shoney.arickathil
5e8e0960bc
- term.size(fd) -> ?TermSize{cols,rows}: TIOCGWINSZ, resize's read twin;
nil = not a tty (expected answer, never a trap)
- term.width(cp): libc wcwidth under C.UTF-8 (LC_CTYPE set on first
use, host-locale fallback): -1 control, 0 combining, 1, 2
- ids 108/109 (all four registrations); TermSize predeclared
- legs: PTY sized 77x33 from outside answers exactly that, pipe answers
nil, widths a/CJK/combining/BEL = 1/2/0/-1; test_term 81/0, woc 557/0
- story runtime-v2 6 recorded done; board row appended
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
(cherry picked from commit 1514fb46c21c4318856cfcb3ca2b4d430caba72b)
24 lines
1 KiB
Markdown
24 lines
1 KiB
Markdown
---
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track: runtime-v2
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iteration: "6"
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status: done
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readiness: ready
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---
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# runtime-v2 6 — term.size and term.width: the two verbs the wmux ladder asked for
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> Part of [Story — runtime-v2: the runtime beyond sockets](00-story.md).
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> Named by the wmux parity-ladder brainstorm (2026-09-02) as the ONLY
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> runtime work all nine wmux rungs need beyond the landed track.
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>
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> **DONE 2026-09-02, same day.** `term.size(fd) -> ?TermSize {cols,
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> rows}` — TIOCGWINSZ, the resize verb's read twin; nil = not a tty (an
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> expected answer, never a trap). `term.width(cp) -> Int` — libc
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> `wcwidth` under `C.UTF-8` (first use sets `LC_CTYPE`; falls back to
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> the host locale): -1 control, 0 combining, 1, 2. Ids 108/109;
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> `TermSize` joins the predeclared records. Consumers: wmux 1 (attach
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> at the client's real size), wmux 2 (grid column math), wmux 6
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> (multi-client min-size, SIGWINCH forwarding).
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>
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> Legs in `test_term.c`: a PTY sized 77×33 from outside answers exactly
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> that; a pipe answers nil; widths a=1, U+4E2D=2, U+0301=0, BEL=-1.
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