[gparted] Added auto detection of Linux software RAID devices

[Curtis Gedak <gedakc src gnome org>]

commit 1607d13a069574de3f6bde625ce3f94c1147aecd
Author: Curtis Gedak <gedakc gmail com>
Date:   Tue Nov 3 13:25:40 2009 -0700

    Added auto detection of Linux software RAID devices
    
    Auto detection of Linux software RAID devices was lost in GParted
    0.3.8.  This was because device scanning by the libparted device
    call ped_device_probe_all() was replaced with custom code within
    GParted to scan /proc/partitions for devices.
    
    The reason the libparted call was replaced was due to a long
    scanning problem with ped_device_probe_all(), a non-existent
    physical floppy device, and a BIOS setting indicating a floppy
    drive existed.  See bug #351753:
    https://bugzilla.gnome.org/show_bug.cgi?id=351753

 include/Makefile.am |    1 +
 include/SWRaid.h    |   55 +++++++++++++++++++++++++++
 src/GParted_Core.cc |   12 ++++++
 src/Makefile.am     |    1 +
 src/SWRaid.cc       |  104 +++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 173 insertions(+), 0 deletions(-)
---
diff --git a/include/Makefile.am b/include/Makefile.am
index 294cbf1..4317b2f 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -30,6 +30,7 @@ EXTRA_DIST = \
 	OperationResizeMove.h		\
 	OperationLabelPartition.h	\
 	Partition.h  			\
+	SWRaid.h				\
 	TreeView_Detail.h 		\
 	Utils.h 			\
 	Win_GParted.h 			\
diff --git a/include/SWRaid.h b/include/SWRaid.h
new file mode 100644
index 0000000..4d74d07
--- /dev/null
+++ b/include/SWRaid.h
@@ -0,0 +1,55 @@
+/* Copyright (C) 2009 Curtis Gedak
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/* READ THIS!
+ * This class was created in an effort to reduce the complexity of the
+ * GParted_Core class.
+ * This class provides support for Linux software RAID devices (mdadm).
+ * Static elements are used in order to reduce the disk accesses required to
+ * load the data structures upon each initialization of the class.
+ */
+
+#ifndef SWRAID_H_
+#define SWRAID_H_
+
+#include "../include/Utils.h"
+
+#include <vector>
+
+namespace GParted
+{
+
+
+class SWRaid
+{
+public:
+	SWRaid() ;
+	SWRaid( const bool & do_refresh ) ;
+	~SWRaid() ;
+	bool is_swraid_supported() ;
+	void get_devices( std::vector<Glib::ustring> & swraid_devices ) ;
+private:
+	void load_swraid_cache() ;
+	void set_commands_found() ;
+	static bool swraid_cache_initialized ;
+	static bool mdadm_found ;
+	static std::vector<Glib::ustring> swraid_devices ;
+};
+
+}//GParted
+
+#endif /* SWRAID_H_ */
diff --git a/src/GParted_Core.cc b/src/GParted_Core.cc
index 5506aa7..15fd0d3 100644
--- a/src/GParted_Core.cc
+++ b/src/GParted_Core.cc
@@ -18,6 +18,7 @@
 #include "../include/Win_GParted.h"
 #include "../include/GParted_Core.h"
 #include "../include/DMRaid.h"
+#include "../include/SWRaid.h"
 #include "../include/FS_Info.h"
 #include "../include/OperationCopy.h"
 #include "../include/OperationCreate.h"
@@ -160,6 +161,7 @@ void GParted_Core::set_devices( std::vector<Device> & devices )
 	Device temp_device ;
 	FS_Info fs_info( true ) ;  //Refresh cache of file system information
 	DMRaid dmraid( true ) ;    //Refresh cache of dmraid device information
+	SWRaid swraid( true ) ;    //Refresh cache of swraid device information
 	
 	init_maps() ;
 	
@@ -204,6 +206,16 @@ void GParted_Core::set_devices( std::vector<Device> & devices )
 			}
 			proc_partitions .close() ;
 
+			//Try to find all swraid devices
+			if (swraid .is_swraid_supported() ) {
+				std::vector<Glib::ustring> swraid_devices ;
+				swraid .get_devices( swraid_devices ) ;
+				for ( unsigned int k=0; k < swraid_devices .size(); k++ ) {
+					set_thread_status_message( String::ucompose ( _("Scanning %1"), swraid_devices[k] ) ) ;
+					ped_device_get( swraid_devices[k] .c_str() ) ;
+				}
+			}
+
 			//Try to find all dmraid devices
 			if (dmraid .is_dmraid_supported() ) {
 				std::vector<Glib::ustring> dmraid_devices ;
diff --git a/src/Makefile.am b/src/Makefile.am
index 28900ef..d4b6f6d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -39,6 +39,7 @@ gpartedbin_SOURCES = \
 	OperationResizeMove.cc		\
 	OperationLabelPartition.cc	\
 	Partition.cc			\
+	SWRaid.cc				\
 	TreeView_Detail.cc		\
 	Utils.cc			\
 	Win_GParted.cc			\
diff --git a/src/SWRaid.cc b/src/SWRaid.cc
new file mode 100644
index 0000000..29c9b40
--- /dev/null
+++ b/src/SWRaid.cc
@@ -0,0 +1,104 @@
+/* Copyright (C) 2009 Curtis Gedak
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "../include/SWRaid.h"
+
+namespace GParted
+{
+
+//Initialize static data elements
+bool SWRaid::swraid_cache_initialized = false ;
+bool SWRaid::mdadm_found  = false ;
+std::vector<Glib::ustring> SWRaid::swraid_devices ;
+
+SWRaid::SWRaid()
+{
+	//Ensure that cache has been loaded at least once
+	if ( ! swraid_cache_initialized )
+	{
+		swraid_cache_initialized = true ;
+		set_commands_found() ;
+		load_swraid_cache() ;
+	}
+}
+
+SWRaid::SWRaid( const bool & do_refresh )
+{
+	//Ensure that cache has been loaded at least once
+	if ( ! swraid_cache_initialized )
+	{
+		swraid_cache_initialized = true ;
+		set_commands_found() ;
+		if ( do_refresh == false )
+			load_swraid_cache() ;
+	}
+
+	if ( do_refresh )
+		load_swraid_cache() ;
+}
+
+SWRaid::~SWRaid()
+{
+}
+
+void SWRaid::load_swraid_cache()
+{
+	//Load data into swraid structures
+	Glib::ustring output, error ;
+	swraid_devices .clear() ;
+
+	if ( mdadm_found )
+	{
+		if ( ! Utils::execute_command( "mdadm --examine --scan", output, error, true ) )
+		{
+			if ( output .size() > 0 )
+			{
+				std::vector<Glib::ustring> temp_arr ;
+				Utils::tokenize( output, temp_arr, "\n" ) ;
+				for ( unsigned int k = 0; k < temp_arr .size(); k++ )
+				{
+					Glib::ustring temp = Utils::regexp_label( output, "^[^/]*(/dev/[^\t ]*)" ) ;
+					if ( temp .size() > 0 )
+						swraid_devices .push_back( temp ) ;
+				}
+			}
+		}
+	}
+}
+
+void SWRaid::set_commands_found()
+{
+	//Set status of commands found 
+	mdadm_found = (! Glib::find_program_in_path( "mdadm" ) .empty() ) ;
+}
+
+bool SWRaid::is_swraid_supported()
+{
+	//Determine if Linux software RAID is supported
+	return ( mdadm_found ) ;
+}
+
+void SWRaid::get_devices( std::vector<Glib::ustring> & device_list )
+{
+	//Retrieve list of Linux software RAID devices
+	device_list .clear() ;
+
+	for ( unsigned int k=0; k < swraid_devices .size(); k++ )
+		device_list .push_back( swraid_devices[k] ) ;
+}
+
+}//GParted