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[gnulib.git] / lib / safe-write.c

diff --git a/lib/safe-write.c b/lib/safe-write.c
index 5596203..fed363c 100644 (file)
--- a/lib/safe-write.c
+++ b/lib/safe-write.c
@@ -1,10 +1,10 @@
-/* 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, 2009-2013 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
@@ -12,72 +12,7 @@
    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"