Since when does “S” fall in the range a-z? Beware of the LC_COLLATE environment variable.
somehost# mkdir STOCK somehost# mv [a-z]* STOCK mv: cannot move `STOCK' to a subdirectory of itself, `STOCK/STOCK' somehost#
It did move everything but “STOCK”. Let’s move the files back and fire up strace:
somehost# mv STOCK/* . somehost# strace -f mv [a-z]* STOCK ... execve("/bin/mv", ["mv", "lmhosts", "secrets.tdb", "smb.conf", "smbpasswd", "smbusers", "STOCK", "STOCK"], [/* 28 vars */]) = 0 ...
Happens at least under with BASH 2.05b1 and BASH 3.2. At the smart prodding of a coworker, let’s check the manpage for bash:
nocaseglob If set, bash matches filenames in a case-insensitive fashion when performing pathname expansion (see Pathname Expansion above).
No, “set -o” shows that’s not set.
Pattern Matching [...] Matches any one of the enclosed characters. A pair of characters separated by a hyphen denotes a range expression; any character that sorts between those two characters, inclusive, using the current locale's collating sequence and character set, is matched. If the first character following the â€˜[â€™ is a â€˜!â€™ or a â€˜^â€™ then any character not enclosed is matched. A â€˜âˆ’â€™ may be matched by including it as the first or last character in the set. A â€˜]â€™ may be matched by including it as the first character in the set. The sorting order of characters in range expressions is determined by the current locale and the value of the LC_COLLATE shell variable, if set. For example, in the default C locale, â€˜[a-dx-z]â€™ is equivalent to '[abcdxyz]â€™. Many locales sort characters in dictionary order, and in these locales â€˜[a-dx-z]â€™ is typically not equivalent to â€˜[abcdxyz]â€™; it might be equivalent to â€˜[aBbCcDdxXyYz]â€™, for example. To obtain the traditional interpretation of ranges in bracket expressions, you can force the use of the C locale by setting the LC_COLLATE or LC_ALL environment variable to the value â€˜Câ€™.
somehost# echo $LC_COLLATE en_US.UTF-8 somehost# LC_COLLATE=C somehost# mv STOCK/* . somehost# mv [a-z]* STOCK somehost#