2.8 Obsolete Options and/or Features

This section describes features and/or command-line options from previous releases of gawk that are either not available in the current version or that are still supported but deprecated (meaning that they will not be in the next release).

The process-related special files ‘/dev/pid’, ‘/dev/ppid’, ‘/dev/pgrpid’, and ‘/dev/user’ were deprecated in gawk 3.1, but still worked. As of version 4.0, they are no longer interpreted specially by gawk. (Use PROCINFO instead; see Built-in Variables That Convey Information.)