Re: [Xen-devel] [systemd-devel] [PATCH v5 12/14] autoconf: xen: enable explicit preference option for xenstored preference

[Andrew Lutomirski <luto@xxxxxxx>]

On Thu, Jun 5, 2014 at 12:24 PM, Lennart Poettering
<mzxreary@xxxxxxxxxxx> wrote:
> On Thu, 05.06.14 20:01, Luis R. Rodriguez (mcgrof@xxxxxxxx) wrote:
>
>> > Hmm? You should "exec" the real daemon binary at the end, not just fork
>> > it off. That wait the shell script process is replaced by the daemon
>> > binary, which is what you want.
>>
>> I tried both just running it and also running exec foo; both presented
>> the same issue given that shell exec does not really execve.
>
> Hmmm? You shell's "exec" command doesn't actually execve()? What are you
> using? This doesn't sound very accurate...

$ strace -e execve /bin/sh -c 'exec /bin/echo test'
execve("/bin/sh", ["/bin/sh", "-c", "exec /bin/echo test"], [/* 54 vars */]) = 0
execve("/bin/echo", ["/bin/echo", "test"], [/* 54 vars */]) = 0
test
+++ exited with 0 +++

I get similar results on Ubuntu using dash.

--Andy

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