[lttng-ust.git] / liblttng-ust / getenv.h

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _COMPAT_GETENV_H
#define _COMPAT_GETENV_H

#include "ust-helper.h"

/*
 * Always add the lttng-ust environment variables using the lttng_ust_getenv()
 * infrastructure rather than using getenv() directly.  This ensures that we
 * don't trigger races between getenv() invoked by lttng-ust listener threads
 * invoked concurrently with setenv() called by an otherwise single-threaded
 * application thread. (the application is not aware that it runs with
 * lttng-ust)
 */

LTTNG_HIDDEN
char *lttng_ust_getenv(const char *name);

LTTNG_HIDDEN
void lttng_ust_getenv_init(void);

#endif /* _COMPAT_GETENV_H */
Commit	Line	Data
730bf2af	1	/*
c0c0989a	2	* SPDX-License-Identifier: LGPL-2.1-only
730bf2af	3	*
c0c0989a	4	* Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
730bf2af MD	5	*/
730bf2af MD	6
c0c0989a MJ	7	#ifndef _COMPAT_GETENV_H
	8	#define _COMPAT_GETENV_H
	9
4c41b460 MJ	10	#include "ust-helper.h"
4c41b460 MJ	11
6f626d28	12	/*
4c41b460 MJ	13	* Always add the lttng-ust environment variables using the lttng_ust_getenv()
	14	* infrastructure rather than using getenv() directly. This ensures that we
	15	* don't trigger races between getenv() invoked by lttng-ust listener threads
	16	* invoked concurrently with setenv() called by an otherwise single-threaded
	17	* application thread. (the application is not aware that it runs with
	18	* lttng-ust)
6f626d28	19	*/
730bf2af	20
4c41b460 MJ	21	LTTNG_HIDDEN
4c41b460 MJ	22	char lttng_ust_getenv(const char name);
730bf2af	23
4c41b460	24	LTTNG_HIDDEN
6f626d28	25	void lttng_ust_getenv_init(void);
730bf2af MD	26
730bf2af MD	27	#endif /* _COMPAT_GETENV_H */