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 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 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23 
  24 
  25 #define SAFE_READ_ERROR ((size_t) -1)
  26 
  27 /* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted.
  28    Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR
  29    upon error.  */
  30 extern size_t safe_read (int fd, void *buf, size_t count);
  31 
  32 
  33 #ifdef __cplusplus
  34 }
  35 #endif