Re: os.execute returns mangled exit code on linux
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- Subject: Re: os.execute returns mangled exit code on linux
- From: Sean Conner <sean@...>
- Date: 2013年1月18日 19:28:14 -0500
It was thus said that the Great Coda Highland once stated:
> On Fri, Jan 18, 2013 at 4:03 PM, Rena <hyperhacker@gmail.com> wrote:
>
> > What's the other information returned by system() then? Maybe that
> > should still be given as an additional return value.
> >
> > --
> > Sent from my Game Boy.
> >
>
> According to man 3 system, the _XOPEN_SOURCE feature test macro
> enables returning flags corresponding to the macros used by wait(2).
>
> http://linux.die.net/man/2/wait
>
> Not sure how useful this actually is. I've never needed it.
I use it. My current job is testing and as such, I use Lua to not only run
the programs (checking return codes and what not) but also to run the
various tests. The script I have to run one component has this bit (I wrote
a custom module to wrap Unix related process calls [1]):
if proc.sig.caught(proc.sig.CHLD) then
io.stderr:write("SCP stopped!\n")
status = proc.wait()
if status.status == 'normal' then
io.stderr:write(string.format("status=normal rc=%d\n",status.rc))
elseif status.status == 'terminated' then
io.stderr:write(string.format("status=terminated signal=%q\n",status.description))
end
-- some other code ...
end
It's important to know if the process seg faulted ...
-spc (And while not related to Lua, I also have code that does a stack
trace when a program crashes ... )
[1] https://github.com/spc476/lua-conmanorg/blob/master/src/process.c
[2] https://github.com/spc476/CGILib/blob/master/src/crashreport.c