1 /* @(#)ffileread.c 1.13 09/06/30 Copyright 1986, 1996-2009 J. Schilling */
2 /*
3 * Copyright (c) 1986, 1996-2009 J. Schilling
4 */
5 /*
6 * The contents of this file are subject to the terms of the
7 * Common Development and Distribution License, Version 1.0 only
8 * (the "License"). You may not use this file except in compliance
9 * with the License.
10 *
11 * See the file CDDL.Schily.txt in this distribution for details.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file CDDL.Schily.txt from this distribution.
15 */
16
17 #include "schilyio.h"
18
19 EXPORT ssize_t
ffileread(f,buf,len)20 ffileread(f, buf, len)
21 register FILE *f;
22 void *buf;
23 size_t len;
24 {
25 register int fd;
26 register ssize_t ret;
27 int oerrno = geterrno();
28
29 down2(f, _IOREAD, _IORW);
30 fd = fileno(f);
31
32 while ((ret = read(fd, buf, len)) < 0 && geterrno() == EINTR) {
33 /*
34 * Set back old 'errno' so we don't change the errno visible
35 * to the outside if we did not fail.
36 */
37 seterrno(oerrno);
38 }
39 return (ret);
40 }
41