+
−/* An interface to write() that retries after interrupts.
+
−   Copyright (C) 2002, 2009-2013 Free Software Foundation, Inc.
+
−
+
−   This program is free software: you can redistribute it and/or modify
+
−   it under the terms of the GNU General Public License as published by
+
−   the Free Software Foundation; either version 3 of the License, or
+
−   (at your option) any later version.
+
−
+
−   This program is distributed in the hope that it will be useful,
+
−   but WITHOUT ANY WARRANTY; without even the implied warranty of
+
−   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+
−   GNU General Public License for more details.
+
−
+
−   You should have received a copy of the GNU General Public License
+
−   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
−
+
−/* Some system calls may be interrupted and fail with errno = EINTR in the
+
−   following situations:
+
−     - The process is stopped and restarted (signal SIGSTOP and SIGCONT, user
+
−       types Ctrl-Z) on some platforms: Mac OS X.
+
−     - The process receives a signal for which a signal handler was installed
+
−       with sigaction() with an sa_flags field that does not contain
+
−       SA_RESTART.
+
−     - The process receives a signal for which a signal handler was installed
+
−       with signal() and for which no call to siginterrupt(sig,0) was done,
+
−       on some platforms: AIX, HP-UX, IRIX, OSF/1, Solaris.
+
−
+
−   This module provides a wrapper around write() that handles EINTR.  */
+
−
+
−#include <stddef.h>
+
−
+
−#define SAFE_WRITE_ERROR ((size_t) -1)
+
−
+
−/* Write up to COUNT bytes at BUF to descriptor FD, retrying if interrupted.
+
−   Return the actual number of bytes written, zero for EOF, or SAFE_WRITE_ERROR
+
−   upon error.  */
+
−extern size_t safe_write (int fd, const void *buf, size_t count);