%!
Each element of %!
has a true value only if $!
is set to that value. For example, $!{ENOENT}
is true if and only if the current value of $!
is ENOENT
; that is, if the most recent error was "No such file or directory" (or its moral equivalent: not all operating systems give that exact error, and certainly not all languages). To check if a particular key is meaningful on your system, use exists
$!{the_key}
; for a list of legal keys, use keys %!
. See Errno for more information, and also see $!.
This variable was added in Perl 5.005.
Please login to continue.