helpThe GNU Bourne-Again SHell - Support: sr #108305, bash exec converts relative paths...

 
 

sr #108305: bash exec converts relative paths to absolute, Other Bourne-style shells don't (and I feel that's more sensible)

Submitted by:  Thomas Jahns <tjahns>
Submitted on:  Tue 21 May 2013 04:21:38 PM UTC  
 
Category: NonePriority: 5 - Normal
Severity: 3 - NormalStatus: None
Privacy: PublicAssigned to: None
Open/Closed: OpenOperating System: GNU/Linux

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Tue 21 May 2013 04:21:38 PM UTC, original submission:

Hello,

I ran into an inconsistency of bash vs. other shells like dash today on Debian/GNU Linux:

$ cat bar.sh
#! /bin/sh
./foo.sh
exec ./foo.sh
$ cat foo.sh
#! /bin/sh
echo $0
$ bash ./bar.sh
./foo.sh
/tmp/foo.sh
$ dash ./bar.sh
./foo.sh
./foo.sh

I also checked on AIX 6.1 with /bin/sh (which is old ksh) and /bin/ksh93, both give the same result as dash.

Since I see no reason why $0 should have different values on fork/exec vs. plain exec, I propose to change this unless there's a compelling reason to keep the deviation from expected behavior.

Kind regards, Thomas Jahns

Thomas Jahns <tjahns>

 

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