On 8/01/2010 8:47 AM, Bernard T. Higonnet wrote:
echo starting in `pwd`
for hoo in *
do
echo $hoo
if [ -d "$hoo" ]
then echo pushing $hoo; cd $hoo
$0
else echo processing $hoo
fi;
echo going to next item
done
cd ..
I have tried various minor variations , all to no avail.
I have no doubt I'm doing something very dumb, but I'm too locked into
my vision to see it...
All help appreciated
Bernard Higonnet
I am probably the last person you'd want debugging your scripts, but I
can at least reproduce the problem.
My test folder and file structure:
/tmp/test
dir0
dir00
file00
file0
dir1
dir11
file11
file1
Luckily, I think I have also derived the solution. The problem appears
to be the directory stack. Specifically, the output of my revised
version shows that it's not working in the right folders all the time.
#! /bin/sh
echo Starting in `pwd`
for hoo in *; do
echo $hoo
if [ -d "$hoo" ]; then
echo Pushing $hoo; cd $hoo
($0)
else
echo Processing file $hoo
fi
echo Going to next item
done
cd ..
echo Finishing in `pwd`
By moving the cd command into the if statement, we change back into the
correct folder at the right time (otherwise the siblings to the first
directory cannot be found in the for loop, perhaps because the current
directory has changed mid-execution):
test01# cat /root/recurse.sh
#! /bin/sh
echo Starting in `pwd`
for hoo in *; do
echo Found item $hoo
if [ -d "$hoo" ]; then
echo Pushing $hoo
cd $hoo
$0
cd ..
else
echo Processing file $hoo
fi
echo Going to next item
done
echo Finishing in `pwd`
test01#
I think it works - someone brighter than me can tell us both why :).
Most of the changes you see there are stylistic (eg the placement of
then/else and do/done) or were for my own clarity in figuring out what
was being printed where.
Dave.
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