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Full Discussion: Debug script
Operating Systems Linux Ubuntu Debug script Post 303033238 by drew77 on Tuesday 2nd of April 2019 04:11:15 AM
Old 04-02-2019
Quote:
Originally Posted by Don Cragun
Given that we have no access to your system and can't see any diagnostic messages produced while your script is running, that you have not said anything about what you think might not be working in your script, and have not told us what appears in the file named /tmp/systemd_suspend_test.txt after you run your script; I find it difficult to suggest what you might do differently to debug your code.

I guess one might ask why you're throwing away all of the debugging data you have collected whenever your script is invoked with the first operand set to pre?

I guess one might ask why you don't include any timestamps in your debugging output?

I guess one might ask why you don't include a set -vx command at the start of your script and save the diagnostic information that would produce in a log file?
Nothing appears in ]/tmp/systemd_suspend_test.txt. Because if it did, the script would be working. :-)

As to your 1st guess, I have no idea how to implement what you are asking. i.e. The reason for my post.

Same with your 2nd and 3rd guesses.

--- Post updated at 03:11 AM ---

Quote:
Originally Posted by nelbren
Use:

Code:
 #/bin/bash -x

The script use two parameters:
  • ./script pre
  • ./script post
I added -x.

Nothing new happened.

My code is a modification of what is here.

Running scripts before and after suspend with systemd << Just another Linux geek
 

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LEARN ABOUT POSIX

service

SERVICE(8)						      System Manager's Manual							SERVICE(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service	runs  a System V init script or systemd unit in as predictable an environment as possible, removing most environment variables and
       with the current working directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT, or the name of a systemd unit.  The  existence  of  a
       systemd unit of the same name as a script in /etc/init.d will cause the unit to take precedence over the init.d script.	The supported val-
       ues of COMMAND depend on the invoked script. service passes COMMAND  and OPTIONS to the init script unmodified. For systemd  units,  start,
       stop, status, and reload are passed through to their systemctl/initctl equivalents.

       All scripts should support at least the start and stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice,
       first with the stop command, then with the start command.

       service --status-all runs all init scripts, in alphabetical order, with the status command. The status is [ + ] for running services, [ - ]
       for stopped services and [ ? ] for services without a status command.  This option only calls status for sysvinit jobs.

EXIT CODES

       service calls the init script and returns the status returned by it.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

       /{lib,run,etc}/systemd/system
	      The directories containing systemd units.

ENVIRONMENT

       LANG,  LANGUAGE,  LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES, LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEA-
       SUREMENT, LC_IDENTIFICATION, LC_ALL, TERM, PATH
	      The only environment variables passed to the init scripts.

SEE ALSO

       /etc/init.d/skeleton
       update-rc.d(8)
       init(8)
       invoke-rc.d(8)
       systemctl(1)

AUTHOR

       Miloslav Trmac <mitr@redhat.com>, Petter Reinholdtsen <pere@hungry.com>

       Licence: GNU Public Licence v2 (GPLv2)

COPYRIGHT

       2006 Red Hat, Inc.,  Petter Reinholdtsen <pere@hungry.com>

Jan 206 																SERVICE(8)
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