In list context, returns a (possibly empty) list of filename expansions on the value of EXPR such as the standard Unix shell/bin/csh would do. In scalar context, glob iterates through such filename expansions, returning undef when the list is exhausted. This is the internal function implementing the<*.c> operator, but you can use it directly. If EXPR is omitted,$_ is used. The<*.c> operator is discussed in more detail in"I/O Operators" in perlop.
Note thatglob splits its arguments on whitespace and treats each segment as separate pattern. As such,glob("*.c *.h") matches all files with a.c or.h extension. The expressionglob(".* *") matches all files in the current working directory. If you want to glob filenames that might contain whitespace, you'll have to use extra quotes around the spacey filename to protect it. For example, to glob filenames that have ane followed by a space followed by anf, use either of:
@spacies = <"*e f*">;@spacies = glob '"*e f*"';@spacies = glob q("*e f*");If you had to get a variable through, you could do this:
@spacies = glob "'*${var}e f*'";@spacies = glob qq("*${var}e f*");If non-empty braces are the only wildcard characters used in theglob, no filenames are matched, but potentially many strings are returned. For example, this produces nine strings, one for each pairing of fruits and colors:
@many = glob "{apple,tomato,cherry}={green,yellow,red}";This operator is implemented using the standardFile::Glob extension. SeeFile::Glob for details, includingbsd_glob which does not treat whitespace as a pattern separator.
Portability issues:"glob" in perlport.
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