bug#56077: closed (Pattern Beginning With Dash Throws Error)

[GNU bug Tracking System]

Your message dated Sat, 18 Jun 2022 16:49:58 -0500
with message-id <475a372e-2c87-703c-1b7e-99bdc566bc7f@cs.ucla.edu>
and subject line Re: bug#56077: Pattern Beginning With Dash Throws Error
has caused the debbugs.gnu.org bug report #56077,
regarding Pattern Beginning With Dash Throws Error
to be marked as done.

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56077: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=56077
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--- Begin Message --- Subject: Pattern Beginning With Dash Throws Error Date: Sat, 18 Jun 2022 22:05:07 +0200 (CEST)

Hello,

I just encountered a problem where when the search pattern starts with a dash, grep interprets it as an argument parameter. It does not matter in what kind of quotes the pattern is wrapped. See examples below.

$ echo "- break -" | grep "- break -"

grep: invalid option -- ' '

Usage: grep [OPTION]... PATTERNS [FILE]...

Try 'grep --help' for more information.

$ echo "- break -" | grep '- break -'

grep: invalid option -- ' '

Usage: grep [OPTION]... PATTERNS [FILE]...

Try 'grep --help' for more information.

$ echo "- break -" | grep '^- break -'

- break -

$ echo "- break -" | grep "^- break -"

- break -

$ echo "- break -" | grep "-s break -"

grep: invalid option -- ' '

Usage: grep [OPTION]... PATTERNS [FILE]...

Try 'grep --help' for more information.

grep Version: grep (GNU grep) 3.7

Sincerely,

Gazi

--- End Message ---

> --- Begin Message ---
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> Subject: 
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> Re: bug#56077: Pattern Beginning With Dash Throws Error
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> Date: 
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> Sat, 18 Jun 2022 16:49:58 -0500
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1
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>
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> On 6/18/22 15:05, gazip--- via Bug reports for GNU grep wrote:
> > I just encountered a problem where when the search pattern starts with a dash, 
> > grep interprets it as an argument parameter.
>
>
> That's normal for grep. See question 3 of:
>
> https://www.gnu.org/software/grep/manual/html_node/Usage.html
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>
>
> --- End Message ---