Blob
1 awk ' # range.prep2 # Input: ["%begin"|"%end"|""] string (tab) number3 # Output: string (tab) ["b"|"e"|"a"] (tab) number5 BEGIN { FS = OFS = "\t" }6 { f2 = "a" }7 $1 ~ /^%begin/ { f2 = "b"; sub(/^%begin */, "", $1) }8 $1 ~ /^%end/ { f2 = "e"; sub(/^%end */, "", $1) }9 { print $1, f2, $2 }10 ' $*