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hi .. it works in Solaris too ..
I have checked it out.

-U and -r are supported in solaris .. check in "man grep"

i think a "core" file might have been created in ur home directory search for it and remove it ..

so u can go for the following search

grep -sxnlidU <search pattern> */*

-s for suppressing the error
-x for searching for exact match
-i for ignore casse
-r for recursive search
-U...

#!/bin/bash

#let 'copy' is ur unix script u want to call from this program if sendmail
#service is enabled in ur system

${Mail:=`ps -ef | grep sendmail| grep -v "grep"`}

if [ $? -eq 0 ] ;...

use following syntax

make the content u r writing as a background process
ex::

mkfifo -m 600 foo
ls -l > foo &
cat foo