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Full Discussion: Strange KSH behaviour - any comments?
Top Forums UNIX for Advanced & Expert Users Strange KSH behaviour - any comments? Post 302207245 by gsw_aix on Thursday 19th of June 2008 12:20:02 PM
Old 06-19-2008
Tools Strange KSH behaviour - any comments?
As you are probably aware, $# indicates the number of parameters passed into a korn shell script. But this appears to hang around for
sunsequent runs...????

A simple script:-
#!/usr/bin/ksh
echo "#parameters $#"
echo "\$1 $1"
echo "\$2 $2"

I run the script with 0 parameters (all fine)
# . par.ksh
#parameters 0
$1
$2

Now run it passing 2 parameters (all fine)
# . par.ksh aaa bbb
#parameters 2
$1 aaa
$2 bbb

Now run it again with no parameters (and it still thinks there are 2)!
# . par.ksh
#parameters 2
$1 aaa
$2 bbb

If I add set -- (to unset positional parameters) it works!
But I would have though that $# gets set every time its run,

Any ideas anyone ?????
 

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LEARN ABOUT MINIX

suspend

suspend(1)                                                         User Commands                                                        suspend(1)

NAME

       suspend - shell built-in function to halt the current shell

SYNOPSIS

   sh
       suspend

   csh
       suspend

   ksh
       suspend

DESCRIPTION

   sh
       Stops the execution of the current shell (but not if it is the login shell).

   csh
       Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.

   ksh
       Stops the execution of the current shell (but not if it is the login shell).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                         suspend(1)
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