Fixed MTP to work with TWRP

tools/testing/selftests/efivarfs/efivarfs.sh

@@ -0,0 +1,198 @@
+#!/bin/bash
+
+efivarfs_mount=/sys/firmware/efi/efivars
+test_guid=210be57c-9849-4fc7-a635-e6382d1aec27
+
+check_prereqs()
+{
+	local msg="skip all tests:"
+
+	if [ $UID != 0 ]; then
+		echo $msg must be run as root >&2
+		exit 0
+	fi
+
+	if ! grep -q "^\S\+ $efivarfs_mount efivarfs" /proc/mounts; then
+		echo $msg efivarfs is not mounted on $efivarfs_mount >&2
+		exit 0
+	fi
+}
+
+run_test()
+{
+	local test="$1"
+
+	echo "--------------------"
+	echo "running $test"
+	echo "--------------------"
+
+	if [ "$(type -t $test)" = 'function' ]; then
+		( $test )
+	else
+		( ./$test )
+	fi
+
+	if [ $? -ne 0 ]; then
+		echo "  [FAIL]"
+		rc=1
+	else
+		echo "  [PASS]"
+	fi
+}
+
+test_create()
+{
+	local attrs='\x07\x00\x00\x00'
+	local file=$efivarfs_mount/$FUNCNAME-$test_guid
+
+	printf "$attrs\x00" > $file
+
+	if [ ! -e $file ]; then
+		echo "$file couldn't be created" >&2
+		exit 1
+	fi
+
+	if [ $(stat -c %s $file) -ne 5 ]; then
+		echo "$file has invalid size" >&2
+		exit 1
+	fi
+}
+
+test_create_empty()
+{
+	local file=$efivarfs_mount/$FUNCNAME-$test_guid
+
+	: > $file
+
+	if [ ! -e $file ]; then
+		echo "$file can not be created without writing" >&2
+		exit 1
+	fi
+}
+
+test_create_read()
+{
+	local file=$efivarfs_mount/$FUNCNAME-$test_guid
+	./create-read $file
+}
+
+test_delete()
+{
+	local attrs='\x07\x00\x00\x00'
+	local file=$efivarfs_mount/$FUNCNAME-$test_guid
+
+	printf "$attrs\x00" > $file
+
+	if [ ! -e $file ]; then
+		echo "$file couldn't be created" >&2
+		exit 1
+	fi
+
+	rm $file
+
+	if [ -e $file ]; then
+		echo "$file couldn't be deleted" >&2
+		exit 1
+	fi
+
+}
+
+# test that we can remove a variable by issuing a write with only
+# attributes specified
+test_zero_size_delete()
+{
+	local attrs='\x07\x00\x00\x00'
+	local file=$efivarfs_mount/$FUNCNAME-$test_guid
+
+	printf "$attrs\x00" > $file
+
+	if [ ! -e $file ]; then
+		echo "$file does not exist" >&2
+		exit 1
+	fi
+
+	printf "$attrs" > $file
+
+	if [ -e $file ]; then
+		echo "$file should have been deleted" >&2
+		exit 1
+	fi
+}
+
+test_open_unlink()
+{
+	local file=$efivarfs_mount/$FUNCNAME-$test_guid
+	./open-unlink $file
+}
+
+# test that we can create a range of filenames
+test_valid_filenames()
+{
+	local attrs='\x07\x00\x00\x00'
+	local ret=0
+
+	local file_list="abc dump-type0-11-1-1362436005 1234 -"
+	for f in $file_list; do
+		local file=$efivarfs_mount/$f-$test_guid
+
+		printf "$attrs\x00" > $file
+
+		if [ ! -e $file ]; then
+			echo "$file could not be created" >&2
+			ret=1
+		else
+			rm $file
+		fi
+	done
+
+	exit $ret
+}
+
+test_invalid_filenames()
+{
+	local attrs='\x07\x00\x00\x00'
+	local ret=0
+
+	local file_list="
+		-1234-1234-1234-123456789abc
+		foo
+		foo-bar
+		-foo-
+		foo-barbazba-foob-foob-foob-foobarbazfoo
+		foo-------------------------------------
+		-12345678-1234-1234-1234-123456789abc
+		a-12345678=1234-1234-1234-123456789abc
+		a-12345678-1234=1234-1234-123456789abc
+		a-12345678-1234-1234=1234-123456789abc
+		a-12345678-1234-1234-1234=123456789abc
+		1112345678-1234-1234-1234-123456789abc"
+
+	for f in $file_list; do
+		local file=$efivarfs_mount/$f
+
+		printf "$attrs\x00" 2>/dev/null > $file
+
+		if [ -e $file ]; then
+			echo "Creating $file should have failed" >&2
+			rm $file
+			ret=1
+		fi
+	done
+
+	exit $ret
+}
+
+check_prereqs
+
+rc=0
+
+run_test test_create
+run_test test_create_empty
+run_test test_create_read
+run_test test_delete
+run_test test_zero_size_delete
+run_test test_open_unlink
+run_test test_valid_filenames
+run_test test_invalid_filenames
+
+exit $rc