From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/lib/shell/system-command.rb | 158 +++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 jni/ruby/lib/shell/system-command.rb

(limited to 'jni/ruby/lib/shell/system-command.rb')

diff --git a/jni/ruby/lib/shell/system-command.rb b/jni/ruby/lib/shell/system-command.rb
new file mode 100644
index 0000000..382a337
--- /dev/null
+++ b/jni/ruby/lib/shell/system-command.rb
@@ -0,0 +1,158 @@
+#
+#   shell/system-command.rb -
+#       $Release Version: 0.7 $
+#       $Revision: 46969 $
+#       by Keiju ISHITSUKA(keiju@ruby-lang.org)
+#
+# --
+#
+#
+#
+
+require "shell/filter"
+
+class Shell
+  class SystemCommand < Filter
+    def initialize(sh, command, *opts)
+      if t = opts.find{|opt| !opt.kind_of?(String) && opt.class}
+        Shell.Fail Error::TypeError, t.class, "String"
+      end
+      super(sh)
+      @command = command
+      @opts = opts
+
+      @input_queue = Queue.new
+      @pid = nil
+
+      sh.process_controller.add_schedule(self)
+    end
+
+    attr_reader :command
+    alias name command
+
+    def wait?
+      @shell.process_controller.waiting_job?(self)
+    end
+
+    def active?
+      @shell.process_controller.active_job?(self)
+    end
+
+    def input=(inp)
+      super
+      if active?
+        start_export
+      end
+    end
+
+    def start
+      notify([@command, *@opts].join(" "))
+
+      @pid, @pipe_in, @pipe_out = @shell.process_controller.sfork(self) {
+        Dir.chdir @shell.pwd
+        $0 = @command
+        exec(@command, *@opts)
+      }
+      if @input
+        start_export
+      end
+      start_import
+    end
+
+    def flush
+      @pipe_out.flush if @pipe_out and !@pipe_out.closed?
+    end
+
+    def terminate
+      begin
+        @pipe_in.close
+      rescue IOError
+      end
+      begin
+        @pipe_out.close
+      rescue IOError
+      end
+    end
+
+    def kill(sig)
+      if @pid
+        Process.kill(sig, @pid)
+      end
+    end
+
+    def start_import
+      notify "Job(%id) start imp-pipe.", @shell.debug?
+      _eop = true
+      Thread.start {
+        begin
+          while l = @pipe_in.gets
+            @input_queue.push l
+          end
+          _eop = false
+        rescue Errno::EPIPE
+          _eop = false
+        ensure
+          if !ProcessController::USING_AT_EXIT_WHEN_PROCESS_EXIT and _eop
+            notify("warn: Process finishing...",
+                   "wait for Job[%id] to finish pipe importing.",
+                   "You can use Shell#transact or Shell#check_point for more safe execution.")
+            redo
+          end
+          notify "job(%id}) close imp-pipe.", @shell.debug?
+          @input_queue.push :EOF
+          @pipe_in.close
+        end
+      }
+    end
+
+    def start_export
+      notify "job(%id) start exp-pipe.", @shell.debug?
+      _eop = true
+      Thread.start{
+        begin
+          @input.each do |l|
+            ProcessController::block_output_synchronize do
+              @pipe_out.print l
+            end
+          end
+          _eop = false
+        rescue Errno::EPIPE, Errno::EIO
+          _eop = false
+        ensure
+          if !ProcessController::USING_AT_EXIT_WHEN_PROCESS_EXIT and _eop
+            notify("shell: warn: Process finishing...",
+                   "wait for Job(%id) to finish pipe exporting.",
+                   "You can use Shell#transact or Shell#check_point for more safe execution.")
+            redo
+          end
+          notify "job(%id) close exp-pipe.", @shell.debug?
+          @pipe_out.close
+        end
+      }
+    end
+
+    alias super_each each
+    def each(rs = nil)
+      while (l = @input_queue.pop) != :EOF
+        yield l
+      end
+    end
+
+    # ex)
+    #    if you wish to output:
+    #       "shell: job(#{@command}:#{@pid}) close pipe-out."
+    #    then
+    #       mes: "job(%id) close pipe-out."
+    #    yorn: Boolean(@shell.debug? or @shell.verbose?)
+    def notify(*opts)
+      @shell.notify(*opts) do |mes|
+        yield mes if iterator?
+
+        mes.gsub!("%id", "#{@command}:##{@pid}")
+        mes.gsub!("%name", "#{@command}")
+        mes.gsub!("%pid", "#{@pid}")
+        mes
+      end
+    end
+  end
+end
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