On Tue, Nov 13, 2007 at 03:32:39PM +0000, cs wrote:
> #!/bin/bash -x
> TEMPFILE=`mktemp /tmp/chk_procs_XXX`
> trap 'date|mail -s "$0 error" [EMAIL PROTECTED];echo Error - aborting;\
> exit' ERR
>
> ### only allow one instance of this per user to run at a given time
> ps -elf|grep $0|grep -v grep > $TEMPFILE
> if [[ `cat $TEMPFILE | wc -l` -gt 1 ]]; then
> #cat $TEMPFILE
> date | mail -s '${0} already Running' [EMAIL PROTECTED]
> rm $TEMPFILE
> exit -1
> fi
> rm $TEMPFILE
>
>
> but that mails the string $0 not the value. Removing the quotes results
> in an error.
If I recall correctly, single quote dumps values literally. You might
want to use doublt quotes for the value of ${0} to be substituted,
though I am not 100% sure that that will solve the problem.
Kumar
--
Kumar Appaiah,
458, Jamuna Hostel,
Indian Institute of Technology Madras,
Chennai - 600 036
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