1 /* @(#)niwrite.c	1.7 09/06/30 Copyright 1986, 2001-2009 J. Schilling */
2 /*
3  *	Non interruptable write
4  *
5  *	Copyright (c) 1986, 2001-2009 J. Schilling
6  */
7 /*
8  * The contents of this file are subject to the terms of the
9  * Common Development and Distribution License, Version 1.0 only
10  * (the "License").  You may not use this file except in compliance
11  * with the License.
12  *
13  * See the file CDDL.Schily.txt in this distribution for details.
14  *
15  * When distributing Covered Code, include this CDDL HEADER in each
16  * file and include the License file CDDL.Schily.txt from this distribution.
17  */
18 
19 #include "schilyio.h"
20 
21 EXPORT ssize_t
22 _niwrite(f, buf, count)
23 	int	f;
24 	void	*buf;
25 	size_t	count;
26 {
27 	ssize_t	ret;
28 	int	oerrno = geterrno();
29 
30 	if ((ret = (ssize_t)count) < 0) {
31 		seterrno(EINVAL);
32 		return ((ssize_t)-1);
33 	}
34 	while ((ret = write(f, buf, count)) < 0 && geterrno() == EINTR) {
35 		/*
36 		 * Set back old 'errno' so we don't change the errno visible
37 		 * to the outside if we did not fail.
38 		 */
39 		seterrno(oerrno);
40 	}
41 	return (ret);
42 }
43