If go here, else go there

[BIS]

Hallo,

How would I write a shellscript that

if (something true)
then (go to this step/line)
else (go to that step/line)
fi

Is this possible?

Or would I need something like

While (something not true)
do (something)
else (go to this step/line)

Can someone point me in the general direction?

 

[DSMARWAY]

hi

it depends how many times you want the task doing

if once use the if statement

if you need to do it until the user exits or enters a correct option then use the while loop

HTH

 

[squash]

Ok I would use a function for this.

#!/usr/bin/ksh

Bugs() # first function
{
echo " Whats up Doc"
}
Porky() # Second function
{
echo " Thats all folks"
}

if [ true ]
then
Bugs
else
Porky
fi



Ok pretty basic but it should get u started.
lookup function and if
man function
man if
for more details.
Or you can ask for more details here.
Good Luck
Doug

 

[iribach]

what about 'case" ???
case ${aa:-$1} in abba) do this
;; *) do that
;; esac
exit 0

 

[BIS]

Mnay thanks all, that should get me going.

 

[BIS]

Hallo Folks,

Is it possible to call a function from within another function?

Bob()
{
echo "Bob"
}

Billy()
{
echo "Billy"
Bob
}

 

[BIS]

... or alternatively, is it possible to call two functions in an if/then statement

if
(someting)
then
Bob
else
Billy AND Bob
fi

 

[gamerland]

I do not recall for all shells, but in Korn (ksh), functions calling functions are fine. In fact, I have several "utility" functions I copy into the top of scripts so I do not have to rewrite the code.

 

[squash]

In answer to you questions on funtions.

name all your functions at the top of your script and then you can call them from anywhere.
From within a loop, from within another function, or just for fun anytime.

Here is a webpage I found most helpful

http://www.injunea.demon.co.uk/pages/page212.htm

Good luck
Doug

 

[BIS]

Thanks !