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Shell Programming and Scripting

Dynamic script and cron

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Top Forums Shell Programming and Scripting Dynamic script and cron
# 8  
Old 07-04-2013
see comments in code sample ...
Code:
#! /bin/ksh

PATH=/usr/bin:/bin:/usr/sbin:/sbin

endtime=$(date +%H":"%M)  ## assumes endtime is exactly 24 hours after starttime

processfile(){
     curtime=$(date +%H":"%M)
     if [ "$curtime" != "$endtime" ]     ## checks that current time is not same as endtime
     then
           some_command &      ## put your actual command block here
           mpid=$(ps -ef | grep "some_command" | awk '{print $2}')
           sleep 3600                ## wait an hour
      else
           kill -9 $mpid > /dev/null     ## kill background process id
           mv /dir/file /dir1/file.$(date +%Y%m%d)
           sleep 60 # <-- adjust to make sure starttime is not equal to endtime
           processfile    ## call back function to restart processing over again
      fi
}

processfile ## start function to generate and move file

exit 0
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LEARN ABOUT OPENSOLARIS

endusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

	 /bin/bash		    /bin/csh
	 /bin/jsh		    /bin/ksh
	 /bin/ksh93		    /bin/pfcsh
	 /bin/pfksh		    /bin/pfsh
	 /bin/sh		    /bin/tcsh
	 /bin/zsh		    /sbin/jsh
	 /sbin/pfsh		    /sbin/sh
	 /usr/bin/bash		    /usr/bin/csh
	 /usr/bin/jsh		    /usr/bin/ksh
	 /usr/bin/ksh93 	    /usr/bin/pfcsh
	 /usr/bin/pfksh 	    /usr/bin/pfsh
	 /usr/bin/sh		    /usr/bin/tcsh
	 /usr/bin/zsh		    /usr/sfw/bin/zsh
	 /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

NOTES

       Restricted shells should not be listed in /etc/shells.

SunOS 5.11							    1 Nov 2007							  getusershell(3C)