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Full Discussion: Shall I go for uid or ppid?
Top Forums Shell Programming and Scripting Shall I go for uid or ppid? Post 302416308 by Lora Graham on Monday 26th of April 2010 05:14:27 AM
Old 04-26-2010
Shall I go for uid or ppid?
Hi Guys,
I'd like to ask your advice on the following, I've written this script to terminate a given process by name:
Code:
#!/bin/bash
echo 'Please enter the process you wish to terminate'
read process
pid=$(pidof $process)
kill -9 $pid
echo $2

to make it safer I want it to reject the killing of root owned processes.

I'm thinking of doing it using an if condition in two ways, either by the process parend ID or the process UID but I'm having some trouble getting there:
Code:
#!/bin/bash
echo 'Please enter the process you wish to terminate'
read process
pid=$(pidof $process)
ps -ef | grep '$process' | awk '{print $2}'
if [ '$2'="root"]
then
echo "The process cannot be terminated for safety reasons"
else
kill -9 $pid
echo $3

From what I understand there is no real command to get a ppid of a process so I'm trying to make it through the UID. What would you suggest?

Lora
Last edited by Franklin52; 04-26-2010 at 06:22 AM.. Reason: Please indent your code and use code tags!
 

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LEARN ABOUT HPUX

setpgid

setpgid(2)							System Calls Manual							setpgid(2)

NAME

       setpgid(), setpgrp2() - set process group ID for job control

SYNOPSIS

DESCRIPTION

       The  and system calls cause the process specified by pid to join an existing process group or create a new process group within the session
       of the calling process.	The process group ID of the process whose process ID is pid is set to pgid.  If pid is zero, the process ID of the
       calling	process is used.  If pgid is zero, the process ID of the indicated process is used.  The process group ID of a session leader does
       not change.

       is provided for backward compatibility only.

   Security Restrictions
       Some or all of the actions associated with this system call are subject to compartmental restrictions.

       See compartments(5) for more information about compartmentalization on systems that support that feature.  Compartmental  restrictions  can
       be  overridden  if  the process possesses the privilege (COMMALLOWED).  Processes owned by the superuser may not have this privilege.  Pro-
       cesses owned by any user may have this privilege, depending on system configuration.

       See privileges(5) for more information about privileged access on systems that support fine-grained privileges.

RETURN VALUE

       and return the following values:

	      Successful completion.
	      Failure.
		     is set to indicate the error.

ERRORS

       If or fails, is set to one of the following values.

	      The value of   pid matches the process ID of a child process of the calling process and the child process has successfully  executed
			     one of the exec(2) functions.

	      The value of   pgid is less than zero or is outside the range of valid process group ID values.

	      The process indicated by
			     pid is a session leader.

	      The value of   pid  is  valid  but matches the process ID of a child process of the calling process, and the child process is not in
			     the same session as the calling process.

	      The value of   pgid does not match the process ID of the process indicated by pid and there is no process with a	process  group	ID
			     that matches the value of pgid in the same session as the calling process.

	      The value of   pid does not match the process ID of the calling process or of a child process of the calling process.

AUTHOR

       and were developed by HP and the University of California, Berkeley.

SEE ALSO

       bsdproc(3C), exec(2), exit(2), fork(2), getpid(2), kill(2), setsid(2), signal(2), privileges(5), termio(7).

STANDARDS CONFORMANCE

																	setpgid(2)
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