1 /* $NetBSD: pam_setenv.c,v 1.3 2017/05/06 19:50:10 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2004-2017 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 * $OpenPAM: pam_setenv.c 938 2017-04-30 21:34:42Z des $ 38 */ 39 40 #ifdef HAVE_CONFIG_H 41 # include "config.h" 42 #endif 43 44 #include <sys/cdefs.h> 45 __RCSID("$NetBSD: pam_setenv.c,v 1.3 2017/05/06 19:50:10 christos Exp $"); 46 47 #include <errno.h> 48 #include <stdlib.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include <security/pam_appl.h> 53 54 #include "openpam_impl.h" 55 #include "openpam_asprintf.h" 56 57 /* 58 * OpenPAM extension 59 * 60 * Set the value of an environment variable 61 * Mirrors setenv(3) 62 */ 63 64 int 65 pam_setenv(pam_handle_t *pamh, 66 const char *name, 67 const char *value, 68 int overwrite) 69 { 70 char *env; 71 int r; 72 73 ENTER(); 74 75 /* sanity checks */ 76 if (*name == '\0' || strchr(name, '=') != NULL) { 77 errno = EINVAL; 78 RETURNC(PAM_SYSTEM_ERR); 79 } 80 81 /* is it already there? */ 82 if (!overwrite && openpam_findenv(pamh, name, strlen(name)) >= 0) 83 RETURNC(PAM_SUCCESS); 84 85 /* set it... */ 86 if (asprintf(&env, "%s=%s", name, value) < 0) 87 RETURNC(PAM_BUF_ERR); 88 r = pam_putenv(pamh, env); 89 FREE(env); 90 RETURNC(r); 91 } 92 93 /* 94 * Error codes: 95 * 96 * =pam_putenv 97 * PAM_SYSTEM_ERR 98 * PAM_BUF_ERR 99 */ 100 101 /** 102 * The =pam_setenv function sets an environment variable. 103 * Its semantics are similar to those of =setenv, but it modifies the PAM 104 * context's environment list instead of the application's. 105 * 106 * >pam_getenv 107 * >pam_getenvlist 108 * >pam_putenv 109 */ 110