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Document hashondef and nolog options for POSIX.1-2024 #168

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May 9, 2025
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Document hashondef and nolog options for POSIX.1-2024 #168

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9 changes: 7 additions & 2 deletions doc/_set.txt
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Expand Up @@ -275,8 +275,13 @@ The options defined in the standard are:
- +-o nolog+
- +-o vi+

Yash does not support the nolog option, which prevents
Yash does not support the +nolog+ option. This option prevented
link:syntax.html#funcdef[function definitions] from being added to
link:interact.html#history[command history].
link:interact.html#history[command history] in old versions of Korn shell, but
is no longer supported by any popular shell.

The behavior of the +hash-on-def+ option in yash is based on POSIX.1-2001.
Many existing shells implement this option with different behavior, and
POSIX.1-2024 no longer imposes any behavior on this option.

// vim: set filetype=asciidoc textwidth=78 expandtab:
5 changes: 4 additions & 1 deletion doc/ja/_set.txt
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Expand Up @@ -191,6 +191,9 @@ POSIX 規格に定義されているオプションは限られています。
- +-o nolog+
- +-o vi+

POSIX ではこのほかに、{zwsp}link:syntax.html#funcdef[関数定義]を{zwsp}link:interact.html#history[コマンド履歴]に登録しないようにする +-o nolog+ オプションを規定していますが、yash はこれをサポートしていません。
Yash は +nolog+ オプションをサポートしていません。
このオプションは古い Korn シェルで{zwsp}link:syntax.html#funcdef[関数定義]を{zwsp}link:interact.html#history[コマンド履歴]に登録しないようにする機能がありましたが、現在ほとんどのシェルではサポートされていません。

Yash の +hash-on-def+ オプションの動作は、POSIX.1-2001 に基づいています。既存の多くのシェルはこのオプションを異なる動作で実装しており、POSIX.1-2024 ではこのオプションの動作は規定されなくなりました。

// vim: set filetype=asciidoc expandtab:
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