until command syntax error

Shell Programming and Scripting
1

Hi there.

I spent too much time away from Unix, now I can't remember how to issue a simple until command in ksh :mad:

could you tell me what is wrong with the following code sample:

export v = "1"

until [ $v -lt 5 ]
do
echo 'executing repeat_until'
v = `expr $v + 1`
done

I've already tried adding the semicolon to the end of the until line, in addition to a lot of other trials, but none of them made effect :confused:

Thanks for any help.

2

Next time, tell us what result you get!!! Do not just say that "what is wrong". A clue as to what system would be nice too...

You cant do:
export v = "1"
v = `expr $v + 1`
No spaces around the equal signs. You need to do:
export v="1"
v=`expr $v + 1`

3

don't need the 'export'
loose the spaces around '='

well...... wouldn't the above always be 'true' if you start with 'v=1' ?

how 'bout:

#!/bin/ksh

typeset -i v=1

until (( v > 5 ))
do
  echo 'executing repeat_until'
  v=$(( v + 1 ))
done
4

Sorry for my loose details on the problem, Perderabo.
And thanks for you both, my problem were indeed the spaces :mad: