lkml.org 
[lkml]   [2002]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Redundant syscalls?
---------  Received message begins Here  ---------

>
>
> I was wondering why do we need fsetxattr(2), fgetxattr(2) etc when we
> already have setxattr(2), getxattr(2) etc working on file names
> instead of file descriptors.
> truncate(2)/ftruncate(2) is another more traditional example.

Atomic actions.

Consider the case of a file that doesn't exist yet. first you
open it, then perform the fsetxattr. If you use the name, then it becomes
possible to rename the file and substitute a different one before the
setxattr. Now, the open file will be missing the attribute(s).
-------------------------------------------------------------------------
Jesse I Pollard, II
Email: pollard@navo.hpc.mil

Any opinions expressed are solely my own.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:24    [W:0.033 / U:20.760 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site