-/* An interface to write() that retries after interrupts.
- Copyright (C) 1993, 1994, 1998, 2002 Free Software Foundation, Inc.
+/* An interface to write that retries after interrupts.
+ Copyright (C) 2002, 2009-2010 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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
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, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-/* Specification. */
-#include "safe-write.h"
-
-/* Get ssize_t. */
-#include <sys/types.h>
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#include <errno.h>
-#ifndef errno
-extern int errno;
-#endif
-
-#include <limits.h>
-
-/* We don't pass an nbytes count > SSIZE_MAX to write() - POSIX says the
- effect would be implementation-defined. Also we don't pass an nbytes
- count > INT_MAX but <= SSIZE_MAX to write() - this triggers a bug in
- Tru64 5.1. */
-#define MAX_BYTES_TO_READ INT_MAX
-
-/* Write up to COUNT bytes at BUF to descriptor FD, retrying if interrupted.
- Return the actual number of bytes written, zero for EOF, or (size_t) -1
- for an error. */
-size_t
-safe_write (int fd, const void *buf, size_t count)
-{
- size_t total_written = 0;
-
- if (count > 0)
- {
- const char *ptr = (const char *) buf;
- do
- {
- size_t nbytes_to_write = count;
- ssize_t result;
-
- /* Limit the number of bytes to write in one round, to avoid running
- into unspecified behaviour. But keep the file pointer block
- aligned when doing so. */
- if (nbytes_to_write > MAX_BYTES_TO_READ)
- nbytes_to_write = MAX_BYTES_TO_READ & ~8191;
-
- result = write (fd, ptr, nbytes_to_write);
- if (result < 0)
- {
-#ifdef EINTR
- if (errno == EINTR)
- continue;
-#endif
- return result;
- }
- total_written += result;
- ptr += result;
- count -= result;
- }
- while (count > 0);
- }
-
- return total_written;
-}
+#define SAFE_WRITE
+#include "safe-read.c"