Re: почему глючит ls

[Oleksandr Gavenko <gavenkoa@gmail.com>]

On 2016-01-22, Vasiliy P. Melnik wrote:

>     > а так?
>     > ls -- *.pdf
>    
>     Так все прекрасно работает, правда не совсем понятно почему, в мане не
>     нашел такой опции. Спасибо огромное!

Как писали ране не нашли потому что:

  $ man 1 ls

  SEE ALSO
       Full documentation at: <http://www.gnu.org/software/coreutils/ls>
       or available locally via: info '(coreutils) ls invocation'

  $ info '(coreutils) Common options'

  ‘--’
     Delimit the option list.  Later arguments, if any, are treated as
     operands even if they begin with ‘-’.  For example, ‘sort -- -r’
     reads from the file named ‘-r’.

и у Вас ls/cp/mv/etc из GNU coreutils.

Далее POSIX.1-2008:

      Shell & Utilities

    1.4 Utility Description Defaults

  Default Behavior: When this section is listed as "None.", it means that the
  implementation need not support any options. Standard utilities that do not
  accept options, but that do accept operands, shall recognize "--" as a first
  argument to be discarded.

  The requirement for recognizing "--" is because conforming applications need
  a way to shield their operands from any arbitrary options that the
  implementation may provide as an extension. For example, if the standard
  utility foo is listed as taking no options, and the application needed to
  give it a pathname with a leading <hyphen>, it could safely do it as:

  foo -- -myfile

Тут текст конечно с оговорками, без прямого указания как работать с "--", но
по собраной POSIX chm неудобно искать другие упоминания.

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