1 /* $NetBSD: pam_setenv.c,v 1.4 2023/06/30 21:46:21 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 38 #ifdef HAVE_CONFIG_H 39 # include "config.h" 40 #endif 41 42 #include <sys/cdefs.h> 43 __RCSID("$NetBSD: pam_setenv.c,v 1.4 2023/06/30 21:46:21 christos Exp $"); 44 45 #include <errno.h> 46 #include <stdlib.h> 47 #include <stdio.h> 48 #include <string.h> 49 50 #include <security/pam_appl.h> 51 52 #include "openpam_impl.h" 53 #include "openpam_asprintf.h" 54 55 /* 56 * OpenPAM extension 57 * 58 * Set the value of an environment variable 59 * Mirrors setenv(3) 60 */ 61 62 int 63 pam_setenv(pam_handle_t *pamh, 64 const char *name, 65 const char *value, 66 int overwrite) 67 { 68 char *env; 69 int r; 70 71 ENTER(); 72 73 /* sanity checks */ 74 if (*name == '\0' || strchr(name, '=') != NULL) { 75 errno = EINVAL; 76 RETURNC(PAM_SYSTEM_ERR); 77 } 78 79 /* is it already there? */ 80 if (!overwrite && openpam_findenv(pamh, name, strlen(name)) >= 0) 81 RETURNC(PAM_SUCCESS); 82 83 /* set it... */ 84 if (asprintf(&env, "%s=%s", name, value) < 0) 85 RETURNC(PAM_BUF_ERR); 86 r = pam_putenv(pamh, env); 87 FREE(env); 88 RETURNC(r); 89 } 90 91 /* 92 * Error codes: 93 * 94 * =pam_putenv 95 * PAM_SYSTEM_ERR 96 * PAM_BUF_ERR 97 */ 98 99 /** 100 * The =pam_setenv function sets an environment variable. 101 * Its semantics are similar to those of =setenv, but it modifies the PAM 102 * context's environment list instead of the application's. 103 * 104 * >pam_getenv 105 * >pam_getenvlist 106 * >pam_putenv 107 */ 108