sysfunction 70.5: get device size
git-svn-id: svn://kolibrios.org@6875 a494cfbc-eb01-0410-851d-a64ba20cac60
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@ -1379,18 +1379,12 @@ dyndisk_handler:
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cmp byte [esi], 0
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jnz .haspartition
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; 11. The fs operation wants to enumerate partitions.
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; 11a. Only "list directory" operation is applicable to /<diskname> path. Check
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; the operation code. If wrong, go to 13.
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cmp dword [ebx], 1
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jnz .access_denied
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; 11b. If the media is inserted, use 'fs_dyndisk_next' as an enumeration
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; procedure. Otherwise, use 'fs_dyndisk_next_nomedia'.
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; Check whether the media is inserted.
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mov esi, fs_dyndisk_next_nomedia
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test edx, edx
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jz @f
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mov esi, fs_dyndisk_next
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@@:
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; 11c. Let the procedure from fs_lfn.inc do the job.
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@@: ; Let the procedure from fs_lfn.inc do the job.
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jmp file_system_lfn.maindir_noesi
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.root:
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@ -4231,7 +4231,7 @@ Architecture Software Developer's Manual, Volume 3, Appendix B);
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но без имени файла, за исключением корневого каталога.
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Замечания:
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* Для корневого каталога возвращается размер и имя раздела.
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* Функция не поддерживает виртуальные папки типа / и /rd.
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* Для устройства возвращается только размер.
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---------------------- Константы для регистров: ----------------------
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eax - SF_FILE (70)
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@ -4186,8 +4186,8 @@ Information on file is returned in the BDFE format (block of data
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for folder entry), explained in the description of subfunction 1,
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but without filename, except the root folder.
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Remarks:
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* For the root folder returns size and name of partition.
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* The function does not support virtual folders such as / and /rd.
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* For the root folder returns the size and the volume label.
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* For the device returns only the size.
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---------------------- Constants for registers: ----------------------
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eax - SF_FILE (70)
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@ -148,28 +148,32 @@ file_system_lfn:
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.nextCD:
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test eax, eax ; partition number
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stc
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jnz @f ; no more partitions
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mov al, 1 ; /cdX/1
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clc
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jnz @f
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inc eax ; /cdX/1
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ret
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@@:
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stc
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ret
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.maindir: ; list partitions
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mov esi, .nextCD
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xor ecx, ecx
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.maindir_noesi: ; backjump from dyndisk_handler
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push ebp
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mov ebp, ecx
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call kernel_free
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cmp dword[ebx], 1
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jnz .access_denied ; read folder?
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mov edi, [ebx+16] ; buffer
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cmp byte [ebx], 5
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jz .deviceInfo
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cmp byte [ebx], 1 ; read folder?
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jnz .access_denied
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push ebp
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pushd [ebx+4] ; first block
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mov ebp, [ebx+12] ; the number of blocks to read
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mov edx, [ebx+16] ; buffer
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mov ebx, [ebx+8] ; flags
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mov ecx, 32/4
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mov edi, edx
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mov edx, edi
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xor eax, eax
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rep stosd
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mov byte [edx], 1 ; version
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@ -200,7 +204,7 @@ file_system_lfn:
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push edx
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test eax, eax
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jnz @b
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cmp ebx, 1
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cmp ebx, 2
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jz .uni
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@@:
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pop eax
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@ -209,6 +213,8 @@ file_system_lfn:
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test eax, eax
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jnz @b
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pop edi edx eax
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cmp ebx, 3
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jz @f
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add edi, 264
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jmp .maindir_loop
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@ -219,6 +225,7 @@ file_system_lfn:
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test eax, eax
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jnz .uni
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pop edi edx eax
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@@:
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add edi, 520
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jmp .maindir_loop
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@ -238,8 +245,23 @@ file_system_lfn:
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mov dword[image_of_eax], ERROR_ACCESS_DENIED
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ret
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.deviceInfo:
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test ebp, ebp
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jz @f
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mov eax, dword[ebp+DISK.MediaInfo.Capacity]
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mov edx, dword[ebp+DISK.MediaInfo.Capacity+4]
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shld edx, eax, 9
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shl eax, 9
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mov [edi+36], edx
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mov [edi+32], eax
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@@:
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and dword[image_of_eax], 0
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ret
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.rootdir: ; / - virtual root folder
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cmp dword[ebx], 1 ; read folder?
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cmp byte [ebx], 5
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jz @b
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cmp byte [ebx], 1 ; read folder?
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jnz .access_denied
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mov ebp, [ebx+12] ; number of blocks
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mov edx, [ebx+16] ; return area
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@ -273,7 +295,7 @@ file_system_lfn:
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rep stosd
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push edi
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lea esi, [esp+8]
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cmp ebx, 1
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cmp ebx, 2
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jz .uni2
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@@:
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lodsb
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@ -281,6 +303,8 @@ file_system_lfn:
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test eax, eax
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jnz @b
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pop edi eax
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cmp ebx, 3
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jz @f
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add edi, 264
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jmp .rootdir_loop
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@ -290,6 +314,7 @@ file_system_lfn:
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test eax, eax
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jnz .uni2
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pop edi eax
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@@:
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add edi, 520
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jmp .rootdir_loop
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