1 /*- 2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3 * Copyright (c) 2004-2017 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 36 #ifdef HAVE_CONFIG_H 37 # include "config.h" 38 #endif 39 40 #include <errno.h> 41 #include <stdlib.h> 42 #include <stdio.h> 43 #include <string.h> 44 45 #include <security/pam_appl.h> 46 47 #include "openpam_impl.h" 48 #include "openpam_asprintf.h" 49 50 /* 51 * OpenPAM extension 52 * 53 * Set the value of an environment variable 54 * Mirrors setenv(3) 55 */ 56 57 int 58 pam_setenv(pam_handle_t *pamh, 59 const char *name, 60 const char *value, 61 int overwrite) 62 { 63 char *env; 64 int r; 65 66 ENTER(); 67 68 /* sanity checks */ 69 if (*name == '\0' || strchr(name, '=') != NULL) { 70 errno = EINVAL; 71 RETURNC(PAM_SYSTEM_ERR); 72 } 73 74 /* is it already there? */ 75 if (!overwrite && openpam_findenv(pamh, name, strlen(name)) >= 0) 76 RETURNC(PAM_SUCCESS); 77 78 /* set it... */ 79 if (asprintf(&env, "%s=%s", name, value) < 0) 80 RETURNC(PAM_BUF_ERR); 81 r = pam_putenv(pamh, env); 82 FREE(env); 83 RETURNC(r); 84 } 85 86 /* 87 * Error codes: 88 * 89 * =pam_putenv 90 * PAM_SYSTEM_ERR 91 * PAM_BUF_ERR 92 */ 93 94 /** 95 * The =pam_setenv function sets an environment variable. 96 * Its semantics are similar to those of =setenv, but it modifies the PAM 97 * context's environment list instead of the application's. 98 * 99 * >pam_getenv 100 * >pam_getenvlist 101 * >pam_putenv 102 */ 103