[Bug 46441] sh(1): Does not support PS1, PS2, PS4 parameter expansion
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Date: Wed, 08 Oct 2025 19:00:19 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=46441
Matthew Phillips <matthew@matthewphillips.info> changed:
What |Removed |Added
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CC| |matthew@matthewphillips.inf
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--- Comment #18 from Matthew Phillips <matthew@matthewphillips.info> ---
I've implemented parameter expansion support for PS1/PS2/PS4 prompts.
The patch adds support for:
- Simple variables: $USER, $PWD, $HOSTNAME
- Braced variables: ${USER}, ${HOME}
- Special parameters: $$, $?, $!
- Positional parameters: $0, $1, etc.
Tested via some shell scripts. The tests in tests/ weren't interactive and PS1
requires it. Please advice if some test cases are needed and how to add them.
Note: This implements parameter expansion only. Command substitution $(cmd) is
not yet supported and would require additional work.
Attachment below.
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