Executing /tmp/testprog.sh
PROG_STDIN: GLOB(0x17f250), tell(PROG_STDIN): -1
PROG_STDOUT: GLOB(0x17f268), tell(PROG_STDOUT): -1
output: Sleeping for 3 seconds
Sleeping for 5 seconds

PROG_STDERR: GLOB(0x17f220), tell(PROG_STDERR): -1
error: The sky is falling.