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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 SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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