NAME

glob - Globbing pathnames

DESCRIPTION

Certain CLI commands, like rm and ls, will expand a shell-compatibile glob pattern in the final path component. For example, "go#ep1/tmp/*.txt" would look for all files in /tmp that match "*.txt".

DETAILS

The rules below are standard POSIX.

A string is a wildcard pattern if it contains one of the characters ?, * or [. Globbing is the operation that expands a wildcard pattern into the list of pathnames matching the pattern. Matching is defined by:

A ? (not between brackets) matches any single character.

A * (not between brackets) matches any string, including the empty string.

Character Classes

An expression "[...]" where the first character after the leading [ is not an ! matches a single character, namely any of the characters enclosed by the brackets. The string enclosed by the brackets cannot be empty; therefore ] can be allowed between the brackets, provided that it is the first character. (Thus, "[][!]" matches the three characters [, ] and !.)

Ranges

There is one special convention: two characters separated by - denote a range. Thus, "[A-Fa-f0-9]" is equivalent to "[ABCDEFabcdef0123456789]". One may include - in its literal meaning by making it the first or last character between the brackets. Thus, "[]-]" matches just the two characters ] and -.

Complementation

An expression "[!...]" matches a single character, namely any character that is not matched by the expression obtained by removing the first ! from it. Thus, "[!]a-]" matches any single character except ], a and -.

One can remove the special meaning of ?, * and [ by preceding them by a backslash or enclosing enclosing them in quotes. Between brackets these characters stand for themselves.

Note:The Globus Online CLI shell also performs a level of backslash interpretation, so one must double up a backslash to send it to a command.

For example, this would require a file with a literal asterisk in its name:

$ ls go#ep1/tmp/\\*.txt

© 2010- The University of Chicago Legal