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1 | package Archive::Tar::Constant; |
2 | |
3 | BEGIN { |
4 | require Exporter; |
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5 | |
6 | $VERSION = '0.02'; |
7 | @ISA = qw[Exporter]; |
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8 | |
9 | require Time::Local if $^O eq "MacOS"; |
10 | } |
11 | |
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12 | use Package::Constants; |
13 | @EXPORT = Package::Constants->list( __PACKAGE__ ); |
14 | |
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15 | use constant FILE => 0; |
16 | use constant HARDLINK => 1; |
17 | use constant SYMLINK => 2; |
18 | use constant CHARDEV => 3; |
19 | use constant BLOCKDEV => 4; |
20 | use constant DIR => 5; |
21 | use constant FIFO => 6; |
22 | use constant SOCKET => 8; |
23 | use constant UNKNOWN => 9; |
24 | use constant LONGLINK => 'L'; |
25 | use constant LABEL => 'V'; |
26 | |
27 | use constant BUFFER => 4096; |
28 | use constant HEAD => 512; |
29 | use constant BLOCK => 512; |
30 | |
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31 | use constant COMPRESS_GZIP => 9; |
32 | use constant COMPRESS_BZIP => 'bzip2'; |
33 | |
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34 | use constant BLOCK_SIZE => sub { my $n = int($_[0]/BLOCK); $n++ if $_[0] % BLOCK; $n * BLOCK }; |
35 | use constant TAR_PAD => sub { my $x = shift || return; return "\0" x (BLOCK - ($x % BLOCK) ) }; |
36 | use constant TAR_END => "\0" x BLOCK; |
37 | |
38 | use constant READ_ONLY => sub { shift() ? 'rb' : 'r' }; |
39 | use constant WRITE_ONLY => sub { $_[0] ? 'wb' . shift : 'w' }; |
40 | use constant MODE_READ => sub { $_[0] =~ /^r/ ? 1 : 0 }; |
41 | |
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42 | # Pointless assignment to make -w shut up |
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43 | my $getpwuid; $getpwuid = 'unknown' unless eval { my $f = getpwuid (0); }; |
44 | my $getgrgid; $getgrgid = 'unknown' unless eval { my $f = getgrgid (0); }; |
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45 | use constant UNAME => sub { $getpwuid || scalar getpwuid( shift() ) || '' }; |
46 | use constant GNAME => sub { $getgrgid || scalar getgrgid( shift() ) || '' }; |
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47 | use constant UID => $>; |
48 | use constant GID => (split ' ', $) )[0]; |
49 | |
50 | use constant MODE => do { 0666 & (0777 & ~umask) }; |
51 | use constant STRIP_MODE => sub { shift() & 0777 }; |
52 | use constant CHECK_SUM => " "; |
53 | |
54 | use constant UNPACK => 'A100 A8 A8 A8 A12 A12 A8 A1 A100 A6 A2 A32 A32 A8 A8 A155 x12'; |
55 | use constant PACK => 'a100 a8 a8 a8 a12 a12 A8 a1 a100 a6 a2 a32 a32 a8 a8 a155 x12'; |
56 | use constant NAME_LENGTH => 100; |
57 | use constant PREFIX_LENGTH => 155; |
58 | |
59 | use constant TIME_OFFSET => ($^O eq "MacOS") ? Time::Local::timelocal(0,0,0,1,0,70) : 0; |
60 | use constant MAGIC => "ustar"; |
61 | use constant TAR_VERSION => "00"; |
62 | use constant LONGLINK_NAME => '././@LongLink'; |
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63 | use constant PAX_HEADER => 'pax_global_header'; |
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64 | |
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65 | ### allow ZLIB to be turned off using ENV: DEBUG only |
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66 | use constant ZLIB => do { !$ENV{'PERL5_AT_NO_ZLIB'} and |
67 | eval { require IO::Zlib }; |
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68 | $ENV{'PERL5_AT_NO_ZLIB'} || $@ ? 0 : 1 |
69 | }; |
70 | |
71 | ### allow BZIP to be turned off using ENV: DEBUG only |
72 | use constant BZIP => do { !$ENV{'PERL5_AT_NO_BZIP'} and |
73 | eval { require IO::Uncompress::Bunzip2; |
74 | require IO::Compress::Bzip2; }; |
75 | $ENV{'PERL5_AT_NO_BZIP'} || $@ ? 0 : 1 |
76 | }; |
77 | |
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78 | use constant GZIP_MAGIC_NUM => qr/^(?:\037\213|\037\235)/; |
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79 | use constant BZIP_MAGIC_NUM => qr/^BZh\d/; |
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80 | |
81 | use constant CAN_CHOWN => do { ($> == 0 and $^O ne "MacOS" and $^O ne "MSWin32") }; |
82 | use constant CAN_READLINK => ($^O ne 'MSWin32' and $^O !~ /RISC(?:[ _])?OS/i and $^O ne 'VMS'); |
83 | use constant ON_UNIX => ($^O ne 'MSWin32' and $^O ne 'MacOS' and $^O ne 'VMS'); |
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84 | use constant ON_VMS => $^O eq 'VMS'; |
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85 | |
86 | 1; |