[Bug 10236] New: busybox umount doesn't support -c

bugzilla at busybox.net bugzilla at busybox.net
Fri Aug 18 21:10:21 UTC 2017


https://bugs.busybox.net/show_bug.cgi?id=10236

            Bug ID: 10236
           Summary: busybox umount doesn't support -c
           Product: Busybox
           Version: 1.27.x
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Standard Compliance
          Assignee: unassigned at busybox.net
          Reporter: busybox at nmacleod.com
                CC: busybox-cvs at busybox.net
  Target Milestone: ---

systemd v234 now adds the "-c" argument when unmounting:

https://github.com/systemd/systemd/blob/v234/src/core/mount.c#L889

systemd v234 will exit with an error when unmounting a partition using busybox
1.27.x:
https://forum.libreelec.tv/thread/9599-8-1-0-beta-systemd-unmounts-fail-due-to-c-parameter-not-existing/

>From Ubuntu 16.04 "man umount":

-c, --no-canonicalize
   Do not canonicalize paths.  For more details about this option see the
mount(8) man page.  Note that umount does not pass this option to the
/sbin/umount.type helpers.

util-linux also supports -c.

At the very least busybox could just treat -c as a umount no-op?

Thanks.

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