1# Test special parameter $$ (PID) in PS1 2output=$(PS1='pid:$$:' ENV=/dev/null ${SH} +m -i </dev/null 2>&1) 3# Check that output contains "pid:" followed by a number (not literal $$) 4case $output in 5*pid:\$\$:*) echo "PID not expanded, got literal \$\$"; exit 1 ;; 6*pid:[0-9]*) exit 0 ;; 7*) echo "Expected PID after 'pid:' in output"; exit 1 ;; 8esac 9