# print subset of file with timestamp between 
# specified startSec and endSec.
# timeStamp is in first column
# Presumes that file timestamps are sorted in increasing order.
BEGIN {
    ### print "ARGC: " ARGC;
    if (ARGC < 3) {
	print "usage: startSec endSec timestamp-file";
	exit;
    }

    startSec = ARGV[1];
    ARGV[1] = "";
    endSec = ARGV[2];
    ARGV[2] = "";

    ### printf "startSec: %d  endSec: %d\n", startSec, endSec;

    if (endSec <= startSec) {
	printf "endSec must be greater than startSec\n";
	exit;
    }
}

NF == 0 { next; }
/^#/ { next; }

{
    if ($1 >= startSec && $1 < endSec) {
	print;
    }

    if ($1 > endSec) {
	# All done
	exit;
    }
}


END {
    
}