From 775477aa1da94cb9fb9b9afdc217231a0cd42ac1 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Tue, 1 May 2007 23:42:44 +0200 Subject: [PATCH] Teach import-tars about GNU tar's @LongLink extension. This extension allows GNU tar to process file names in excess of the 100 characters defined by the original tar standard. It does this by faking a file, named '././@LongLink' containing the true file name, and then adding the file with a truncated name. The idea is that tar without this extension will write out a file with the long file name, and write the contents into a file with truncated name. Unfortunately, GNU tar does a lousy job at times. When truncating results in a _directory_ name, it will happily use _that_ as a truncated name for the file. An example where this actually happens is gcc-4.1.2, where the full path of the file WeThrowThisExceptionHelper.java truncates _exactly_ before the basename. So, we have to support that ad-hoc extension. This bug was noticed by Chris Riddoch on IRC. Signed-off-by: Johannes Schindelin Signed-off-by: Shawn O. Pearce --- contrib/fast-import/import-tars.perl | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/contrib/fast-import/import-tars.perl b/contrib/fast-import/import-tars.perl index 82a90429c8..e46492048c 100755 --- a/contrib/fast-import/import-tars.perl +++ b/contrib/fast-import/import-tars.perl @@ -52,6 +52,25 @@ foreach my $tar_file (@ARGV) Z8 Z1 Z100 Z6 Z2 Z32 Z32 Z8 Z8 Z*', $_; last unless $name; + if ($name eq '././@LongLink') { + # GNU tar extension + if (read(I, $_, 512) != 512) { + die ('Short archive'); + } + $name = unpack 'Z257', $_; + next unless $name; + + my $dummy; + if (read(I, $_, 512) != 512) { + die ('Short archive'); + } + ($dummy, $mode, $uid, $gid, $size, $mtime, + $chksum, $typeflag, $linkname, $magic, + $version, $uname, $gname, $devmajor, $devminor, + $prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12 + Z8 Z1 Z100 Z6 + Z2 Z32 Z32 Z8 Z8 Z*', $_; + } next if $name =~ m{/\z}; $mode = oct $mode; $size = oct $size;