanity checks */ 73 if (namevalue == NULL || (p = strchr(namevalue, '=')) == NULL) 74 RETURNC(PAM_SYSTEM_ERR); 75 76 /* see if the variable is already in the environment */ 77 if ((i = openpam_findenv(pamh, namevalue, 78 (size_t)(p - namevalue))) >= 0) { 79 if ((p = strdup(namevalue)) == NULL) 80 RETURNC(PAM_BUF_ERR); 81 FREE(pamh->env[i]); 82 pamh->env[i] = p; 83 RETURNC(PAM_SUCCESS); 84 } 85 86 /* grow the environment list if necessary */ 87 if (pamh->env_count == pamh->env_size) { 88 env = realloc(pamh->env, 89 sizeof(*env) * ((size_t)pamh->env_size * 2 + 1)); 90 if (env == NULL) 91 RETURNC(PAM_BUF_ERR); 92 pamh->env = env; 93 pamh->env_size = pamh->env_size * 2 + 1; 94 } 95 96 /* add the variable at the end */ 97 if ((pamh->env[pamh->env_count] = strdup(namevalue)) == NULL) 98 RETURNC(PAM_BUF_ERR); 99 ++pamh->env_count; 100 RETURNC(PAM_SUCCESS); 101 } 102 103 /* 104 * Error codes: 105 * 106 * PAM_SYSTEM_ERR 107 * PAM_BUF_ERR 108 */ 109 110 /** 111 * The =pam_putenv function sets an environment variable. 112 * Its semantics are similar to those of =putenv, but it modifies the PAM 113 * context's environment list instead of the application's. 114 * 115 * >pam_getenv 116 * >pam_getenvlist 117 * >pam_setenv 118 */ 119