Network Programming with Perl

Other Perl Globals

Table B.3 lists other Perl globals used in the body of this book. The first column is the Perl punctuation variable, and the second is its English-language equivalent when the English module is loaded.

Table B.3. Other Perl Globals

Variable	English	Description
$?	$CHILD_ERROR	Status returned by the last pipe close, backtick, or successful call to wait(); a status of 0 generally indicates that the child terminated without error
$!	$ERRNO	Error message from the last failed system call
$^E	$EXTENDED_OS_ERROR	Extended error information from non-UNIX operating systems
$<digit>		Last matched subexpression from a successful pattern match (e.g., $1, $2)
$&	$MATCH	Entire string matched by the last successful pattern match