scripts/download.pl

   1 #!/usr/bin/perl
   2 #
   3 # Copyright (C) 2006 OpenWrt.org
   4 #
   5 # This is free software, licensed under the GNU General Public License v2.
   6 # See /LICENSE for more information.
   7 #
   8
   9 use strict;
  10 use warnings;
  11 use File::Basename;
  12
  13 @ARGV > 2 or die "Syntax: $0 <target dir> <filename> <md5sum> [<mirror> ...]\n";
  14
  15 my $target = shift @ARGV;
  16 my $filename = shift @ARGV;
  17 my $md5sum = shift @ARGV;
  18 my $scriptdir = dirname($0);
  19 my @mirrors;
  20 my $ok;
  21
  22 sub localmirrors {
  23         my @mlist;
  24         open LM, "$scriptdir/localmirrors" and do {
  25             while (<LM>) {
  26                         chomp $_;
  27                         push @mlist, $_;
  28                 }
  29                 close LM;
  30         };
  31         open CONFIG, "<".$ENV{'TOPDIR'}."/.config" and do {
  32                 while (<CONFIG>) {
  33                         /^CONFIG_LOCALMIRROR="(.+)"/ and do {
  34                                 chomp;
  35                                 push @mlist, $1;
  36                         };
  37                 }
  38                 close CONFIG;
  39         };
  40
  41         return @mlist;
  42 }
  43
  44 sub which($) {
  45         my $prog = shift;
  46         my $res = `which $prog`;
  47         $res or return undef;
  48         $res =~ /^no / and return undef;
  49         $res =~ /not found/ and return undef;
  50         return $res;
  51 }
  52
  53 my $md5cmd = which("md5sum");
  54 $md5cmd or $md5cmd = which("md5");
  55 $md5cmd or die 'no md5 checksum program found, please install md5 or md5sum';
  56 chomp $md5cmd;
  57
  58 sub download
  59 {
  60         my $mirror = shift;
  61         my $options = $ENV{WGET_OPTIONS};
  62         $options or $options = "";
  63
  64         $mirror =~ s/\/$//;
  65         if( $mirror =~ /^file:\/\// ) {
  66                 my $cache = $mirror;
  67                 $cache =~ s/file:\/\///g;
  68                 print "Checking local cache: $cache\n";
  69                 system("mkdir -p $target/");
  70                 system("cp -f $cache/$filename $target/$filename.dl") == 0 or return;
  71                 system("$md5cmd $target/$filename.dl > \"$target/$filename.md5sum\" ") == 0 or return;
  72         } else {
  73                 open WGET, "wget -t5 --timeout=20 $options -O- \"$mirror/$filename\" |" or die "Cannot launch wget.\n";
  74                 open MD5SUM, "| $md5cmd > \"$target/$filename.md5sum\"" or die "Cannot launch md5sum.\n";
  75                 open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
  76                 my $buffer;
  77                 while (read WGET, $buffer, 1048576) {
  78                         print MD5SUM $buffer;
  79                         print OUTPUT $buffer;
  80                 }
  81                 close MD5SUM;
  82                 close WGET;
  83                 close OUTPUT;
  84
  85                 if (($? >> 8) != 0 ) {
  86                         print STDERR "Download failed.\n";
  87                         cleanup();
  88                         return;
  89                 }
  90         }
  91
  92         my $sum = `cat "$target/$filename.md5sum"`;
  93         $sum =~ /^(\w+)\s*/ or die "Could not generate md5sum\n";
  94         $sum = $1;
  95
  96         if (($md5sum =~ /\w{32}/) and ($sum ne $md5sum)) {
  97                 print STDERR "MD5 sum of the downloaded file does not match (file: $sum, requested: $md5sum) - deleting download.\n";
  98                 cleanup();
  99                 return;
 100         }
 101
 102         unlink "$target/$filename";
 103         system("mv \"$target/$filename.dl\" \"$target/$filename\"");
 104         cleanup();
 105 }
 106
 107 sub cleanup
 108 {
 109         unlink "$target/$filename.dl";
 110         unlink "$target/$filename.md5sum";
 111 }
 112
 113 @mirrors = localmirrors();
 114
 115 foreach my $mirror (@ARGV) {
 116         if ($mirror =~ /^\@SF\/(.+)$/) {
 117                 # give sourceforge a few more tries, because it redirects to different mirrors
 118                 for (1 .. 5) {
 119                         push @mirrors, "http://downloads.sourceforge.net/$1";
 120                 }
 121         } elsif ($mirror =~ /^\@GNU\/(.+)$/) {
 122                 push @mirrors, "ftp://ftp.gnu.org/gnu/$1";
 123                 push @mirrors, "ftp://ftp.belnet.be/mirror/ftp.gnu.org/gnu/$1";
 124                 push @mirrors, "ftp://ftp.mirror.nl/pub/mirror/gnu/$1";
 125                 push @mirrors, "http://mirror.switch.ch/ftp/mirror/gnu/$1";
 126                 push @mirrors, "ftp://ftp.uu.net/archive/systems/gnu/$1";
 127                 push @mirrors, "ftp://ftp.eu.uu.net/pub/gnu/$1";
 128                 push @mirrors, "ftp://ftp.leo.org/pub/comp/os/unix/gnu/$1";
 129                 push @mirrors, "ftp://ftp.digex.net/pub/gnu/$1";
 130         } elsif ($mirror =~ /^\@KERNEL\/(.+)$/) {
 131                 push @mirrors, "ftp://ftp.us.kernel.org/pub/$1";
 132                 push @mirrors, "http://ftp.us.kernel.org/pub/$1";
 133                 push @mirrors, "ftp://ftp.kernel.org/pub/$1";
 134                 push @mirrors, "http://ftp.kernel.org/pub/$1";
 135                 push @mirrors, "ftp://ftp.de.kernel.org/pub/$1";
 136                 push @mirrors, "http://ftp.de.kernel.org/pub/$1";
 137                 push @mirrors, "ftp://ftp.fr.kernel.org/pub/$1";
 138                 push @mirrors, "http://ftp.fr.kernel.org/pub/$1";
 139         } else {
 140                 push @mirrors, $mirror;
 141         }
 142 }
 143
 144 #push @mirrors, 'http://mirror1.openwrt.org';
 145 push @mirrors, 'http://mirror2.openwrt.org/sources';
 146 push @mirrors, 'http://downloads.openwrt.org/sources';
 147
 148 while (!$ok) {
 149         my $mirror = shift @mirrors;
 150         $mirror or die "No more mirrors to try - giving up.\n";
 151
 152         download($mirror);
 153         -f "$target/$filename" and $ok = 1;
 154 }
 155
 156 $SIG{INT} = \&cleanup;
 157