lib/safe-read.h

   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.  */
  25 extern size_t safe_read (int fd, void *buf, size_t count);