Use sh(1) arithmetic instead of expr(1)
Use sh(1) arithmetic instead of expr(1)

Save a few fork(2)/exec(2) calls

maier/nad,sean-/nad,circonus-labs/nad,maier/nad,sean-/nad,HeinrichHartmann/nad,maier/nad,HeinrichHartmann/nad,esproul/nad,hjhart/nad,HeinrichHartmann/nad,maier/nad,keithf4/nad,HeinrichHartmann/nad,keithf4/nad,keithf4/nad,esproul/nad,esproul/nad,keithf4/nad,hjhart/nad,maier/nad,keithf4/nad,HeinrichHartmann/nad,sean-/nad,circonus-labs/nad,maier/nad,HeinrichHartmann/nad,hjhart/nad,esproul/nad,sean-/nad,esproul/nad,hjhart/nad,circonus-labs/nad,circonus-labs/nad,circonus-labs/nad,sean-/nad,hjhart/nad,circonus-labs/nad