ARGC question 1

[frangac]

Hi All,

Can I use a for loop to read the ARGC input parameters instead of me using ksh to do this for e.g.

Chris.sh NE DT 20061105 20061106 and must read
BEGIN{for (i=1;i<ARGC;i++){
if(ARGV != 4){
exit 1
}
else
{
$1=NE ,$2=DT etc..
}


Many Thanks
Chris

 

[Annihilannic]

You can, but it's not very clear what you're trying to do, i.e. what is the context of the problem?

You can use ARGC and ARGV to process the parameters provided to the awk script, but I get the impression you want to use it to parse the parameters of the calling shell script; is that right?

Or are you considering replacing your ksh script entirely with awk? You can do that by changing the shebang line to:

[tt]#!/usr/bin/awk -f[/tt]

Annihilannic.

 

[frangac]

Annihilannic,

Thanks for your response.

I would like my script to be fully awk (Chris) for e.g.

Chris NE DT 20061105 20061106 and must read

BEGIN{for (i=1;i<ARGC;i++){
if(ARGV != 4){
exit 1
}
else
{
if($1!=NE){
print something
exit 2
}
if($2!=DT){
print something
exit 3
}
etc
END{
}

I hope this helps

Many Thanks
Chris

 

[Annihilannic]

I think you mean something like this:

#!/usr/bin/awk -f
BEGIN{
        # 5 because script name is ARGV[0]
        if(ARGC != 5){
                print "four parameters required"
                exit 1
        }
        if(ARGV[1] != "NE"){
                print "first parameter is not NE"
                exit 2
        }
        if(ARGV[2] != "DT"){
                print "second parameter is not DT"
                exit 3
        }
        # insert rest of code here...
}

Annihilannic.

 

[frangac]

Hi Annihilannic

Thanks. That should give me a start.

Thanks Again
Chris