It should be noted that shell metacharacters are also not allowed under POSIX: * https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_0

It should be noted that shell metacharacters are also not allowed under POSIX: * https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_437 https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1... A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9 . _ - * https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_282 https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1... (Hyphen forbidden as first character.)