1/* An interface to read() that retries after interrupts. 2 Copyright (C) 2002, 2006 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 3 of the License, or 7 (at your option) 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, see <http://www.gnu.org/licenses/>. */ 16 17#include <stddef.h> 18 19#ifdef __cplusplus 20extern "C" { 21#endif 22 23 24#define SAFE_READ_ERROR ((size_t) -1) 25 26/* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted. 27 Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR 28 upon error. */ 29extern size_t safe_read (int fd, void *buf, size_t count); 30 31 32#ifdef __cplusplus 33} 34#endif 35