[lttng-ust.git] / snprintf / fflush.c

/*	$OpenBSD: fflush.c,v 1.7 2009/10/22 01:23:16 guenther Exp $ */
/*
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (C) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 */

#include <errno.h>
#include <stdio.h>
#include "local.h"

/* Flush a single file, or (if fp is NULL) all files.  */
int ust_safe_fflush(LTTNG_UST_LFILE *fp)
{

	if (fp == NULL)
		return 0;
//		return (_fwalk(__sflush));
	if ((fp->_flags & (__SWR | __SRW)) == 0) {
		errno = EBADF;
		return (EOF);
	}
	return (__sflush(fp));
}

int
__sflush(LTTNG_UST_LFILE *fp)
{
	unsigned char *p;
	int n, t;

	t = fp->_flags;
	if ((t & __SWR) == 0)
		return (0);

	if ((p = fp->_bf._base) == NULL)
		return (0);

	n = fp->_p - p;		/* write this much */

	/*
	 * Set these immediately to avoid problems with longjmp and to allow
	 * exchange buffering (via setvbuf) in user write function.
	 */
	fp->_p = p;
	fp->_w = t & (__SLBF|__SNBF) ? 0 : fp->_bf._size;

	for (; n > 0; n -= t, p += t) {
		t = (*fp->_write)(fp->_cookie, (char *)p, n);
		if (t <= 0) {
			fp->_flags |= __SERR;
			return (EOF);
		}
	}
	return (0);
}
Commit	Line	Data
bf0d695d	1	/* $OpenBSD: fflush.c,v 1.7 2009/10/22 01:23:16 guenther Exp $ */
c0c0989a MJ	2	/*
	3	* SPDX-License-Identifier: BSD-3-Clause
	4	*
	5	* Copyright (C) 1990, 1993
bf0d695d PMF	6	* The Regents of the University of California. All rights reserved.
	7	*
	8	* This code is derived from software contributed to Berkeley by
	9	* Chris Torek.
bf0d695d PMF	10	*/
	11
	12	#include <errno.h>
	13	#include <stdio.h>
	14	#include "local.h"
	15
	16	/* Flush a single file, or (if fp is NULL) all files. */
002e1fde	17	int ust_safe_fflush(LTTNG_UST_LFILE *fp)
bf0d695d PMF	18	{
	19
	20	if (fp == NULL)
	21	return 0;
	22	// return (_fwalk(__sflush));
	23	if ((fp->_flags & (__SWR \| __SRW)) == 0) {
	24	errno = EBADF;
	25	return (EOF);
	26	}
	27	return (__sflush(fp));
	28	}
	29
	30	int
002e1fde	31	__sflush(LTTNG_UST_LFILE *fp)
bf0d695d PMF	32	{
	33	unsigned char *p;
	34	int n, t;
	35
	36	t = fp->_flags;
	37	if ((t & __SWR) == 0)
	38	return (0);
	39
	40	if ((p = fp->_bf._base) == NULL)
	41	return (0);
	42
	43	n = fp->_p - p; /* write this much */
	44
	45	/*
	46	* Set these immediately to avoid problems with longjmp and to allow
	47	* exchange buffering (via setvbuf) in user write function.
	48	*/
	49	fp->_p = p;
	50	fp->_w = t & (__SLBF\|__SNBF) ? 0 : fp->_bf._size;
	51
	52	for (; n > 0; n -= t, p += t) {
	53	t = (fp->_write)(fp->_cookie, (char )p, n);
	54	if (t <= 0) {
	55	fp->_flags \|= __SERR;
	56	return (EOF);
	57	}
	58	}
	59	return (0);
	60	}