This is a small utility to display a prompt much like the fish default.

Features

• makes exactly 3 syscalls in main(): a single getcwd, geteuid and write each.
• Hardcoded for TERM=xterm-256color
• When in $PREFIX, abbreviates it to $P/....

Usage

• compile & install:

musl-gcc -static fish_prompt.c -o fish_prompt

cp fish_prompt $SOMEWHERE/bin/

• use as your prompt:

# ~/.config/fish/functions/fish_prompt.fish

function fish_prompt --description "Write out the prompt"
	# fish doesn't export these
	command fish_prompt $status $CMD_DURATION
end

libunistring

We use code verbatim from libunistring-1.0, which is licensed GPL3 and LGPL3. This is done to enable fully static linking with musl: some platforms (Android) have a huge overhead otherwise.

How this interacts with the EUPL is left as an excercise for the reader.