From: Chet Ramey <chet.ramey@case.edu>
To: "Ludovic Courtès" <ludo@gnu.org>, bug-bash@gnu.org
Cc: 22354@debbugs.gnu.org, chet.ramey@case.edu
Subject: bug#22354: Hash-bang line length
Date: Wed, 13 Jan 2016 11:18:38 -0500 [thread overview]
Message-ID: <569678DE.7020503__17931.8512593911$1452710382$gmane$org@case.edu> (raw)
In-Reply-To: <87lh7t7p4w.fsf@gnu.org>
On 1/13/16 5:25 AM, Ludovic Courtès wrote:
> Hello,
>
> The ‘READ_SAMPLE_BUF’ macro in execute_cmd.c reads at most 80 bytes from
> the hash-bang line. This is less than the already-small 128-byte limit
> in the Linux kernel¹ and can quite easily be hit².
That limit is huge compared to other Unixes, btw.
> What about changing it to 128 bytes (as well as the ‘sample’ array) to
> at least match Linux?
>
> (It might even make sense to make it bigger so that Bash might succeed
> when the kernel simply fails.)
If the kernel returns an errno other than ENOEXEC, bash isn't going to
`succeed'. This is entirely a cosmetic issue concerning the error message
bash prints when execve fails.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/
next prev parent reply other threads:[~2016-01-13 16:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87lh7t7p4w.fsf@gnu.org>
2016-01-13 13:19 ` bug#22354: Hash-bang line length Greg Wooledge
[not found] ` <20160113131902.GU27325@eeg.ccf.org>
2016-01-13 13:52 ` Ludovic Courtès
[not found] ` <87y4bt60zb.fsf@gnu.org>
2016-01-13 14:04 ` Greg Wooledge
2016-01-13 16:21 ` Chet Ramey
[not found] ` <20160113140441.GZ27325@eeg.ccf.org>
2016-01-13 16:23 ` Chet Ramey
[not found] ` <56967A06.8040104@case.edu>
2016-01-13 16:39 ` Greg Wooledge
[not found] ` <56967976.2080908@case.edu>
2016-01-13 17:41 ` Ludovic Courtès
[not found] ` <87vb6x2x7u.fsf@gnu.org>
2016-01-13 20:47 ` Chet Ramey
2016-01-13 16:18 ` Chet Ramey [this message]
2016-01-12 9:14 bug#22354: Test failure when running distcheck from out-of-tree build Taylan Ulrich Bayırlı/Kammer
2016-01-13 10:25 ` bug#22354: Hash-bang line length Ludovic Courtès
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