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comp / comp.os.linux.misc / Re: How many ways can you run a script?

SubjectAuthor
* Re: How many ways can you run a script?Fritz Wuehler
+- Re: How many ways can you run a script?Fritz Wuehler
`* Re: How many ways can you run a script?Woozy Song
 `- Re: How many ways can you run a script?Nuno Silva

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Subject: Re: How many ways can you run a script?
From: Fritz Wuehler
Newsgroups: comp.os.linux.misc
Organization: dizum.com - The Internet Problem Provider
Date: Thu, 30 May 2024 01:14 UTC
References: 1
From: fritz@spamexpire-202405.rodent.frell.theremailer.net (Fritz Wuehler)
Subject: Re: How many ways can you run a script?
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Woozy Song <suzyw...@outlook.com> [WS]:
WS> I know these are not all equivalent and may have idiosyncracies.

Idiosyncracies is shell's middle name.
Use them or lose them, as they say...

$ ${0/-} myscript

(assuming that this is a login tty and your shell is bash)

Subject: Re: How many ways can you run a script?
From: Woozy Song
Newsgroups: comp.os.linux.misc
Organization: A noiseless patient Spider
Date: Sun, 2 Jun 2024 01:34 UTC
References: 1 2
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From: suzyw0ng@outlook.com (Woozy Song)
Newsgroups: comp.os.linux.misc
Subject: Re: How many ways can you run a script?
Date: Sun, 2 Jun 2024 09:34:09 +0800
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Fritz Wuehler wrote:
> Woozy Song <suzyw...@outlook.com> [WS]:
> WS> I know these are not all equivalent and may have idiosyncracies.
>
> Idiosyncracies is shell's middle name.
> Use them or lose them, as they say...
>
> $ ${0/-} myscript
>
> (assuming that this is a login tty and your shell is bash)
>

That is an obscure one! What does the /- mean?

Subject: Re: How many ways can you run a script?
From: Nuno Silva
Newsgroups: comp.os.linux.misc
Organization: A noiseless patient Spider
Date: Sun, 2 Jun 2024 10:48 UTC
References: 1 2 3
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From: nunojsilva@invalid.invalid (Nuno Silva)
Newsgroups: comp.os.linux.misc
Subject: Re: How many ways can you run a script?
Date: Sun, 02 Jun 2024 11:48:19 +0100
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On 2024-06-02, Woozy Song wrote:

> Fritz Wuehler wrote:
>> Woozy Song <suzyw...@outlook.com> [WS]:
>> WS> I know these are not all equivalent and may have idiosyncracies.
>>
>> Idiosyncracies is shell's middle name.
>> Use them or lose them, as they say...
>>
>> $ ${0/-} myscript
>>
>> (assuming that this is a login tty and your shell is bash)
>>
>
> That is an obscure one! What does the /- mean?

I'm guessing it's "delete all matches of '-' in $0"?

See «'${PARAMETER/PATTERN/STRING}'» in

info '(bash)Shell Parameter Expansion'

--
Nuno Silva

Subject: Re: How many ways can you run a script?
From: Fritz Wuehler
Newsgroups: comp.os.linux.misc
Organization: dizum.com - The Internet Problem Provider
Date: Sun, 2 Jun 2024 11:57 UTC
References: 1 2 3
From: fritz@spamexpire-202406.rodent.frell.theremailer.net (Fritz Wuehler)
Subject: Re: How many ways can you run a script?
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Woozy Song <suzyw...@outlook.com> [WS]:
WS> >$ ${0/-} myscript
WS> What does the /- mean?

Get rid of a possible (initial) "-" in $0:

$ echo $0; echo ${0/-}
-/bin/bash
/bin/bash

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