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package Strict::Perl; |
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###################################################################### |
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# |
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# Strict::Perl - Perl module to restrict old/unsafe constructs |
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# |
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# http://search.cpan.org/dist/Strict-Perl/ |
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# |
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# Copyright (c) 2014, 2015, 2017, 2018, 2019 INABA Hitoshi in a CPAN |
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###################################################################### |
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$VERSION = '2019.07'; |
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$VERSION = $VERSION; |
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3387
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use 5.00503; |
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use strict; |
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BEGIN { $INC{'warnings.pm'} = '' if $] < 5.006 }; use warnings; $^W=1; |
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# use strict; |
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sub _strict { |
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require strict; |
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if (exists $INC{'Fake/Our.pm'}) { |
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# no strict qw(vars); on Fake::Our used |
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} |
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else { |
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strict::->import(qw(vars)); |
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} |
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strict::->import(qw(refs subs)); |
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} |
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# use warnings; |
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sub _warnings { |
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require warnings; |
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1028
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warnings::->import; |
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} |
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# install Fatal CORE::* functions |
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sub _Fatal { |
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my $package = (caller(1))[0]; |
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for my $function ( |
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qw(seek sysseek), # :io (excluded: read sysread syswrite) |
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qw(dbmclose dbmopen), # :dbm |
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qw(binmode close chmod chown fcntl flock ioctl truncate), # :file (excluded: fileno) |
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qw(chdir closedir link mkdir readlink rename rmdir symlink), # :filesys (excluded: unlink) |
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qw(msgctl msgget msgrcv msgsnd), # :msg |
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qw(semctl semget semop), # :semaphore |
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qw(shmctl shmget shmread), # :shm |
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qw(bind connect getsockopt listen recv send setsockopt shutdown socketpair), # :socket |
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qw(fork), # :threads |
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) { |
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_install_fatal_function($function, $package); |
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} |
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54
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# not on Modern::Open |
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if (not exists $INC{'Modern/Open.pm'}) { |
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for my $function (qw(open opendir sysopen pipe accept)) { |
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_install_fatal_function($function, $package); |
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} |
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} |
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} |
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# make fatal invocation |
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sub _fatal_invocation { |
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0
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my($function, $proto) = @_; |
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66
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0
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0
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my $n = -1; |
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0
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0
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local @_ = (); |
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0
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0
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my @prototype = (); |
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0
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0
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my $seen_semicolon = 0; |
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71
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0
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0
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$proto =~ s/_$/;\$/; |
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0
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$proto =~ s/_;/;\$/; |
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0
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0
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while ($proto =~ /\S/) { |
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0
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0
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$n++; |
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0
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0
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0
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if ($seen_semicolon) { |
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0
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push @prototype, [$n, @_]; |
77
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} |
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0
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0
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0
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if ($proto =~ s/^\s*\\([\@%\$\&])//) { |
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0
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0
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push @_, $1 . "{\$_[$n]}"; |
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0
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0
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next; |
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} |
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0
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0
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0
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if ($proto =~ s/^\s*([*\$&])//) { |
83
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0
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0
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push @_, "\$_[$n]"; |
84
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0
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0
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next; |
85
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} |
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0
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0
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0
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if ($proto =~ s/^\s*(;\s*)?\@//) { |
87
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0
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0
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push @_, "\@_[$n..\$#_]"; |
88
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0
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0
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last; |
89
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} |
90
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0
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0
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0
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if ($proto =~ s/^\s*;//) { |
91
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0
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0
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$seen_semicolon = 1; |
92
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0
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0
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$n--; |
93
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0
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0
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next; |
94
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} |
95
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0
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0
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die "Unknown prototype letters: \"$proto\""; |
96
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} |
97
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0
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0
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push @prototype, [$n+1, @_]; |
98
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99
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0
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0
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0
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if (@prototype == 1) { |
100
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0
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0
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my @argv = @{$prototype[0]}; |
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0
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0
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101
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0
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0
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shift @argv; |
102
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0
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0
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local $" = ', '; |
103
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0
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0
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return qq{\tCORE::$function(@argv) || croak "Can't $function(\@_): \$!";}; |
104
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} |
105
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else { |
106
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0
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0
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local @_ = <
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107
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\tif (0) { |
108
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\t} |
109
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END |
110
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0
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0
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while (@prototype) { |
111
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0
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0
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my @argv = @{shift @prototype}; |
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0
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0
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112
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0
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0
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my $n = shift @argv; |
113
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0
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0
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local $" = ', '; |
114
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0
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0
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push @_, <
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115
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\telsif (\@_ == $n) { |
116
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\t\treturn CORE::$function(@argv) || croak "Can't $function(\@_): \$!"; |
117
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\t} |
118
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END |
119
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} |
120
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0
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0
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push @_, qq{\tdie "$function(\@_): Do not expect to get ", scalar \@_, " arguments";}; |
121
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0
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0
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return join '', @_; |
122
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} |
123
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} |
124
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125
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# install Fatal function to package |
126
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sub _install_fatal_function { |
127
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0
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0
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0
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my($function, $package) = @_; |
128
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129
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0
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0
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my $proto = eval { prototype "CORE::$function" }; |
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0
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0
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130
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0
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0
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0
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if ($@) { |
131
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0
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0
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die "$function is not a builtin"; |
132
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} |
133
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0
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0
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0
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if (not defined $proto) { |
134
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0
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0
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die "Cannot install a fatal function since non-overridable builtin"; |
135
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} |
136
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137
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0
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0
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my $code = <
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138
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sub ($proto) { |
139
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\tlocal \$" = ', '; |
140
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\tlocal \$! = 0; |
141
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0
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0
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@{[_fatal_invocation($function,$proto)]} |
142
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} |
143
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144
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END |
145
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{ |
146
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1
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1
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6
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no strict 'refs'; |
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1
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2
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1
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594
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0
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0
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147
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0
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0
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$code = eval "package $package; use Carp; $code"; |
148
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0
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0
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0
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die if $@; |
149
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0
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0
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local $^W = 0; |
150
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0
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0
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*{"${package}::$function"} = $code; |
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0
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0
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151
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} |
152
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} |
153
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154
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# use autodie qw(...); |
155
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sub _autodie { |
156
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0
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0
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0
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require autodie; |
157
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package main; |
158
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0
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0
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autodie::->import( |
159
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qw(read sysread syswrite), # :io |
160
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qw(fileno), # :file |
161
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# nothing # :filesys (excluded: unlink) |
162
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); |
163
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} |
164
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165
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# $SIG{__WARN__}, $SIG{__DIE__} |
166
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sub _SIG { |
167
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168
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# use warnings qw(FATAL all); |
169
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$SIG{__WARN__} = sub { |
170
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171
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# avoid: Use of reserved word "our" is deprecated |
172
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0
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0
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0
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0
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0
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if (($_[0] =~ /^Use of reserved word "our" is deprecated at /) and exists $INC{'Fake/Our.pm'}) { |
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0
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173
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# ignore message |
174
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} |
175
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176
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# ignore wrong warning: Name "main::BAREWORD" used only once |
177
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elsif ($_[0] =~ /Name "main::[A-Za-z_][A-Za-z_0-9]*" used only once:/) { |
178
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0
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0
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0
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if ($] < 5.012) { |
179
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# ignore message |
180
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} |
181
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else { |
182
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0
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0
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$SIG{__DIE__}->(@_); |
183
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} |
184
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} |
185
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else { |
186
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0
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0
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$SIG{__DIE__}->(@_); |
187
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} |
188
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1
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1
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6
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}; |
189
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190
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# HACK #55 Show Source Code on Errors in Chapter 6: Debugging of PERL HACKS |
191
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$SIG{__DIE__} = sub { |
192
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0
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|
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0
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|
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print STDERR __PACKAGE__, ': '; |
193
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0
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0
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print STDERR "$^E\n" if defined($^E); |
194
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0
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print STDERR "$_[0]\n"; |
195
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196
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0
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my $i = 0; |
197
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0
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my @confess = (); |
198
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0
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while (my($package,$filename,$line,$subroutine) = caller($i)) { |
199
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0
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push @confess, [$i,$package,$filename,$line,$subroutine]; |
200
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0
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$i++; |
201
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} |
202
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0
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|
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for my $confess (reverse @confess) { |
203
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0
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my($i,$package,$filename,$line,$subroutine) = @{$confess}; |
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0
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204
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0
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0
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next if $package eq __PACKAGE__; |
205
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0
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0
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next if $package eq 'Carp'; |
206
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207
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0
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|
|
print STDERR "[$i] $subroutine in $filename\n"; |
208
|
0
|
0
|
|
|
|
|
if (open(SCRIPT,$filename)) { |
209
|
0
|
|
|
|
|
|
my @script = (undef, |