Execute a shell command and save the result as a variable

Hi, does anybody know how can i execute a shell command and save the result as an Asterisk variable?

core show functions does.

PS This is not a support forum.

exten => 4002,1,Answer
exten => 4002,n,Set(RESULT=${SHELL(date +%s)})
exten => 4002,n,NoOp(${RESULT})
exten => 4002,n,Hangup

stackoverflow.com/questions/1414 … k-dialplan