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Full Discussion: How to tell which shell is running a script
Top Forums Shell Programming and Scripting How to tell which shell is running a script Post 302364748 by vgersh99 on Friday 23rd of October 2009 06:25:29 PM
Old 10-23-2009
I don't have linux in front of me, but most likely it should be a combination of what you do on above with what 'Scrutinizer' suggested previously.
Maybe others could 'port' this to linux for you.
 

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LEARN ABOUT SUSE

ctrlaltdel

CTRLALTDEL(8)						     Linux Programmer's Manual						     CTRLALTDEL(8)

NAME

       ctrlaltdel - set the function of the Ctrl-Alt-Del combination

SYNOPSIS

       ctrlaltdel hard|soft

DESCRIPTION

       Based  on examination of the linux/kernel/sys.c code, it is clear that there are two supported functions that the Ctrl-Alt-Del sequence can
       perform: a hard reset, which immediately reboots the computer without calling sync(2) and without any other preparation; and a soft  reset,
       which sends the SIGINT (interrupt) signal to the init process (this is always the process with PID 1).  If this option is used, the init(8)
       program must support this feature.  Since there are now several init(8) programs in the Linux community, please consult	the  documentation
       for the version that you are currently using.

       ctrlaltdel is usually used in the /etc/rc.local file.

FILES

       /etc/rc.local

SEE ALSO

       simpleinit(8), init(8)

AUTHOR

       Peter Orbaek (poe@daimi.aau.dk)

AVAILABILITY

       The ctrlaltdel command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

Linux 1.2							  25 October 1993						     CTRLALTDEL(8)
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