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Re: bash 4.4-rc1 EXECIGNORE not fully working?


From: Eric Blake
Subject: Re: bash 4.4-rc1 EXECIGNORE not fully working?
Date: Fri, 18 Mar 2016 12:20:33 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 03/18/2016 11:36 AM, Andreas Schwab wrote:
> Eric Blake <address@hidden> writes:
> 
>> But I don't know whether bash is calling exec[lv] with a canonicalized
>> name instead of exec[lv]p() with the kernel doing the lookup;
> 
> PATH searching is a pure user-space concept.

Fine. Then read that as "with libc doing the lookup", since execlvp() is
just a libc wrapper around the kernel execve().  The point I was trying
to get at was that I don't know if bash does all the PATH lookups
itself, or if it delegates; and therefore, I don't know if EXECIGNORE
can (or should) affect PATH lookups.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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