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Index > Linux > treating of "--" option
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid 22 Mar 2007, 18:28
hi, doesn't anyone know what is "standard" treating of "--" option?

I found out that "-" is taken as filename ("cp file -", "ls -", etc..).

But i failed to understand what is "--".
Post 22 Mar 2007, 18:28
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arafel



Joined: 29 Aug 2006
Posts: 131
Location: Jerusalem, Israel
arafel 22 Mar 2007, 18:50
check http://www.phptr.com/articles/article.asp?p=175771&rl=1

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Post 22 Mar 2007, 18:50
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid 22 Mar 2007, 19:20
very good article, thanks.

However, i am not much smarter now:
Quote:
The special argument '--' indicates the end of all options. Any subsequent arguments on the command line are treated as operands, even if they begin with a dash.

what "operands"? could you give some example please?
Post 22 Mar 2007, 19:20
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arafel



Joined: 29 Aug 2006
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arafel 22 Mar 2007, 19:40
Suppose 'app' executes '/bin/ls':

./app -a -- /bin/ls -l

'-a' will be treated as an option by app, but '-l' will be passed to ls.
Post 22 Mar 2007, 19:40
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vid
Verbosity in development


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Posts: 7105
Location: Slovakia
vid 22 Mar 2007, 19:45
got it, thanks.

so everything behind "--" should be treated literary... thanks
Post 22 Mar 2007, 19:45
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f0dder



Joined: 19 Feb 2004
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f0dder 22 Mar 2007, 22:51
...including opening a file starting with a dash without prefixing with ./
Post 22 Mar 2007, 22:51
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid 22 Mar 2007, 23:11
f0dder: doesn't matter for me. My library will only process args meant for current application, eg. only up to "--"
Post 22 Mar 2007, 23:11
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