#ifndef _COMPAT_GETENV_H
#define _COMPAT_GETENV_H

/*
 * Copyright (C) 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; only
 * version 2.1 of the License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <usterr-signal-safe.h>

static inline
int lttng_is_setuid_setgid(void)
{
	return geteuid() != getuid() || getegid() != getgid();
}

static inline
char *lttng_secure_getenv(const char *name)
{
	if (lttng_is_setuid_setgid()) {
		ERR("Getting environment variable '%s' from setuid/setgid binary refused for security reasons.",
			name);
		return NULL;
	}
	return getenv(name);
}

#endif /* _COMPAT_GETENV_H */