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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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. */ 25 extern size_t safe_read (int fd, void *buf, size_t count); 26