Executing grep in perl always returns and empty string -

when run grep command line in centos 5.8 using following command get

grep -e "appliance=\"vpmx\"" /filepath/appliance_data.sh

with results of

appliance="vpmx"; export appliance

when run following commands perl

$out = `grep -e "appliance=\"vpmx\"" /filepath/appliance_data.sh`; `echo "output grep tv: $out" >> /tmp/debug`;

the $out variable empty string

how same output command line grep?

i have tried quiet grep using -q parameter, , have tried command < /dev/null no change in result.

you need escape backslashes backticks work double quoted string default:

$out = `grep -e "appliance=\\"vpmx\\"" /filepath/appliance_data.sh`;

alternatively, single quoted form of qx:

$out = qx'grep -e "appliance=\"vpmx\"" /filepath/appliance_data.sh';

O9