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1 | /** @file | |
2 | File IO routines inspired by Streams with an EFI flavor | |
3 | ||
4 | Copyright (c) 2007, Intel Corporation. All rights reserved.<BR> | |
5 | Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> | |
6 | ||
7 | This program and the accompanying materials | |
8 | are licensed and made available under the terms and conditions of the BSD License | |
9 | which accompanies this distribution. The full text of the license may be found at | |
10 | http://opensource.org/licenses/bsd-license.php | |
11 | ||
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
14 | ||
15 | Basic support for opening files on different device types. The device string | |
16 | is in the form of DevType:Path. Current DevType is required as there is no | |
17 | current mounted device concept of current working directory concept implement | |
18 | by this library. | |
19 | ||
20 | Device names are case insensative and only check the leading characters for | |
21 | unique matches. Thus the following are all the same: | |
22 | LoadFile0: | |
23 | l0: | |
24 | L0: | |
25 | Lo0: | |
26 | ||
27 | Supported Device Names: | |
28 | A0x1234:0x12 - A memory buffer starting at address 0x1234 for 0x12 bytes | |
29 | l1: - EFI LoadFile device one. | |
30 | B0: - EFI BlockIo zero. | |
31 | fs3: - EFI Simple File System device 3 | |
32 | Fv2: - EFI Firmware VOlume device 2 | |
33 | 10.0.1.102: - TFTP service IP followed by the file name | |
34 | **/ | |
35 | ||
36 | #include <PiDxe.h> | |
37 | #include <Protocol/BlockIo.h> | |
38 | #include <Protocol/DiskIo.h> | |
39 | #include <Protocol/SimpleFileSystem.h> | |
40 | #include <Protocol/FirmwareVolume2.h> | |
41 | #include <Protocol/LoadFile.h> | |
42 | #include <Protocol/FirmwareVolumeBlock.h> | |
43 | #include <Guid/FileInfo.h> | |
44 | #include <Library/BaseLib.h> | |
45 | #include <Library/MemoryAllocationLib.h> | |
46 | #include <Library/DevicePathLib.h> | |
47 | #include <Library/PrintLib.h> | |
48 | #include <Library/BaseMemoryLib.h> | |
49 | #include <Library/UefiLib.h> | |
50 | #include <Library/UefiBootServicesTableLib.h> | |
51 | #include <Library/UefiRuntimeServicesTableLib.h> | |
52 | #include <Library/DebugLib.h> | |
53 | #include <Library/EfiFileLib.h> | |
54 | #include <Library/PcdLib.h> | |
55 | #include <Library/EblNetworkLib.h> | |
56 | ||
57 | ||
58 | CHAR8 *gCwd = NULL; | |
59 | ||
60 | CONST EFI_GUID gZeroGuid = { 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 } }; | |
61 | ||
62 | #define EFI_OPEN_FILE_GUARD_HEADER 0x4B4D4641 | |
63 | #define EFI_OPEN_FILE_GUARD_FOOTER 0x444D5A56 | |
64 | ||
65 | // Need to defend against this overflowing | |
66 | #define MAX_CMD_LINE 0x200 | |
67 | ||
68 | typedef struct { | |
69 | UINT32 Header; | |
70 | EFI_OPEN_FILE File; | |
71 | UINT32 Footer; | |
72 | } EFI_OPEN_FILE_GUARD; | |
73 | ||
74 | ||
75 | // globals to store current open device info | |
76 | EFI_HANDLE *mBlkIo = NULL; | |
77 | UINTN mBlkIoCount = 0; | |
78 | ||
79 | EFI_HANDLE *mFs = NULL; | |
80 | UINTN mFsCount = 0; | |
81 | // mFsInfo[] array entries must match mFs[] handles | |
82 | EFI_FILE_SYSTEM_INFO **mFsInfo = NULL; | |
83 | ||
84 | EFI_HANDLE *mFv = NULL; | |
85 | UINTN mFvCount = 0; | |
86 | EFI_HANDLE *mLoadFile = NULL; | |
87 | UINTN mLoadFileCount = 0; | |
88 | ||
89 | ||
90 | ||
91 | /** | |
92 | Internal worker function to validate a File handle. | |
93 | ||
94 | @param File Open File Handle | |
95 | ||
96 | @return TRUE File is valid | |
97 | @return FALSE File is not valid | |
98 | ||
99 | ||
100 | **/ | |
101 | BOOLEAN | |
102 | FileHandleValid ( | |
103 | IN EFI_OPEN_FILE *File | |
104 | ) | |
105 | { | |
106 | EFI_OPEN_FILE_GUARD *GuardFile; | |
107 | ||
108 | // Look right before and after file structure for the correct signatures | |
109 | GuardFile = BASE_CR (File, EFI_OPEN_FILE_GUARD, File); | |
110 | if ((GuardFile->Header != EFI_OPEN_FILE_GUARD_HEADER) || | |
111 | (GuardFile->Footer != EFI_OPEN_FILE_GUARD_FOOTER) ) { | |
112 | return FALSE; | |
113 | } | |
114 | ||
115 | return TRUE; | |
116 | } | |
117 | ||
118 | /** | |
119 | Internal worker function. If Buffer is not NULL free it. | |
120 | ||
121 | @param Buffer Buffer to FreePool() | |
122 | ||
123 | **/ | |
124 | VOID | |
125 | EblFreePool ( | |
126 | IN VOID *Buffer | |
127 | ) | |
128 | { | |
129 | if (Buffer != NULL) { | |
130 | FreePool (Buffer); | |
131 | } | |
132 | } | |
133 | ||
134 | /** | |
135 | Update Device List Global Variables | |
136 | ||
137 | **/ | |
138 | VOID | |
139 | EblUpdateDeviceLists ( | |
140 | VOID | |
141 | ) | |
142 | { | |
143 | EFI_STATUS Status; | |
144 | UINTN Size; | |
145 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Fs; | |
146 | EFI_FILE_HANDLE Root; | |
147 | UINTN Index; | |
148 | ||
149 | if (mBlkIo != NULL) { | |
150 | FreePool (mBlkIo); | |
151 | } | |
152 | gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &mBlkIoCount, &mBlkIo); | |
153 | ||
154 | ||
155 | ||
156 | if (mFv != NULL) { | |
157 | FreePool (mFv); | |
158 | } | |
159 | gBS->LocateHandleBuffer (ByProtocol, &gEfiFirmwareVolume2ProtocolGuid, NULL, &mFvCount, &mFv); | |
160 | ||
161 | if (mLoadFile != NULL) { | |
162 | FreePool (mLoadFile); | |
163 | } | |
164 | gBS->LocateHandleBuffer (ByProtocol, &gEfiLoadFileProtocolGuid, NULL, &mLoadFileCount, &mLoadFile); | |
165 | ||
166 | if (mFs != NULL) { | |
167 | FreePool (mFs); | |
168 | } | |
169 | ||
170 | if (&mFsInfo[0] != NULL) { | |
171 | // Need to Free the mFsInfo prior to reclaculating mFsCount so don't move this code | |
172 | for (Index = 0; Index < mFsCount; Index++) { | |
173 | if (mFsInfo[Index] != NULL) { | |
174 | FreePool (mFsInfo[Index]); | |
175 | } | |
176 | } | |
177 | FreePool (mFsInfo); | |
178 | } | |
179 | ||
180 | gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleFileSystemProtocolGuid, NULL, &mFsCount, &mFs); | |
181 | ||
182 | ||
183 | mFsInfo = AllocateZeroPool (mFsCount * sizeof (EFI_FILE_SYSTEM_INFO *)); | |
184 | if (mFsInfo == NULL) { | |
185 | // If we can't do this then we can't support file system entries | |
186 | mFsCount = 0; | |
187 | } else { | |
188 | // Loop through all the file system structures and cache the file system info data | |
189 | for (Index =0; Index < mFsCount; Index++) { | |
190 | Status = gBS->HandleProtocol (mFs[Index], &gEfiSimpleFileSystemProtocolGuid, (VOID **)&Fs); | |
191 | if (!EFI_ERROR (Status)) { | |
192 | Status = Fs->OpenVolume (Fs, &Root); | |
193 | if (!EFI_ERROR (Status)) { | |
194 | // Get information about the volume | |
195 | Size = 0; | |
196 | Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, mFsInfo[Index]); | |
197 | if (Status == EFI_BUFFER_TOO_SMALL) { | |
198 | mFsInfo[Index] = AllocatePool (Size); | |
199 | Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, mFsInfo[Index]); | |
200 | } | |
201 | ||
202 | Root->Close (Root); | |
203 | } | |
204 | } | |
205 | } | |
206 | } | |
207 | } | |
208 | ||
209 | ||
210 | /** | |
211 | PathName is in the form <device name>:<path> for example fs1:\ or ROOT:\. | |
212 | Return TRUE if the <devce name> prefix of PathName matches a file system | |
213 | Volume Name. MatchIndex is the array index in mFsInfo[] of the match, | |
214 | and it can be used with mFs[] to find the handle that needs to be opened | |
215 | ||
216 | @param PathName PathName to check | |
217 | @param FileStart Index of the first character of the <path> | |
218 | @param MatchIndex Index in mFsInfo[] that matches | |
219 | ||
220 | @return TRUE PathName matches a Volume Label and MatchIndex is valid | |
221 | @return FALSE PathName does not match a Volume Label MatchIndex undefined | |
222 | ||
223 | **/ | |
224 | BOOLEAN | |
225 | EblMatchVolumeName ( | |
226 | IN CHAR8 *PathName, | |
227 | IN UINTN FileStart, | |
228 | OUT UINTN *MatchIndex | |
229 | ) | |
230 | { | |
231 | UINTN Index; | |
232 | UINTN Compare; | |
233 | UINTN VolStrLen; | |
234 | BOOLEAN Match; | |
235 | ||
236 | for (Index =0; Index < mFsCount; Index++) { | |
237 | if (mFsInfo[Index] == NULL) { | |
238 | // FsInfo is not valid so skip it | |
239 | continue; | |
240 | } | |
241 | VolStrLen = StrLen (mFsInfo[Index]->VolumeLabel); | |
242 | for (Compare = 0, Match = TRUE; Compare < (FileStart - 1); Compare++) { | |
243 | if (Compare > VolStrLen) { | |
244 | Match = FALSE; | |
245 | break; | |
246 | } | |
247 | if (PathName[Compare] != (CHAR8)mFsInfo[Index]->VolumeLabel[Compare]) { | |
248 | // If the VolumeLabel has a space allow a _ to match with it in addition to ' ' | |
249 | if (!((PathName[Compare] == '_') && (mFsInfo[Index]->VolumeLabel[Compare] == L' '))) { | |
250 | Match = FALSE; | |
251 | break; | |
252 | } | |
253 | } | |
254 | } | |
255 | if (Match) { | |
256 | *MatchIndex = Index; | |
257 | return TRUE; | |
258 | } | |
259 | } | |
260 | ||
261 | return FALSE; | |
262 | } | |
263 | ||
264 | ||
265 | /** | |
266 | Return the number of devices of the current type active in the system | |
267 | ||
268 | @param Type Device type to check | |
269 | ||
270 | @return 0 Invalid type | |
271 | ||
272 | **/ | |
273 | UINTN | |
274 | EfiGetDeviceCounts ( | |
275 | IN EFI_OPEN_FILE_TYPE DeviceType | |
276 | ) | |
277 | { | |
278 | switch (DeviceType) { | |
279 | case EfiOpenLoadFile: | |
280 | return mLoadFileCount; | |
281 | case EfiOpenFirmwareVolume: | |
282 | return mFvCount; | |
283 | case EfiOpenFileSystem: | |
284 | return mFsCount; | |
285 | case EfiOpenBlockIo: | |
286 | return mBlkIoCount; | |
287 | default: | |
288 | return 0; | |
289 | } | |
290 | } | |
291 | ||
292 | EFI_STATUS | |
293 | ConvertIpStringToEfiIp ( | |
294 | IN CHAR8 *PathName, | |
295 | OUT EFI_IP_ADDRESS *ServerIp | |
296 | ) | |
297 | { | |
298 | CHAR8 *Str; | |
299 | ||
300 | Str = PathName; | |
301 | ServerIp->v4.Addr[0] = (UINT8)AsciiStrDecimalToUintn (Str); | |
302 | ||
303 | Str = AsciiStrStr (Str, "."); | |
304 | if (Str == NULL) { | |
305 | return EFI_DEVICE_ERROR; | |
306 | } | |
307 | ||
308 | ServerIp->v4.Addr[1] = (UINT8)AsciiStrDecimalToUintn (++Str); | |
309 | ||
310 | Str = AsciiStrStr (Str, "."); | |
311 | if (Str == NULL) { | |
312 | return EFI_DEVICE_ERROR; | |
313 | } | |
314 | ||
315 | ServerIp->v4.Addr[2] = (UINT8)AsciiStrDecimalToUintn (++Str); | |
316 | ||
317 | Str = AsciiStrStr (Str, "."); | |
318 | if (Str == NULL) { | |
319 | return EFI_DEVICE_ERROR; | |
320 | } | |
321 | ||
322 | ServerIp->v4.Addr[3] = (UINT8)AsciiStrDecimalToUintn (++Str); | |
323 | ||
324 | return EFI_SUCCESS; | |
325 | } | |
326 | ||
327 | ||
328 | /** | |
329 | Internal work function to extract a device number from a string skipping | |
330 | text. Easy way to extract numbers from strings like blk7:. | |
331 | ||
332 | @param Str String to extract device number form | |
333 | ||
334 | @return -1 Device string is not valid | |
335 | @return Device # | |
336 | ||
337 | **/ | |
338 | UINTN | |
339 | EblConvertDevStringToNumber ( | |
340 | IN CHAR8 *Str | |
341 | ) | |
342 | { | |
343 | UINTN Max; | |
344 | UINTN Index; | |
345 | ||
346 | ||
347 | // Find the first digit | |
348 | Max = AsciiStrLen (Str); | |
349 | for (Index = 0; !((*Str >= '0') && (*Str <= '9')) && (Index < Max); Index++) { | |
350 | Str++; | |
351 | } | |
352 | if (Index == Max) { | |
353 | return (UINTN)-1; | |
354 | } | |
355 | ||
356 | return AsciiStrDecimalToUintn (Str); | |
357 | } | |
358 | ||
359 | ||
360 | /** | |
361 | Internal work function to fill in EFI_OPEN_FILE information for the Fs and BlkIo | |
362 | ||
363 | @param File Open file handle | |
364 | @param FileName Name of file after device stripped off | |
365 | ||
366 | ||
367 | **/ | |
368 | EFI_STATUS | |
369 | EblFileDevicePath ( | |
370 | IN OUT EFI_OPEN_FILE *File, | |
371 | IN CHAR8 *FileName, | |
372 | IN CONST UINT64 OpenMode | |
373 | ) | |
374 | { | |
375 | EFI_STATUS Status; | |
376 | UINTN Size; | |
377 | FILEPATH_DEVICE_PATH *FilePath; | |
378 | EFI_DEVICE_PATH_PROTOCOL *FileDevicePath; | |
379 | CHAR16 UnicodeFileName[MAX_PATHNAME]; | |
380 | EFI_BLOCK_IO_PROTOCOL *BlkIo; | |
381 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Fs; | |
382 | EFI_FILE_HANDLE Root; | |
383 | ||
384 | ||
385 | if ( *FileName != 0 ) { | |
386 | AsciiStrToUnicodeStr (FileName, UnicodeFileName); | |
387 | } else { | |
388 | AsciiStrToUnicodeStr ("\\", UnicodeFileName); | |
389 | } | |
390 | ||
391 | Size = StrSize (UnicodeFileName); | |
392 | FileDevicePath = AllocatePool (Size + SIZE_OF_FILEPATH_DEVICE_PATH + sizeof (EFI_DEVICE_PATH_PROTOCOL)); | |
393 | if (FileDevicePath != NULL) { | |
394 | FilePath = (FILEPATH_DEVICE_PATH *) FileDevicePath; | |
395 | FilePath->Header.Type = MEDIA_DEVICE_PATH; | |
396 | FilePath->Header.SubType = MEDIA_FILEPATH_DP; | |
397 | CopyMem (&FilePath->PathName, UnicodeFileName, Size); | |
398 | SetDevicePathNodeLength (&FilePath->Header, Size + SIZE_OF_FILEPATH_DEVICE_PATH); | |
399 | SetDevicePathEndNode (NextDevicePathNode (&FilePath->Header)); | |
400 | ||
401 | if (File->EfiHandle != NULL) { | |
402 | File->DevicePath = DevicePathFromHandle (File->EfiHandle); | |
403 | } | |
404 | ||
405 | File->DevicePath = AppendDevicePath (File->DevicePath, FileDevicePath); | |
406 | FreePool (FileDevicePath); | |
407 | } | |
408 | ||
409 | Status = gBS->HandleProtocol (File->EfiHandle, &gEfiBlockIoProtocolGuid, (VOID **)&BlkIo); | |
410 | if (!EFI_ERROR (Status)) { | |
411 | File->FsBlockIoMedia = BlkIo->Media; | |
412 | File->FsBlockIo = BlkIo; | |
413 | ||
414 | // If we are not opening the device this will get over written with file info | |
415 | File->MaxPosition = MultU64x32 (BlkIo->Media->LastBlock + 1, BlkIo->Media->BlockSize); | |
416 | } | |
417 | ||
418 | if (File->Type == EfiOpenFileSystem) { | |
419 | Status = gBS->HandleProtocol (File->EfiHandle, &gEfiSimpleFileSystemProtocolGuid, (VOID **)&Fs); | |
420 | if (!EFI_ERROR (Status)) { | |
421 | Status = Fs->OpenVolume (Fs, &Root); | |
422 | if (!EFI_ERROR (Status)) { | |
423 | // Get information about the volume | |
424 | Size = 0; | |
425 | Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, File->FsInfo); | |
426 | if (Status == EFI_BUFFER_TOO_SMALL) { | |
427 | File->FsInfo = AllocatePool (Size); | |
428 | Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, File->FsInfo); | |
429 | } | |
430 | ||
431 | // Get information about the file | |
432 | Status = Root->Open (Root, &File->FsFileHandle, UnicodeFileName, OpenMode, 0); | |
433 | if (!EFI_ERROR (Status)) { | |
434 | Size = 0; | |
435 | Status = File->FsFileHandle->GetInfo (File->FsFileHandle, &gEfiFileInfoGuid, &Size, NULL); | |
436 | if (Status == EFI_BUFFER_TOO_SMALL) { | |
437 | File->FsFileInfo = AllocatePool (Size); | |
438 | Status = File->FsFileHandle->GetInfo (File->FsFileHandle, &gEfiFileInfoGuid, &Size, File->FsFileInfo); | |
439 | if (!EFI_ERROR (Status)) { | |
440 | File->Size = (UINTN)File->FsFileInfo->FileSize; | |
441 | File->MaxPosition = (UINT64)File->Size; | |
442 | } | |
443 | } | |
444 | } | |
445 | ||
446 | Root->Close (Root); | |
447 | } | |
448 | } | |
449 | } else if (File->Type == EfiOpenBlockIo) { | |
450 | File->Size = (UINTN)File->MaxPosition; | |
451 | } | |
452 | ||
453 | return Status; | |
454 | } | |
455 | ||
456 | #define ToUpper(a) ((((a) >= 'a') && ((a) <= 'z')) ? ((a) - 'a' + 'A') : (a)) | |
457 | ||
458 | EFI_STATUS | |
459 | CompareGuidToString ( | |
460 | IN EFI_GUID *Guid, | |
461 | IN CHAR8 *String | |
462 | ) | |
463 | { | |
464 | CHAR8 AsciiGuid[64]; | |
465 | CHAR8 *StringPtr; | |
466 | CHAR8 *GuidPtr; | |
467 | ||
468 | AsciiSPrint (AsciiGuid, sizeof(AsciiGuid), "%g", Guid); | |
469 | ||
470 | StringPtr = String; | |
471 | GuidPtr = AsciiGuid; | |
472 | ||
473 | while ((*StringPtr != '\0') && (*GuidPtr != '\0')) { | |
474 | // Skip dashes | |
475 | if (*StringPtr == '-') { | |
476 | StringPtr++; | |
477 | continue; | |
478 | } | |
479 | ||
480 | if (*GuidPtr == '-') { | |
481 | GuidPtr++; | |
482 | continue; | |
483 | } | |
484 | ||
485 | if (ToUpper(*StringPtr) != ToUpper(*GuidPtr)) { | |
486 | return EFI_NOT_FOUND; | |
487 | } | |
488 | ||
489 | StringPtr++; | |
490 | GuidPtr++; | |
491 | } | |
492 | ||
493 | return EFI_SUCCESS; | |
494 | } | |
495 | ||
496 | ||
497 | /** | |
498 | Internal work function to fill in EFI_OPEN_FILE information for the FV | |
499 | ||
500 | @param File Open file handle | |
501 | @param FileName Name of file after device stripped off | |
502 | ||
503 | ||
504 | **/ | |
505 | EFI_STATUS | |
506 | EblFvFileDevicePath ( | |
507 | IN OUT EFI_OPEN_FILE *File, | |
508 | IN CHAR8 *FileName, | |
509 | IN CONST UINT64 OpenMode | |
510 | ) | |
511 | { | |
512 | EFI_STATUS Status; | |
513 | EFI_STATUS GetNextFileStatus; | |
514 | MEDIA_FW_VOL_FILEPATH_DEVICE_PATH DevicePathNode; | |
515 | EFI_DEVICE_PATH_PROTOCOL *DevicePath; | |
516 | UINTN Key; | |
517 | UINT32 AuthenticationStatus; | |
518 | CHAR8 AsciiSection[MAX_PATHNAME]; | |
519 | VOID *Section; | |
520 | UINTN SectionSize; | |
521 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb; | |
522 | EFI_LBA Lba; | |
523 | UINTN BlockSize; | |
524 | UINTN NumberOfBlocks; | |
525 | EFI_FIRMWARE_VOLUME_HEADER *FvHeader = NULL; | |
526 | UINTN Index; | |
527 | ||
528 | ||
529 | Status = gBS->HandleProtocol (File->EfiHandle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&File->Fv); | |
530 | if (EFI_ERROR (Status)) { | |
531 | return Status; | |
532 | } | |
533 | ||
534 | // Get FVB Info about the handle | |
535 | Status = gBS->HandleProtocol (File->EfiHandle, &gEfiFirmwareVolumeBlockProtocolGuid, (VOID **)&Fvb); | |
536 | if (!EFI_ERROR (Status)) { | |
537 | Status = Fvb->GetPhysicalAddress (Fvb, &File->FvStart); | |
538 | if (!EFI_ERROR (Status)) { | |
539 | FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)File->FvStart; | |
540 | File->FvHeaderSize = sizeof (EFI_FIRMWARE_VOLUME_HEADER); | |
541 | for (Index = 0; FvHeader->BlockMap[Index].Length !=0; Index++) { | |
542 | File->FvHeaderSize += sizeof (EFI_FV_BLOCK_MAP_ENTRY); | |
543 | } | |
544 | ||
545 | for (Lba = 0, File->FvSize = 0, NumberOfBlocks = 0; ; File->FvSize += (BlockSize * NumberOfBlocks), Lba += NumberOfBlocks) { | |
546 | Status = Fvb->GetBlockSize (Fvb, Lba, &BlockSize, &NumberOfBlocks); | |
547 | if (EFI_ERROR (Status)) { | |
548 | break; | |
549 | } | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | ||
555 | DevicePath = DevicePathFromHandle (File->EfiHandle); | |
556 | ||
557 | if (*FileName == '\0') { | |
558 | File->DevicePath = DuplicateDevicePath (DevicePath); | |
559 | File->Size = File->FvSize; | |
560 | File->MaxPosition = File->Size; | |
561 | } else { | |
562 | Key = 0; | |
563 | do { | |
564 | File->FvType = EFI_FV_FILETYPE_ALL; | |
565 | GetNextFileStatus = File->Fv->GetNextFile ( | |
566 | File->Fv, | |
567 | &Key, | |
568 | &File->FvType, | |
569 | &File->FvNameGuid, | |
570 | &File->FvAttributes, | |
571 | &File->Size | |
572 | ); | |
573 | if (!EFI_ERROR (GetNextFileStatus)) { | |
574 | // Compare GUID first | |
575 | Status = CompareGuidToString (&File->FvNameGuid, FileName); | |
576 | if (!EFI_ERROR(Status)) { | |
577 | break; | |
578 | } | |
579 | ||
580 | Section = NULL; | |
581 | Status = File->Fv->ReadSection ( | |
582 | File->Fv, | |
583 | &File->FvNameGuid, | |
584 | EFI_SECTION_USER_INTERFACE, | |
585 | 0, | |
586 | &Section, | |
587 | &SectionSize, | |
588 | &AuthenticationStatus | |
589 | ); | |
590 | if (!EFI_ERROR (Status)) { | |
591 | UnicodeStrToAsciiStr (Section, AsciiSection); | |
592 | if (AsciiStriCmp (FileName, AsciiSection) == 0) { | |
593 | FreePool (Section); | |
594 | break; | |
595 | } | |
596 | FreePool (Section); | |
597 | } | |
598 | } | |
599 | } while (!EFI_ERROR (GetNextFileStatus)); | |
600 | ||
601 | if (EFI_ERROR (GetNextFileStatus)) { | |
602 | return GetNextFileStatus; | |
603 | } | |
604 | ||
605 | if (OpenMode != EFI_SECTION_ALL) { | |
606 | // Calculate the size of the section we are targeting | |
607 | Section = NULL; | |
608 | File->Size = 0; | |
609 | Status = File->Fv->ReadSection ( | |
610 | File->Fv, | |
611 | &File->FvNameGuid, | |
612 | (EFI_SECTION_TYPE)OpenMode, | |
613 | 0, | |
614 | &Section, | |
615 | &File->Size, | |
616 | &AuthenticationStatus | |
617 | ); | |
618 | if (EFI_ERROR (Status)) { | |
619 | return Status; | |
620 | } | |
621 | } | |
622 | ||
623 | File->MaxPosition = File->Size; | |
624 | EfiInitializeFwVolDevicepathNode (&DevicePathNode, &File->FvNameGuid); | |
625 | File->DevicePath = AppendDevicePathNode (DevicePath, (EFI_DEVICE_PATH_PROTOCOL *)&DevicePathNode); | |
626 | } | |
627 | ||
628 | ||
629 | // FVB not required if FV was soft loaded... | |
630 | return EFI_SUCCESS; | |
631 | } | |
632 | ||
633 | ||
634 | ||
635 | ||
636 | /** | |
637 | Open a device named by PathName. The PathName includes a device name and | |
638 | path seperated by a :. See file header for more details on the PathName | |
639 | syntax. There is no checking to prevent a file from being opened more than | |
640 | one type. | |
641 | ||
642 | SectionType is only used to open an FV. Each file in an FV contains multiple | |
643 | secitons and only the SectionType section is opened. | |
644 | ||
645 | For any file that is opened with EfiOpen() must be closed with EfiClose(). | |
646 | ||
647 | @param PathName Path to parse to open | |
648 | @param OpenMode Same as EFI_FILE.Open() | |
649 | @param SectionType Section in FV to open. | |
650 | ||
651 | @return NULL Open failed | |
652 | @return Valid EFI_OPEN_FILE handle | |
653 | ||
654 | **/ | |
655 | EFI_OPEN_FILE * | |
656 | EfiOpen ( | |
657 | IN CHAR8 *PathName, | |
658 | IN CONST UINT64 OpenMode, | |
659 | IN CONST EFI_SECTION_TYPE SectionType | |
660 | ) | |
661 | { | |
662 | EFI_STATUS Status; | |
663 | EFI_OPEN_FILE *File; | |
664 | EFI_OPEN_FILE FileData; | |
665 | UINTN StrLen; | |
666 | UINTN FileStart; | |
667 | UINTN DevNumber = 0; | |
668 | EFI_OPEN_FILE_GUARD *GuardFile; | |
669 | BOOLEAN VolumeNameMatch; | |
670 | EFI_DEVICE_PATH_PROTOCOL *DevicePath; | |
671 | UINTN Size; | |
672 | EFI_IP_ADDRESS Ip; | |
673 | CHAR8 *CwdPlusPathName; | |
674 | UINTN Index; | |
675 | EFI_SECTION_TYPE ModifiedSectionType; | |
676 | ||
677 | EblUpdateDeviceLists (); | |
678 | ||
679 | File = &FileData; | |
680 | ZeroMem (File, sizeof (EFI_OPEN_FILE)); | |
681 | ||
682 | StrLen = AsciiStrSize (PathName); | |
683 | if (StrLen <= 1) { | |
684 | // Smallest valid path is 1 char and a null | |
685 | return NULL; | |
686 | } | |
687 | ||
688 | for (FileStart = 0; FileStart < StrLen; FileStart++) { | |
689 | if (PathName[FileStart] == ':') { | |
690 | FileStart++; | |
691 | break; | |
692 | } | |
693 | } | |
694 | ||
695 | // | |
696 | // Matching volume name has precedence over handle based names | |
697 | // | |
698 | VolumeNameMatch = EblMatchVolumeName (PathName, FileStart, &DevNumber); | |
699 | if (!VolumeNameMatch) { | |
700 | if (FileStart == StrLen) { | |
701 | // No Volume name or device name, so try Current Working Directory | |
702 | if (gCwd == NULL) { | |
703 | // No CWD | |
704 | return NULL; | |
705 | } | |
706 | ||
707 | // We could add a current working diretory concept | |
708 | CwdPlusPathName = AllocatePool (AsciiStrSize (gCwd) + AsciiStrSize (PathName)); | |
709 | if (CwdPlusPathName == NULL) { | |
710 | return NULL; | |
711 | } | |
712 | ||
713 | if ((PathName[0] == '/') || (PathName[0] == '\\')) { | |
714 | // PathName starts in / so this means we go to the root of the device in the CWD. | |
715 | CwdPlusPathName[0] = '\0'; | |
716 | for (FileStart = 0; gCwd[FileStart] != '\0'; FileStart++) { | |
717 | CwdPlusPathName[FileStart] = gCwd[FileStart]; | |
718 | if (gCwd[FileStart] == ':') { | |
719 | FileStart++; | |
720 | CwdPlusPathName[FileStart] = '\0'; | |
721 | break; | |
722 | } | |
723 | } | |
724 | } else { | |
725 | AsciiStrCpy (CwdPlusPathName, gCwd); | |
726 | StrLen = AsciiStrLen (gCwd); | |
727 | if ((*PathName != '/') && (*PathName != '\\') && (gCwd[StrLen-1] != '/') && (gCwd[StrLen-1] != '\\')) { | |
728 | AsciiStrCat (CwdPlusPathName, "\\"); | |
729 | } | |
730 | } | |
731 | ||
732 | AsciiStrCat (CwdPlusPathName, PathName); | |
733 | if (AsciiStrStr (CwdPlusPathName, ":") == NULL) { | |
734 | // Extra error check to make sure we don't recusre and blow stack | |
735 | return NULL; | |
736 | } | |
737 | ||
738 | File = EfiOpen (CwdPlusPathName, OpenMode, SectionType); | |
739 | FreePool (CwdPlusPathName); | |
740 | return File; | |
741 | } | |
742 | ||
743 | DevNumber = EblConvertDevStringToNumber ((CHAR8 *)PathName); | |
744 | } | |
745 | ||
746 | File->DeviceName = AllocatePool (StrLen); | |
747 | AsciiStrCpy (File->DeviceName, PathName); | |
748 | File->DeviceName[FileStart - 1] = '\0'; | |
749 | File->FileName = &File->DeviceName[FileStart]; | |
750 | if (File->FileName[0] == '\0') { | |
751 | // if it is just a file name use / as root | |
752 | File->FileName = "\\"; | |
753 | } | |
754 | ||
755 | // | |
756 | // Use best match algorithm on the dev names so we only need to look at the | |
757 | // first few charters to match the full device name. Short name forms are | |
758 | // legal from the caller. | |
759 | // | |
760 | Status = EFI_SUCCESS; | |
761 | if (*PathName == 'f' || *PathName == 'F' || VolumeNameMatch) { | |
762 | if (PathName[1] == 's' || PathName[1] == 'S' || VolumeNameMatch) { | |
763 | if (DevNumber >= mFsCount) { | |
764 | goto ErrorExit; | |
765 | } | |
766 | File->Type = EfiOpenFileSystem; | |
767 | File->EfiHandle = mFs[DevNumber]; | |
768 | Status = EblFileDevicePath (File, &PathName[FileStart], OpenMode); | |
769 | ||
770 | } else if (PathName[1] == 'v' || PathName[1] == 'V') { | |
771 | if (DevNumber >= mFvCount) { | |
772 | goto ErrorExit; | |
773 | } | |
774 | File->Type = EfiOpenFirmwareVolume; | |
775 | File->EfiHandle = mFv[DevNumber]; | |
776 | ||
777 | if ((PathName[FileStart] == '/') || (PathName[FileStart] == '\\')) { | |
778 | // Skip leading / as its not really needed for the FV since no directories are supported | |
779 | FileStart++; | |
780 | } | |
781 | ||
782 | // Check for 2nd : | |
783 | ModifiedSectionType = SectionType; | |
784 | for (Index = FileStart; PathName[Index] != '\0'; Index++) { | |
785 | if (PathName[Index] == ':') { | |
786 | // Support fv0:\DxeCore:0x10 | |
787 | // This means open the PE32 Section of the file | |
788 | ModifiedSectionType = (EFI_SECTION_TYPE)AsciiStrHexToUintn (&PathName[Index + 1]); | |
789 | PathName[Index] = '\0'; | |
790 | } | |
791 | } | |
792 | File->FvSectionType = ModifiedSectionType; | |
793 | Status = EblFvFileDevicePath (File, &PathName[FileStart], ModifiedSectionType); | |
794 | } | |
795 | } else if ((*PathName == 'A') || (*PathName == 'a')) { | |
796 | // Handle a:0x10000000:0x1234 address form a:ADDRESS:SIZE | |
797 | File->Type = EfiOpenMemoryBuffer; | |
798 | // 1st colon is at PathName[FileStart - 1] | |
799 | File->Buffer = (VOID *)AsciiStrHexToUintn (&PathName[FileStart]); | |
800 | ||
801 | // Find 2nd colon | |
802 | while ((PathName[FileStart] != ':') && (PathName[FileStart] != '\0')) { | |
803 | FileStart++; | |
804 | } | |
805 | ||
806 | // If we ran out of string, there's no extra data | |
807 | if (PathName[FileStart] == '\0') { | |
808 | File->Size = 0; | |
809 | } else { | |
810 | File->Size = AsciiStrHexToUintn (&PathName[FileStart + 1]); | |
811 | } | |
812 | ||
813 | // if there's no number after the second colon, default | |
814 | // the end of memory | |
815 | if (File->Size == 0) { | |
816 | File->Size = (UINTN)(0 - (UINTN)File->Buffer); | |
817 | } | |
818 | ||
819 | File->MaxPosition = File->Size; | |
820 | File->BaseOffset = (UINTN)File->Buffer; | |
821 | ||
822 | } else if (*PathName== 'l' || *PathName == 'L') { | |
823 | if (DevNumber >= mLoadFileCount) { | |
824 | goto ErrorExit; | |
825 | } | |
826 | File->Type = EfiOpenLoadFile; | |
827 | File->EfiHandle = mLoadFile[DevNumber]; | |
828 | ||
829 | Status = gBS->HandleProtocol (File->EfiHandle, &gEfiLoadFileProtocolGuid, (VOID **)&File->LoadFile); | |
830 | if (EFI_ERROR (Status)) { | |
831 | goto ErrorExit; | |
832 | } | |
833 | ||
834 | Status = gBS->HandleProtocol (File->EfiHandle, &gEfiDevicePathProtocolGuid, (VOID **)&DevicePath); | |
835 | if (EFI_ERROR (Status)) { | |
836 | goto ErrorExit; | |
837 | } | |
838 | File->DevicePath = DuplicateDevicePath (DevicePath); | |
839 | ||
840 | } else if (*PathName == 'b' || *PathName == 'B') { | |
841 | // Handle b#:0x10000000:0x1234 address form b#:ADDRESS:SIZE | |
842 | if (DevNumber >= mBlkIoCount) { | |
843 | goto ErrorExit; | |
844 | } | |
845 | File->Type = EfiOpenBlockIo; | |
846 | File->EfiHandle = mBlkIo[DevNumber]; | |
847 | EblFileDevicePath (File, "", OpenMode); | |
848 | ||
849 | // 1st colon is at PathName[FileStart - 1] | |
850 | File->DiskOffset = AsciiStrHexToUintn (&PathName[FileStart]); | |
851 | ||
852 | // Find 2nd colon | |
853 | while ((PathName[FileStart] != ':') && (PathName[FileStart] != '\0')) { | |
854 | FileStart++; | |
855 | } | |
856 | ||
857 | // If we ran out of string, there's no extra data | |
858 | if (PathName[FileStart] == '\0') { | |
859 | Size = 0; | |
860 | } else { | |
861 | Size = AsciiStrHexToUintn (&PathName[FileStart + 1]); | |
862 | } | |
863 | ||
864 | // if a zero size is passed in (or the size is left out entirely), | |
865 | // go to the end of the device. | |
866 | if (Size == 0) { | |
867 | File->Size = File->Size - File->DiskOffset; | |
868 | } else { | |
869 | File->Size = Size; | |
870 | } | |
871 | ||
872 | File->MaxPosition = File->Size; | |
873 | File->BaseOffset = File->DiskOffset; | |
874 | } else if ((*PathName) >= '0' && (*PathName <= '9')) { | |
875 | ||
876 | // Get current IP address | |
877 | Status = EblGetCurrentIpAddress (&Ip); | |
878 | if (EFI_ERROR(Status)) { | |
879 | AsciiPrint("Device IP Address is not configured.\n"); | |
880 | goto ErrorExit; | |
881 | } | |
882 | ||
883 | ||
884 | // Parse X.X.X.X:Filename, only support IPv4 TFTP for now... | |
885 | File->Type = EfiOpenTftp; | |
886 | File->IsDirty = FALSE; | |
887 | File->IsBufferValid = FALSE; | |
888 | ||
889 | Status = ConvertIpStringToEfiIp (PathName, &File->ServerIp); | |
890 | } | |
891 | ||
892 | if (EFI_ERROR (Status)) { | |
893 | goto ErrorExit; | |
894 | } | |
895 | ||
896 | GuardFile = (EFI_OPEN_FILE_GUARD *)AllocateZeroPool (sizeof (EFI_OPEN_FILE_GUARD)); | |
897 | if (GuardFile == NULL) { | |
898 | goto ErrorExit; | |
899 | } | |
900 | ||
901 | GuardFile->Header = EFI_OPEN_FILE_GUARD_HEADER; | |
902 | CopyMem (&(GuardFile->File), &FileData, sizeof (EFI_OPEN_FILE)); | |
903 | GuardFile->Footer = EFI_OPEN_FILE_GUARD_FOOTER; | |
904 | ||
905 | return &(GuardFile->File); | |
906 | ||
907 | ErrorExit: | |
908 | FreePool (File->DeviceName); | |
909 | return NULL; | |
910 | } | |
911 | ||
912 | #define FILE_COPY_CHUNK 0x01000000 | |
913 | ||
914 | EFI_STATUS | |
915 | EfiCopyFile ( | |
916 | IN CHAR8 *DestinationFile, | |
917 | IN CHAR8 *SourceFile | |
918 | ) | |
919 | { | |
920 | EFI_OPEN_FILE *Source = NULL; | |
921 | EFI_OPEN_FILE *Destination = NULL; | |
922 | EFI_STATUS Status = EFI_SUCCESS; | |
923 | VOID *Buffer = NULL; | |
924 | UINTN Size; | |
925 | UINTN Offset; | |
926 | UINTN Chunk = FILE_COPY_CHUNK; | |
927 | ||
928 | Source = EfiOpen (SourceFile, EFI_FILE_MODE_READ, 0); | |
929 | if (Source == NULL) { | |
930 | AsciiPrint("Source file open error.\n"); | |
931 | Status = EFI_NOT_FOUND; | |
932 | goto Exit; | |
933 | } | |
934 | ||
935 | Destination = EfiOpen (DestinationFile, EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE, 0); | |
936 | if (Destination == NULL) { | |
937 | AsciiPrint("Destination file open error.\n"); | |
938 | Status = EFI_NOT_FOUND; | |
939 | goto Exit; | |
940 | } | |
941 | ||
942 | Buffer = AllocatePool(FILE_COPY_CHUNK); | |
943 | if (Buffer == NULL) { | |
944 | Status = EFI_OUT_OF_RESOURCES; | |
945 | goto Exit; | |
946 | } | |
947 | ||
948 | Size = EfiTell(Source, NULL); | |
949 | ||
950 | for (Offset = 0; Offset + FILE_COPY_CHUNK <= Size; Offset += Chunk) { | |
951 | Chunk = FILE_COPY_CHUNK; | |
952 | ||
953 | Status = EfiRead(Source, Buffer, &Chunk); | |
954 | if (EFI_ERROR(Status)) { | |
955 | AsciiPrint("Read file error %r\n", Status); | |
956 | goto Exit; | |
957 | } | |
958 | ||
959 | Status = EfiWrite(Destination, Buffer, &Chunk); | |
960 | if (EFI_ERROR(Status)) { | |
961 | AsciiPrint("Write file error %r\n", Status); | |
962 | goto Exit; | |
963 | } | |
964 | } | |
965 | ||
966 | // Any left over? | |
967 | if (Offset < Size) { | |
968 | Chunk = Size - Offset; | |
969 | ||
970 | Status = EfiRead(Source, Buffer, &Chunk); | |
971 | if (EFI_ERROR(Status)) { | |
972 | AsciiPrint("Read file error\n"); | |
973 | goto Exit; | |
974 | } | |
975 | ||
976 | Status = EfiWrite(Destination, Buffer, &Chunk); | |
977 | if (EFI_ERROR(Status)) { | |
978 | AsciiPrint("Write file error\n"); | |
979 | goto Exit; | |
980 | } | |
981 | } | |
982 | ||
983 | Exit: | |
984 | if (Source != NULL) { | |
985 | Status = EfiClose(Source); | |
986 | if (EFI_ERROR(Status)) { | |
987 | AsciiPrint("Source close error"); | |
988 | } | |
989 | } | |
990 | ||
991 | if (Destination != NULL) { | |
992 | Status = EfiClose(Destination); | |
993 | if (EFI_ERROR(Status)) { | |
994 | AsciiPrint("Destination close error"); | |
995 | } | |
996 | } | |
997 | ||
998 | if (Buffer != NULL) { | |
999 | FreePool(Buffer); | |
1000 | } | |
1001 | ||
1002 | return Status; | |
1003 | } | |
1004 | ||
1005 | /** | |
1006 | Use DeviceType and Index to form a valid PathName and try and open it. | |
1007 | ||
1008 | @param DeviceType Device type to open | |
1009 | @param Index Device Index to use. Zero relative. | |
1010 | ||
1011 | @return NULL Open failed | |
1012 | @return Valid EFI_OPEN_FILE handle | |
1013 | ||
1014 | **/ | |
1015 | EFI_OPEN_FILE * | |
1016 | EfiDeviceOpenByType ( | |
1017 | IN EFI_OPEN_FILE_TYPE DeviceType, | |
1018 | IN UINTN Index | |
1019 | ) | |
1020 | { | |
1021 | CHAR8 *DevStr; | |
1022 | CHAR8 Path[MAX_CMD_LINE]; | |
1023 | ||
1024 | switch (DeviceType) { | |
1025 | case EfiOpenLoadFile: | |
1026 | DevStr = "loadfile%d:"; | |
1027 | break; | |
1028 | case EfiOpenFirmwareVolume: | |
1029 | DevStr = "fv%d:"; | |
1030 | break; | |
1031 | case EfiOpenFileSystem: | |
1032 | DevStr = "fs%d:"; | |
1033 | break; | |
1034 | case EfiOpenBlockIo: | |
1035 | DevStr = "blk%d:"; | |
1036 | break; | |
1037 | case EfiOpenMemoryBuffer: | |
1038 | DevStr = "a%d:"; | |
1039 | break; | |
1040 | default: | |
1041 | return NULL; | |
1042 | } | |
1043 | ||
1044 | AsciiSPrint (Path, MAX_PATHNAME, DevStr, Index); | |
1045 | ||
1046 | return EfiOpen (Path, EFI_FILE_MODE_READ, 0); | |
1047 | } | |
1048 | ||
1049 | ||
1050 | /** | |
1051 | Close a file handle opened by EfiOpen() and free all resources allocated by | |
1052 | EfiOpen(). | |
1053 | ||
1054 | @param Stream Open File Handle | |
1055 | ||
1056 | @return EFI_INVALID_PARAMETER Stream is not an Open File | |
1057 | @return EFI_SUCCESS Steam closed | |
1058 | ||
1059 | **/ | |
1060 | EFI_STATUS | |
1061 | EfiClose ( | |
1062 | IN EFI_OPEN_FILE *File | |
1063 | ) | |
1064 | { | |
1065 | EFI_STATUS Status; | |
1066 | UINT64 TftpBufferSize; | |
1067 | ||
1068 | if (!FileHandleValid (File)) { | |
1069 | return EFI_INVALID_PARAMETER; | |
1070 | } | |
1071 | ||
1072 | //Write the buffer contents to TFTP file. | |
1073 | if ((File->Type == EfiOpenTftp) && (File->IsDirty)) { | |
1074 | ||
1075 | TftpBufferSize = File->Size; | |
1076 | Status = EblMtftp ( | |
1077 | EFI_PXE_BASE_CODE_TFTP_WRITE_FILE, | |
1078 | File->Buffer, | |
1079 | TRUE, | |
1080 | &TftpBufferSize, | |
1081 | NULL, | |
1082 | &File->ServerIp, | |
1083 | (UINT8 *)File->FileName, | |
1084 | NULL, | |
1085 | FALSE | |
1086 | ); | |
1087 | if (EFI_ERROR(Status)) { | |
1088 | AsciiPrint("TFTP error during APPLE_NSP_TFTP_WRITE_FILE: %r\n", Status); | |
1089 | return Status; | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | if ((File->Type == EfiOpenLoadFile) || | |
1094 | ((File->Type == EfiOpenTftp) && (File->IsBufferValid == TRUE)) || | |
1095 | ((File->Type == EfiOpenFirmwareVolume) && (File->IsBufferValid == TRUE))) { | |
1096 | EblFreePool(File->Buffer); | |
1097 | } | |
1098 | ||
1099 | EblFreePool (File->DevicePath); | |
1100 | EblFreePool (File->DeviceName); | |
1101 | EblFreePool (File->FsFileInfo); | |
1102 | EblFreePool (File->FsInfo); | |
1103 | ||
1104 | if (File->FsFileHandle != NULL) { | |
1105 | File->FsFileHandle->Close (File->FsFileHandle); | |
1106 | } | |
1107 | ||
1108 | // Need to free File and it's Guard structures | |
1109 | EblFreePool (BASE_CR (File, EFI_OPEN_FILE_GUARD, File)); | |
1110 | return EFI_SUCCESS; | |
1111 | } | |
1112 | ||
1113 | ||
1114 | /** | |
1115 | Return the size of the file represented by Stream. Also return the current | |
1116 | Seek position. Opening a file will enable a valid file size to be returned. | |
1117 | LoadFile is an exception as a load file size is set to zero. | |
1118 | ||
1119 | @param Stream Open File Handle | |
1120 | ||
1121 | @return 0 Stream is not an Open File or a valid LoadFile handle | |
1122 | ||
1123 | **/ | |
1124 | UINTN | |
1125 | EfiTell ( | |
1126 | IN EFI_OPEN_FILE *File, | |
1127 | OUT EFI_LBA *CurrentPosition OPTIONAL | |
1128 | ) | |
1129 | { | |
1130 | EFI_STATUS Status; | |
1131 | UINT64 BufferSize = 0; | |
1132 | ||
1133 | if (!FileHandleValid (File)) { | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | if (CurrentPosition != NULL) { | |
1138 | *CurrentPosition = File->CurrentPosition; | |
1139 | } | |
1140 | ||
1141 | if (File->Type == EfiOpenLoadFile) { | |
1142 | // Figure out the File->Size | |
1143 | File->Buffer = NULL; | |
1144 | File->Size = 0; | |
1145 | Status = File->LoadFile->LoadFile (File->LoadFile, File->DevicePath, FALSE, &File->Size, File->Buffer); | |
1146 | if (Status != EFI_BUFFER_TOO_SMALL) { | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | File->MaxPosition = (UINT64)File->Size; | |
1151 | } else if (File->Type == EfiOpenTftp) { | |
1152 | ||
1153 | Status = EblMtftp ( | |
1154 | EFI_PXE_BASE_CODE_TFTP_GET_FILE_SIZE, | |
1155 | NULL, | |
1156 | FALSE, | |
1157 | &BufferSize, | |
1158 | NULL, | |
1159 | &File->ServerIp, | |
1160 | (UINT8 *)File->FileName, | |
1161 | NULL, | |
1162 | TRUE | |
1163 | ); | |
1164 | if (EFI_ERROR(Status)) { | |
1165 | AsciiPrint("TFTP error during APPLE_NSP_TFTP_GET_FILE_SIZE: %r\n", Status); | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | File->Size = (UINTN)BufferSize; | |
1170 | File->MaxPosition = File->Size; | |
1171 | } | |
1172 | ||
1173 | return File->Size; | |
1174 | } | |
1175 | ||
1176 | ||
1177 | /** | |
1178 | Seek to the Offset locaiton in the file. LoadFile and FV device types do | |
1179 | not support EfiSeek(). It is not possible to grow the file size using | |
1180 | EfiSeek(). | |
1181 | ||
1182 | SeekType defines how use Offset to calculate the new file position: | |
1183 | EfiSeekStart : Position = Offset | |
1184 | EfiSeekCurrent: Position is Offset bytes from the current position | |
1185 | EfiSeekEnd : Only supported if Offset is zero to seek to end of file. | |
1186 | ||
1187 | @param Stream Open File Handle | |
1188 | @param Offset Offset to seek too. | |
1189 | @param SeekType Type of seek to perform | |
1190 | ||
1191 | ||
1192 | @return EFI_INVALID_PARAMETER Stream is not an Open File | |
1193 | @return EFI_UNSUPPORTED LoadFile and FV doe not support Seek | |
1194 | @return EFI_NOT_FOUND Seek past the end of the file. | |
1195 | @return EFI_SUCCESS Steam closed | |
1196 | ||
1197 | **/ | |
1198 | EFI_STATUS | |
1199 | EfiSeek ( | |
1200 | IN EFI_OPEN_FILE *File, | |
1201 | IN EFI_LBA Offset, | |
1202 | IN EFI_SEEK_TYPE SeekType | |
1203 | ) | |
1204 | { | |
1205 | EFI_STATUS Status; | |
1206 | UINT64 CurrentPosition; | |
1207 | ||
1208 | if (!FileHandleValid (File)) { | |
1209 | return EFI_INVALID_PARAMETER; | |
1210 | } | |
1211 | ||
1212 | if (File->Type == EfiOpenLoadFile) { | |
1213 | // LoadFile does not support Seek | |
1214 | return EFI_UNSUPPORTED; | |
1215 | } | |
1216 | ||
1217 | CurrentPosition = File->CurrentPosition; | |
1218 | switch (SeekType) { | |
1219 | case EfiSeekStart: | |
1220 | if (Offset > File->MaxPosition) { | |
1221 | return EFI_NOT_FOUND; | |
1222 | } | |
1223 | CurrentPosition = Offset; | |
1224 | break; | |
1225 | ||
1226 | case EfiSeekCurrent: | |
1227 | if ((File->CurrentPosition + Offset) > File->MaxPosition) { | |
1228 | return EFI_NOT_FOUND; | |
1229 | } | |
1230 | CurrentPosition += Offset; | |
1231 | break; | |
1232 | ||
1233 | case EfiSeekEnd: | |
1234 | if (Offset != 0) { | |
1235 | // We don't support growing file size via seeking past end of file | |
1236 | return EFI_UNSUPPORTED; | |
1237 | } | |
1238 | CurrentPosition = File->MaxPosition; | |
1239 | break; | |
1240 | ||
1241 | default: | |
1242 | return EFI_NOT_FOUND; | |
1243 | } | |
1244 | ||
1245 | Status = EFI_SUCCESS; | |
1246 | if (File->FsFileHandle != NULL) { | |
1247 | Status = File->FsFileHandle->SetPosition (File->FsFileHandle, CurrentPosition); | |
1248 | } | |
1249 | ||
1250 | if (!EFI_ERROR (Status)) { | |
1251 | File->CurrentPosition = CurrentPosition; | |
1252 | } | |
1253 | ||
1254 | return Status; | |
1255 | } | |
1256 | ||
1257 | EFI_STATUS | |
1258 | CacheTftpFile ( | |
1259 | IN OUT EFI_OPEN_FILE *File | |
1260 | ) | |
1261 | { | |
1262 | EFI_STATUS Status; | |
1263 | UINT64 TftpBufferSize; | |
1264 | ||
1265 | if (File->IsBufferValid) { | |
1266 | return EFI_SUCCESS; | |
1267 | } | |
1268 | ||
1269 | // Make sure the file size is set. | |
1270 | EfiTell (File, NULL); | |
1271 | ||
1272 | //Allocate a buffer to hold the whole file. | |
1273 | File->Buffer = AllocatePool(File->Size); | |
1274 | if (File->Buffer == NULL) { | |
1275 | return EFI_OUT_OF_RESOURCES; | |
1276 | } | |
1277 | ||
1278 | TftpBufferSize = File->Size; | |
1279 | ||
1280 | Status = EblMtftp ( | |
1281 | EFI_PXE_BASE_CODE_TFTP_READ_FILE, | |
1282 | File->Buffer, | |
1283 | FALSE, | |
1284 | &TftpBufferSize, | |
1285 | NULL, | |
1286 | &File->ServerIp, | |
1287 | (UINT8 *)File->FileName, | |
1288 | NULL, | |
1289 | FALSE); | |
1290 | if (EFI_ERROR(Status)) { | |
1291 | AsciiPrint("TFTP error during APPLE_NSP_TFTP_READ_FILE: %r\n", Status); | |
1292 | FreePool(File->Buffer); | |
1293 | return Status; | |
1294 | } | |
1295 | ||
1296 | // Set the buffer valid flag. | |
1297 | File->IsBufferValid = TRUE; | |
1298 | ||
1299 | return Status; | |
1300 | } | |
1301 | ||
1302 | /** | |
1303 | Read BufferSize bytes from the current locaiton in the file. For load file, | |
1304 | FV, and TFTP case you must read the entire file. | |
1305 | ||
1306 | @param Stream Open File Handle | |
1307 | @param Buffer Caller allocated buffer. | |
1308 | @param BufferSize Size of buffer in bytes. | |
1309 | ||
1310 | ||
1311 | @return EFI_SUCCESS Stream is not an Open File | |
1312 | @return EFI_END_OF_FILE Tried to read past the end of the file | |
1313 | @return EFI_INVALID_PARAMETER Stream is not an open file handle | |
1314 | @return EFI_BUFFER_TOO_SMALL Buffer is not big enough to do the read | |
1315 | @return "other" Error returned from device read | |
1316 | ||
1317 | **/ | |
1318 | EFI_STATUS | |
1319 | EfiRead ( | |
1320 | IN EFI_OPEN_FILE *File, | |
1321 | OUT VOID *Buffer, | |
1322 | OUT UINTN *BufferSize | |
1323 | ) | |
1324 | { | |
1325 | EFI_STATUS Status; | |
1326 | UINT32 AuthenticationStatus; | |
1327 | EFI_DISK_IO_PROTOCOL *DiskIo; | |
1328 | ||
1329 | if (!FileHandleValid (File)) { | |
1330 | return EFI_INVALID_PARAMETER; | |
1331 | } | |
1332 | ||
1333 | // Don't read past the end of the file. | |
1334 | if ((File->CurrentPosition + *BufferSize) > File->MaxPosition) { | |
1335 | return EFI_END_OF_FILE; | |
1336 | } | |
1337 | ||
1338 | switch (File->Type) { | |
1339 | case EfiOpenLoadFile: | |
1340 | // Figure out the File->Size | |
1341 | EfiTell (File, NULL); | |
1342 | ||
1343 | Status = File->LoadFile->LoadFile (File->LoadFile, File->DevicePath, FALSE, BufferSize, Buffer); | |
1344 | break; | |
1345 | ||
1346 | case EfiOpenFirmwareVolume: | |
1347 | if (CompareGuid (&File->FvNameGuid, &gZeroGuid)) { | |
1348 | // This is the entire FV device, so treat like a memory buffer | |
1349 | CopyMem (Buffer, (VOID *)(UINTN)(File->FvStart + File->CurrentPosition), *BufferSize); | |
1350 | File->CurrentPosition += *BufferSize; | |
1351 | Status = EFI_SUCCESS; | |
1352 | } else { | |
1353 | if (File->Buffer == NULL) { | |
1354 | if (File->FvSectionType == EFI_SECTION_ALL) { | |
1355 | Status = File->Fv->ReadFile ( | |
1356 | File->Fv, | |
1357 | &File->FvNameGuid, | |
1358 | (VOID **)&File->Buffer, | |
1359 | &File->Size, | |
1360 | &File->FvType, | |
1361 | &File->FvAttributes, | |
1362 | &AuthenticationStatus | |
1363 | ); | |
1364 | } else { | |
1365 | Status = File->Fv->ReadSection ( | |
1366 | File->Fv, | |
1367 | &File->FvNameGuid, | |
1368 | File->FvSectionType, | |
1369 | 0, | |
1370 | (VOID **)&File->Buffer, | |
1371 | &File->Size, | |
1372 | &AuthenticationStatus | |
1373 | ); | |
1374 | } | |
1375 | if (EFI_ERROR (Status)) { | |
1376 | return Status; | |
1377 | } | |
1378 | File->IsBufferValid = TRUE; | |
1379 | } | |
1380 | // Operate on the cached buffer so Seek will work | |
1381 | CopyMem (Buffer, File->Buffer + File->CurrentPosition, *BufferSize); | |
1382 | File->CurrentPosition += *BufferSize; | |
1383 | Status = EFI_SUCCESS; | |
1384 | } | |
1385 | break; | |
1386 | ||
1387 | case EfiOpenMemoryBuffer: | |
1388 | CopyMem (Buffer, File->Buffer + File->CurrentPosition, *BufferSize); | |
1389 | File->CurrentPosition += *BufferSize; | |
1390 | Status = EFI_SUCCESS; | |
1391 | break; | |
1392 | ||
1393 | case EfiOpenFileSystem: | |
1394 | Status = File->FsFileHandle->Read (File->FsFileHandle, BufferSize, Buffer); | |
1395 | File->CurrentPosition += *BufferSize; | |
1396 | break; | |
1397 | ||
1398 | case EfiOpenBlockIo: | |
1399 | Status = gBS->HandleProtocol(File->EfiHandle, &gEfiDiskIoProtocolGuid, (VOID **)&DiskIo); | |
1400 | if (!EFI_ERROR(Status)) { | |
1401 | Status = DiskIo->ReadDisk(DiskIo, File->FsBlockIoMedia->MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer); | |
1402 | } | |
1403 | File->CurrentPosition += *BufferSize; | |
1404 | break; | |
1405 | ||
1406 | case EfiOpenTftp: | |
1407 | // Cache the file if it hasn't been cached yet. | |
1408 | if (File->IsBufferValid == FALSE) { | |
1409 | Status = CacheTftpFile (File); | |
1410 | if (EFI_ERROR (Status)) { | |
1411 | return Status; | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | // Copy out the requested data | |
1416 | CopyMem (Buffer, File->Buffer + File->CurrentPosition, *BufferSize); | |
1417 | File->CurrentPosition += *BufferSize; | |
1418 | ||
1419 | Status = EFI_SUCCESS; | |
1420 | break; | |
1421 | ||
1422 | default: | |
1423 | return EFI_INVALID_PARAMETER; | |
1424 | }; | |
1425 | ||
1426 | return Status; | |
1427 | } | |
1428 | ||
1429 | ||
1430 | /** | |
1431 | Read the entire file into a buffer. This routine allocates the buffer and | |
1432 | returns it to the user full of the read data. | |
1433 | ||
1434 | This is very useful for load flie where it's hard to know how big the buffer | |
1435 | must be. | |
1436 | ||
1437 | @param Stream Open File Handle | |
1438 | @param Buffer Pointer to buffer to return. | |
1439 | @param BufferSize Pointer to Size of buffer return.. | |
1440 | ||
1441 | ||
1442 | @return EFI_SUCCESS Stream is not an Open File | |
1443 | @return EFI_END_OF_FILE Tried to read past the end of the file | |
1444 | @return EFI_INVALID_PARAMETER Stream is not an open file handle | |
1445 | @return EFI_BUFFER_TOO_SMALL Buffer is not big enough to do the read | |
1446 | @return "other" Error returned from device read | |
1447 | ||
1448 | **/ | |
1449 | EFI_STATUS | |
1450 | EfiReadAllocatePool ( | |
1451 | IN EFI_OPEN_FILE *File, | |
1452 | OUT VOID **Buffer, | |
1453 | OUT UINTN *BufferSize | |
1454 | ) | |
1455 | { | |
1456 | if (!FileHandleValid (File)) { | |
1457 | return EFI_INVALID_PARAMETER; | |
1458 | } | |
1459 | ||
1460 | // Loadfile defers file size determination on Open so use tell to find it | |
1461 | EfiTell (File, NULL); | |
1462 | ||
1463 | *BufferSize = File->Size; | |
1464 | *Buffer = AllocatePool (*BufferSize); | |
1465 | if (*Buffer == NULL) { | |
1466 | return EFI_NOT_FOUND; | |
1467 | } | |
1468 | ||
1469 | return EfiRead (File, *Buffer, BufferSize); | |
1470 | } | |
1471 | ||
1472 | ||
1473 | /** | |
1474 | Write data back to the file. For TFTP case you must write the entire file. | |
1475 | ||
1476 | @param Stream Open File Handle | |
1477 | @param Buffer Pointer to buffer to return. | |
1478 | @param BufferSize Pointer to Size of buffer return.. | |
1479 | ||
1480 | ||
1481 | @return EFI_SUCCESS Stream is not an Open File | |
1482 | @return EFI_END_OF_FILE Tried to read past the end of the file | |
1483 | @return EFI_INVALID_PARAMETER Stream is not an open file handle | |
1484 | @return EFI_BUFFER_TOO_SMALL Buffer is not big enough to do the read | |
1485 | @return "other" Error returned from device write | |
1486 | ||
1487 | **/ | |
1488 | EFI_STATUS | |
1489 | EfiWrite ( | |
1490 | IN EFI_OPEN_FILE *File, | |
1491 | OUT VOID *Buffer, | |
1492 | OUT UINTN *BufferSize | |
1493 | ) | |
1494 | { | |
1495 | EFI_STATUS Status; | |
1496 | EFI_FV_WRITE_FILE_DATA FileData; | |
1497 | EFI_DISK_IO_PROTOCOL *DiskIo; | |
1498 | ||
1499 | if (!FileHandleValid (File)) { | |
1500 | return EFI_INVALID_PARAMETER; | |
1501 | } | |
1502 | ||
1503 | switch (File->Type) { | |
1504 | case EfiOpenMemoryBuffer: | |
1505 | if ((File->CurrentPosition + *BufferSize) > File->MaxPosition) { | |
1506 | return EFI_END_OF_FILE; | |
1507 | } | |
1508 | ||
1509 | CopyMem (File->Buffer + File->CurrentPosition, Buffer, *BufferSize); | |
1510 | File->CurrentPosition += *BufferSize; | |
1511 | Status = EFI_SUCCESS; | |
1512 | ||
1513 | case EfiOpenLoadFile: | |
1514 | // LoadFile device is read only be definition | |
1515 | Status = EFI_UNSUPPORTED; | |
1516 | ||
1517 | case EfiOpenFirmwareVolume: | |
1518 | if (File->FvSectionType != EFI_SECTION_ALL) { | |
1519 | // Writes not support to a specific section. You have to update entire file | |
1520 | return EFI_UNSUPPORTED; | |
1521 | } | |
1522 | ||
1523 | FileData.NameGuid = &(File->FvNameGuid); | |
1524 | FileData.Type = File->FvType; | |
1525 | FileData.FileAttributes = File->FvAttributes; | |
1526 | FileData.Buffer = Buffer; | |
1527 | FileData.BufferSize = (UINT32)*BufferSize; | |
1528 | Status = File->Fv->WriteFile (File->Fv, 1, EFI_FV_UNRELIABLE_WRITE, &FileData); | |
1529 | break; | |
1530 | ||
1531 | case EfiOpenFileSystem: | |
1532 | Status = File->FsFileHandle->Write (File->FsFileHandle, BufferSize, Buffer); | |
1533 | File->CurrentPosition += *BufferSize; | |
1534 | break; | |
1535 | ||
1536 | case EfiOpenBlockIo: | |
1537 | if ((File->CurrentPosition + *BufferSize) > File->MaxPosition) { | |
1538 | return EFI_END_OF_FILE; | |
1539 | } | |
1540 | ||
1541 | Status = gBS->HandleProtocol (File->EfiHandle, &gEfiDiskIoProtocolGuid, (VOID **)&DiskIo); | |
1542 | if (!EFI_ERROR(Status)) { | |
1543 | Status = DiskIo->WriteDisk (DiskIo, File->FsBlockIoMedia->MediaId, File->DiskOffset + File->CurrentPosition, *BufferSize, Buffer); | |
1544 | } | |
1545 | File->CurrentPosition += *BufferSize; | |
1546 | break; | |
1547 | ||
1548 | case EfiOpenTftp: | |
1549 | // Cache the file if it hasn't been cached yet. | |
1550 | if (File->IsBufferValid == FALSE) { | |
1551 | Status = CacheTftpFile(File); | |
1552 | if (EFI_ERROR(Status)) { | |
1553 | return Status; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | // Don't overwrite the buffer | |
1558 | if ((File->CurrentPosition + *BufferSize) > File->MaxPosition) { | |
1559 | UINT8 *TempBuffer; | |
1560 | ||
1561 | TempBuffer = File->Buffer; | |
1562 | ||
1563 | File->Buffer = AllocatePool ((UINTN)(File->CurrentPosition + *BufferSize)); | |
1564 | if (File->Buffer == NULL) { | |
1565 | return EFI_OUT_OF_RESOURCES; | |
1566 | } | |
1567 | ||
1568 | CopyMem (File->Buffer, TempBuffer, File->Size); | |
1569 | ||
1570 | FreePool (TempBuffer); | |
1571 | ||
1572 | File->Size = (UINTN)(File->CurrentPosition + *BufferSize); | |
1573 | File->MaxPosition = (UINT64)File->Size; | |
1574 | } | |
1575 | ||
1576 | // Copy in the requested data | |
1577 | CopyMem (File->Buffer + File->CurrentPosition, Buffer, *BufferSize); | |
1578 | File->CurrentPosition += *BufferSize; | |
1579 | ||
1580 | // Mark the file dirty | |
1581 | File->IsDirty = TRUE; | |
1582 | ||
1583 | Status = EFI_SUCCESS; | |
1584 | break; | |
1585 | ||
1586 | default: | |
1587 | Status = EFI_INVALID_PARAMETER; | |
1588 | }; | |
1589 | ||
1590 | return Status; | |
1591 | } | |
1592 | ||
1593 | ||
1594 | /** | |
1595 | Given Cwd expand Path to remove .. and replace them with real | |
1596 | directory names. | |
1597 | ||
1598 | @param Cwd Current Working Directory | |
1599 | @param Path Path to expand | |
1600 | ||
1601 | @return NULL Cwd or Path are not valid | |
1602 | @return 'other' Path with .. expanded | |
1603 | ||
1604 | **/ | |
1605 | CHAR8 * | |
1606 | ExpandPath ( | |
1607 | IN CHAR8 *Cwd, | |
1608 | IN CHAR8 *Path | |
1609 | ) | |
1610 | { | |
1611 | CHAR8 *NewPath; | |
1612 | CHAR8 *Work, *Start, *End; | |
1613 | UINTN StrLen; | |
1614 | INTN i; | |
1615 | ||
1616 | if (Cwd == NULL || Path == NULL) { | |
1617 | return NULL; | |
1618 | } | |
1619 | ||
1620 | StrLen = AsciiStrSize (Cwd); | |
1621 | if (StrLen <= 2) { | |
1622 | // Smallest valid path is 1 char and a null | |
1623 | return NULL; | |
1624 | } | |
1625 | ||
1626 | StrLen = AsciiStrSize (Path); | |
1627 | NewPath = AllocatePool (AsciiStrSize (Cwd) + StrLen + 1); | |
1628 | if (NewPath == NULL) { | |
1629 | return NULL; | |
1630 | } | |
1631 | AsciiStrCpy (NewPath, Cwd); | |
1632 | ||
1633 | End = Path + StrLen; | |
1634 | for (Start = Path ;;) { | |
1635 | Work = AsciiStrStr (Start, "..") ; | |
1636 | if (Work == NULL) { | |
1637 | // Remaining part of Path contains no more .. | |
1638 | break; | |
1639 | } | |
1640 | ||
1641 | // append path prior to .. | |
1642 | AsciiStrnCat (NewPath, Start, Work - Start); | |
1643 | StrLen = AsciiStrLen (NewPath); | |
1644 | for (i = StrLen; i >= 0; i--) { | |
1645 | if (NewPath[i] == ':') { | |
1646 | // too many .. | |
1647 | return NULL; | |
1648 | } | |
1649 | if (NewPath[i] == '/' || NewPath[i] == '\\') { | |
1650 | if ((i > 0) && (NewPath[i-1] == ':')) { | |
1651 | // leave the / before a : | |
1652 | NewPath[i+1] = '\0'; | |
1653 | } else { | |
1654 | // replace / will Null to remove trailing file/dir reference | |
1655 | NewPath[i] = '\0'; | |
1656 | } | |
1657 | break; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | Start = Work + 3; | |
1662 | } | |
1663 | ||
1664 | // Handle the path that remains after the .. | |
1665 | AsciiStrnCat (NewPath, Start, End - Start); | |
1666 | ||
1667 | return NewPath; | |
1668 | } | |
1669 | ||
1670 | ||
1671 | /** | |
1672 | Set the Curent Working Directory (CWD). If a call is made to EfiOpen () and | |
1673 | the path does not contain a device name, The CWD is prepended to the path. | |
1674 | ||
1675 | @param Cwd Current Working Directory to set | |
1676 | ||
1677 | ||
1678 | @return EFI_SUCCESS CWD is set | |
1679 | @return EFI_INVALID_PARAMETER Cwd is not a valid device:path | |
1680 | ||
1681 | **/ | |
1682 | EFI_STATUS | |
1683 | EfiSetCwd ( | |
1684 | IN CHAR8 *Cwd | |
1685 | ) | |
1686 | { | |
1687 | EFI_OPEN_FILE *File; | |
1688 | UINTN Len; | |
1689 | CHAR8 *Path; | |
1690 | ||
1691 | if (Cwd == NULL) { | |
1692 | return EFI_INVALID_PARAMETER; | |
1693 | } | |
1694 | ||
1695 | if (AsciiStrCmp (Cwd, ".") == 0) { | |
1696 | // cd . is a no-op | |
1697 | return EFI_SUCCESS; | |
1698 | } | |
1699 | ||
1700 | Path = Cwd; | |
1701 | if (AsciiStrStr (Cwd, "..") != NULL) { | |
1702 | if (gCwd == NULL) { | |
1703 | // no parent | |
1704 | return EFI_SUCCESS; | |
1705 | } | |
1706 | ||
1707 | Len = AsciiStrLen (gCwd); | |
1708 | if ((gCwd[Len-2] == ':') && ((gCwd[Len-1] == '/') || (gCwd[Len-1] == '\\'))) { | |
1709 | // parent is device so nothing to do | |
1710 | return EFI_SUCCESS; | |
1711 | } | |
1712 | ||
1713 | // Expand .. in Cwd, given we know current working directory | |
1714 | Path = ExpandPath (gCwd, Cwd); | |
1715 | if (Path == NULL) { | |
1716 | return EFI_NOT_FOUND; | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | File = EfiOpen (Path, EFI_FILE_MODE_READ, 0); | |
1721 | if (File == NULL) { | |
1722 | return EFI_INVALID_PARAMETER; | |
1723 | } | |
1724 | ||
1725 | if (gCwd != NULL) { | |
1726 | FreePool (gCwd); | |
1727 | } | |
1728 | ||
1729 | // Use the info returned from EfiOpen as it can add in CWD if needed. So Cwd could be | |
1730 | // relative to the current gCwd or not. | |
1731 | gCwd = AllocatePool (AsciiStrSize (File->DeviceName) + AsciiStrSize (File->FileName) + 10); | |
1732 | if (gCwd == NULL) { | |
1733 | return EFI_INVALID_PARAMETER; | |
1734 | } | |
1735 | ||
1736 | AsciiStrCpy (gCwd, File->DeviceName); | |
1737 | if (File->FileName == NULL) { | |
1738 | AsciiStrCat (gCwd, ":\\"); | |
1739 | } else { | |
1740 | AsciiStrCat (gCwd, ":"); | |
1741 | AsciiStrCat (gCwd, File->FileName); | |
1742 | } | |
1743 | ||
1744 | ||
1745 | EfiClose (File); | |
1746 | if (Path != Cwd) { | |
1747 | FreePool (Path); | |
1748 | } | |
1749 | return EFI_SUCCESS; | |
1750 | } | |
1751 | ||
1752 | ||
1753 | /** | |
1754 | Set the Curent Working Directory (CWD). If a call is made to EfiOpen () and | |
1755 | the path does not contain a device name, The CWD is prepended to the path. | |
1756 | The CWD buffer is only valid until a new call is made to EfiSetCwd(). After | |
1757 | a call to EfiSetCwd() it is not legal to use the pointer returned by | |
1758 | this funciton. | |
1759 | ||
1760 | @param Cwd Current Working Directory | |
1761 | ||
1762 | ||
1763 | @return "" No CWD set | |
1764 | @return 'other' Returns buffer that contains CWD. | |
1765 | ||
1766 | **/ | |
1767 | CHAR8 * | |
1768 | EfiGetCwd ( | |
1769 | VOID | |
1770 | ) | |
1771 | { | |
1772 | if (gCwd == NULL) { | |
1773 | return ""; | |
1774 | } | |
1775 | return gCwd; | |
1776 | } | |
1777 | ||
1778 |