Use pigz for backup

buildroot/.config

@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Buildroot 2015.02-git-00002-g45ffeca-dirty Configuration
+# Buildroot 2015.02-git-00003-gc5dd575-dirty Configuration
 #
 BR2_HAVE_DOT_CONFIG=y
 
@@ -344,6 +344,7 @@ BR2_PACKAGE_PARTCLONE=y
 BR2_PACKAGE_RECOVERY=y
 BR2_PACKAGE_REBOOTP=y
 BR2_PACKAGE_RPI_WIFI_FIRMWARE=y
+BR2_PACKAGE_PIGZ=y
 
 #
 # Audio and video applications

buildroot/package/Config.in

@@ -7,6 +7,7 @@ menu "Target packages"
 	source "package/recovery/Config.in"
 	source "package/rebootp/Config.in"
 	source "package/rpi-wifi-firmware/Config.in"
+	source "package/pigz/Config.in"
 
 menu "Audio and video applications"
 	source "package/alsa-utils/Config.in"

buildroot/package/pigz/Config.in

@@ -0,0 +1,14 @@
+config BR2_PACKAGE_PIGZ
+	bool "pigz"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	select BR2_PACKAGE_ZLIB
+	help
+	  pigz, which stands for parallel implementation of gzip, is a
+	  fully functional replacement for gzip that exploits multiple
+	  processors and multiple cores to the hilt when compressing
+	  data.
+
+	  http://www.zlib.net/pigz/
+
+	comment "pigz needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

buildroot/package/pigz/pigz.mk

@@ -0,0 +1,30 @@
+#############################################################
+#
+# pigz
+#
+#############################################################
+PIGZ_VERSION = 2.4
+PIGZ_SOURCE = pigz-$(PIGZ_VERSION).tar.gz
+PIGZ_SITE = zlib.net/pigz
+#download.freenas.org/distfiles
+PIGZ_CAT = $(ZCAT)
+PIGZ_DIR = $(BUILD_DIR)/pigz-$(PIGZ_VERSION)
+PIGZ_BINARY = pigz
+PIGZ_DEPENDENCIES = zlib
+
+define PIGZ_EXTRACT_CMDS
+	$(ZCAT) $(DL_DIR)/$(PIGZ_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
+endef
+
+define PIGZ_BUILD_CMDS
+	$(MAKE) $(TARGET_CONFIGURE_OPTS) -C $(@D) \
+		CFLAGS="$(TARGET_CFLAGS)" \
+		LDFLAGS="$(TARGET_LDFLAGS)"
+endef
+
+define PIGZ_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/pigz $(TARGET_DIR)/usr/bin/pigz
+	$(STRIPCMD) $(STRIP_STRIP_ALL) $(TARGET_DIR)/usr/bin/pigz
+endef
+
+$(eval $(generic-package))

recovery/backupthread.cpp

@@ -168,7 +168,7 @@ bool BackupThread::processImage(const QVariantMap & entry)
         {
             //   tar gzip
             emit statusUpdate(tr("%1: Archiving (%2)").arg(os_name, QString(label)));
-            cmd = "sh -c \"cd /tmp/src; tar -c . | gzip > "+ backupFolder+"/"+label+".tar.gz\"";
+            cmd = "sh -c \"cd /tmp/src; tar -c . | pigz > "+ backupFolder+"/"+label+".tar.gz\"";
         }
 
         qDebug()<<cmd;