Initial support for for bunzip2....

This code could be improvemed by
 1) supporting more options,
 2) Creating a shared crc table with gunzip, or perhaps generated on the fly.
 3) Removing any remaining unneccessary code (e.g. if (noisy))

Config.h

@@ -13,6 +13,7 @@
 //#define BB_AR
 //#define BB_ASH
 #define BB_BASENAME
+//#define BB_BUNZIP2
 #define BB_CAT
 #define BB_CHGRP
 #define BB_CHMOD

applets.h

@@ -63,6 +63,9 @@
 #endif
 #ifdef BB_BASENAME
 	APPLET(basename, basename_main, _BB_DIR_USR_BIN)
+#endif
+#ifdef BB_BUNZIP2
+	APPLET(bunzip2, bunzip2_main, _BB_DIR_USR_BIN)
 #endif
 	APPLET_NOUSAGE("busybox", busybox_main, _BB_DIR_BIN)
 #ifdef BB_CAT

applets/usage.h

@@ -51,6 +51,12 @@
 	"$ basename /foo/bar.txt .txt\n" \
 	"bar"
 
+#define bunzip2_trivial_usage \
+	"FILE"
+#define bunzip2_full_usage \
+	"Uncompress FILE to current directory, stripping its .bz2 extension.\n"\
+	" -k is assumed" 
+
 #define cat_trivial_usage \
 	"[FILE]..."
 #define cat_full_usage \

include/applets.h

@@ -63,6 +63,9 @@
 #endif
 #ifdef BB_BASENAME
 	APPLET(basename, basename_main, _BB_DIR_USR_BIN)
+#endif
+#ifdef BB_BUNZIP2
+	APPLET(bunzip2, bunzip2_main, _BB_DIR_USR_BIN)
 #endif
 	APPLET_NOUSAGE("busybox", busybox_main, _BB_DIR_BIN)
 #ifdef BB_CAT

include/usage.h

@@ -51,6 +51,12 @@
 	"$ basename /foo/bar.txt .txt\n" \
 	"bar"
 
+#define bunzip2_trivial_usage \
+	"FILE"
+#define bunzip2_full_usage \
+	"Uncompress FILE to current directory, stripping its .bz2 extension.\n"\
+	" -k is assumed" 
+
 #define cat_trivial_usage \
 	"[FILE]..."
 #define cat_full_usage \

usage.h

@@ -51,6 +51,12 @@
 	"$ basename /foo/bar.txt .txt\n" \
 	"bar"
 
+#define bunzip2_trivial_usage \
+	"FILE"
+#define bunzip2_full_usage \
+	"Uncompress FILE to current directory, stripping its .bz2 extension.\n"\
+	" -k is assumed" 
+
 #define cat_trivial_usage \
 	"[FILE]..."
 #define cat_full_usage \