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BEGIN Clause Help Needed

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# 1  
Old 06-13-2009
BEGIN Clause Help Needed
what does this clause means in UNIX

'BEGIN { FS="|";OFS="|" }

the complete clause is like

find . -name $filename | xargs awk -v s1=$String1 -v s2=$String2 -v s3=$String3 -v s4=$String4 'BEGIN { FS="|";OFS="|" }


Please advice.
# 2  
Old 06-13-2009
I think you might have never gone through that big man page of awk
this might help you
Quote:
BEGIN and END Patterns

Actions specified with the BEGIN pattern are performed before any input is read. Actions specified with the END pattern are performed after all input
has been read. Multiple BEGIN and END patterns are allowed and processed in the order specified. An END pattern can precede a BEGIN pattern within
the program statements. If a program consists only of BEGIN statements, the actions are performed and no input is read. If a program consists only of
END statements, all the input is read prior to any actions being taken.
# 3  
Old 06-14-2009
Quote:
Originally Posted by jojo123
what does this clause means in UNIX

'BEGIN { FS="|";OFS="|" }

It sets the input field separator (FS) and the output field separator (OFS) to the pipe symbol. It could also have been written as:

Code:
BEGIN { FS = OFS = "|" }

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