From: schaefer@z-code.ncd.com (Barton E. Schaefer)
To: zsh-workers@math.gatech.edu
Subject: Re: History file locking?
Date: Wed, 10 Apr 1996 14:41:22 -0700 [thread overview]
Message-ID: <960410144122.ZM17336@zyrcon.z-code.com> (raw)
In-Reply-To: Zoltan Hidvegi <hzoli@cs.elte.hu> "Re: History file locking?" (Apr 10, 11:21pm)
On Apr 10, 11:21pm, Zoltan Hidvegi wrote:
} Subject: Re: History file locking?
}
} If the link fails, check the validity of the lock (the lock file should
} contain the PID of the locking process) using kill(0, lock_pid). If the
} lock is invalid, remove it and repeat step 2.
That doesn't work when the competing processes are on two different
machines. You can only reliably remove lock files by timing them out
based on the date of the file. A process that wants to hang onto a
lock has to touch the lock file periodically to keep its date current.
--
Bart Schaefer Vice President, Technology, Z-Code Software
schaefer@z-code.com Division of NCD Software Corporation
http://www.well.com/www/barts
next prev parent reply other threads:[~1996-04-10 21:46 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-03-12 19:03 Buffered stderr on Linux Zoltan Hidvegi
1996-03-12 19:24 ` Bart Schaefer
1996-03-12 20:26 ` Zoltan Hidvegi
1996-03-12 23:17 ` Zoltan Hidvegi
1996-03-13 0:16 ` Steven L Baur
[not found] ` <hzoli@cs.elte.hu>
1996-03-16 18:46 ` Bart Schaefer
1996-04-10 21:41 ` Barton E. Schaefer [this message]
1996-04-10 22:16 ` History file locking? Daniel Dignam
1996-06-26 13:51 ` Use of qualifiers without glob pattern? Bart Schaefer
1996-06-26 14:01 ` Regression tests Bas V. de Bakker
1996-06-26 14:52 ` Use of qualifiers without glob pattern? Zoltan Hidvegi
1996-06-26 15:54 ` Bart Schaefer
1996-06-27 1:03 ` Zoltan Hidvegi
1996-10-31 16:55 ` Parameter expansion bug? Bart Schaefer
1996-10-31 16:57 ` Hrvoje Niksic
1996-10-31 17:04 ` Zoltan Hidvegi
1996-10-31 17:47 ` Bart Schaefer
1996-12-13 3:37 ` fifo configure check Bart Schaefer
1996-12-13 8:58 ` fifo configure check (seems to work here: Solaris 2.4) C. v. Stuckrad
1996-12-13 14:44 ` fifo configure check Zefram
1996-12-13 17:33 ` Zoltan Hidvegi
[not found] ` <wayne@clari.net>
1997-01-31 22:01 ` history-search-backward Bart Schaefer
1996-04-10 10:31 History file locking? Russell Senior
1996-04-10 12:12 ` Zefram
1996-04-10 12:41 ` Zoltan Hidvegi
1996-04-10 12:50 ` Zefram
[not found] ` <A.Main@dcs.warwick.ac.uk>
1996-04-10 16:26 ` Barton E. Schaefer
1996-04-10 17:08 ` Anthony Heading
[not found] ` <aheading@jpmorgan.com>
1996-04-10 17:12 ` Barton E. Schaefer
1996-04-10 18:03 ` Anthony Heading
1996-06-05 21:25 ` Builtin append() and prepend() to PATH, CDPATH, etc Bart Schaefer
[not found] ` <schaefer@candle.brasslantern.com>
1996-06-10 19:22 ` Clinton Bunch
1996-06-10 19:54 ` Bart Schaefer
1996-06-10 20:24 ` Hrvoje Niksic
1996-06-10 20:58 ` Clinton Bunch
1996-06-24 18:26 ` BUG: useheap in doexpandhist() Barton E. Schaefer
1996-06-24 19:11 ` Zoltan Hidvegi
1996-06-24 21:20 ` Barton E. Schaefer
1996-06-25 0:01 ` Zoltan Hidvegi
1996-06-25 0:22 ` Barton E. Schaefer
1996-07-23 20:01 ` Bug in case stmt with '(' Morris M. Siegel
1996-07-23 21:55 ` Bart Schaefer
1996-07-24 8:29 ` Zefram
1996-07-24 9:52 ` Peter Stephenson
1996-07-24 11:10 ` Bart Schaefer
1996-07-24 14:16 ` Zoltan Hidvegi
1996-04-10 21:21 ` History file locking? Zoltan Hidvegi
1996-06-02 17:59 Builtin append() and prepend() to PATH, CDPATH, etc Fung-Chai Lim
1996-06-02 21:26 ` Zoltan Hidvegi
[not found] ` <1062.199606041027@stone.dcs.warwick.ac.uk>
1996-06-22 20:12 BUG: useheap in doexpandhist() Bart Schaefer
[not found] <17651.199607222123@stone.dcs.warwick.ac.uk>
1996-07-23 14:08 ` Bug in case stmt with '(' Zoltan Hidvegi
1996-07-23 16:25 ` Bart Schaefer
1996-10-31 14:41 Parameter expansion bug? Anthony Heading
1996-10-31 15:13 ` Hrvoje Niksic
1996-10-31 16:12 ` Zoltan Hidvegi
1996-10-31 20:49 ` Anthony Heading
1996-12-13 2:30 fifo configure check Zoltan Hidvegi
1997-01-31 10:47 history-search-backward Peter Stephenson
1997-01-31 12:16 ` history-search-backward Zefram
1997-01-31 12:42 ` history-search-backward Peter Stephenson
1997-01-31 15:02 ` history-search-backward Bart Schaefer
1997-01-31 15:23 ` history-search-backward Vinnie Shelton
1997-01-31 19:02 ` history-search-backward Zoltan Hidvegi
1997-01-31 19:13 ` history-search-backward Wayne Davison
2001-04-27 19:54 comptest* failed to load module: zsh/termcap Peter Whaite
2001-04-28 6:10 ` Bart Schaefer
2001-04-28 8:55 ` Andrej Borsenkow
2001-04-30 15:44 ` Peter Whaite
2001-04-30 16:30 ` Bart Schaefer
2001-04-30 16:47 ` Andrej Borsenkow
2001-04-30 17:16 ` PATCH: " Bart Schaefer
2001-04-30 18:54 ` Peter Whaite
2001-04-30 19:12 ` Bart Schaefer
2001-04-30 15:32 ` Peter Whaite
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