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I am using an awk script and the skeleton of the same is simple
awk '
BEGIN {
Variable declaration
}
{
ACTION PART
}
END
{
}' FILE A
The file A is such a huge file. So I wanted not to traverse the entire file and so what I am trying to do is, I am trying to keep some checks in ACTION PART in such a way that if that check is successful, then I need to skip reading the rest part of the file and directly go to END part.
My question is how would I redirect the script from ACTION PART to END Part based on the condition.. I am looking for some kind of command like "break" in for loop. Could you people share your ideas. Thank you.
300
Using the awk Command. Like sed's 'q [exit-code]', awk has the exit [expression] command to exit the awk script with a return value, such as 'exit 100'.
For example: $ awk ' > BEGIN { print "Analysis of \"li\"" } > /li/ { ++n } > END { print "\"li\" appears in", n, "records." }' mail-list -| Analysis of "li" -| "li" appears in 4 records. This program finds the number of records in the input file mail-list that contain the string ' li '.
END pattern: means that Awk will execute the action(s) specified in END before it actually exits.
The getline command returns 1 if it finds a record and 0 if it encounters the end of the file. If there is some error in getting a record, such as a file that cannot be opened, then getline returns -1. In this case, gawk sets the variable ERRNO to a string describing the error that occurred.
The exit command will do what you want.
From the man page:
Similarly, all the END blocks are merged, and executed when all the input is exhausted (or when an exit statement is executed).
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