Function at 0x42215e
Capabilities:
Check if file exists
Unmount volume via ioctl

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x1c
push ebx
push esi
push edi
mov edi, dword [ebp + 0xc]
test edi, edi
jne 0x4221b7
push 0xc0000000
push dword [ebp + 8]
call dword [0x51912c]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x4222cd
push SysReAllocStringLen
push dword [ebp + 8]
call dword [0x51912c]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x4222cd
call dword [sym.imp.KERNEL32.dll_GetLastError]
cmp eax, 2
jne 0x4222bb
xor eax, eax
inc eax
jmp 0x422339
mov esi, dword [sym.imp.KERNEL32.dll_lstrlenW]
push edi
call esi
cmp eax, 2
jne 0x4221d1
xor eax, eax
cmp word [edi + 2], 0x3a
sete al
jmp 0x4221f2
push edi
call esi
cmp eax, 3
jne 0x4221f0
lea eax, [edi + 2]
push 0x4f0f70
push eax
call fcn.004af242
neg eax
pop ecx
sbb eax, eax
pop ecx
inc eax
jmp 0x4221f2
xor eax, eax
test eax, eax
je 0x422255
mov eax, dword [ebp + 0xc]
mov ax, word [eax]
mov esi, str.._:
lea edi, [ebp - 0x1c]
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
push 0
movsw word es:[edi], word [esi]
mov esi, dword [sym.imp.KERNEL32.dll_CreateFileW]
mov edi, 0x20000000
push edi
push 3
push 0
push 3
mov word [ebp - 0x14], ax
push 0xc0000000
lea eax, [ebp - 0x1c]
push eax
call esi
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x4222ca
push 0
push edi
push 3
push 0
push 3
push SysReAllocStringLen
lea eax, [ebp - 0x1c]
push eax
call esi
mov edi, dword [ebp + 0xc]
mov ebx, eax
jmp 0x422197
push 0xc0000000
push edi
call dword [0x519130]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x4222cd
push SysReAllocStringLen
push edi
call dword [0x519130]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x4222cd
call dword [sym.imp.KERNEL32.dll_GetLastError]
dec eax
je 0x4222b6
sub eax, 0x56
je 0x4222b6
sub eax, 0x3a
je 0x4222a3
sub eax, 0x7a
je 0x4222a3
sub eax, 0x101b
je 0x4222a3
push edi
call fcn.00420ed4
pop ecx
jmp 0x4222b6
push edi
push str.Not_a_mount_point:__1_ws__n
push 0x516ba0
call fcn.00420e78
add esp, 0xc
push 9
pop eax
jmp 0x422339
push str.Error_opening_device:
call fcn.00420ed4
pop ecx
push 2
jmp 0x4222b8
mov edi, dword [ebp + 0xc]
push ebx
call fcn.00420f25
test eax, eax
pop ecx
jne 0x4222dc
push 5
jmp 0x42232f
test byte [ebp + 0x10], 3
mov esi, dword [sym.imp.KERNEL32.dll_DeviceIoControl]
je 0x42233e
push ebx
call dword [sym.imp.KERNEL32.dll_FlushFileBuffers]
xor eax, eax
push eax
lea ecx, [ebp - 4]
push ecx
push eax
push eax
push eax
push eax
push 0x90018
push ebx
call esi
test eax, eax
je 0x42231d
xor eax, eax
push eax
lea ecx, [ebp - 4]
push ecx
push eax
push eax
push eax
push eax
push 0x90020
push ebx
call esi
test eax, eax
jne 0x42233e
test edi, edi
jne 0x422326
mov edi, str.Error
push edi
call fcn.00420ed4
pop ecx
push 2
pop esi
push ebx
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov eax, esi
pop edi
pop esi
pop ebx
leave
ret
mov eax, dword [ebp + 0x10]
mov dword [ebp - 0xc], eax
mov eax, dword [ebp + 0x14]
push 0
mov dword [ebp - 8], eax
lea eax, [ebp - 4]
push eax
push 8
lea eax, [ebp - 0xc]
push eax
push 8
push eax
push 0x83722014
push ebx
call esi
test eax, eax
jne 0x42236c
push edi
call fcn.00420ed4
pop ecx
xor esi, esi
cmp dword [ebp - 0xc], esi
je 0x422330
push ebx
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push edi
push str._1_ws_:_Not_all_new_options_were_successfully_changed.
push 0x516ba0
call fcn.00420e78
add esp, 0xc
push 3
jmp 0x4222b8