X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fsafe-read.h;h=9f8a59bd4f2dac08025fe9ceeffbafa1d55407f6;hb=ed664fa4ea5bdee8952dbcdf614b87303b8f67a1;hp=3734671de1e8974552cb21887b9b9010cfe6091d;hpb=84acb508aa24433c9e4fa17c1038ed6cac613fba;p=gnulib.git

diff --git a/lib/safe-read.h b/lib/safe-read.h
index 3734671de..9f8a59bd4 100644
--- a/lib/safe-read.h
+++ b/lib/safe-read.h
@@ -1,2 +1,25 @@
-ssize_t
-safe_read (int desc, char *ptr, size_t len);
+/* An interface to read() 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#include <stddef.h>
+
+#define SAFE_READ_ERROR ((size_t) -1)
+
+/* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted.
+   Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR
+   upon error.  */
+extern size_t safe_read (int fd, void *buf, size_t count);