[Bug 1866137] [NEW] /usr/share/initramfs-tools/hooks/plymouth hangs: no THEME_PATH

[Andreas Hasenack]

Public bug reported:

I'm doing a release upgrade from eoan to focal of my irc bouncer, and
noticed it hanging when generating the initramfs:

Setting up linux-generic (5.4.0.14.17) ...
Processing triggers for initramfs-tools (0.136ubuntu1) ...
update-initramfs: Generating /boot/initrd.img-5.4.0-14-generic
(hangs)

Process listing shows:
/bin/sh /usr/share/initramfs-tools/hooks/plymouth
 \_ /bin/sh /usr/share/initramfs-tools/hooks/plymouth
     \_ grep ImageDir *= *
     \_ sed s/ImageDir *= *//

The code is:
THEME_PATH="$(update-alternatives --query default.plymouth 2>/dev/null | sed -e '/^Value:/!d' -e 's/^Value: \(.*\)/\1/')"
IMAGE_PATH=$(grep "ImageDir *= *" ${THEME_PATH} | sed 's/ImageDir *= *//')

THEME_PATH is empty:
ubuntu at irc-proxy:~$ update-alternatives --query default.plymouth 2>/dev/null | sed -e '/^Value:/!d' -e 's/^Value: \(.*\)/\1/'
ubuntu at irc-proxy:~$ update-alternatives --query default.plymouth
update-alternatives: error: no alternatives for default.plymouth

and grep is then waiting for something on its stdin, forever.

At this moment, plymouth is version 0.9.4git20200109-0ubuntu3.2 from
focal already.

** Affects: plymouth (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  I'm doing a release upgrade from eoan to focal of my irc bouncer, and
  noticed it hanging when generating the initramfs:
  
  Setting up linux-generic (5.4.0.14.17) ...
  Processing triggers for initramfs-tools (0.136ubuntu1) ...
  update-initramfs: Generating /boot/initrd.img-5.4.0-14-generic
  (hangs)
  
- 
  Process listing shows:
  /bin/sh /usr/share/initramfs-tools/hooks/plymouth
-  \_ /bin/sh /usr/share/initramfs-tools/hooks/plymouth
-      \_ grep ImageDir *= *
-      \_ sed s/ImageDir *= *//
+  \_ /bin/sh /usr/share/initramfs-tools/hooks/plymouth
+      \_ grep ImageDir *= *
+      \_ sed s/ImageDir *= *//
  
  The code is:
  THEME_PATH="$(update-alternatives --query default.plymouth 2>/dev/null | sed -e '/^Value:/!d' -e 's/^Value: \(.*\)/\1/')"
  IMAGE_PATH=$(grep "ImageDir *= *" ${THEME_PATH} | sed 's/ImageDir *= *//')
  
  THEME_PATH is empty:
  ubuntu at irc-proxy:~$ update-alternatives --query default.plymouth 2>/dev/null | sed -e '/^Value:/!d' -e 's/^Value: \(.*\)/\1/'
  ubuntu at irc-proxy:~$ update-alternatives --query default.plymouth
  update-alternatives: error: no alternatives for default.plymouth
  
  and grep is then waiting for something on its stdin, forever.
+ 
+ At this moment, plymouth is version 0.9.4git20200109-0ubuntu3.2 from
+ focal already.

-- 
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https://bugs.launchpad.net/bugs/1866137

Title:
  /usr/share/initramfs-tools/hooks/plymouth hangs: no THEME_PATH

Status in plymouth package in Ubuntu:
  New

Bug description:
  I'm doing a release upgrade from eoan to focal of my irc bouncer, and
  noticed it hanging when generating the initramfs:

  Setting up linux-generic (5.4.0.14.17) ...
  Processing triggers for initramfs-tools (0.136ubuntu1) ...
  update-initramfs: Generating /boot/initrd.img-5.4.0-14-generic
  (hangs)

  Process listing shows:
  /bin/sh /usr/share/initramfs-tools/hooks/plymouth
   \_ /bin/sh /usr/share/initramfs-tools/hooks/plymouth
       \_ grep ImageDir *= *
       \_ sed s/ImageDir *= *//

  The code is:
  THEME_PATH="$(update-alternatives --query default.plymouth 2>/dev/null | sed -e '/^Value:/!d' -e 's/^Value: \(.*\)/\1/')"
  IMAGE_PATH=$(grep "ImageDir *= *" ${THEME_PATH} | sed 's/ImageDir *= *//')

  THEME_PATH is empty:
  ubuntu at irc-proxy:~$ update-alternatives --query default.plymouth 2>/dev/null | sed -e '/^Value:/!d' -e 's/^Value: \(.*\)/\1/'
  ubuntu at irc-proxy:~$ update-alternatives --query default.plymouth
  update-alternatives: error: no alternatives for default.plymouth

  and grep is then waiting for something on its stdin, forever.

  At this moment, plymouth is version 0.9.4git20200109-0ubuntu3.2 from
  focal already.

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