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From: Pekka Niiranen <pekka DOT niiranen AT wlanmail DOT com>
Subject:  Re: SOLUTION: Strange behaviour with output redirection (MORE information,  Bug in awk.exe?)
Date:  Thu, 12 May 2005 18:42:09 +0300
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Message-ID: <d5vt1u$9he$1@sea.gmane.org>
References:  <d5flgq$rk8$2 AT sea DOT gmane DOT org> <d5ktvq$194$1 AT sea DOT gmane DOT org>
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Pekka Niiranen wrote:

Got it!

I had 7 following lines

ord1=`expr 300`
echo  "Base ordinal is ${ord1}"
ord=`expr ${ord1} + 5`    #subsequent module interval counter
prev=`expr 0`
ctr=`expr 1`
count=`expr 0`
disp_nb=`expr 264`

BEFORE the awk call

${FAWK}/"Number_of_Loops/{print \$3}" subst$1 >${TMPDIR}/$$
[ -s ${TMPDIR}/$$ ] && < ${TMPDIR}/$$ read count

Commenting out ANY one of those 7 lines fixed the problem.
It seems I was running out of some resources
but cannot explain what is it.

Is "$((  ))" for arithmetic safer? Anyone?

-pekka-


> Hi again,
> 
> I managed to isolate the problem to the awk.exe.
> Calling like this:
> 
> export FAWK; FAWK="awk -F^ --compat --source="
> ${FAWK}/"SIMU_included/{print \$3}" subst$1 >${TMPDIR}/$$
> [ -s ${TMPDIR}/$$ ] && < ${TMPDIR}/$$ read SIMU
> 
> works only occassionally. But calling awk without redirection
> first works 100% of the time.
> 
> export FAWK; FAWK="awk -F^ --compat --source="
> ${FAWK}/"SIMU_included/{print \$3}" subst$1
> ${FAWK}/"SIMU_included/{print \$3}" subst$1 >${TMPDIR}/$$
> [ -s ${TMPDIR}/$$ ] && < ${TMPDIR}/$$ read SIMU
> 
> What is happening here? I am using the 1.5.16-1 version of Cygwin.
> 
> -pekka-
> 
> Pekka Niiranen wrote:
> 
>> Hi there,
>>
>> I am using the following convention to set variables in Bash:
>>
>> awk -f /"SIMU_included/{print \$3}" subst$1 >${TMPDIR}/$$
>> [ -s ${TMPDIR}/$$ ] && < ${TMPDIR}/$$ read SIMU
>>
>> For some reason parameter "SIMU" gets set randomly.
>> Could this be due W2K's buffering in creation of
>> temporary file ${TMPDIR}/$$? i.e read happens before file
>> is written on disk?
>>
>> For some reason setting "ntsec" seems to help but this does not
>> explain the random success of file reading.
>>
>> -pekka-
>>
>>
> 
> 


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