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From: mathog <mathog@caltech.edu> To: cygwin-xfree@cygwin.com Subject: Re: startxwin.exe no longer exists? Date: Wed, 17 Dec 2014 17:52:00 -0000 [thread overview] Message-ID: <f0cd88b0d4227baff5793410155de6d1@saf.bio.caltech.edu> (raw) In-Reply-To: <CACoZoo2_86n2hQ4S8ud-SUMY83p_s1kko5FJgCy6AD8q2rXboA@mail.gmail.com> On 17-Dec-2014 09:40, Erik Soderquist wrote: > <snip> >> There is no reason that should happen unless the startxwin script also >> crashes - and that basically should never happen. The script should >> clean >> up any mess that the binary might leave, and it should handle all >> conditions >> that might result from some process it has started crashing. That is, >> in >> the script (pseudocode): >> >> # If there is an existing lock file: >> # Test is there also an existing X11 binary process? >> # yes - abort with message: X11 server already running >> # no - remove lock file >> ########## >> # do whatever housekeeping is needed >> # then start binary >> /path/X11_server_binary $args >> #no matter how binary exits... >> rm /path/.X*lock >> >> The only time a script might not have a chance to run the last command >> is if >> it starts the server via "nohup binary &", assuming such a thing is >> even >> possible in cygwin, and then exits without waiting around for the >> binary to >> exit. Or, of course, if the whole system crashes, but that isn't the >> issue >> the end users are having. > > So you want your script to completely mask and/or destroy any evidence > that something crashed?? No, that is the log file, this is the lock file. It should rotate the log file from the previous run and delete the lock file. > > Also, as the X server is not bound to a tty, it forks to the > background on its own anyway, so your pseudocode example would delete > the lock file just after the X server started. In that case the the script needs to retrieve the PID of the forked process and wait for it to exit. Regards, David Mathog mathog@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
next prev parent reply other threads:[~2014-12-17 17:52 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-12-13 16:20 Will Parsons 2014-12-13 18:17 ` Marco Atzeri 2014-12-16 2:50 ` Will Parsons 2014-12-16 2:56 ` Larry Hall (Cygwin-X) 2014-12-16 3:30 ` Will Parsons 2014-12-16 3:35 ` Larry Hall (Cygwin-X) 2014-12-16 14:29 ` Mark Hansen 2014-12-16 16:00 ` Erik Soderquist 2014-12-16 16:36 ` rcunningham 2014-12-16 17:06 ` Erik Soderquist 2014-12-16 17:23 ` rcunningham 2014-12-16 22:58 ` Will Parsons 2014-12-16 23:39 ` Erik Soderquist 2014-12-17 17:29 ` mathog 2014-12-17 17:40 ` Erik Soderquist 2014-12-17 17:52 ` mathog [this message] 2014-12-17 18:36 ` Erik Soderquist 2014-12-17 19:02 ` mathog
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