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[Bug 1550823] Re: checkarray doesn't work with sh = dash

 

** Changed in: mdadm (Debian)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1550823

Title:
  checkarray doesn't work with sh = dash

Status in mdadm package in Ubuntu:
  Triaged
Status in mdadm source package in Xenial:
  Triaged
Status in mdadm package in Debian:
  Fix Released

Bug description:
  As per https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=787950,
  /usr/share/mdadm/checkarray fails when it tries to read
  /sys/block/mdX/md/sync_action, if running under dash (or apparently
  most shells other than bash), with a 4.x kernel.

  Present in Ubuntu 15.10, where a default install does use /bin/sh ->
  dash, and runs Linux 4.2.

  A simple workaround is to make it a #!/bin/bash script.  Another
  alternative would be to read sync_action with cat, instead of the read
  built-in, since (as a reply on the Debian bug report says), the
  problem is char-at-a-time reading of the file in /sys.

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