Edit: /usr/share/perl5/autodie.pm (11763B)
package autodie;
use 5.008;
use strict;
use warnings;
use Fatal ();
our @ISA = qw(Fatal);
our $VERSION;
BEGIN {
$VERSION = '2.06_01';
}
use constant ERROR_WRONG_FATAL => q{
Incorrect version of Fatal.pm loaded by autodie.
The autodie pragma uses an updated version of Fatal to do its
heavy lifting. We seem to have loaded Fatal version %s, which is
probably the version that came with your version of Perl. However
autodie needs version %s, which would have come bundled with
autodie.
You may be able to solve this problem by adding the following
line of code to your main program, before any use of Fatal or
autodie.
use lib "%s";
};
# We have to check we've got the right version of Fatal before we
# try to compile the rest of our code, lest we use a constant
# that doesn't exist.
BEGIN {
# If we have the wrong Fatal, then we've probably loaded the system
# one, not our own. Complain, and give a useful hint. ;)
if ($Fatal::VERSION ne $VERSION) {
my $autodie_path = $INC{'autodie.pm'};
$autodie_path =~ s/autodie\.pm//;
require Carp;
Carp::croak sprintf(
ERROR_WRONG_FATAL, $Fatal::VERSION, $VERSION, $autodie_path
);
}
}
# When passing args to Fatal we want to keep the first arg
# (our package) in place. Hence the splice.
sub import {
splice(@_,1,0,Fatal::LEXICAL_TAG);
goto &Fatal::import;
}
sub unimport {
splice(@_,1,0,Fatal::LEXICAL_TAG);
goto &Fatal::unimport;
}
1;
__END__
=head1 NAME
autodie - Replace functions with ones that succeed or die with lexical scope
=head1 SYNOPSIS
use autodie; # Recommended: implies 'use autodie qw(:default)'
use autodie qw(:all); # Recommended more: defaults and system/exec.
use autodie qw(open close); # open/close succeed or die
open(my $fh, "<", $filename); # No need to check!
{
no autodie qw(open); # open failures won't die
open(my $fh, "<", $filename); # Could fail silently!
no autodie; # disable all autodies
}
=head1 DESCRIPTION
bIlujDI' yIchegh()Qo'; yIHegh()!
It is better to die() than to return() in failure.
-- Klingon programming proverb.
The C
pragma provides a convenient way to replace functions
that normally return false on failure with equivalents that throw
an exception on failure.
The C pragma has I, meaning that functions
and subroutines altered with C will only change their behaviour
until the end of the enclosing block, file, or C.
If C is specified as an argument to C, then it
uses L to do the heavy lifting. See the
description of that module for more information.
=head1 EXCEPTIONS
Exceptions produced by the C pragma are members of the
L class. The preferred way to work with
these exceptions under Perl 5.10 is as follows:
use feature qw(switch);
eval {
use autodie;
open(my $fh, '<', $some_file);
my @records = <$fh>;
# Do things with @records...
close($fh);
};
given ($@) {
when (undef) { say "No error"; }
when ('open') { say "Error from open"; }
when (':io') { say "Non-open, IO error."; }
when (':all') { say "All other autodie errors." }
default { say "Not an autodie error at all." }
}
Under Perl 5.8, the C structure is not available, so the
following structure may be used:
eval {
use autodie;
open(my $fh, '<', $some_file);
my @records = <$fh>;
# Do things with @records...
close($fh);
};
if ($@ and $@->isa('autodie::exception')) {
if ($@->matches('open')) { print "Error from open\n"; }
if ($@->matches(':io' )) { print "Non-open, IO error."; }
} elsif ($@) {
# A non-autodie exception.
}
See L for further information on interrogating
exceptions.
=head1 CATEGORIES
Autodie uses a simple set of categories to group together similar
built-ins. Requesting a category type (starting with a colon) will
enable autodie for all built-ins beneath that category. For example,
requesting C<:file> will enable autodie for C, C,
C, C and C.
The categories are currently:
:all
:default
:io
read
seek
sysread
sysseek
syswrite
:dbm
dbmclose
dbmopen
:file
binmode
close
fcntl
fileno
flock
ioctl
open
sysopen
truncate
:filesys
chdir
closedir
opendir
link
mkdir
readlink
rename
rmdir
symlink
unlink
:ipc
pipe
:msg
msgctl
msgget
msgrcv
msgsnd
:semaphore
semctl
semget
semop
:shm
shmctl
shmget
shmread
:socket
accept
bind
connect
getsockopt
listen
recv
send
setsockopt
shutdown
socketpair
:threads
fork
:system
system
exec
Note that while the above category system is presently a strict
hierarchy, this should not be assumed.
A plain C