[Bug 1944027] Re: On Pi 4b running Ubuntu 21.04 and pi-bluetooth warnings about substitution syntax appear at boot

[Dave Jones]

** Changed in: pi-bluetooth (Ubuntu)
     Assignee: (unassigned) => Dave Jones (waveform)

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Title:
  On Pi 4b running Ubuntu 21.04 and pi-bluetooth warnings about
  substitution syntax appear at boot

Status in pi-bluetooth package in Ubuntu:
  Confirmed

Bug description:
  Description:
  /usr/lib/udev/rules.d/90-pi-bluetooth.rules contains substitution syntax that dash doesn't like.

  Result:
  Warning output from journalctl -b:
  systemd-udevd[976]: /usr/lib/udev/rules.d/90-pi-bluetooth.rules:14 Invalid value "/bin/sh -c 'ALIASES=/proc/device-tree/aliases; if cmp -s $ALIASES/uart0 $ALIASES/serial0; then echo 0;elif cmp -s $ALIASES/uart0 $ALIASES/serial1; then echo 1; else exit 1; fi'" for PROGRAM (char 58: invalid substitution type), ignoring, but please fix it.

  systemd-udevd[976]: /usr/lib/udev/rules.d/90-pi-bluetooth.rules:27
  Invalid value "/bin/sh -c 'ALIASES=/proc/device-tree/aliases; if [ -e
  /dev/ttyAMA0 ]; then exit 1; elif cmp -s $ALIASES/uart0
  $ALIASES/serial0; then echo 0;elif cmp -s $ALIASES/uart0
  $ALIASES/serial1; then echo 1; else exit 1; fi'" for PROGRAM (char 97:
  invalid substitution type), ignoring, but please fix it.

  systemd-udevd[976]: /usr/lib/udev/rules.d/90-pi-bluetooth.rules:38
  Invalid value "/bin/sh -c 'ALIASES=/proc/device-tree/aliases; if cmp
  -s $ALIASES/uart1 $ALIASES/serial0; then echo 0; elif cmp -s
  $ALIASES/uart1 $ALIASES/serial1; then echo 1; else exit 1; fi '" for
  PROGRAM (char 58: invalid substitution type), ignoring, but please fix
  it.

  Expected Result:
  No warnings

  Notes:
  - This is on Ubuntu 21.04. With pi-bluetooth/hirsute,now 0.1.15ubuntu2 arm64. However, these warnings have been present for some time, on earlier versions of the package.

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