glob (programming)

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glob() is a Unix library function that expands file names using a pattern matching notation reminiscent of regular expression syntax but without the expressive power of true regular expressions. The word "glob" is also used as a noun when discussing a particular pattern, e.g. "use the glob *.log to match all those log files".

The term glob is now used to refer more generally to limited pattern matching facilities of this kind in other contexts:

  • Larry Wall's Programming Perl discusses glob in the context of the Perl language.
  • Tcl contains both true regular expression matching facilities and a more limited kind of pattern matching often described as globbing.
  • Python has a glob module in the standard library which performs wildcard pattern matching on filenames

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