Shell Programming and Scripting

Hi folks,

I'm just running through an oreilly korn shell book but have witnessed an output difference on my own unix machine and the output provided in the book. Can anyone help?

create a script called ascript as follows:

function afunc {
print in function $0: $1 $2
var1="in function"
}
var1="outside of function"
print var1: $var1
print $0: $1 $2
afunc funcarg1 funcarg2
print var1: $var1
print $0: $1 $2


The expected output is also as follows:

var1: outside of function
ascript: arg1 arg2
in function afunc: funcarg1 funcarg2
var1: in function
ascript: arg1 arg2


However on my machine i get the following:

var1: outside of function
ascript: arg1 arg2
in function ascript: funcarg1 funcarg2
var1: in function
ascript: arg1 arg2

This is strange as the function doesn't seem to recognize its own name as its own $0 argument.

Thanks in advance

$0 represents the name of the current shell (or script). Functions execute in the original shell, so $0 would still represent the script name.

The O'Reilly book is wrong! (although it is a great book)

The O'Reilly book is correct. beckett, what system are you using? What version of the korn shell?

From The New Kornshell Command and Programming Language by Morris Bolsky and David Korn (page 76)

Apologies, the 'function funcName' syntax should set $0 to the name of the function.

The POSIX standard 'funcName () ' syntax would behave as I indicated earlier.

If you used the ksh variation of the syntax as your example would indicate, and you are seeing the POSIX behaviour, it is possible that you have an option set which you should turn off.
Try 'set +o posix'.

thanks for the quick replies,

when i login to the network through my local terminal i see SunOS 5.9 generic feb 2000

when i run a man on ksh it says KSH(1)
Thats all i can see with regard to versions

There a few other things that dont work as the oreilly book suggest e.g. even though the IFS variable is defined as a comma (,) when i use the $* argument it still separates parameters with a space. I have a feeling i'm going to run into more variances like this ahead, any advice??

Cheers

Beckett, post the results of uname -a and echo $SHELL.

Ok

uname -a

SunOS mlgw 5.8 Generic_108528-08 sun4u sparc SUNW,Ultra-5_10

$SHELL

/bin/ksh