AW: [PATCH] losetup: Create loop device if it does not exist

Jorg Vehlow lkml at
Wed Sep 25 08:17:12 UTC 2019

I'm not sure, if it matters ;) if you like it, but it is the way
util-linux's losetup works and I think this is the reference for busybox's


@Dietmar: Sorry for the duplicate, forgot to add the mailing list

-----Ursprüngliche Nachricht-----
Von: busybox <busybox-bounces at> Im Auftrag von
dietmar.schindler at
Gesendet: Mittwoch, 25. September 2019 07:45
An: busybox at
Betreff: RE: [PATCH] losetup: Create loop device if it does not exist

> From: busybox <busybox-bounces at> On Behalf Of Joerg Vehlow
> Sent: Monday, September 23, 2019 7:39 AM
> util-linux's losetup creates a loop device, if it is missing.
> This is missing in busybox's implementation.
> Testcase:
> losetup /dev/loop1000 <somepath>
> If /dev/loop1000 does not exist busybox give an error but
> util-linux's losetup just creates the file

I'm not sure whether I'd like to have a device file created if I made a typo
on the command line.
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