freebsd-dev/contrib/openpam/lib/pam_setenv.c

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/*-
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* Copyright (c) 2002-2003 Networks Associates Technology, Inc.
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* All rights reserved.
*
* This software was developed for the FreeBSD Project by ThinkSec AS and
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* Network Associates Laboratories, the Security Research Division of
* Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
* ("CBOSS"), as part of the DARPA CHATS research program.
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*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
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* $P4: //depot/projects/openpam/lib/pam_setenv.c#12 $
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*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <security/pam_appl.h>
#include "openpam_impl.h"
/*
* OpenPAM extension
*
* Set the value of an environment variable
* Mirrors setenv(3)
*/
int
pam_setenv(pam_handle_t *pamh,
const char *name,
const char *value,
int overwrite)
{
char *env;
int r;
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ENTER();
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if (pamh == NULL)
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RETURNC(PAM_SYSTEM_ERR);
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/* sanity checks */
if (name == NULL || value == NULL || strchr(name, '=') != NULL)
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RETURNC(PAM_SYSTEM_ERR);
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/* is it already there? */
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if (!overwrite && openpam_findenv(pamh, name, strlen(name)) >= 0)
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RETURNC(PAM_SUCCESS);
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/* set it... */
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if (asprintf(&env, "%s=%s", name, value) < 0)
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RETURNC(PAM_BUF_ERR);
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r = pam_putenv(pamh, env);
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FREE(env);
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RETURNC(r);
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}
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/*
* Error codes:
*
* =pam_putenv
* PAM_SYSTEM_ERR
* PAM_BUF_ERR
*/
/**
* The =pam_setenv function sets a environment variable.
* Its semantics are similar to those of =setenv, but it modifies the PAM
* context's environment list instead of the application's.
*
* >pam_getenv
* >pam_getenvlist
* >pam_putenv
*/