[PATCH] makedevs: make special node creation idempotent

Arnout Vandecappelle arnout at mind.be
Sat Nov 5 14:44:24 UTC 2016



On 05-11-16 15:36, walter harms wrote:
> 
> Am 05.11.2016 14:37, schrieb Arnout Vandecappelle (Essensium/Mind):
>> > When makedevs is called for a second time with the same device file, it
>> > will fail because the files already exist and mknod() gives -EEXISTS.
>> > 
>> > To avoid this, check if the file already exists and if so, if it is of
>> > the right type. The chmod and chown changes are still done.
>> > 
> 
> i am not familiar with that program. Is this std. behavior ?

 makedevs is not a standard program, it is busybox-specific. So there is no
standard behaviour.

 We use it in Buildroot to populate /dev with standard device nodes. If you
re-run the /dev population step, (e.g. rebuild) it will fail because of this issue.

 Regards,
 Arnout

> 
> re,
>  wh
> 
> 

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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