LinuxQuestions.org - [SOLVED] How to launch LSB script from rc0.d?

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How to launch LSB script from rc0.d?

Hello here!
I am a newbie in Linux. I've Debian 8.2 & LXDE on my desktop PC. I'd like to make a script to empty a trash can automatically. I've found an aversome script here. I changed it a little and added an "INIT INFO" block. Here it is:

Code:

#! /bin/sh

### BEGIN INIT INFO

# Provides:          empty-trash

# Required-Start:    

# Required-Stop:

# Default-Start:    5

# Default-Stop:

# Short-Description: Empty Trash

### END INIT INFO



DAYS=-1

find /home/username/.local/share/Trash -type f -mtime +$DAYS -delete

find /home/username/.local/share/Trash/files/* -depth -type d -exec rmdir --ignore-fail-on-non-empty {} +

exit 0

"DAYS=-1" - it is just for test, it will be increased.

After creating the file (~./empty-trash) I did the following:

Code:

# mv empty-trash /etc/init.d/

# cd /etc/init.d

# chown root:root empty-trash

# chmod +x empty-trash

# update-rc.d empty-trash defaults

...and my script worked fine. But I'd like to launch it at shutdown.
I "uninstalled" the script an edited it:

Code:

# update-rc.d -f empty-trash remove

# leafpad /etc/init.d/empty-trash

Here is the edited script:

Code:

#! /bin/sh

### BEGIN INIT INFO

# Provides:          empty-trash

# Required-Start:    

# Required-Stop:    $all

# Default-Start:

# Default-Stop:      0

# Short-Description: Empty Trash

### END INIT INFO



DAYS=-1

find /home/username/.local/share/Trash -type f -mtime +$DAYS -delete

find /home/username/.local/share/Trash/files/* -depth -type d -exec rmdir --ignore-fail-on-non-empty {} +

exit 0

I saved the script and launched:

Code:

# update-rc.d empty-trash defaults

...and my script stopped to work.

What am I doing wrong? Can anybody help me, please?

Sorry for my bad English and thanks in advance!

The $all means run as the last script which is not going to work for runlevel 0. I would say you want the script to first but using $local_fs for the Required-Stop will at least start your your script prior to the local file systems unmounting.

Thank you for the response but it is incorrect in this case. It is correct for 'S' scripts but it is impossible to launch any 'S' script in runlevel 0 because a 'S' script will be called later than the last 'K' script. But the last 'K' script refers to halt.

With 'Required-Stop: $all' it places a symlink to my script at the first place in /etc/rc0.d but it still does not work. BTW, I already tried 'Required-Stop: $local_fs' and some other values and combinations but with no success.

Ok, guess I did not understand the https://wiki.debian.org/LSBInitScripts/ wiki but since update-rc.d does place your script in rc0.d and as k01... then $all is not the problem. I did try your script on a debian 7 and it ran and then finally tried it on a version 8 vm. The first time it didn't run but the second time it did. Not sure what I did to get it to work.

It is strange... Did you try my second script? The first one works fine for me, too.
IMO, the problem is more deeper. Maybe I need to add something to a line 'Should-stop'? I tried 'Should-stop: $all' - no difference. Or maybe sendsigs kills my script too quickly?

My script does delete all old files and dirs from the Trash. But any symlinks it doesn't. There is a solution:

Code:

#! /bin/sh

### BEGIN INIT INFO

# Provides:          empty-trash

# Required-Start:    

# Required-Stop:

# Default-Start:    5

# Default-Stop:

# Short-Description: Empty Trash

### END INIT INFO



DAYS=10

find /home/user/.local/share/Trash ! -type d -mtime +$DAYS -delete

find /home/user/.local/share/Trash/files/* -depth -type d -exec rmdir --ignore-fail-on-non-empty {} +

exit

The only difference is in the "type" option of the first "find" command.
The old variant:

Code:

-type f

That means "find files only"
The new variant:

Code:

! -type d

That means "find all except directories"

But I still can't make my script work at runlevel 0. Has somebody any ideas?

Well, I just fixed this. There is my new script below:

Code:

#!/bin/sh



if [ 0=$(runlevel | cut -d ' ' -f2) ]; then

  DAYS=10

  find /home/user/.local/share/Trash ! -type d -mtime +$DAYS -delete

  find /home/user/.local/share/Trash/files -depth -type d -exec rmdir --ignore-fail-on-non-empty {} +

fi

exit 0

The runlevel checking is from here.

I opened the file '/etc/lightdm/lightdm.conf' (as root) and uncommented the line 'session-cleanup-script=' and added here the path to my script. I saved the file and that's all.

It is not exactly a LSB script and it does not run directly from rc0.d but it runs at runlevel 0 only and works as expected.