Re: shebang length limits

[The Wanderer]

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On 09/05/2014 at 08:20 AM, Greg Wooledge wrote:

> On Fri, Sep 05, 2014 at 08:09:40AM -0400, The Wanderer wrote:
> 
>> What exactly is the limit on the length of a shebang line in an 
>> executable script, when called from within bash?
> 
> Shebangs are handled by the kernel, not by bash.  For more details,
>  Sven Mascheck's page is the best out there: 
> http://www.in-ulm.de/~mascheck/various/shebang/
> 
> So, the answer depends on your operating system.

I already found that page, as well as other discussion, and looked up
the appropriate limit in the appropriate header files. I just wasn't
sure whether it was the definitive statement for this context,
particularly given the odd mismatch I was seeing.

While that does address the question of what the actual length limit is,
it doesn't address the mismatch I saw in the error message which
occurred when the path was too long. Does that error, and the associated
mismatch, in fact originate from within bash?

If not, where does it originate?

If so, any chance of getting the mismatch fixed, so that the shebang
printed when the path is too long is at least the full truncated length
of what was actually searched for rather than only the leading portion
of that path?

- -- 
      The Wanderer

Warning: Simply because I argue an issue does not mean I agree with any
side of it.

Secrecy is the beginning of tyranny.
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