Programming Forums > Script Programming > Bash / Shell Scripting

elmo · Oct 14th, 2004, 2:32 PM

alright, i got some code like this:

function foo() {
  echo "var: $var"
}

function bar() {
  for i in `seq 10 10 100`; do
     var=$(($var + $i))
     echo $i
  done
}

bar
foo

this will set var to some value, and echo $i

if i try to add some nifty stuff to the second function

(Toggle Plain Text)

...
function bar() {
  for i in `seq 10 10 100`; do
     var=$(($var + $i))
     echo $i
  done | dialog --gauge "ra ra ra" 10 20 0
}
...

the gauge will work, but var wont be set to anything due to variable protection (or some such).

Is there any way around this, so that var will be accesible in foo()?

Vorlin · Feb 28th, 2005, 5:11 PM

Change the

(Toggle Plain Text)

done | dialog --guage "ra ra ra" 10 20 0

to

(Toggle Plain Text)

done && dialog --guage "ra ra ra" 10 20 0

. The | declares you to send the output from the previous command when nothing was passed from the for loop.

Oct 14th, 2004, 2:32 PM	#1
elmo Newbie Join Date: Oct 2004 Posts: 4 Rep Power: 0	alright, i got some code like this: (Toggle Plain Text) function foo() { echo "var: $var" } function bar() { for i in `seq 10 10 100`; do var=$(($var + $i)) echo $i done } bar foo function foo() { echo "var: $var" } function bar() { for i in `seq 10 10 100`; do var=$(($var + $i)) echo $i done } bar foo this will set var to some value, and echo $i if i try to add some nifty stuff to the second function (Toggle Plain Text) ... function bar() { for i in `seq 10 10 100`; do var=$(($var + $i)) echo $i done \| dialog --gauge "ra ra ra" 10 20 0 } ... ... function bar() { for i in `seq 10 10 100`; do var=$(($var + $i)) echo $i done \| dialog --gauge "ra ra ra" 10 20 0 } ... the gauge will work, but var wont be set to anything due to variable protection (or some such). Is there any way around this, so that var will be accesible in foo()?

Feb 28th, 2005, 5:11 PM	#2
Vorlin Newbie Join Date: Feb 2005 Posts: 12 Rep Power: 0	Change the (Toggle Plain Text) done \| dialog --guage "ra ra ra" 10 20 0 done \| dialog --guage "ra ra ra" 10 20 0 to (Toggle Plain Text) done && dialog --guage "ra ra ra" 10 20 0 done && dialog --guage "ra ra ra" 10 20 0 . The \| declares you to send the output from the previous command when nothing was passed from the for loop. __________________ --Vorlin "Systems administration - it's not just my job, it's how I buy video games!"

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Programming Forums > Script Programming > Bash / Shell Scripting

Variable Scope Problems