Not exactly what you asked for, but there's ambiguity in the spec leading to different implementations. https://stackoverflow.com/questions/11376975/is-there-a

Not exactly what you asked for, but there's ambiguity in the spec leading to different implementations. https://stackoverflow.com/questions/11376975/is-there-a-minimally-posix-2-compliant-shell/16376043#16376043 https://stackoverflow.com/questions/11376975/is-there-a-mini...