-p FILE (conditional operator)

true if the file exists and is a named pipe (also known as a FIFO).

Links

• Named pipe on Wikipedia
• Bash manual
• POSIX specification of test

Examples

Different ways to test if a file is a named pipe:

1 2 3 4

test -p ~/file && echo "named pipe" [ -p ~/file ] && echo "named pipe" # Bash [[ -p ~/file ]] && echo "named pipe"