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1 /*
2 * refind/config.c
3 * Configuration file functions
4 *
5 * Copyright (c) 2006 Christoph Pfisterer
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * * Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the
18 * distribution.
19 *
20 * * Neither the name of Christoph Pfisterer nor the names of the
21 * contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 /*
38 * Modifications copyright (c) 2012-2015 Roderick W. Smith
39 *
40 * Modifications distributed under the terms of the GNU General Public
41 * License (GPL) version 3 (GPLv3), a copy of which must be distributed
42 * with this source code or binaries made from it.
43 *
44 */
45
46 #include "global.h"
47 #include "lib.h"
48 #include "icns.h"
49 #include "menu.h"
50 #include "config.h"
51 #include "screen.h"
52 #include "../include/refit_call_wrapper.h"
53 #include "../mok/mok.h"
54
55 // constants
56
57 #define LINUX_OPTIONS_FILENAMES L"refind_linux.conf,refind-linux.conf"
58 #define MAXCONFIGFILESIZE (128*1024)
59
60 #define ENCODING_ISO8859_1 (0)
61 #define ENCODING_UTF8 (1)
62 #define ENCODING_UTF16_LE (2)
63
64 #define GetTime ST->RuntimeServices->GetTime
65 #define LAST_MINUTE 1439 /* Last minute of a day */
66
67 extern REFIT_MENU_ENTRY MenuEntryReturn;
68 //static REFIT_MENU_ENTRY MenuEntryReturn = { L"Return to Main Menu", TAG_RETURN, 0, 0, 0, NULL, NULL, NULL };
69
70 //
71 // read a file into a buffer
72 //
73
74 EFI_STATUS ReadFile(IN EFI_FILE_HANDLE BaseDir, IN CHAR16 *FileName, IN OUT REFIT_FILE *File, OUT UINTN *size)
75 {
76 EFI_STATUS Status;
77 EFI_FILE_HANDLE FileHandle;
78 EFI_FILE_INFO *FileInfo;
79 UINT64 ReadSize;
80 CHAR16 Message[256];
81
82 File->Buffer = NULL;
83 File->BufferSize = 0;
84
85 // read the file, allocating a buffer on the way
86 Status = refit_call5_wrapper(BaseDir->Open, BaseDir, &FileHandle, FileName, EFI_FILE_MODE_READ, 0);
87 SPrint(Message, 255, L"while loading the file '%s'", FileName);
88 if (CheckError(Status, Message))
89 return Status;
90
91 FileInfo = LibFileInfo(FileHandle);
92 if (FileInfo == NULL) {
93 // TODO: print and register the error
94 refit_call1_wrapper(FileHandle->Close, FileHandle);
95 return EFI_LOAD_ERROR;
96 }
97 ReadSize = FileInfo->FileSize;
98 FreePool(FileInfo);
99
100 File->BufferSize = (UINTN)ReadSize;
101 File->Buffer = AllocatePool(File->BufferSize);
102 if (File->Buffer == NULL) {
103 size = 0;
104 return EFI_OUT_OF_RESOURCES;
105 } else {
106 *size = File->BufferSize;
107 } // if/else
108 Status = refit_call3_wrapper(FileHandle->Read, FileHandle, &File->BufferSize, File->Buffer);
109 if (CheckError(Status, Message)) {
110 MyFreePool(File->Buffer);
111 File->Buffer = NULL;
112 refit_call1_wrapper(FileHandle->Close, FileHandle);
113 return Status;
114 }
115 Status = refit_call1_wrapper(FileHandle->Close, FileHandle);
116
117 // setup for reading
118 File->Current8Ptr = (CHAR8 *)File->Buffer;
119 File->End8Ptr = File->Current8Ptr + File->BufferSize;
120 File->Current16Ptr = (CHAR16 *)File->Buffer;
121 File->End16Ptr = File->Current16Ptr + (File->BufferSize >> 1);
122
123 // detect encoding
124 File->Encoding = ENCODING_ISO8859_1; // default: 1:1 translation of CHAR8 to CHAR16
125 if (File->BufferSize >= 4) {
126 if (File->Buffer[0] == 0xFF && File->Buffer[1] == 0xFE) {
127 // BOM in UTF-16 little endian (or UTF-32 little endian)
128 File->Encoding = ENCODING_UTF16_LE; // use CHAR16 as is
129 File->Current16Ptr++;
130 } else if (File->Buffer[0] == 0xEF && File->Buffer[1] == 0xBB && File->Buffer[2] == 0xBF) {
131 // BOM in UTF-8
132 File->Encoding = ENCODING_UTF8; // translate from UTF-8 to UTF-16
133 File->Current8Ptr += 3;
134 } else if (File->Buffer[1] == 0 && File->Buffer[3] == 0) {
135 File->Encoding = ENCODING_UTF16_LE; // use CHAR16 as is
136 }
137 // TODO: detect other encodings as they are implemented
138 }
139
140 return EFI_SUCCESS;
141 }
142
143 //
144 // get a single line of text from a file
145 //
146
147 static CHAR16 *ReadLine(REFIT_FILE *File)
148 {
149 CHAR16 *Line, *q;
150 UINTN LineLength;
151
152 if (File->Buffer == NULL)
153 return NULL;
154
155 if (File->Encoding == ENCODING_ISO8859_1 || File->Encoding == ENCODING_UTF8) {
156
157 CHAR8 *p, *LineStart, *LineEnd;
158
159 p = File->Current8Ptr;
160 if (p >= File->End8Ptr)
161 return NULL;
162
163 LineStart = p;
164 for (; p < File->End8Ptr; p++)
165 if (*p == 13 || *p == 10)
166 break;
167 LineEnd = p;
168 for (; p < File->End8Ptr; p++)
169 if (*p != 13 && *p != 10)
170 break;
171 File->Current8Ptr = p;
172
173 LineLength = (UINTN)(LineEnd - LineStart) + 1;
174 Line = AllocatePool(LineLength * sizeof(CHAR16));
175 if (Line == NULL)
176 return NULL;
177
178 q = Line;
179 if (File->Encoding == ENCODING_ISO8859_1) {
180 for (p = LineStart; p < LineEnd; )
181 *q++ = *p++;
182 } else if (File->Encoding == ENCODING_UTF8) {
183 // TODO: actually handle UTF-8
184 for (p = LineStart; p < LineEnd; )
185 *q++ = *p++;
186 }
187 *q = 0;
188
189 } else if (File->Encoding == ENCODING_UTF16_LE) {
190
191 CHAR16 *p, *LineStart, *LineEnd;
192
193 p = File->Current16Ptr;
194 if (p >= File->End16Ptr)
195 return NULL;
196
197 LineStart = p;
198 for (; p < File->End16Ptr; p++)
199 if (*p == 13 || *p == 10)
200 break;
201 LineEnd = p;
202 for (; p < File->End16Ptr; p++)
203 if (*p != 13 && *p != 10)
204 break;
205 File->Current16Ptr = p;
206
207 LineLength = (UINTN)(LineEnd - LineStart) + 1;
208 Line = AllocatePool(LineLength * sizeof(CHAR16));
209 if (Line == NULL)
210 return NULL;
211
212 for (p = LineStart, q = Line; p < LineEnd; )
213 *q++ = *p++;
214 *q = 0;
215
216 } else
217 return NULL; // unsupported encoding
218
219 return Line;
220 }
221
222 // Returns FALSE if *p points to the end of a token, TRUE otherwise.
223 // Also modifies *p **IF** the first and second characters are both
224 // quotes ('"'); it deletes one of them.
225 static BOOLEAN KeepReading(IN OUT CHAR16 *p, IN OUT BOOLEAN *IsQuoted) {
226 BOOLEAN MoreToRead = FALSE;
227 CHAR16 *Temp = NULL;
228
229 if ((p == NULL) || (IsQuoted == NULL))
230 return FALSE;
231
232 if (*p == L'\0')
233 return FALSE;
234
235 if ((*p != ' ' && *p != '\t' && *p != '=' && *p != '#' && *p != ',') || *IsQuoted) {
236 MoreToRead = TRUE;
237 }
238 if (*p == L'"') {
239 if (p[1] == L'"') {
240 Temp = StrDuplicate(&p[1]);
241 if (Temp != NULL) {
242 StrCpy(p, Temp);
243 FreePool(Temp);
244 }
245 MoreToRead = TRUE;
246 } else {
247 *IsQuoted = !(*IsQuoted);
248 MoreToRead = FALSE;
249 } // if/else second character is a quote
250 } // if first character is a quote
251
252 return MoreToRead;
253 } // BOOLEAN KeepReading()
254
255 //
256 // get a line of tokens from a file
257 //
258 UINTN ReadTokenLine(IN REFIT_FILE *File, OUT CHAR16 ***TokenList)
259 {
260 BOOLEAN LineFinished, IsQuoted = FALSE;
261 CHAR16 *Line, *Token, *p;
262 UINTN TokenCount = 0;
263
264 *TokenList = NULL;
265
266 while (TokenCount == 0) {
267 Line = ReadLine(File);
268 if (Line == NULL)
269 return(0);
270
271 p = Line;
272 LineFinished = FALSE;
273 while (!LineFinished) {
274 // skip whitespace & find start of token
275 while ((*p == ' ' || *p == '\t' || *p == '=' || *p == ',') && !IsQuoted)
276 p++;
277 if (*p == 0 || *p == '#')
278 break;
279
280 if (*p == '"') {
281 IsQuoted = !IsQuoted;
282 p++;
283 } // if
284 Token = p;
285
286 // find end of token
287 while (KeepReading(p, &IsQuoted)) {
288 if ((*p == L'/') && !IsQuoted) // Switch Unix-style to DOS-style directory separators
289 *p = L'\\';
290 p++;
291 } // while
292 if (*p == L'\0' || *p == L'#')
293 LineFinished = TRUE;
294 *p++ = 0;
295
296 AddListElement((VOID ***)TokenList, &TokenCount, (VOID *)StrDuplicate(Token));
297 }
298
299 FreePool(Line);
300 }
301 return (TokenCount);
302 } /* ReadTokenLine() */
303
304 VOID FreeTokenLine(IN OUT CHAR16 ***TokenList, IN OUT UINTN *TokenCount)
305 {
306 // TODO: also free the items
307 FreeList((VOID ***)TokenList, TokenCount);
308 }
309
310 // handle a parameter with a single integer argument
311 static VOID HandleInt(IN CHAR16 **TokenList, IN UINTN TokenCount, OUT UINTN *Value)
312 {
313 if (TokenCount == 2) {
314 if (StriCmp(TokenList[1], L"-1") == 0)
315 *Value = -1;
316 else
317 *Value = Atoi(TokenList[1]);
318 }
319 }
320
321 // handle a parameter with a single string argument
322 static VOID HandleString(IN CHAR16 **TokenList, IN UINTN TokenCount, OUT CHAR16 **Target) {
323 if ((TokenCount == 2) && Target) {
324 if ((StrLen(TokenList[1]) > 1) && (TokenList[1][0] == L'+') &&
325 ((TokenList[1][1] == L',') || (TokenList[1][1] == L' '))) {
326 if (*Target) {
327 MergeStrings(Target, TokenList[1] + 2, L',');
328 } else {
329 *Target = StrDuplicate(TokenList[1] + 2);
330 } // if/else
331 } else {
332 MyFreePool(*Target);
333 *Target = StrDuplicate(TokenList[1]);
334 } // if/else
335 } // if
336 } // static VOID HandleString()
337
338 // Handle a parameter with a series of string arguments, to replace or be added to a
339 // comma-delimited list. Passes each token through the CleanUpPathNameSlashes() function
340 // to ensure consistency in subsequent comparisons of filenames. If the first
341 // non-keyword token is "+", the list is added to the existing target string; otherwise,
342 // the tokens replace the current string.
343 static VOID HandleStrings(IN CHAR16 **TokenList, IN UINTN TokenCount, OUT CHAR16 **Target) {
344 UINTN i;
345 BOOLEAN AddMode = FALSE;
346
347 if ((TokenCount > 2) && (StriCmp(TokenList[1], L"+") == 0)) {
348 AddMode = TRUE;
349 }
350
351 if ((*Target != NULL) && !AddMode) {
352 FreePool(*Target);
353 *Target = NULL;
354 } // if
355 for (i = 1; i < TokenCount; i++) {
356 if ((i != 1) || !AddMode) {
357 CleanUpPathNameSlashes(TokenList[i]);
358 MergeStrings(Target, TokenList[i], L',');
359 } // if
360 } // for
361 } // static VOID HandleStrings()
362
363 // Convert TimeString (in "HH:MM" format) to a pure-minute format. Values should be
364 // in the range from 0 (for 00:00, or midnight) to 1439 (for 23:59; aka LAST_MINUTE).
365 // Any value outside that range denotes an error in the specification. Note that if
366 // the input is a number that includes no colon, this function will return the original
367 // number in UINTN form.
368 static UINTN HandleTime(IN CHAR16 *TimeString) {
369 UINTN Hour = 0, Minute = 0, TimeLength, i = 0;
370
371 TimeLength = StrLen(TimeString);
372 while (i < TimeLength) {
373 if (TimeString[i] == L':') {
374 Hour = Minute;
375 Minute = 0;
376 } // if
377 if ((TimeString[i] >= L'0') && (TimeString[i] <= '9')) {
378 Minute *= 10;
379 Minute += (TimeString[i] - L'0');
380 } // if
381 i++;
382 } // while
383 return (Hour * 60 + Minute);
384 } // BOOLEAN HandleTime()
385
386 static BOOLEAN HandleBoolean(IN CHAR16 **TokenList, IN UINTN TokenCount) {
387 BOOLEAN TruthValue = TRUE;
388
389 if ((TokenCount >= 2) && ((StriCmp(TokenList[1], L"0") == 0) ||
390 (StriCmp(TokenList[1], L"false") == 0) ||
391 (StriCmp(TokenList[1], L"off") == 0))) {
392 TruthValue = FALSE;
393 } // if
394
395 return TruthValue;
396 } // BOOLEAN HandleBoolean
397
398 // Sets the default boot loader IF the current time is within the bounds
399 // defined by the third and fourth tokens in the TokenList.
400 static VOID SetDefaultByTime(IN CHAR16 **TokenList, OUT CHAR16 **Default) {
401 EFI_STATUS Status;
402 EFI_TIME CurrentTime;
403 UINTN StartTime, EndTime, Now;
404 BOOLEAN SetIt = FALSE;
405
406 StartTime = HandleTime(TokenList[2]);
407 EndTime = HandleTime(TokenList[3]);
408
409 if ((StartTime <= LAST_MINUTE) && (EndTime <= LAST_MINUTE)) {
410 Status = refit_call2_wrapper(GetTime, &CurrentTime, NULL);
411 if (Status != EFI_SUCCESS)
412 return;
413 Now = CurrentTime.Hour * 60 + CurrentTime.Minute;
414
415 if (Now > LAST_MINUTE) { // Shouldn't happen; just being paranoid
416 Print(L"Warning: Impossible system time: %d:%d\n", CurrentTime.Hour, CurrentTime.Minute);
417 return;
418 } // if impossible time
419
420 if (StartTime < EndTime) { // Time range does NOT cross midnight
421 if ((Now >= StartTime) && (Now <= EndTime))
422 SetIt = TRUE;
423 } else { // Time range DOES cross midnight
424 if ((Now >= StartTime) && (Now <= EndTime))
425 SetIt = TRUE;
426 } // if/else time range crosses midnight
427
428 if (SetIt) {
429 MyFreePool(*Default);
430 *Default = StrDuplicate(TokenList[1]);
431 } // if (SetIt)
432 } // if ((StartTime <= LAST_MINUTE) && (EndTime <= LAST_MINUTE))
433 } // VOID SetDefaultByTime()
434
435 // read config file
436 VOID ReadConfig(CHAR16 *FileName)
437 {
438 EFI_STATUS Status;
439 REFIT_FILE File;
440 CHAR16 **TokenList;
441 CHAR16 *FlagName;
442 CHAR16 *TempStr = NULL;
443 UINTN TokenCount, i;
444 EFI_GUID RefindGuid = REFIND_GUID_VALUE;
445
446 // Set a few defaults only if we're loading the default file.
447 if (StriCmp(FileName, GlobalConfig.ConfigFilename) == 0) {
448 MyFreePool(GlobalConfig.AlsoScan);
449 GlobalConfig.AlsoScan = StrDuplicate(ALSO_SCAN_DIRS);
450 MyFreePool(GlobalConfig.DontScanDirs);
451 if (SelfVolume) {
452 if (SelfVolume->VolName) {
453 TempStr = SelfVolume->VolName ? StrDuplicate(SelfVolume->VolName) : NULL;
454 } else {
455 TempStr = AllocateZeroPool(256 * sizeof(CHAR16));
456 if (TempStr != NULL)
457 SPrint(TempStr, 255, L"fs%d", SelfVolume->VolNumber);
458 } // if/else
459 }
460 MergeStrings(&TempStr, SelfDirPath, L':');
461 MergeStrings(&TempStr, MEMTEST_LOCATIONS, L',');
462 GlobalConfig.DontScanDirs = TempStr;
463 MyFreePool(GlobalConfig.DontScanFiles);
464 GlobalConfig.DontScanFiles = StrDuplicate(DONT_SCAN_FILES);
465 MergeStrings(&(GlobalConfig.DontScanFiles), MOK_NAMES, L',');
466 MyFreePool(GlobalConfig.DontScanVolumes);
467 GlobalConfig.DontScanVolumes = StrDuplicate(DONT_SCAN_VOLUMES);
468 GlobalConfig.WindowsRecoveryFiles = StrDuplicate(WINDOWS_RECOVERY_FILES);
469 if (GlobalConfig.DefaultSelection != NULL) {
470 MyFreePool(GlobalConfig.DefaultSelection);
471 GlobalConfig.DefaultSelection = NULL;
472 }
473 Status = EfivarGetRaw(&RefindGuid, L"PreviousBoot", (CHAR8**) &(GlobalConfig.DefaultSelection), &i);
474 if (Status != EFI_SUCCESS)
475 GlobalConfig.DefaultSelection = NULL;
476 } // if
477
478 if (!FileExists(SelfDir, FileName)) {
479 Print(L"Configuration file '%s' missing!\n", FileName);
480 if (!FileExists(SelfDir, L"icons")) {
481 Print(L"Icons directory doesn't exist; setting textonly = TRUE!\n");
482 GlobalConfig.TextOnly = TRUE;
483 }
484 return;
485 }
486
487 Status = ReadFile(SelfDir, FileName, &File, &i);
488 if (EFI_ERROR(Status))
489 return;
490
491 for (;;) {
492 TokenCount = ReadTokenLine(&File, &TokenList);
493 if (TokenCount == 0)
494 break;
495
496 if (StriCmp(TokenList[0], L"timeout") == 0) {
497 HandleInt(TokenList, TokenCount, &(GlobalConfig.Timeout));
498
499 } else if (StriCmp(TokenList[0], L"hideui") == 0) {
500 for (i = 1; i < TokenCount; i++) {
501 FlagName = TokenList[i];
502 if (StriCmp(FlagName, L"banner") == 0) {
503 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_BANNER;
504 } else if (StriCmp(FlagName, L"label") == 0) {
505 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_LABEL;
506 } else if (StriCmp(FlagName, L"singleuser") == 0) {
507 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_SINGLEUSER;
508 } else if (StriCmp(FlagName, L"hwtest") == 0) {
509 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_HWTEST;
510 } else if (StriCmp(FlagName, L"arrows") == 0) {
511 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_ARROWS;
512 } else if (StriCmp(FlagName, L"hints") == 0) {
513 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_HINTS;
514 } else if (StriCmp(FlagName, L"editor") == 0) {
515 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_EDITOR;
516 } else if (StriCmp(FlagName, L"safemode") == 0) {
517 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_SAFEMODE;
518 } else if (StriCmp(FlagName, L"badges") == 0) {
519 GlobalConfig.HideUIFlags |= HIDEUI_FLAG_BADGES;
520 } else if (StriCmp(FlagName, L"all") == 0) {
521 GlobalConfig.HideUIFlags = HIDEUI_FLAG_ALL;
522 } else {
523 Print(L" unknown hideui flag: '%s'\n", FlagName);
524 }
525 }
526
527 } else if (StriCmp(TokenList[0], L"icons_dir") == 0) {
528 HandleString(TokenList, TokenCount, &(GlobalConfig.IconsDir));
529
530 } else if (StriCmp(TokenList[0], L"scanfor") == 0) {
531 for (i = 0; i < NUM_SCAN_OPTIONS; i++) {
532 if (i < TokenCount)
533 GlobalConfig.ScanFor[i] = TokenList[i][0];
534 else
535 GlobalConfig.ScanFor[i] = ' ';
536 }
537
538 } else if (StriCmp(TokenList[0], L"uefi_deep_legacy_scan") == 0) {
539 GlobalConfig.DeepLegacyScan = HandleBoolean(TokenList, TokenCount);
540
541 } else if ((StriCmp(TokenList[0], L"scan_delay") == 0) && (TokenCount == 2)) {
542 HandleInt(TokenList, TokenCount, &(GlobalConfig.ScanDelay));
543
544 } else if (StriCmp(TokenList[0], L"also_scan_dirs") == 0) {
545 HandleStrings(TokenList, TokenCount, &(GlobalConfig.AlsoScan));
546
547 } else if ((StriCmp(TokenList[0], L"don't_scan_volumes") == 0) || (StriCmp(TokenList[0], L"dont_scan_volumes") == 0)) {
548 // Note: Don't use HandleStrings() because it modifies slashes, which might be present in volume name
549 MyFreePool(GlobalConfig.DontScanVolumes);
550 GlobalConfig.DontScanVolumes = NULL;
551 for (i = 1; i < TokenCount; i++) {
552 MergeStrings(&GlobalConfig.DontScanVolumes, TokenList[i], L',');
553 }
554
555 } else if ((StriCmp(TokenList[0], L"don't_scan_dirs") == 0) || (StriCmp(TokenList[0], L"dont_scan_dirs") == 0)) {
556 HandleStrings(TokenList, TokenCount, &(GlobalConfig.DontScanDirs));
557
558 } else if ((StriCmp(TokenList[0], L"don't_scan_files") == 0) || (StriCmp(TokenList[0], L"dont_scan_files") == 0)) {
559 HandleStrings(TokenList, TokenCount, &(GlobalConfig.DontScanFiles));
560
561 } else if (StriCmp(TokenList[0], L"windows_recovery_files") == 0) {
562 HandleStrings(TokenList, TokenCount, &(GlobalConfig.WindowsRecoveryFiles));
563
564 } else if (StriCmp(TokenList[0], L"scan_driver_dirs") == 0) {
565 HandleStrings(TokenList, TokenCount, &(GlobalConfig.DriverDirs));
566
567 } else if (StriCmp(TokenList[0], L"showtools") == 0) {
568 SetMem(GlobalConfig.ShowTools, NUM_TOOLS * sizeof(UINTN), 0);
569 for (i = 1; (i < TokenCount) && (i < NUM_TOOLS); i++) {
570 FlagName = TokenList[i];
571 if (StriCmp(FlagName, L"shell") == 0) {
572 GlobalConfig.ShowTools[i - 1] = TAG_SHELL;
573 } else if (StriCmp(FlagName, L"gptsync") == 0) {
574 GlobalConfig.ShowTools[i - 1] = TAG_GPTSYNC;
575 } else if (StriCmp(FlagName, L"gdisk") == 0) {
576 GlobalConfig.ShowTools[i - 1] = TAG_GDISK;
577 } else if (StriCmp(FlagName, L"about") == 0) {
578 GlobalConfig.ShowTools[i - 1] = TAG_ABOUT;
579 } else if (StriCmp(FlagName, L"exit") == 0) {
580 GlobalConfig.ShowTools[i - 1] = TAG_EXIT;
581 } else if (StriCmp(FlagName, L"reboot") == 0) {
582 GlobalConfig.ShowTools[i - 1] = TAG_REBOOT;
583 } else if (StriCmp(FlagName, L"shutdown") == 0) {
584 GlobalConfig.ShowTools[i - 1] = TAG_SHUTDOWN;
585 } else if (StriCmp(FlagName, L"apple_recovery") == 0) {
586 GlobalConfig.ShowTools[i - 1] = TAG_APPLE_RECOVERY;
587 } else if (StriCmp(FlagName, L"windows_recovery") == 0) {
588 GlobalConfig.ShowTools[i - 1] = TAG_WINDOWS_RECOVERY;
589 } else if (StriCmp(FlagName, L"mok_tool") == 0) {
590 GlobalConfig.ShowTools[i - 1] = TAG_MOK_TOOL;
591 } else if (StriCmp(FlagName, L"firmware") == 0) {
592 GlobalConfig.ShowTools[i - 1] = TAG_FIRMWARE;
593 } else if ((StriCmp(FlagName, L"memtest86") == 0) || (StriCmp(FlagName, L"memtest") == 0)) {
594 GlobalConfig.ShowTools[i - 1] = TAG_MEMTEST;
595 } else if (StriCmp(FlagName, L"netboot") == 0) {
596 GlobalConfig.ShowTools[i - 1] = TAG_NETBOOT;
597 } else {
598 Print(L" unknown showtools flag: '%s'\n", FlagName);
599 }
600 } // showtools options
601
602 } else if (StriCmp(TokenList[0], L"banner") == 0) {
603 HandleString(TokenList, TokenCount, &(GlobalConfig.BannerFileName));
604
605 } else if ((StriCmp(TokenList[0], L"banner_scale") == 0) && (TokenCount == 2)) {
606 if (StriCmp(TokenList[1], L"noscale") == 0) {
607 GlobalConfig.BannerScale = BANNER_NOSCALE;
608 } else if ((StriCmp(TokenList[1], L"fillscreen") == 0) || (StriCmp(TokenList[1], L"fullscreen") == 0)) {
609 GlobalConfig.BannerScale = BANNER_FILLSCREEN;
610 } else {
611 Print(L" unknown banner_type flag: '%s'\n", TokenList[1]);
612 } // if/else
613
614 } else if ((StriCmp(TokenList[0], L"small_icon_size") == 0) && (TokenCount == 2)) {
615 HandleInt(TokenList, TokenCount, &i);
616 if (i >= 32)
617 GlobalConfig.IconSizes[ICON_SIZE_SMALL] = i;
618
619 } else if ((StriCmp(TokenList[0], L"big_icon_size") == 0) && (TokenCount == 2)) {
620 HandleInt(TokenList, TokenCount, &i);
621 if (i >= 32) {
622 GlobalConfig.IconSizes[ICON_SIZE_BIG] = i;
623 GlobalConfig.IconSizes[ICON_SIZE_BADGE] = i / 4;
624 }
625
626 } else if (StriCmp(TokenList[0], L"selection_small") == 0) {
627 HandleString(TokenList, TokenCount, &(GlobalConfig.SelectionSmallFileName));
628
629 } else if (StriCmp(TokenList[0], L"selection_big") == 0) {
630 HandleString(TokenList, TokenCount, &(GlobalConfig.SelectionBigFileName));
631
632 } else if (StriCmp(TokenList[0], L"default_selection") == 0) {
633 if (TokenCount == 4) {
634 SetDefaultByTime(TokenList, &(GlobalConfig.DefaultSelection));
635 } else {
636 HandleString(TokenList, TokenCount, &(GlobalConfig.DefaultSelection));
637 }
638
639 } else if (StriCmp(TokenList[0], L"textonly") == 0) {
640 GlobalConfig.TextOnly = HandleBoolean(TokenList, TokenCount);
641
642 } else if (StriCmp(TokenList[0], L"textmode") == 0) {
643 HandleInt(TokenList, TokenCount, &(GlobalConfig.RequestedTextMode));
644
645 } else if ((StriCmp(TokenList[0], L"resolution") == 0) && ((TokenCount == 2) || (TokenCount == 3))) {
646 GlobalConfig.RequestedScreenWidth = Atoi(TokenList[1]);
647 if (TokenCount == 3)
648 GlobalConfig.RequestedScreenHeight = Atoi(TokenList[2]);
649 else
650 GlobalConfig.RequestedScreenHeight = 0;
651
652 } else if (StriCmp(TokenList[0], L"screensaver") == 0) {
653 HandleInt(TokenList, TokenCount, &(GlobalConfig.ScreensaverTime));
654
655 } else if (StriCmp(TokenList[0], L"use_graphics_for") == 0) {
656 if ((TokenCount == 2) || ((TokenCount > 2) && (StriCmp(TokenList[1], L"+") != 0)))
657 GlobalConfig.GraphicsFor = 0;
658 for (i = 1; i < TokenCount; i++) {
659 if (StriCmp(TokenList[i], L"osx") == 0) {
660 GlobalConfig.GraphicsFor |= GRAPHICS_FOR_OSX;
661 } else if (StriCmp(TokenList[i], L"linux") == 0) {
662 GlobalConfig.GraphicsFor |= GRAPHICS_FOR_LINUX;
663 } else if (StriCmp(TokenList[i], L"elilo") == 0) {
664 GlobalConfig.GraphicsFor |= GRAPHICS_FOR_ELILO;
665 } else if (StriCmp(TokenList[i], L"grub") == 0) {
666 GlobalConfig.GraphicsFor |= GRAPHICS_FOR_GRUB;
667 } else if (StriCmp(TokenList[i], L"windows") == 0) {
668 GlobalConfig.GraphicsFor |= GRAPHICS_FOR_WINDOWS;
669 }
670 } // for (graphics_on tokens)
671
672 } else if ((StriCmp(TokenList[0], L"font") == 0) && (TokenCount == 2)) {
673 egLoadFont(TokenList[1]);
674
675 } else if (StriCmp(TokenList[0], L"scan_all_linux_kernels") == 0) {
676 GlobalConfig.ScanAllLinux = HandleBoolean(TokenList, TokenCount);
677
678 } else if (StriCmp(TokenList[0], L"max_tags") == 0) {
679 HandleInt(TokenList, TokenCount, &(GlobalConfig.MaxTags));
680
681 } else if (StriCmp(TokenList[0], L"enable_and_lock_vmx") == 0) {
682 GlobalConfig.EnableAndLockVMX = HandleBoolean(TokenList, TokenCount);
683
684 } else if ((StriCmp(TokenList[0], L"include") == 0) && (TokenCount == 2) &&
685 (StriCmp(FileName, GlobalConfig.ConfigFilename) == 0)) {
686 if (StriCmp(TokenList[1], FileName) != 0) {
687 ReadConfig(TokenList[1]);
688 }
689
690 }
691
692 FreeTokenLine(&TokenList, &TokenCount);
693 }
694 if ((GlobalConfig.DontScanFiles) && (GlobalConfig.WindowsRecoveryFiles))
695 MergeStrings(&(GlobalConfig.DontScanFiles), GlobalConfig.WindowsRecoveryFiles, L',');
696 MyFreePool(File.Buffer);
697
698 if (!FileExists(SelfDir, L"icons") && !FileExists(SelfDir, GlobalConfig.IconsDir)) {
699 Print(L"Icons directory doesn't exist; setting textonly = TRUE!\n");
700 GlobalConfig.TextOnly = TRUE;
701 }
702 } /* VOID ReadConfig() */
703
704 // Finds a volume with the specified Identifier (a filesystem label, a
705 // partition name, a partition GUID, or a number followed by a colon). If
706 // found, sets *Volume to point to that volume. If not, leaves it unchanged.
707 // Returns TRUE if a match was found, FALSE if not.
708 static BOOLEAN FindVolume(REFIT_VOLUME **Volume, CHAR16 *Identifier) {
709 UINTN i = 0, CountedVolumes = 0, Length;
710 INTN Number = -1;
711 BOOLEAN Found = FALSE, IdIsGuid = FALSE;
712 EFI_GUID VolGuid, NullGuid = NULL_GUID_VALUE;
713
714 VolGuid = StringAsGuid(Identifier);
715 Length = StrLen(Identifier);
716 if ((Length >= 2) && (Identifier[Length - 1] == L':') &&
717 (Identifier[0] >= L'0') && (Identifier[0] <= L'9')) {
718 Number = (INTN) Atoi(Identifier);
719 } else if (IsGuid(Identifier)) {
720 IdIsGuid = TRUE;
721 }
722 while ((i < VolumesCount) && (!Found)) {
723 if (Number >= 0) { // User specified a volume by number
724 if (Volumes[i]->IsReadable) {
725 if (CountedVolumes == Number) {
726 *Volume = Volumes[i];
727 Found = TRUE;
728 }
729 CountedVolumes++;
730 } // if
731 } else { // User specified a volume by label or GUID
732 if ((StriCmp(Identifier, Volumes[i]->VolName) == 0) ||
733 (StriCmp(Identifier, Volumes[i]->PartName) == 0)) {
734 *Volume = Volumes[i];
735 Found = TRUE;
736 } // if
737 if (IdIsGuid && !Found) {
738 if (GuidsAreEqual(&VolGuid, &(Volumes[i]->PartGuid)) && !GuidsAreEqual(&NullGuid, &(Volumes[i]->PartGuid))) {
739 *Volume = Volumes[i];
740 Found = TRUE;
741 } // if
742 } // if
743 } // if/else
744 i++;
745 } // while()
746 return (Found);
747 } // static VOID FindVolume()
748
749 static VOID AddSubmenu(LOADER_ENTRY *Entry, REFIT_FILE *File, REFIT_VOLUME *Volume, CHAR16 *Title) {
750 REFIT_MENU_SCREEN *SubScreen;
751 LOADER_ENTRY *SubEntry;
752 UINTN TokenCount;
753 CHAR16 **TokenList;
754
755 SubScreen = InitializeSubScreen(Entry);
756
757 // Set defaults for the new entry; will be modified based on lines read from the config. file....
758 SubEntry = InitializeLoaderEntry(Entry);
759
760 if ((SubEntry == NULL) || (SubScreen == NULL))
761 return;
762 SubEntry->me.Title = StrDuplicate(Title);
763
764 while (((TokenCount = ReadTokenLine(File, &TokenList)) > 0) && (StriCmp(TokenList[0], L"}") != 0)) {
765
766 if ((StriCmp(TokenList[0], L"loader") == 0) && (TokenCount > 1)) { // set the boot loader filename
767 MyFreePool(SubEntry->LoaderPath);
768 SubEntry->LoaderPath = StrDuplicate(TokenList[1]);
769 SubEntry->DevicePath = FileDevicePath(Volume->DeviceHandle, SubEntry->LoaderPath);
770
771 } else if ((StriCmp(TokenList[0], L"volume") == 0) && (TokenCount > 1)) {
772 if (FindVolume(&Volume, TokenList[1])) {
773 if ((Volume != NULL) && (Volume->IsReadable) && (Volume->RootDir)) {
774 MyFreePool(SubEntry->me.Title);
775 SubEntry->me.Title = AllocateZeroPool(256 * sizeof(CHAR16));
776 SPrint(SubEntry->me.Title, 255, L"Boot %s from %s", (Title != NULL) ? Title : L"Unknown", Volume->VolName);
777 SubEntry->me.BadgeImage = Volume->VolBadgeImage;
778 SubEntry->VolName = Volume->VolName;
779 } // if volume is readable
780 } // if match found
781
782 } else if (StriCmp(TokenList[0], L"initrd") == 0) {
783 MyFreePool(SubEntry->InitrdPath);
784 SubEntry->InitrdPath = NULL;
785 if (TokenCount > 1) {
786 SubEntry->InitrdPath = StrDuplicate(TokenList[1]);
787 }
788
789 } else if (StriCmp(TokenList[0], L"options") == 0) {
790 MyFreePool(SubEntry->LoadOptions);
791 SubEntry->LoadOptions = NULL;
792 if (TokenCount > 1) {
793 SubEntry->LoadOptions = StrDuplicate(TokenList[1]);
794 } // if/else
795
796 } else if ((StriCmp(TokenList[0], L"add_options") == 0) && (TokenCount > 1)) {
797 MergeStrings(&SubEntry->LoadOptions, TokenList[1], L' ');
798
799 } else if ((StriCmp(TokenList[0], L"graphics") == 0) && (TokenCount > 1)) {
800 SubEntry->UseGraphicsMode = (StriCmp(TokenList[1], L"on") == 0);
801
802 } else if (StriCmp(TokenList[0], L"disabled") == 0) {
803 SubEntry->Enabled = FALSE;
804 } // ief/elseif
805
806 FreeTokenLine(&TokenList, &TokenCount);
807 } // while()
808
809 if (SubEntry->InitrdPath != NULL) {
810 MergeStrings(&SubEntry->LoadOptions, L"initrd=", L' ');
811 MergeStrings(&SubEntry->LoadOptions, SubEntry->InitrdPath, 0);
812 MyFreePool(SubEntry->InitrdPath);
813 SubEntry->InitrdPath = NULL;
814 } // if
815 if (SubEntry->Enabled == TRUE) {
816 AddMenuEntry(SubScreen, (REFIT_MENU_ENTRY *)SubEntry);
817 }
818 Entry->me.SubScreen = SubScreen;
819 } // VOID AddSubmenu()
820
821 // Adds the options from a SINGLE refind.conf stanza to a new loader entry and returns
822 // that entry. The calling function is then responsible for adding the entry to the
823 // list of entries.
824 static LOADER_ENTRY * AddStanzaEntries(REFIT_FILE *File, REFIT_VOLUME *Volume, CHAR16 *Title) {
825 CHAR16 **TokenList;
826 UINTN TokenCount;
827 LOADER_ENTRY *Entry;
828 BOOLEAN DefaultsSet = FALSE, AddedSubmenu = FALSE;
829 REFIT_VOLUME *CurrentVolume = Volume;
830
831 // prepare the menu entry
832 Entry = InitializeLoaderEntry(NULL);
833 if (Entry == NULL)
834 return NULL;
835
836 Entry->Title = StrDuplicate(Title);
837 Entry->me.Title = AllocateZeroPool(256 * sizeof(CHAR16));
838 SPrint(Entry->me.Title, 255, L"Boot %s from %s", (Title != NULL) ? Title : L"Unknown", CurrentVolume->VolName);
839 Entry->me.Row = 0;
840 Entry->me.BadgeImage = CurrentVolume->VolBadgeImage;
841 Entry->VolName = CurrentVolume->VolName;
842
843 // Parse the config file to add options for a single stanza, terminating when the token
844 // is "}" or when the end of file is reached.
845 while (((TokenCount = ReadTokenLine(File, &TokenList)) > 0) && (StriCmp(TokenList[0], L"}") != 0)) {
846 if ((StriCmp(TokenList[0], L"loader") == 0) && (TokenCount > 1)) { // set the boot loader filename
847 Entry->LoaderPath = StrDuplicate(TokenList[1]);
848 Entry->DevicePath = FileDevicePath(CurrentVolume->DeviceHandle, Entry->LoaderPath);
849 SetLoaderDefaults(Entry, TokenList[1], CurrentVolume);
850 MyFreePool(Entry->LoadOptions);
851 Entry->LoadOptions = NULL; // Discard default options, if any
852 DefaultsSet = TRUE;
853
854 } else if ((StriCmp(TokenList[0], L"volume") == 0) && (TokenCount > 1)) {
855 if (FindVolume(&CurrentVolume, TokenList[1])) {
856 if ((CurrentVolume != NULL) && (CurrentVolume->IsReadable) && (CurrentVolume->RootDir)) {
857 MyFreePool(Entry->me.Title);
858 Entry->me.Title = AllocateZeroPool(256 * sizeof(CHAR16));
859 SPrint(Entry->me.Title, 255, L"Boot %s from %s", (Title != NULL) ? Title : L"Unknown", CurrentVolume->VolName);
860 Entry->me.BadgeImage = CurrentVolume->VolBadgeImage;
861 Entry->VolName = CurrentVolume->VolName;
862 } // if volume is readable
863 } // if match found
864
865 } else if ((StriCmp(TokenList[0], L"icon") == 0) && (TokenCount > 1)) {
866 MyFreePool(Entry->me.Image);
867 Entry->me.Image = egLoadIcon(CurrentVolume->RootDir, TokenList[1], GlobalConfig.IconSizes[ICON_SIZE_BIG]);
868 if (Entry->me.Image == NULL) {
869 Entry->me.Image = DummyImage(GlobalConfig.IconSizes[ICON_SIZE_BIG]);
870 }
871
872 } else if ((StriCmp(TokenList[0], L"initrd") == 0) && (TokenCount > 1)) {
873 MyFreePool(Entry->InitrdPath);
874 Entry->InitrdPath = StrDuplicate(TokenList[1]);
875
876 } else if ((StriCmp(TokenList[0], L"options") == 0) && (TokenCount > 1)) {
877 MyFreePool(Entry->LoadOptions);
878 Entry->LoadOptions = StrDuplicate(TokenList[1]);
879
880 } else if ((StriCmp(TokenList[0], L"ostype") == 0) && (TokenCount > 1)) {
881 if (TokenCount > 1) {
882 Entry->OSType = TokenList[1][0];
883 }
884
885 } else if ((StriCmp(TokenList[0], L"graphics") == 0) && (TokenCount > 1)) {
886 Entry->UseGraphicsMode = (StriCmp(TokenList[1], L"on") == 0);
887
888 } else if (StriCmp(TokenList[0], L"disabled") == 0) {
889 Entry->Enabled = FALSE;
890
891 } else if ((StriCmp(TokenList[0], L"submenuentry") == 0) && (TokenCount > 1)) {
892 AddSubmenu(Entry, File, CurrentVolume, TokenList[1]);
893 AddedSubmenu = TRUE;
894
895 } // set options to pass to the loader program
896 FreeTokenLine(&TokenList, &TokenCount);
897 } // while()
898
899 if (AddedSubmenu)
900 AddMenuEntry(Entry->me.SubScreen, &MenuEntryReturn);
901
902 if (Entry->InitrdPath) {
903 MergeStrings(&Entry->LoadOptions, L"initrd=", L' ');
904 MergeStrings(&Entry->LoadOptions, Entry->InitrdPath, 0);
905 MyFreePool(Entry->InitrdPath);
906 Entry->InitrdPath = NULL;
907 } // if
908
909 if (!DefaultsSet)
910 SetLoaderDefaults(Entry, L"\\EFI\\BOOT\\nemo.efi", CurrentVolume); // user included no "loader" line; use bogus one
911
912 return(Entry);
913 } // static VOID AddStanzaEntries()
914
915 // Read the user-configured menu entries from refind.conf and add or delete
916 // entries based on the contents of that file....
917 VOID ScanUserConfigured(CHAR16 *FileName)
918 {
919 EFI_STATUS Status;
920 REFIT_FILE File;
921 REFIT_VOLUME *Volume;
922 CHAR16 **TokenList;
923 CHAR16 *Title = NULL;
924 UINTN TokenCount, size;
925 LOADER_ENTRY *Entry;
926
927 if (FileExists(SelfDir, FileName)) {
928 Status = ReadFile(SelfDir, FileName, &File, &size);
929 if (EFI_ERROR(Status))
930 return;
931
932 Volume = SelfVolume;
933
934 while ((TokenCount = ReadTokenLine(&File, &TokenList)) > 0) {
935 if ((StriCmp(TokenList[0], L"menuentry") == 0) && (TokenCount > 1)) {
936 Title = StrDuplicate(TokenList[1]);
937 Entry = AddStanzaEntries(&File, Volume, TokenList[1]);
938 if (Entry->Enabled) {
939 if (Entry->me.SubScreen == NULL)
940 GenerateSubScreen(Entry, Volume);
941 AddPreparedLoaderEntry(Entry);
942 } else {
943 MyFreePool(Entry);
944 } // if/else
945 MyFreePool(Title);
946
947 } else if ((StriCmp(TokenList[0], L"include") == 0) && (TokenCount == 2) &&
948 (StriCmp(FileName, GlobalConfig.ConfigFilename) == 0)) {
949 if (StriCmp(TokenList[1], FileName) != 0) {
950 ScanUserConfigured(TokenList[1]);
951 }
952
953 } // if/else if...
954 FreeTokenLine(&TokenList, &TokenCount);
955 } // while()
956 } // if()
957 } // VOID ScanUserConfigured()
958
959 // Create an options file based on /etc/fstab. The resulting file has two options
960 // lines, one of which boots the system with "ro root={rootfs}" and the other of
961 // which boots the system with "ro root={rootfs} single", where "{rootfs}" is the
962 // filesystem identifier associated with the "/" line in /etc/fstab.
963 static REFIT_FILE * GenerateOptionsFromEtcFstab(REFIT_VOLUME *Volume) {
964 UINTN TokenCount, i;
965 REFIT_FILE *Options = NULL, *Fstab = NULL;
966 EFI_STATUS Status;
967 CHAR16 **TokenList, *Line, Root[100];
968
969 if (FileExists(Volume->RootDir, L"\\etc\\fstab")) {
970 Options = AllocateZeroPool(sizeof(REFIT_FILE));
971 Fstab = AllocateZeroPool(sizeof(REFIT_FILE));
972 Status = ReadFile(Volume->RootDir, L"\\etc\\fstab", Fstab, &i);
973 if (CheckError(Status, L"while reading /etc/fstab")) {
974 if (Options != NULL)
975 FreePool(Options);
976 if (Fstab != NULL)
977 FreePool(Fstab);
978 Options = NULL;
979 Fstab = NULL;
980 } else { // File read; locate root fs and create entries
981 Options->Encoding = ENCODING_UTF16_LE;
982 while ((TokenCount = ReadTokenLine(Fstab, &TokenList)) > 0) {
983 if (TokenCount > 2) {
984 Root[0] = '\0';
985 if (StriCmp(TokenList[1], L"\\") == 0) {
986 SPrint(Root, 99, L"%s", TokenList[0]);
987 } else if (StriCmp(TokenList[2], L"\\") == 0) {
988 SPrint(Root, 99, L"%s=%s", TokenList[0], TokenList[1]);
989 } // if/elseif/elseif
990 if (Root[0] != L'\0') {
991 for (i = 0; i < StrLen(Root); i++)
992 if (Root[i] == '\\')
993 Root[i] = '/';
994 Line = PoolPrint(L"\"Boot with normal options\" \"ro root=%s\"\n", Root);
995 MergeStrings((CHAR16 **) &(Options->Buffer), Line, 0);
996 MyFreePool(Line);
997 Line = PoolPrint(L"\"Boot into single-user mode\" \"ro root=%s single\"\n", Root);
998 MergeStrings((CHAR16**) &(Options->Buffer), Line, 0);
999 Options->BufferSize = StrLen((CHAR16*) Options->Buffer) * sizeof(CHAR16);
1000 } // if
1001 } // if
1002 FreeTokenLine(&TokenList, &TokenCount);
1003 } // while
1004
1005 Options->Current8Ptr = (CHAR8 *)Options->Buffer;
1006 Options->End8Ptr = Options->Current8Ptr + Options->BufferSize;
1007 Options->Current16Ptr = (CHAR16 *)Options->Buffer;
1008 Options->End16Ptr = Options->Current16Ptr + (Options->BufferSize >> 1);
1009
1010 MyFreePool(Fstab->Buffer);
1011 MyFreePool(Fstab);
1012 } // if/else file read error
1013 } // if /etc/fstab exists
1014 return Options;
1015 } // GenerateOptionsFromEtcFstab()
1016
1017
1018 // Read a Linux kernel options file for a Linux boot loader into memory. The LoaderPath
1019 // and Volume variables identify the location of the options file, but not its name --
1020 // you pass this function the filename of the Linux kernel, initial RAM disk, or other
1021 // file in the target directory, and this function finds the file with a name in the
1022 // comma-delimited list of names specified by LINUX_OPTIONS_FILENAMES within that
1023 // directory and loads it. This function tries multiple files because I originally
1024 // used the filename linux.conf, but close on the heels of that decision, the Linux
1025 // kernel developers decided to use that name for a similar purpose, but with a
1026 // different file format. Thus, I'm migrating rEFInd to use the name refind_linux.conf,
1027 // but I want a migration period in which both names are used.
1028 // If a rEFInd options file can't be found, try to generate minimal options from
1029 // /etc/fstab on the same volume as the kernel. This typically works only if the
1030 // kernel is being read from the Linux root filesystem.
1031 //
1032 // The return value is a pointer to the REFIT_FILE handle for the file, or NULL if
1033 // it wasn't found.
1034 REFIT_FILE * ReadLinuxOptionsFile(IN CHAR16 *LoaderPath, IN REFIT_VOLUME *Volume) {
1035 CHAR16 *OptionsFilename, *FullFilename;
1036 BOOLEAN GoOn = TRUE, FileFound = FALSE;
1037 UINTN i = 0, size;
1038 REFIT_FILE *File = NULL;
1039 EFI_STATUS Status;
1040
1041 do {
1042 OptionsFilename = FindCommaDelimited(LINUX_OPTIONS_FILENAMES, i++);
1043 FullFilename = FindPath(LoaderPath);
1044 if ((OptionsFilename != NULL) && (FullFilename != NULL)) {
1045 MergeStrings(&FullFilename, OptionsFilename, '\\');
1046 if (FileExists(Volume->RootDir, FullFilename)) {
1047 File = AllocateZeroPool(sizeof(REFIT_FILE));
1048 Status = ReadFile(Volume->RootDir, FullFilename, File, &size);
1049 if (CheckError(Status, L"while loading the Linux options file")) {
1050 if (File != NULL)
1051 FreePool(File);
1052 File = NULL;
1053 } else {
1054 GoOn = FALSE;
1055 FileFound = TRUE;
1056 } // if/else error
1057 } // if file exists
1058 } else { // a filename string is NULL
1059 GoOn = FALSE;
1060 } // if/else
1061 if (!FileFound)
1062 File = GenerateOptionsFromEtcFstab(Volume);
1063 MyFreePool(OptionsFilename);
1064 MyFreePool(FullFilename);
1065 OptionsFilename = FullFilename = NULL;
1066 } while (GoOn);
1067 return (File);
1068 } // static REFIT_FILE * ReadLinuxOptionsFile()
1069
1070 // Retrieve a single line of options from a Linux kernel options file
1071 CHAR16 * GetFirstOptionsFromFile(IN CHAR16 *LoaderPath, IN REFIT_VOLUME *Volume) {
1072 UINTN TokenCount;
1073 CHAR16 *Options = NULL;
1074 CHAR16 **TokenList;
1075 REFIT_FILE *File;
1076
1077 File = ReadLinuxOptionsFile(LoaderPath, Volume);
1078 if (File != NULL) {
1079 TokenCount = ReadTokenLine(File, &TokenList);
1080 if (TokenCount > 1)
1081 Options = StrDuplicate(TokenList[1]);
1082 FreeTokenLine(&TokenList, &TokenCount);
1083 FreePool(File);
1084 } // if
1085 return Options;
1086 } // static CHAR16 * GetOptionsFile()
1087