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マニュアルページ概要の中かっこはどういう意味ですか？ [コピー]

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マニュアルページ概要の中かっこはどういう意味ですか？ [コピー]

この質問には要約構文に対する良い答えがありますが、中かっこ「{}」に関する情報はありません。 マンページで概要について学びます。

tar マニュアルページの例

名前

 tar -- manipulate tape archives

要約

 tar [bundled-flags <args>] [<file> | <pattern> ...]
 tar {-c} [options] [files | directories]
 tar {-r | -u} -f archive-file [options] [files | directories]
 tar {-t | -x} [options] [patterns]

中かっこは、「中かっこ内でこれらのオプションを使用する場合、これは使用形式です」を意味すると思います。誰でもこれを確認できますか？

ベストアンサー1

ああ、私は説明をもう一度読んで、私の仮定は正しいと思います。異なるオプションの具体的な使用法は次のとおりです。

最初のサマリーテーブルには、「バンドル」オプションの単語が表示されます。

好ましい使用法を示すその他の要約フォーム

DESCRIPTION
     tar creates and manipulates streaming archive files.  This implementation can extract from tar, pax, cpio, zip, jar, ar, xar, rpm, 7-zip,
     and ISO 9660 cdrom images and can create tar, pax, cpio, ar, zip, 7-zip, and shar archives.

     The first synopsis form shows a ``bundled'' option word.  This usage is provided for compatibility with historical implementations.  See
     COMPATIBILITY below for details.

     The other synopsis forms show the preferred usage.  The first option to tar is a mode indicator from the following list:
     -c      Create a new archive containing the specified items.  The long option form is --create.
     -r      Like -c, but new entries are appended to the archive.  Note that this only works on uncompressed archives stored in regular files.
             The -f option is required.  The long option form is --append.
     -t      List archive contents to stdout.  The long option form is --list.
     -u      Like -r, but new entries are added only if they have a modification date newer than the corresponding entry in the archive.  Note
             that this only works on uncompressed archives stored in regular files.  The -f option is required.  The long form is --update.
     -x      Extract to disk from the archive.  If a file with the same name appears more than once in the archive, each copy will be extracted,
             with later copies overwriting (replacing) earlier copies.  The long option form is --extract.

     In -c, -r, or -u mode, each specified file or directory is added to the archive in the order specified on the command line.  By default,
     the contents of each directory are also archived.

     In extract or list mode, the entire command line is read and parsed before the archive is opened.  The pathnames or patterns on the command
     line indicate which items in the archive should be processed.  Patterns are shell-style globbing patterns as documented in tcsh(1).

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