topic Re: Creating Functions in Operating System - HP-UX

Creating Functions

Gilbert Standen_1 — Fri, 06 May 2005 08:06:12 GMT

Hi, it was suggested I post this in this forum.

When I create a function by pasting the code to create the function into a script and run the script, the script runs but when I try to execute the function, I get the message
ksh: get_time2: not found
However, if I just paste the code to the command line, it works.
For example:

oracle [/m02/oracle/scripts]
#get_time.ksh

oracle [/m02/oracle/scripts]
#get_time2
ksh: get_time2: not found.

oracle [/m02/oracle/scripts]
#more get_time.ksh
function get_time2 {
TIME=$(date '+%m/%d/%y-%H:%M:%S')
printf "$TIME\n"
}

oracle [/m02/oracle/scripts]
#function get_time2 {
> TIME=$(date '+%m/%d/%y-%H:%M:%S')
> printf "$TIME\n"
> }

oracle [/m02/oracle/scripts]
#get_time2
05/05/05-18:20:10

Question: how can I create the functions using code that executes within a shell script?

Re: Creating Functions

Uwe Zessin — Fri, 06 May 2005 08:31:41 GMT

Well, OpenVMS does not have a Korn shell ;-)

I think you have to do what is called 'source' the script:
# ./get_time.sh

Re: Creating Functions

Ian Miller. — Fri, 06 May 2005 08:48:24 GMT

(I think DCL is a lot more readable :-)

Gilbert,
you may get more help in the HPUX scripting forum
http://forums1.itrc.hp.com/service/forums/categoryhome.do?categoryId=150

Re: Creating Functions

Gilbert Standen_1 — Fri, 06 May 2005 09:33:57 GMT

Hi, replies are appreciated, but am not on OpenVMS ... not sure how that got into the mix ?
will move it to the scripting forum !
Gil

Re: Creating Functions

Darrel Louis — Sat, 07 May 2005 03:53:43 GMT

Hi,

You cannot call a function from the prompt, only a existing script.

Try the following:
Content get_time.ksh
#####
function get_time2 {
TIME=$(date '+%m/%d/%y-%H:%M:%S')
printf "$TIME\n"
}

get_time2

#####

Darrel

Re: Creating Functions

curt larson_1 — Sat, 07 May 2005 19:49:40 GMT

function names and definitions are not inherited by scripts or across seperate invocations of ksh. you should put function definitons in a file whose name is the name of the function, in a directory defined in the FPATH variable.

for a simple example:

in get_time.ksh

FPATH=/m02/oracle/functions
get_time2

create a file named get_time2 in the /m02/oracle/functions directory with your funtion definition within

Re: Creating Functions

Steven E. Protter — Sun, 08 May 2005 12:23:28 GMT

A script looks like this:

check_network() {

$SCMD network status > /dev/null
rcode=$?
# echo "Network status return code: ${rcode}"
return $rcode

} # End check_network()

It is sourced into another script that with code like this:

. /usr/contrib/bin/functions

Any scrip; with this line can now call the function check_network()

Thats from a bash script but I think it should work with the korn shell.

SEP

Re: Creating Functions

renarios — Mon, 09 May 2005 06:02:42 GMT

Hi gilbert,

In general, if you create a function in one shell, only that shell recognises the function.
When executing a script using ./script.sh a new shell is opened, script is executed, feedback is given and shell gets closed.
That's why you can't create a script with a function and after running the script, trying to execute the function.
If you run the script by . script.sh, the script is executed in the current shell, but that's not recommended. The FPATH variable is preferred.

Cheerio,

Renarios