archive-tar-minitar-0.5.3-pipes.patch

Index: minitar-0.5.3/lib/archive/tar/minitar.rb
===================================================================
--- minitar-0.5.3.orig/lib/archive/tar/minitar.rb
+++ minitar-0.5.3/lib/archive/tar/minitar.rb
@@ -486,7 +486,11 @@ module Archive::Tar::Minitar
         @devminor = header.devminor
         @prefix   = header.prefix
         @read     = 0
-        @orig_pos = @io.pos
+        begin
+          @orig_pos = @io.pos
+        rescue Errno::ESPIPE
+          @orig_pos = 0
+        end
       end
 
         # Reads +len+ bytes (or all remaining data) from the entry. Returns
@@ -585,7 +589,11 @@ module Archive::Tar::Minitar
       # Creates and returns a new Reader object.
     def initialize(anIO)
       @io     = anIO
-      @init_pos = anIO.pos
+      begin
+        @init_pos = @io.pos
+      rescue Errno::ESPIPE
+        @init_pos = 0
+      end
     end
 
       # Iterates through each entry in the data stream.
@@ -621,10 +629,10 @@ module Archive::Tar::Minitar
 
         skip = (512 - (size % 512)) % 512
 
-        if @io.respond_to?(:seek)
-            # avoid reading...
+        begin
+          # avoid reading...
           @io.seek(size - entry.bytes_read, IO::SEEK_CUR)
-        else
+        rescue Errno::ESPIPE, NoMethodError
           pending = size - entry.bytes_read
           while pending > 0
             bread = @io.read([pending, 4096].min).size