topic If sentence .... (using or parameter) in Operating System - HP-UX

If sentence .... (using or parameter)

Manuales — Thu, 01 Jun 2006 16:54:50 GMT

is correct the following sentence with if command?

if [[ $6 != "a.sh" ]] || [[ $6 != "b.sh" ]]
then
echo "Im in the function..."
fi

$6 = hola
why enter program if $6 is hola and not b.sh or a.sh?

Thanks.

Re: If sentence .... (using or parameter)

A. Clay Stephenson — Thu, 01 Jun 2006 17:05:43 GMT

First, never test a variable that might be null test "${6}" rather than ${6}

Second, your syntax is bad.

if [[ "${6}" != "a.sh" || "${6}" != "b.sh" ]]
then
...
fi

OR
if [ "${6}" != "a.sh" -o "${6}" != "b.sh" ]
then
...
fi

finally you have a logical error

${6} is always going to not equal one of your constants so the statement will always be true. You probably meant AND rather than OR so substitute "&&" for "||" or "-o" for "-a".

The [[ ]] style if statement is more efficient because it is evaluated directly by the shell (Korn or POSIX) whereas the more traditional [ ] style is evaluated by the external test command.

Re: If sentence .... (using or parameter)

Manuales — Thu, 01 Jun 2006 17:23:30 GMT

THANKS A LOT !!!

Manuales :=)