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Ad Hoc Protocols in Unix
andychu edited this page Jul 9, 2021
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Related: Unix Tools
- shebang lines: recognized by the kernel
- gF in Vim recognizes filename and line number!
- /* vim */ options
- yacc, in y.tab.c output:
#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.
- This actually affects the C compiler's idea of "current file and line". It affects error messages from C compiler, and debug info that goes into/alongside the executable. Code coverage tools probably read the debug info. I think it was invented as an internal protocol between C preprocessor -> C compiler, but proved useful for public use by code generation tools like yacc...
- various "text files" in
/proc
on Linux
eval "$(ssh-agent)"
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gcc -M
sends a Makefile fragment