gl/safe-read.h

   1 /* An interface to read() that retries after interrupts.
   2    Copyright (C) 2002, 2006, 2009-2010 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
  20 extern "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.  */
  29 extern size_t safe_read (int fd, void *buf, size_t count);
  30
  31
  32 #ifdef __cplusplus
  33 }
  34 #endif