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Full Discussion: help on understanding this script ( linux)
Top Forums Shell Programming and Scripting help on understanding this script ( linux) Post 302654587 by redologger on Tuesday 12th of June 2012 04:28:32 AM
Old 06-12-2012
Quote:
Originally Posted by Leion
The system_reboot.flg should be a flag file and not a script..

this is what your script is doing:
first it sets up some variables, including the PASS, which is holding the password to log into oracle.

after setting up the variables, it removes/deletes all the files that has a file extension of Z in directory /orabkup/USUP/

Then it checks for the non-existence of the /tmp/system_reboot.flg file.
if this is indeed not present, it will run the commands found in the oracle sql files.(hotback up as you mentioned)

I hope this is clear..
YEs is clearer now.

Check the existence of the flat file system_reboot.flg. From the name , i think is to check whether the last reboot indeed have remove / change the flag? Or is it to check for system reboot. To make sure it is not going to reboot while doing the backing?
 

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LEARN ABOUT HPUX

reboot

reboot(2)							System Calls Manual							 reboot(2)

NAME

       reboot - boot the system

SYNOPSIS

DESCRIPTION

       causes the system to reboot.  howto is a mask of reboot options (see specified as follows:

	      A file system sync is performed (unless
				  is set) and the processor is rebooted from the default device and file.

	      The processor is simply halted.
				  A sync of the file system is performed unless the flag is set.  should be used with caution.

	      On systems with cellular architecture, all cells in the partition are
				  rebooted  in order to reconfigure the stable complex configuration data.  On systems with non-cellular architec-
				  ture, the default is A sync of the file system is performed unless the flag is set.

	      Shut down the system firmware to a "ready to reconfigure" state and do not
				  reboot.  This option can be used only in combination with

	      A sync of the file system is not performed.

       Unless the flag has been specified, reboot(2) unmounts all mounted file systems and marks them clean so that it will not  be  necessary	to
       run fsck(1M) on these file systems when the system reboots.

       Only users with appropriate privileges can reboot a machine.

RETURN VALUE

       If successful, this call never returns.	Otherwise, a -1 is returned and is set to indicate the error.

ERRORS

       fails if this condition is encountered:

	      [EPERM]		  The effective user ID of the caller is not a user with appropriate privileges.

DEPENDENCIES

       The default file and device for is on the current root device.

AUTHOR

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

SEE ALSO

       reboot(1M), privileges(5).

																	 reboot(2)
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