Re^2: Different meanings of $0 under the same operating system

...all of which can be summarised as: $0 represents the path by which *NIX locates the script

Except of course when it doesn't.

$ perl < knowthyself
My name is -...
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Comment on Re^2: Different meanings of $0 under the same operating system Download Code

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Re^3: Different meanings of $0 under the same operating system by Bloodnok (Vicar) on Nov 04, 2009 at 01:52 UTC
Ahh, but it is ... since, when used as a file name, '-' is an alternative id for stdin - witness most of the *NIX filter commands e.g. sort, join et al A user level that continues to overstate my experience :-))	[reply]
Re^4: Different meanings of $0 under the same operating system by JavaFan (Canon) on Nov 04, 2009 at 08:23 UTC
That many NIX filter commands take '-' to be STDIN is an application convention*. It's not something either the OS, or any of the standard libraries treat as special. In `perl < foo`, `-` isn't passed as an argument to any function of the `exec` family. It's not UNIX that is 'locating' the script.	[reply] [d/l] [select]
Re^4: Different meanings of $0 under the same operating system by ikegami (Patriarch) on Nov 04, 2009 at 02:36 UTC
I don't see your point. Are you saying opening '-' should give me the script, or are you saying that opening '-e' would normally give me the command line arguments? `>perl -le"print $0" -e >perl -lE"print $0" -e` [download]	[reply] [d/l]