Bug 162765 - [patch] lseek(2) may return successful although no seek operation was actually performed
Summary: [patch] lseek(2) may return successful although no seek operation was actuall...
Status: Open
Alias: None
Product: Documentation
Classification: Unclassified
Component: Manual Pages (show other bugs)
Version: Latest
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-bugs mailing list
Keywords: patch
Depends on:
Reported: 2011-11-22 20:40 UTC by Alexander Best
Modified: 2018-08-05 06:48 UTC (History)
1 user (show)

See Also:

file.diff (1.85 KB, patch)
2011-11-22 20:40 UTC, Alexander Best
no flags Details | Diff
lseek.2.diff3 (1.85 KB, text/plain; charset=us-ascii)
2011-11-22 21:52 UTC, Alexander Best
no flags Details

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Description Alexander Best freebsd_committer 2011-11-22 20:40:01 UTC
in certain situations lseek() will return successful although no seek was performed. this can happen when operating on devices that don't support seeking (older tape drives) or when operating on changeable media devices (such as DVD or Blu-ray devices) without a medium inserted.

the attached patch fixes the lseek(2) man page by adding several entries to the BUGS section, along with updating the POSIX compliance to the latest specifications.

please note that the real issue doesn't seem fixable atm. lseek() was never designed to confirm a seek operation, but to merely request it.

the issue was extensively discussion in this thread:

http://lists.freebsd.org/pipermail/freebsd-hackers/2011-November/036842.html (alternative link: http://docs.freebsd.org/cgi/mid.cgi?20111115202450.GA73512)


Fix: Patch attached with submission follows:
Comment 1 Alexander Best freebsd_committer 2011-11-22 20:45:29 UTC
Responsible Changed
From-To: freebsd-bugs->freebsd-doc

Over to maintainer(s).
Comment 2 Alexander Best freebsd_committer 2011-11-22 21:52:56 UTC
here's a revised patch (comma removed after "confirm"), as suggested by warren
block. thanks. :)

Comment 3 Eitan Adler freebsd_committer freebsd_triage 2012-03-04 04:31:47 UTC
Responsible Changed
From-To: freebsd-doc->eadler

I'll take it.
Comment 4 Eitan Adler freebsd_committer freebsd_triage 2012-09-02 17:52:36 UTC
Responsible Changed
From-To: eadler->freebsd-doc

I won't be looking at this PR for a while and I need to clear some out 
of my queue
Comment 5 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 08:00:50 UTC
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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