Le 13/12/2011 08:50, Henk Langeveld a écrit :
David Korn:
Since you are dotting script-b, shouldn't SHLVL remain the same.
If you instead run
./script-b
instead, then the level should be one higher.
Correct. But I wanted something that would work at any level.
My conclusion is that I need to know the name of the script
as it is being called and trigger on that. This allows me
to put all of my code in functions and include one statement
at the bottom:
case $0 in
(*/$myname) do_stuff $@
esac
Compare this with python:
if __name__ == '__main__':
actually_do_stuff(argv[1:])
This trick/hack/convention allows the same file to be
sourced/included/imported by another without having it come to action.
This is useful both for (unit)testing and for code reuse using the same
files.
test case :
$ cat so
echo _=$_
echo 0=$0
for i in ${.sh[@]}; do nameref sh=.sh.$i; echo $i:$sh; done
$ cat sub
. so
$ ksh93 so | egrep '^(0|file)'
0:so
file:/tmp/so
$ ksh93 sub | egrep '^(0|file)'
0:sub
file:/tmp/so
answer :
if [[ ${.sh.file##*/} = ${0##*/} ]]; then
echo sourced
else
echo subshell
fi
done ;^)
Regards,
Cyrille Lefevre
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