Re: SOLUTION: Strange behaviour with output redirection (MORE information, Bug in awk.exe?)

[Pekka Niiranen <pekka dot niiranen at wlanmail dot com>]

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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