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

Submitter:  Thomas Jahns <tjahns>
Submitted:  Tue 21 May 2013 04:21:38 PM UTC
   
 
Category:  None Priority:  5 - Normal
Severity:  3 - Normal Status:  Wont Do
Privacy:  Public Assigned to:  None
Open/Closed:  Open Operating System:  GNU/Linux
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Fri 13 Nov 2015 05:36:59 PM UTC, comment #1: 

It's not a bug, simply behavior that results in a cosmetic difference.  bash has always expanded the argument to `exec' to a full pathname, and there's no real reason to change that now.

Chet Ramey <chet>
Group administrator
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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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2015-11-13 chet StatusNone Wont Do
    2015-11-13 chet StatusDone None
    2015-11-13 chet StatusNone Done

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