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| 1 | +#!/usr/bin/perl |
| 2 | + |
| 3 | +use strict; |
| 4 | +use warnings; |
| 5 | +use File::Spec::Functions; |
| 6 | + |
| 7 | +sub main(@) { |
| 8 | + foreach my $node (@_) { |
| 9 | + if (!process_node($node)) { |
| 10 | + return 1; |
| 11 | + } |
| 12 | + } |
| 13 | + return 0; |
| 14 | +} |
| 15 | + |
| 16 | +sub process_node($) { |
| 17 | + my $node = shift(); |
| 18 | + if (-f $node) { |
| 19 | + return process_file($node); |
| 20 | + } elsif (-d $node) { |
| 21 | + return process_dir($node); |
| 22 | + } |
| 23 | + return 0; |
| 24 | +} |
| 25 | + |
| 26 | +sub process_dir($) { |
| 27 | + my $dir = shift(); |
| 28 | + if (opendir(DIR, $dir)) { |
| 29 | + if (my @nodes = readdir(DIR)) { |
| 30 | + foreach my $node (no_upwards(@nodes)) { |
| 31 | + if (!process_node(catfile($dir, $node))) { |
| 32 | + return 1; |
| 33 | + } |
| 34 | + } |
| 35 | + } else { |
| 36 | + print STDERR "$dir: could not read directory ($!)\n"; |
| 37 | + return 1; |
| 38 | + } |
| 39 | + closedir(DIR); |
| 40 | + } else { |
| 41 | + print STDERR "$dir: could not open directory ($!)\n"; |
| 42 | + return 1; |
| 43 | + } |
| 44 | + return 0; |
| 45 | +} |
| 46 | + |
| 47 | +sub process_file($) { |
| 48 | + my $file = shift(); |
| 49 | + if (open(FILE, $file)) { |
| 50 | + binmode(FILE); |
| 51 | + my $buffer; |
| 52 | + if (read(FILE, $buffer, 8)) { |
| 53 | + my @fields = unpack('NN', $buffer); |
| 54 | + if ($fields[0] == 0xCAFEBABE) { |
| 55 | + my $minor = ($fields[1] & 0xFF00) >> 16; |
| 56 | + my $major = $fields[1] & 0x00FF; |
| 57 | + my $version = ''; |
| 58 | + if ($major == 45) { |
| 59 | + if ($minor <= 3) { |
| 60 | + $version = '1.0.2'; |
| 61 | + } else { |
| 62 | + $version = '1.1.8'; |
| 63 | + } |
| 64 | + } elsif ($major == 46) { |
| 65 | + $version = '1.2.2'; |
| 66 | + } elsif ($major == 47) { |
| 67 | + $version = '1.3.1'; |
| 68 | + } elsif ($major == 48) { |
| 69 | + $version = '1.4.2'; |
| 70 | + } elsif ($major == 49) { |
| 71 | + $version = '5.0'; |
| 72 | + } elsif ($major == 50) { |
| 73 | + $version = '6.0'; |
| 74 | + } elsif ($major == 51) { |
| 75 | + $version = '7.0'; |
| 76 | + } |
| 77 | + print "$file: Java " . $version . " [" . $minor . "/" . $major . "]\n"; |
| 78 | + } else { |
| 79 | + print "$file: not a java class file\n"; |
| 80 | + } |
| 81 | + } else { |
| 82 | + print STDERR "$file: could not read file ($!)\n"; |
| 83 | + return 1; |
| 84 | + } |
| 85 | + close(FILE); |
| 86 | + } else { |
| 87 | + print STDERR "$file: could not open file ($!)\n"; |
| 88 | + return 1; |
| 89 | + } |
| 90 | + return 0; |
| 91 | +} |
| 92 | + |
| 93 | +exit main(@ARGV); |
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