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Full Discussion: Global variable in for loop (BASH)
Top Forums Programming Global variable in for loop (BASH) Post 302884364 by Akshay Hegde on Monday 20th of January 2014 06:13:42 AM
Old 01-20-2014
Ok.. I created one test file named speed.log which looks as below

Code:
$ cat speed.log 
5

Code:
#!/bin/bash
pause=0
users=10

for (( ; ; ));do
   speed=$(cat speed.log)
   [ "$speed" -lt 10 ] && echo 1 ||  echo 0
   sleep 1
done >/tmp/myid &



function user(){
   pause=$(cat /tmp/myid)
   while [[ "$pause" = 1 ]]; do
      echo pausing script $(date)
          sleep 2
   done
  
}


for(( user = 1; user <= $users; user++ )); do
  user
done

Code:
$ bash test.sh
pausing script Mon Jan 20 16:40:42 IST 2014
pausing script Mon Jan 20 16:40:44 IST 2014
pausing script Mon Jan 20 16:40:46 IST 2014
pausing script Mon Jan 20 16:40:48 IST 2014
pausing script Mon Jan 20 16:40:50 IST 2014
pausing script Mon Jan 20 16:40:52 IST 2014
pausing script Mon Jan 20 16:40:54 IST 2014
pausing script Mon Jan 20 16:40:56 IST 2014
pausing script Mon Jan 20 16:40:58 IST 2014
......

Hope you can implement now according to your need

change sleep seconds and remove $(date) in echo statement, as I added it for testing purpose.
This User Gave Thanks to Akshay Hegde For This Post:
shadyuk
 

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LEARN ABOUT DEBIAN

ns_lctl

ns_lctl(3aolserver)					    AOLserver Built-In Commands 				       ns_lctl(3aolserver)

__________________________________________________________________________________________________________________________________________________

NAME

       ns_for, ns_foreach, ns_while, ns_lctl - Replacements for standard Tcl loop commands which enable monitoring and control

SYNOPSIS

       ns_for start test next body
       ns_foreach varname list body
       ns_foreach varlist1 list1 ?varlist2 list2 ...? body
       ns_while test body
       ns_lctl cancel id
       ns_lctl eval id script
       ns_lctl info id
       ns_lctl install command
       ns_lctl list
       ns_lctl pause id
       ns_lctl result id
_________________________________________________________________

DESCRIPTION

       The  ns_for, ns_foreach, and ns_while commands are replacements for cooresponding Tcl commands with the additional capability of monitoring
       and control through the ns_lctl command.

       ns_for start test next body
	      See the for(n) man page for usage.

       ns_foreach start test next body
	      See the foreach(n) man page for usage.

       ns_foreach varlist1 list1 ?varlist2 list2 ...? body
	      See the foreach(n) man page for usage.

       ns_while test body
	      See the while(n) man page for usage.

       ns_lctl cancel id
	      Mark the given loop to cancel at the next iteration, resulting in the loop returning with TCL_ERROR.

       ns_lctl eval id script

       ns_lctl info id

       ns_lctl install command

       ns_lctl list

       ns_lctl pause id

       ns_lctl result id

SEE ALSO

       for(n), foreach(n), while(n)

KEYWORDS

       threads, iteration, list, looping, cancel

AOLserver								4.5						       ns_lctl(3aolserver)
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