.

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

diff --git a/lib/full-write.c b/lib/full-write.c
index 3fca56b..1feb2f7 100644 (file)
--- a/lib/full-write.c
+++ b/lib/full-write.c
@@ -1,5 +1,5 @@
-/* safe-write.c -- an interface to write that retries after interrupts
-   Copyright (C) 1993 Free Software Foundation, Inc.
+/* full-write.c -- an interface to write that retries after interrupts
+   Copyright (C) 1993, 1994, 1997, 1998, 2000 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
@@ -12,46 +12,44 @@
    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
    Copied largely from GNU C's cccp.c.
    */
 
-#ifdef HAVE_CONFIG_H
-#if defined (CONFIG_BROKETS)
-/* We use <config.h> instead of "config.h" so that a compilation
-   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
-   (which it would do because it found this file in $srcdir).  */
-#include <config.h>
-#else
-#include "config.h"
-#endif
+#if HAVE_CONFIG_H
+# include <config.h>
 #endif
 
 #include <sys/types.h>
 
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
 #endif
 
 #include <errno.h>
-#ifndef STDC_HEADERS
+#ifndef errno
 extern int errno;
 #endif
 
 /* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted.
-   Return zero upon success, write's (negative) error code otherwise.  */
+   Return LEN upon success, write's (negative) error code otherwise.  */
 
 int
-safe_write (desc, ptr, len)
-     int desc;
-     char *ptr;
-     int len;
+full_write (int desc, const char *ptr, size_t len)
 {
+  int total_written;
+
+  total_written = 0;
   while (len > 0)
     {
       int written = write (desc, ptr, len);
+      /* write on an old Slackware Linux 1.2.13 returns zero when
+        I try to write more data than there is room on a floppy disk.
+        This puts dd into an infinite loop.  Reproduce with
+        dd if=/dev/zero of=/dev/fd0.  If you have this problem,
+        consider upgrading to a newer kernel.  */
       if (written < 0)
        {
 #ifdef EINTR
@@ -60,8 +58,9 @@ safe_write (desc, ptr, len)
 #endif
          return written;
        }
+      total_written += written;
       ptr += written;
       len -= written;
     }
-  return 0;
+  return total_written;
 }