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-rw-r--r--libdiskfs/rdwr-internal.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/libdiskfs/rdwr-internal.c b/libdiskfs/rdwr-internal.c
index 790fc12e..18a4ae1e 100644
--- a/libdiskfs/rdwr-internal.c
+++ b/libdiskfs/rdwr-internal.c
@@ -1,5 +1,5 @@
/*
- Copyright (C) 1994, 1995, 1996, 1997, 1999 Free Software Foundation
+ Copyright (C) 1994,95,96,97,99,2000 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
@@ -41,6 +41,10 @@ _diskfs_rdwr_internal (struct node *np,
if (dir)
assert (!diskfs_readonly);
+ if (*amt == 0)
+ /* Zero-length writes do not update mtime or anything else, by POSIX. */
+ return 0;
+
if (!diskfs_check_readonly () && !notime)
{
if (dir)