Orthogonal approach to read()/write() that handles EINTR and counts > 2^31

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

diff --git a/lib/safe-write.h b/lib/safe-write.h
new file mode 100644 (file)
index 0000000..25d1a4d
--- /dev/null
+++ b/lib/safe-write.h
@@ -0,0 +1,23 @@
+/* An interface to write() that retries after interrupts.
+   Copyright (C) 2002 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 2, 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, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include <stddef.h>
+
+/* 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.  */
+extern size_t safe_write (int fd, const void *buf, size_t count);