diff options
| author | Roland McGrath <roland@gnu.org> | 2000-01-24 07:08:58 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2000-01-24 07:08:58 +0000 |
| commit | 97e8a8a72dcc1146b3ef3db4b2438eb11fab915c (patch) | |
| tree | 14b3d62dcff71874fbe27b059c374c0d65423cfb | |
| parent | b14110af8c96c5b021c1e27209608b032db7586e (diff) | |
2000-01-24 Roland McGrath <roland@baalperazim.frob.com>
* rdwr-internal.c (_diskfs_rdwr_internal): Short-circuit return for
zero-length transfer to avoid side effects, as POSIX requires.
| -rw-r--r-- | libdiskfs/rdwr-internal.c | 6 |
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) |