Failed to load short filename in FAT12

[LeavaTail]

Describe the bug

• Failed to load short filename in FAT12

To Reproduce make check and cat tests/02_simple_inetractive_check.sh.log

Expected behavior

Welcome to debugfatfs 0.1 (Interactive Mode)

/> cd 00_SIMPLE
'00_SIMPLE': No such file or directory.
/> ls
-HSD-        0 2020-09-13 15:49:29 System Volume Information 
---DA        0 2020-09-13 15:49:40 03_DELETE 
---DA        0 2020-09-13 15:49:40 00_SIMPLE 
---DA        0 2020-09-13 15:49:40 01_LONGNAME 
---DA        0 2020-09-13 15:49:40 02_UNICODE 

/> cd /01_LONGNAME
/01_LONGNAME/> ls
---D-        0 2020-09-13 15:49:40 .           
---D-        0 2020-09-13 15:49:40 ..          
----A        6 2020-09-13 15:49:40 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
----A        6 2020-09-13 15:49:40 あああああああああああああああああああああああああああああああああああああああああああああああああああああああああああああ

/01_LONGNAME/> cd /02_UNICODE
/02_UNICODE/> ls
---D-        0 2020-09-13 15:49:40 .           
---D-        0 2020-09-13 15:49:40 ..          
----A        0 2020-09-13 15:49:40 ABCDEFGHIJKLMNOPQRSTUVWXYZ! 
----A        0 2020-09-13 15:49:40 ¼ 
----A        0 2020-09-13 15:49:40 Ō 
----A        0 2020-09-13 15:49:40 あいうえお 

/02_UNICODE/> cd /03_DELETE
/03_DELETE/> ls
---D-        0 2020-09-13 15:49:40 .           
---D-        0 2020-09-13 15:49:40 ..          
----A        0 2020-09-13 15:49:40 FILE    .TXT 
----A        0 2020-09-13 15:49:40 FILE4__________________________________________________________________________________________________.txt 
----A        0 2020-09-13 15:49:40 FILE6   .TXT 

Screenshots

spawn ./debugfatfs -iq fat12.img
Welcome to debugfatfs 0.1 (Interactive Mode)

/> cd 00_SIMPLE
'00_SIMPLE': No such file or directory.
/> ls
-HSD-        0 2020-09-13 07:36:17 System Volume Information 
---DA        0 2020-09-13 07:36:55 00_SIMPLE 
---DA        0 2020-09-13 07:36:55 01_LONGNAME 
---DA        0 2020-09-13 07:36:55 02_UNICODE 
---DA        0 2020-09-13 07:36:55 03_DELETE 

/> cd /01_LONGNAME
/01_LONGNAME/> ls

/01_LONGNAME/> cd /02_UNICODE
/02_UNICODE/> ls
-----  3407917 1980-01-17 00:01:38 { 
-----  3670083 1980-01-13 00:01:50 F 
-----        0 1980-00-00 00:00:00 0 

/02_UNICODE/> cd /03_DELETE
/03_DELETE/> ls
---D-        0 2020-09-13 07:36:55 .           
---D-        0 2020-09-13 07:36:55 ..          
----A       19 2020-09-13 07:36:55 FILE    .TXT 
---DA        0 2020-09-13 07:36:55 DIR         

/03_DELETE/> spawn ./debugfatfs -iq fat16.img
Welcome to debugfatfs 0.1 (Interactive Mode)