csh script hangs only on cygwin
Peter Rehley
peter@rehley.net
Sat Jan 28 18:16:00 GMT 2006
On Jan 27, 2006, at 10:55 AM, Stewart Midwinter wrote:
> I've been able to isolate a problem with csh on cygwin running on
> Windows Server 2003 on a Xeon. The following script hangs after a
> certain period of time ranging from a few minutes to a few hours.
>
> ---------------
> #!/bin/csh
>
> while (1)
> set year = `date +%y`
> set month = `date +%m`
> set day = `date +%d`
> set hour = `date +%H`
> set minute = `date +%M`
> set second = `date +%S`
> set stamp = "$year$month$day $hour : $minute : $second"
> echo $stamp
> sleep 2
> end
> ------------
>
> The equivalent script in bash doesn't hang even after a day or more.
>
> -------------
> #!/bin/bash
>
> while [ 1 ]; do
> echo $(date +%Y%m%d.%H%M%S)
> sleep 2
> done
> -------------
This isn't the equivalent script. It's similar and the output is the
same, but you only call date once here, while in the other you call
it 6 times. Maybe that is way it seems to work for bash and not csh.
>
> Has anyone else had problems with csh scripts on cygwin? Yes, I know
> that some people don't recommend using csh (see "Csh programming
> considered harmful",
> http://www.faqs.org/faqs/unix-faq/shell/csh-whynot/), but I'm stuck
> with a whole lot of csh scripts and don't have time to port them all
> at the moment.
I have problems with bash/sh script hanging, but I haven't tried csh.
http://cygwin.com/ml/cygwin/2006-01/msg00549.html
Which I'm getting in 1.5.19-4 too, but I haven't tried the latest
snapshot. Which reminds me. Could you read http://cygwin.com/
problems.html and provide the information that it says to provide?
Also were in the script does it hang. It you type ps -ef what do you
see. What information does the /proc directory tell you. Can you
ctrl-c out of the script?
Basically, provide as much information as possible.
Peter
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