Groups > comp.os.linux.development.system > #108

Re: per process llseek offset

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From	Rainer Weikusat <rweikusat@mssgmbh.com>
Newsgroups	comp.os.linux.development.system
Subject	Re: per process llseek offset
Date	Mon, 02 May 2011 13:07:47 +0100
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"dr.oktopus" <blindwilly@freeonline.zzn.com> writes:
> as you know offset in the file structure is shared amongst father and
> child processes. How can I get a per-process specific offset so that
> a child lseek is not influenced by the same operation done by the
> father process?

Assuming that your inherited file descriptor is stored in a variable
named fd (and the type of file it refers to supports this), opening
the file /proc/self/<fd> (eg /proc/self/3 if fd == 3) results in a
file descriptor referring to the same file but with a newly create
file structure.

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per process llseek offset "dr.oktopus" <blindwilly@freeonline.zzn.com> - 2011-05-01 22:41 -0700
  Re: per process llseek offset David Schwartz <davids@webmaster.com> - 2011-05-02 03:50 -0700
    Re: per process llseek offset "dr.oktopus" <blindwilly@freeonline.zzn.com> - 2011-05-02 15:39 -0700
      Re: per process llseek offset Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-05-02 20:25 -0600
  Re: per process llseek offset Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-05-02 13:07 +0100

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