Explaining behaviour of sudo bash "$0" "$@"; Post: 303025419

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Top Forums Shell Programming and Scripting Explaining behaviour of sudo bash "$0" "$@"; Post 303025419 by boqsc on Friday 2nd of November 2018 07:01:21 AM

11-02-2018

Registered User

Quote:

Originally Posted by rbatte1

If you move the sudo outside the if (and therefore run it every time) the code will call itself every time, and call itself, and call itself..........
fi[/CODE]

I hope that this helps,
Robin

Yep, that's infinite loop, thanks for pointing that out. That might be the case.

The final version looks like this(only added comments that explains bahaviour):
(Any suggestions to make it more readable would be great)

Code:

#!/bin/bash

# Checking if the user who executed this script, needs to type password to execute sudo
sudo -n true 2> /dev/null
if [ $? = 1 ]
  then echo "please run as root"
       echo "haha you have not power here";
       echo "You need to enter password";
  # else echo "Your password is cached or running as Root";
fi

# Checking if this .sh script is ran with sudo
if [ $EUID != 0 ]; then
    #Run this whole .sh script with sudo 
    exec sudo bash "$0" "$@"
fi

declare commandOutput=$(apt-add-repository multiverse);
if echo "$commandOutput" | grep -q "distribution component is already enabled"; then 
  echo "multiverse repository is already enabled"; 
fi

Last edited by boqsc; 11-02-2018 at 08:24 AM..

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LEARN ABOUT MOJAVE

heimdal_debug

heimdal_debug(5)					      BSD File Formats Manual						  heimdal_debug(5)

NAME

     heimdal_debug -- how to turn on/off debugging for Kerberos tools

DESCRIPTION

     The heimdal_debug kerberos frameworks have several knobs for controlling logging.	The different framework knobs are:

     libkrb
	  The Kerberos library, some gss-api Kerberos output ends up here too

     kcm  the kcm library (credentials cache, ntlm client)

     kdc  the kerberos KDC output

     digest-service
	  the digest service (ntlm server)

CONFIGURATION FILE

	  [logging]
		  <subsystem> = 0-/SYSLOG:
     and watch syslog for logging information.

APPLE MAC OS X

     First turn up syslog debugging
	   sudo syslog -c 0 -d
     then you can see the syslog output in Console.app or by running
	   syslog -w -k org.h5l.asl
     To enable more extensive debugging logging for each subsystem, use the following commands:

	   Kerberos Library
		sudo defaults write /Library/Preferences/com.apple.Kerberos logging -dict-add krb5 '0-/OSLOG:normal:'

	   digest-server
		sudo defaults write /Library/Preferences/com.apple.Kerberos logging -dict-add digest-service '0-/OSLOG:normal:'

	   kcm	sudo defaults write /Library/Preferences/com.apple.Kerberos logging -dict-add kcm '0-/OSLOG:normal:'

	   kdc	sudo defaults write /Library/Preferences/com.apple.Kerberos logging -dict-add kdc '0-/OSLOG:normal:'

	   MIT Kerberos Shim
		defaults write com.apple.MITKerberosShim EnableDebugging -bool true

	   GSS-API framework logging
		sudo defaults write /Library/Preferences/com.apple.GSS DebugLevel -int 10

Other options on Mac OS X
	  Make the admin API pretend to the server even on client
	       sudo defaults write /Library/Preferences/com.apple.Kerberos ForceHeimODServerMode -bool true

SEE ALSO

     gss(5), kerberos(8)

HEIMDAL 
							   Sep 30, 2011 							   HEIMDAL