[lttng-tools.git] / src / common / readwrite.h

#ifndef LTTNG_COMMON_READWRITE_H
#define LTTNG_COMMON_READWRITE_H

/*
 * Copyright (C) 2013 - 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, version 2.1 only,
 * as published by the Free Software Foundation.
 *
 * 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 <unistd.h>

/*
 * lttng_read and lttng_write take care of EINTR and partial read/write.
 * Upon success, they return the "count" received as parameter.
 * They can return a negative value if an error occurs.
 * If a value lower than the requested "count" is returned, it means an
 * error occured.
 * The error can be checked by querying errno.
 */
ssize_t lttng_read(int fd, void *buf, size_t count);
ssize_t lttng_write(int fd, const void *buf, size_t count);

#endif /* LTTNG_COMMON_READWRITE_H */
Commit	Line	Data
	1	#ifndef LTTNG_COMMON_READWRITE_H
	2	#define LTTNG_COMMON_READWRITE_H
	3
	4	/*
	5	* Copyright (C) 2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	*
	7	* This library is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU Lesser General Public License, version 2.1 only,
	9	* as published by the Free Software Foundation.
	10	*
	11	* This library is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
	14	* for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public License
	17	* along with this library; if not, write to the Free Software Foundation,
	18	* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include <unistd.h>
	22
	23	/*
	24	* lttng_read and lttng_write take care of EINTR and partial read/write.
	25	* Upon success, they return the "count" received as parameter.
	26	* They can return a negative value if an error occurs.
	27	* If a value lower than the requested "count" is returned, it means an
	28	* error occured.
	29	* The error can be checked by querying errno.
	30	*/
	31	ssize_t lttng_read(int fd, void *buf, size_t count);
	32	ssize_t lttng_write(int fd, const void *buf, size_t count);
	33
	34	#endif /* LTTNG_COMMON_READWRITE_H */