HAILCAP

Extract fields from an E-Mail header.
Reads the message from standard input.
Writes specified header fields to standard output.

Usage: hailcap FIELD [FIELD]...
               --help | -h
               --version | -v

Examples: hailcap From Subject << EoF
          Date:    Fri, 31 Dec 9999 23:59:59 -0000 (UTC)
          From:    Kang <kang@uranus.net>
          To:      Kodos <kodos@uranus.net>
          Subject: Invasion Plans
          EoF