RE: Korn shell function paramter passing
- From: <Joel.Patterson@xxxxxxxxxxx>
- To: <niall.litchfield@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 25 Jun 2009 09:02:43 -0400
Ok I fixed it (already had a printmessage subroutine that 'tee'd to
LOGFILE so I replaced any printf statements with printmessage statements
in a couple routines). I removed the tee from the call to main and
SUBJECT simply became global.
Now I don't need to return SUBJECT at all, or pass it to cleanup,
(expected behavior). But it seems as though this is defeating the my
original purpose of using subroutines, (kind of) ... I was trying when
possible to call any function with tee ( function | tee -a $logfile) and
avoid doing that with each printf statement or continuously calling my
printmessage routine.
Calling the function and piping through tee works of coursce except when
you want to parameterize or pass variables back and forth. It is at
this point where my idea could use a little tweaking from others that
have more experience redirecting the various streams, ie &1, &2, &3, &4,
etc.
Joel Patterson
Database Administrator
904 727-2546
________________________________
From: Niall Litchfield [mailto:niall.litchfield@xxxxxxxxx]
Sent: Thursday, June 25, 2009 8:16 AM
To: Patterson, Joel
Subject: Re: Korn shell function paramter passing
or if you're like me you've typoed it somewhere and can't see it :(
On Thu, Jun 25, 2009 at 1:15 PM, Niall Litchfield
<niall.litchfield@xxxxxxxxx> wrote:
other reasons, less common
* you've called the main function either in the background or some
other way that forks a new shell (eg a pipe).
* according to http://www.bolthole.com/solaris/ksh-functions.html
you can get this when you use backticks - never done this myself.
On Thu, Jun 25, 2009 at 1:11 PM, <Joel.Patterson@xxxxxxxxxxx> wrote:
No.
Joel Patterson
Database Administrator
904 727-2546
________________________________
From: Niall Litchfield [mailto:niall.litchfield@xxxxxxxxx]
Sent: Thursday, June 25, 2009 8:07 AM
To: Patterson, Joel
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: Korn shell function paramter passing
are you using typeset to define local variables by any chance?
Niall
On Thu, Jun 25, 2009 at 1:00 PM, <Joel.Patterson@xxxxxxxxxxx> wrote:
Joel Patterson
Database Administrator
904 727-2546
This one I'm spending to much time on.
I have a korn shell script.
#!/usr/bin/ksh
Do some initialization commands
Call a function startlogfile
Call function 'main'
main calls function runsomething
Runsomething initializes and returns "${SUBJECT}"
main can print ${SUBJECT}
main returns ${SUBJECT} (or "${SUBJECT}", or ASUBJECT=${SUBJECT}
successfully ${ASUBJECT}, or "${ASUBJECT}"
outer most shell cannot print $SUBJECT
what's going on?
Thanks,
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--
Niall Litchfield
Oracle DBA
http://www.orawin.info <http://www.orawin.info/>
--
Niall Litchfield
Oracle DBA
http://www.orawin.info <http://www.orawin.info/>
--
Niall Litchfield
Oracle DBA
http://www.orawin.info
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