[lttng-ust.git] / src / common / getenv.h

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

#ifndef _UST_COMMON_GETENV_H
#define _UST_COMMON_GETENV_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)
 */

char *lttng_ust_getenv(const char *name)
	__attribute__((visibility("hidden")));


/*
 * Initialize the internal filtered list of environment variables.
 */
void lttng_ust_getenv_init(void)
	__attribute__((visibility("hidden")));

#endif /* _UST_COMMON_GETENV_H */
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: LGPL-2.1-only
	3	*
	4	* Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*/
	6
	7	#ifndef _UST_COMMON_GETENV_H
	8	#define _UST_COMMON_GETENV_H
	9
	10	/*
	11	* Always add the lttng-ust environment variables using the lttng_ust_getenv()
	12	* infrastructure rather than using getenv() directly. This ensures that we
	13	* don't trigger races between getenv() invoked by lttng-ust listener threads
	14	* invoked concurrently with setenv() called by an otherwise single-threaded
	15	* application thread. (the application is not aware that it runs with
	16	* lttng-ust)
	17	*/
	18
	19	char lttng_ust_getenv(const char name)
	20	__attribute__((visibility("hidden")));
	21
	22
	23	/*
	24	* Initialize the internal filtered list of environment variables.
	25	*/
	26	void lttng_ust_getenv_init(void)
	27	__attribute__((visibility("hidden")));
	28
	29	#endif /* _UST_COMMON_GETENV_H */