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Calling function in awk statement.

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# 1  
Old 03-31-2010
Calling function in awk statement.
Hi All,

I have an awk statement and a function defined in a script.

I am trying to call the function from inside awk statement, i.e.

Code:
awk ' myFunk () ;' filename

But when I define myFunk() before awk, then I receive this error:
Code:
s2.sh: line 48: syntax error: unexpected end of file

and when I define it after awk, ofcourse it says myFunk() not defined and similar.

Could you please guide on how to call this function from awk statement?

Best Regards..
# 2  
Old 03-31-2010
Can you explain what you're trying to achieve? You can't call a shell function like that with awk.
# 3  
Old 03-31-2010
Why do you need to do that? Pipe the result of the function to awk
Code:
myFunk inputfile | awk '{ do awk things here}'

# 4  
Old 03-31-2010
Quote:
Originally Posted by jim mcnamara
Why do you need to do that? Pipe the result of the function to awk
Code:
myFunk inputfile | awk '{ do awk things here}'

Actually, awk output is the input for myFunk(). So I am not sure if this will do the trick.

This is the awk statement ->

Code:
awk ":|/" {check 1, action 1; } /,/ {l=split($5,a,",") ; asort(a) ; myFunk() ;} {check 3, action 3;}'  filename

This is the function ->

Code:
myFunk() (
(
i=0;
while(i<l)
{
    flag=0;
    j=i+1;
    k=1;
    while[ j<l && (a[j]) eq (a[i]+1) ]do
    {
        j++;
        k++;
        flag=1;
    }
if(flag); then
{
    printf "host %s range %s %s\n", $4,a[i],a[j-1];
    i=j;
}
else
{
    printf "host %s port %s\n", $4,a[i];
}
fi
return()

The function is required to check the array values (which are already in sequence now) and will print ' line type 1 ' and if not in sequence, then print ' line type 2 .' For example; if the array has following values - 20,21,22,23,25 - then it will print this:

Code:
host <value> range 20 23
host <value> range 25

If the values are not in sequence - 20, 22, 24 - then it will print this:
Code:
host <value> range 20
host <value> range 22
host <value> range 24

Best Regards..
Last edited by morningSunshine; 03-31-2010 at 11:05 AM..
# 5  
Old 03-31-2010
Code:
s2.sh: line 48: syntax error: unexpected end of file

That's a sh script error, not an AWK error.

Quote:
Originally Posted by morningSunshine
Code:
awk ":|/" {check 1, action 1; } /,/ {l=split($5,a,",") ; asort(a) ; myFunk() ;} {check 3, action 3;}'  filename

That statement has an unmatched single quote, which is probably the reason for the sh giving an unexpected end of file error (it's looking for the end of a string when it hits end of file).

Aside from the quote, that's not a valid awk script. I would expect awk to abort with a syntax error. Is "action" a variable whose definition is omitted? Is "check" an awk user-defined funciton whose definition or inclusion you omitted? If so, you need to use parenthesis around its arguments:
Code:
{check(1, action 1)}

If "action" and "check" are not a variable and user-defined function, respectively, then I have no clue what you're going for there.

Regarding myFunk(), I really hope that's csh. Otherwise, that sh/bash/ksh script needs a lot of work Smilie

Regards,
Alister
Last edited by alister; 03-31-2010 at 11:47 AM..
# 6  
Old 03-31-2010
Quote:
Originally Posted by alister
Code:
s2.sh: line 48: syntax error: unexpected end of file

That's a sh script error, not an AWK error.

That statement has an unmatched single quote, which is probably the reason for the sh giving an unexpected end of file error (it's looking for the end of a string when it hits end of file).

Aside from the quote, that's not a valid awk script. I would expect awk to abort with a syntax error. Is "action" a variable whose definition is omitted? Is "check" an awk user-defined funciton whose definition or inclusion you omitted? If so, you need to use parenthesis around its arguments:
Code:
{check(1, action 1)}

If "action" and "check" are not a variable and user-defined function, respectively, then I have no clue what you're going for there.

Regarding myFunk(), I really hope that's csh. Otherwise, that sh/bash/ksh script needs a lot of work Smilie

Regards,
Alister
Hi Alister, sorry I was not clear about my earlier post. (check1, action1) were a sample text instead of the original script.

Here is the original script and function:

Code:
#!/bin/bash

awk -F ":|/" '/\*$/ {printf "host %s\n",$4;next}
              /,/ {l=split($5,a,",") ; asort(a) ; heybaby() ;next}
              /-/ {sub(/-/," ",$5) ; printf "host %s range %s\n",$4,$5;next}
              {printf "host %s port %s\n",$4,$5}' c2.txt

heybaby()
{
i=0;
while(i<l) do
{
    flag=0;
    j=i+1;
    k=1;
    while[ j<l && (a[j]) eq (a[i]+1) ]do
    {
        j++;
        k++;
        flag=1;
    }
    if(flag); then
    {
        printf "host %s range %s %s\n", $4,a[i],a[j-1];
        i=j;
    }
    else
    {
        printf "host %s port %s\n", $4,a[i];
    }
    fi
#        break;
} done
}

Update:
I have now been able to correct the syntax error from the script. Now upon executing the script, this error is appearing:
Quote:
awk: cmd. line:1: (FILENAME=c2.txt FNR=1) fatal: function `heybaby' not defined


Best Regards.
Last edited by morningSunshine; 03-31-2010 at 12:26 PM.. Reason: Updated the script / Syntax errors resolved
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