1/* An interface to read() that retries after interrupts.
2   Copyright (C) 2002 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2, or (at your option)
7   any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software Foundation,
16   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
17
18#include <stddef.h>
19
20#define SAFE_READ_ERROR ((size_t) -1)
21
22/* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted.
23   Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR
24   upon error.  */
25extern size_t safe_read (int fd, void *buf, size_t count);
26