* io.c (pipe_open): erred program name should be reported by

exceptions, instead of the first argument.

* process.c (rb_spawn): ditto.

* process.c (proc_spawn_v): use first argument as program name.

* win32/win32.c (rb_w32_aspawn): ditto.

* win32/win32.c (CreateChild): search executable file if no program
  name given.

* lib/drb/extservm.rb (invoke_service_command): use Process.spawn.
  [ruby-dev:23103]

* lib/rdoc/ri/ri_display.rb (setup_pager): use IO.popen.
  [ruby-dev:23086], [ruby-dev:23103]

* lib/rdoc/diagram.rb (convert_to_png): ditto.

* lib/rdoc/generators/chm_generator.rb (compile_project): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5872 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/ri/ri_display.rb

@@ -196,10 +196,17 @@ class  DefaultDisplay
 
   def setup_pager
     unless @options.use_stdout
-      require 'tempfile'
-
-      @save_stdout = STDOUT.clone
-      STDOUT.reopen(Tempfile.new("ri_"))
+      for pager in [ ENV['PAGER'], "less", "more", 'pager' ].compact.uniq
+        begin
+          pager = IO.popen(pager, "w")
+        rescue
+        else
+          @save_stdout = STDOUT.clone
+          STDOUT.reopen(pager)
+          return
+        end
+      end
+      @options.use_stdout = true
     end
   end
 
@@ -207,20 +214,8 @@ class  DefaultDisplay
 
   def page_output
     unless @options.use_stdout
-      path = STDOUT.path
       STDOUT.reopen(@save_stdout)
       @save_stdout = nil
-      paged = false
-      for pager in [ ENV['PAGER'], "less", "more <", 'pager' ].compact.uniq
-        if system("#{pager} #{path}")
-          paged = true
-          break
-        end
-      end
-      if !paged
-        @options.use_stdout = true
-        puts File.read(path)
-      end
     end
   end