Ad Hoc Protocols in Unix

Related: Unix Tools

Data / "microformats"

• shebang lines: recognized by the kernel
• gF in Vim recognizes filename and line number!
• /* vim */ options
• yacc, in parse.y:
  • #line 407 "/usr/homes/chet/src/bash/src/parse.y" /* yacc.c:1646 */
  • this appears to be recognized by code coverage reporting tools? They show parse.y output.

Code over Pipes

• eval $(ssh-agent)
• gcc -M sends a Makefile fragment