Merge branch 'master' of https://github.com/pali/util-linux

* 'master' of https://github.com/pali/util-linux:
  tests: Add UDF hdd image with emoji label created by mkudffs 2.2
  libblkid: Fix UTF-16 support in function blkid_encode_to_utf8()

libblkid/src/encode.c

@@ -237,7 +237,8 @@ size_t blkid_encode_to_utf8(int enc, unsigned char *dest, size_t len,
 			const unsigned char *src, size_t count)
 {
 	size_t i, j;
-	uint16_t c;
+	uint32_t c;
+	uint16_t c2;
 
 	for (j = i = 0; i < count; i++) {
 		if (enc == BLKID_ENC_UTF16LE) {
@@ -255,6 +256,17 @@ size_t blkid_encode_to_utf8(int enc, unsigned char *dest, size_t len,
 		} else {
 			return 0;
 		}
+		if ((enc == BLKID_ENC_UTF16LE || enc == BLKID_ENC_UTF16BE) &&
+		    c >= 0xD800 && c <= 0xDBFF && i+2 < count) {
+			if (enc == BLKID_ENC_UTF16LE)
+				c2 = (src[i+2] << 8) | src[i+1];
+			else
+				c2 = (src[i+1] << 8) | src[i+2];
+			if (c2 >= 0xDC00 && c2 <= 0xDFFF) {
+				c = 0x10000 + ((c - 0xD800) << 10) + (c2 - 0xDC00);
+				i += 2;
+			}
+		}
 		if (c == 0) {
 			dest[j] = '\0';
 			break;
@@ -267,12 +279,19 @@ size_t blkid_encode_to_utf8(int enc, unsigned char *dest, size_t len,
 				break;
 			dest[j++] = (uint8_t) (0xc0 | (c >> 6));
 			dest[j++] = (uint8_t) (0x80 | (c & 0x3f));
-		} else {
+		} else if (c < 0x10000) {
 			if (j+3 >= len)
 				break;
 			dest[j++] = (uint8_t) (0xe0 | (c >> 12));
 			dest[j++] = (uint8_t) (0x80 | ((c >> 6) & 0x3f));
 			dest[j++] = (uint8_t) (0x80 | (c & 0x3f));
+		} else {
+			if (j+4 >= len)
+				break;
+			dest[j++] = (uint8_t) (0xf0 | (c >> 18));
+			dest[j++] = (uint8_t) (0x80 | ((c >> 12) & 0x3f));
+			dest[j++] = (uint8_t) (0x80 | ((c >> 6) & 0x3f));
+			dest[j++] = (uint8_t) (0x80 | (c & 0x3f));
 		}
 	}
 	dest[j] = '\0';

tests/expected/blkid/low-probe-udf-hdd-mkudffs-2.2

@@ -0,0 +1,11 @@
+ID_FS_BLOCK_SIZE=512
+ID_FS_LABEL=😀
+ID_FS_LABEL_ENC=😀
+ID_FS_LOGICAL_VOLUME_ID=😀
+ID_FS_TYPE=udf
+ID_FS_USAGE=filesystem
+ID_FS_UUID=5e3d6e3fee58c271
+ID_FS_UUID_ENC=5e3d6e3fee58c271
+ID_FS_VERSION=2.01
+ID_FS_VOLUME_ID=😀
+ID_FS_VOLUME_SET_ID=5e3d6e3fee58c271LinuxUDF