1 /*
2 Implementation of GPTData class derivative with popt-based command
3 line processing
4 Copyright (C) 2010-2014 Roderick W. Smith
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21 #include <string.h>
22 #include <string>
23 #include <iostream>
24 #include <sstream>
25 #include <errno.h>
26 #include "gptcl.h"
27
GPTDataCL(void)28 GPTDataCL::GPTDataCL(void) {
29 attributeOperation = backupFile = partName = hybrids = newPartInfo = NULL;
30 mbrParts = twoParts = outDevice = typeCode = partGUID = diskGUID = NULL;
31 alignment = DEFAULT_ALIGNMENT;
32 deletePartNum = infoPartNum = largestPartNum = bsdPartNum = 0;
33 tableSize = GPT_SIZE;
34 } // GPTDataCL constructor
35
GPTDataCL(string filename)36 GPTDataCL::GPTDataCL(string filename) {
37 } // GPTDataCL constructor with filename
38
~GPTDataCL(void)39 GPTDataCL::~GPTDataCL(void) {
40 } // GPTDataCL destructor
41
LoadBackupFile(string backupFile,int & saveData,int & neverSaveData)42 void GPTDataCL::LoadBackupFile(string backupFile, int &saveData, int &neverSaveData) {
43 if (LoadGPTBackup(backupFile) == 1) {
44 JustLooking(0);
45 saveData = 1;
46 } else {
47 saveData = 0;
48 neverSaveData = 1;
49 cerr << "Error loading backup file!\n";
50 } // else
51 } // GPTDataCL::LoadBackupFile()
52
53 // Perform the actions specified on the command line. This is necessarily one
54 // monster of a function!
55 // Returns values:
56 // 0 = success
57 // 1 = too few arguments
58 // 2 = error when reading partition table
59 // 3 = non-GPT disk and no -g option
60 // 4 = unable to save changes
61 // 8 = disk replication operation (-R) failed
DoOptions(int argc,char * argv[])62 int GPTDataCL::DoOptions(int argc, char* argv[]) {
63 GPTData secondDevice;
64 int opt, numOptions = 0, saveData = 0, neverSaveData = 0;
65 int partNum = 0, newPartNum = -1, saveNonGPT = 1, retval = 0, pretend = 0;
66 uint64_t low, high, startSector, endSector, sSize;
67 uint64_t temp; // temporary variable; free to use in any case
68 char *device;
69 string cmd, typeGUID, name;
70 PartType typeHelper;
71
72 struct poptOption theOptions[] =
73 {
74 {"attributes", 'A', POPT_ARG_STRING, &attributeOperation, 'A', "operate on partition attributes", "list|[partnum:show|or|nand|xor|=|set|clear|toggle|get[:bitnum|hexbitmask]]"},
75 {"set-alignment", 'a', POPT_ARG_INT, &alignment, 'a', "set sector alignment", "value"},
76 {"backup", 'b', POPT_ARG_STRING, &backupFile, 'b', "backup GPT to file", "file"},
77 {"change-name", 'c', POPT_ARG_STRING, &partName, 'c', "change partition's name", "partnum:name"},
78 {"recompute-chs", 'C', POPT_ARG_NONE, NULL, 'C', "recompute CHS values in protective/hybrid MBR", ""},
79 {"delete", 'd', POPT_ARG_INT, &deletePartNum, 'd', "delete a partition", "partnum"},
80 {"display-alignment", 'D', POPT_ARG_NONE, NULL, 'D', "show number of sectors per allocation block", ""},
81 {"move-second-header", 'e', POPT_ARG_NONE, NULL, 'e', "move second header to end of disk", ""},
82 {"end-of-largest", 'E', POPT_ARG_NONE, NULL, 'E', "show end of largest free block", ""},
83 {"first-in-largest", 'f', POPT_ARG_NONE, NULL, 'f', "show start of the largest free block", ""},
84 {"first-aligned-in-largest", 'F', POPT_ARG_NONE, NULL, 'F', "show start of the largest free block, aligned", ""},
85 {"mbrtogpt", 'g', POPT_ARG_NONE, NULL, 'g', "convert MBR to GPT", ""},
86 {"randomize-guids", 'G', POPT_ARG_NONE, NULL, 'G', "randomize disk and partition GUIDs", ""},
87 {"hybrid", 'h', POPT_ARG_STRING, &hybrids, 'h', "create hybrid MBR", "partnum[:partnum...]"},
88 {"info", 'i', POPT_ARG_INT, &infoPartNum, 'i', "show detailed information on partition", "partnum"},
89 {"load-backup", 'l', POPT_ARG_STRING, &backupFile, 'l', "load GPT backup from file", "file"},
90 {"list-types", 'L', POPT_ARG_NONE, NULL, 'L', "list known partition types", ""},
91 {"gpttombr", 'm', POPT_ARG_STRING, &mbrParts, 'm', "convert GPT to MBR", "partnum[:partnum...]"},
92 {"new", 'n', POPT_ARG_STRING, &newPartInfo, 'n', "create new partition", "partnum:start:end"},
93 {"largest-new", 'N', POPT_ARG_INT, &largestPartNum, 'N', "create largest possible new partition", "partnum"},
94 {"clear", 'o', POPT_ARG_NONE, NULL, 'o', "clear partition table", ""},
95 {"print", 'p', POPT_ARG_NONE, NULL, 'p', "print partition table", ""},
96 {"pretend", 'P', POPT_ARG_NONE, NULL, 'P', "make changes in memory, but don't write them", ""},
97 {"transpose", 'r', POPT_ARG_STRING, &twoParts, 'r', "transpose two partitions", "partnum:partnum"},
98 {"replicate", 'R', POPT_ARG_STRING, &outDevice, 'R', "replicate partition table", "device_filename"},
99 {"sort", 's', POPT_ARG_NONE, NULL, 's', "sort partition table entries", ""},
100 {"resize-table", 'S', POPT_ARG_INT, &tableSize, 'S', "resize partition table", "numparts"},
101 {"typecode", 't', POPT_ARG_STRING, &typeCode, 't', "change partition type code", "partnum:{hexcode|GUID}"},
102 {"transform-bsd", 'T', POPT_ARG_INT, &bsdPartNum, 'T', "transform BSD disklabel partition to GPT", "partnum"},
103 {"partition-guid", 'u', POPT_ARG_STRING, &partGUID, 'u', "set partition GUID", "partnum:guid"},
104 {"disk-guid", 'U', POPT_ARG_STRING, &diskGUID, 'U', "set disk GUID", "guid"},
105 {"verify", 'v', POPT_ARG_NONE, NULL, 'v', "check partition table integrity", ""},
106 {"version", 'V', POPT_ARG_NONE, NULL, 'V', "display version information", ""},
107 {"zap", 'z', POPT_ARG_NONE, NULL, 'z', "zap (destroy) GPT (but not MBR) data structures", ""},
108 {"zap-all", 'Z', POPT_ARG_NONE, NULL, 'Z', "zap (destroy) GPT and MBR data structures", ""},
109 POPT_AUTOHELP { NULL, 0, 0, NULL, 0 }
110 };
111
112 // Create popt context...
113 poptCon = poptGetContext(NULL, argc, (const char**) argv, theOptions, 0);
114
115 poptSetOtherOptionHelp(poptCon, " [OPTION...] <device>");
116
117 if (argc < 2) {
118 poptPrintUsage(poptCon, stderr, 0);
119 return 1;
120 }
121
122 // Do one loop through the options to find the device filename and deal
123 // with options that don't require a device filename, to flag destructive
124 // (o, z, or Z) options, and to flag presence of a --pretend/-P option
125 while ((opt = poptGetNextOpt(poptCon)) > 0) {
126 switch (opt) {
127 case 'A':
128 cmd = GetString(attributeOperation, 1);
129 if (cmd == "list")
130 Attributes::ListAttributes();
131 break;
132 case 'L':
133 typeHelper.ShowAllTypes(0);
134 break;
135 case 'P':
136 pretend = 1;
137 break;
138 case 'V':
139 cout << "GPT fdisk (sgdisk) version " << GPTFDISK_VERSION << "\n\n";
140 break;
141 default:
142 break;
143 } // switch
144 numOptions++;
145 } // while
146
147 // Assume first non-option argument is the device filename....
148 device = (char*) poptGetArg(poptCon);
149 poptResetContext(poptCon);
150
151 if (device != NULL) {
152 JustLooking(); // reset as necessary
153 BeQuiet(); // Tell called functions to be less verbose & interactive
154 if (LoadPartitions((string) device)) {
155 if ((WhichWasUsed() == use_mbr) || (WhichWasUsed() == use_bsd))
156 saveNonGPT = 0; // flag so we don't overwrite unless directed to do so
157 sSize = GetBlockSize();
158 while ((opt = poptGetNextOpt(poptCon)) > 0) {
159 switch (opt) {
160 case 'A': {
161 if (cmd != "list") {
162 partNum = (int) GetInt(attributeOperation, 1) - 1;
163 if (partNum < 0)
164 partNum = newPartNum;
165 if ((partNum >= 0) && (partNum < (int) GetNumParts())) {
166 switch (ManageAttributes(partNum, GetString(attributeOperation, 2),
167 GetString(attributeOperation, 3))) {
168 case -1:
169 saveData = 0;
170 neverSaveData = 1;
171 break;
172 case 1:
173 JustLooking(0);
174 saveData = 1;
175 break;
176 default:
177 break;
178 } // switch
179 } else {
180 cerr << "Error: Invalid partition number " << partNum + 1 << "\n";
181 saveData = 0;
182 neverSaveData = 1;
183 } // if/else reasonable partition #
184 } // if (cmd != "list")
185 break;
186 } // case 'A':
187 case 'a':
188 SetAlignment(alignment);
189 break;
190 case 'b':
191 SaveGPTBackup(backupFile);
192 free(backupFile);
193 break;
194 case 'c':
195 cout << "Setting name!\n";
196 JustLooking(0);
197 partNum = (int) GetInt(partName, 1) - 1;
198 if (partNum < 0)
199 partNum = newPartNum;
200 cout << "partNum is " << partNum << "\n";
201 if ((partNum >= 0) && (partNum < (int) GetNumParts())) {
202 cout << "REALLY setting name!\n";
203 name = GetString(partName, 2);
204 if (SetName(partNum, (UnicodeString) name.c_str())) {
205 saveData = 1;
206 } else {
207 cerr << "Unable to set partition " << partNum + 1
208 << "'s name to '" << GetString(partName, 2) << "'!\n";
209 neverSaveData = 1;
210 } // if/else
211 free(partName);
212 }
213 break;
214 case 'C':
215 JustLooking(0);
216 RecomputeCHS();
217 saveData = 1;
218 break;
219 case 'd':
220 JustLooking(0);
221 if (DeletePartition(deletePartNum - 1) == 0) {
222 cerr << "Error " << errno << " deleting partition!\n";
223 neverSaveData = 1;
224 } else saveData = 1;
225 break;
226 case 'D':
227 cout << GetAlignment() << "\n";
228 break;
229 case 'e':
230 JustLooking(0);
231 MoveSecondHeaderToEnd();
232 saveData = 1;
233 break;
234 case 'E':
235 cout << FindLastInFree(FindFirstInLargest()) << "\n";
236 break;
237 case 'f':
238 cout << FindFirstInLargest() << "\n";
239 break;
240 case 'F':
241 temp = FindFirstInLargest();
242 Align(&temp);
243 cout << temp << "\n";
244 break;
245 case 'g':
246 JustLooking(0);
247 saveData = 1;
248 saveNonGPT = 1;
249 break;
250 case 'G':
251 JustLooking(0);
252 saveData = 1;
253 RandomizeGUIDs();
254 break;
255 case 'h':
256 JustLooking(0);
257 if (BuildMBR(hybrids, 1) == 1)
258 saveData = 1;
259 break;
260 case 'i':
261 ShowPartDetails(infoPartNum - 1);
262 break;
263 case 'l':
264 LoadBackupFile(backupFile, saveData, neverSaveData);
265 free(backupFile);
266 break;
267 case 'L':
268 break;
269 case 'm':
270 JustLooking(0);
271 if (BuildMBR(mbrParts, 0) == 1) {
272 if (!pretend) {
273 if (SaveMBR()) {
274 DestroyGPT();
275 } else
276 cerr << "Problem saving MBR!\n";
277 } // if
278 saveNonGPT = 0;
279 pretend = 1; // Not really, but works around problem if -g is used with this...
280 saveData = 0;
281 } // if
282 break;
283 case 'n':
284 JustLooking(0);
285 newPartNum = (int) GetInt(newPartInfo, 1) - 1;
286 if (newPartNum < 0)
287 newPartNum = FindFirstFreePart();
288 low = FindFirstInLargest();
289 Align(&low);
290 high = FindLastInFree(low);
291 startSector = IeeeToInt(GetString(newPartInfo, 2), sSize, low, high, low);
292 endSector = IeeeToInt(GetString(newPartInfo, 3), sSize, startSector, high, high);
293 if (CreatePartition(newPartNum, startSector, endSector)) {
294 saveData = 1;
295 } else {
296 cerr << "Could not create partition " << newPartNum + 1 << " from "
297 << startSector << " to " << endSector << "\n";
298 neverSaveData = 1;
299 } // if/else
300 free(newPartInfo);
301 break;
302 case 'N':
303 JustLooking(0);
304 startSector = FindFirstInLargest();
305 Align(&startSector);
306 endSector = FindLastInFree(startSector);
307 if (largestPartNum < 0)
308 largestPartNum = FindFirstFreePart();
309 if (CreatePartition(largestPartNum - 1, startSector, endSector)) {
310 saveData = 1;
311 } else {
312 cerr << "Could not create partition " << largestPartNum << " from "
313 << startSector << " to " << endSector << "\n";
314 neverSaveData = 1;
315 } // if/else
316 break;
317 case 'o':
318 JustLooking(0);
319 ClearGPTData();
320 saveData = 1;
321 break;
322 case 'p':
323 DisplayGPTData();
324 break;
325 case 'P':
326 pretend = 1;
327 break;
328 case 'r':
329 JustLooking(0);
330 uint64_t p1, p2;
331 p1 = GetInt(twoParts, 1) - 1;
332 p2 = GetInt(twoParts, 2) - 1;
333 if (SwapPartitions((uint32_t) p1, (uint32_t) p2) == 0) {
334 neverSaveData = 1;
335 cerr << "Cannot swap partitions " << p1 + 1 << " and " << p2 + 1 << "\n";
336 } else saveData = 1;
337 break;
338 case 'R':
339 secondDevice = *this;
340 secondDevice.SetDisk(outDevice);
341 secondDevice.JustLooking(0);
342 if (!secondDevice.SaveGPTData(1))
343 retval = 8;
344 break;
345 case 's':
346 JustLooking(0);
347 SortGPT();
348 saveData = 1;
349 break;
350 case 'S':
351 JustLooking(0);
352 if (SetGPTSize(tableSize) == 0)
353 neverSaveData = 1;
354 else
355 saveData = 1;
356 break;
357 case 't':
358 JustLooking(0);
359 partNum = (int) GetInt(typeCode, 1) - 1;
360 if (partNum < 0)
361 partNum = newPartNum;
362 if ((partNum >= 0) && (partNum < (int) GetNumParts())) {
363 typeHelper = GetString(typeCode, 2);
364 if ((typeHelper != (GUIDData) "00000000-0000-0000-0000-000000000000") &&
365 (ChangePartType(partNum, typeHelper))) {
366 saveData = 1;
367 } else {
368 cerr << "Could not change partition " << partNum + 1
369 << "'s type code to " << GetString(typeCode, 2) << "!\n";
370 neverSaveData = 1;
371 } // if/else
372 free(typeCode);
373 }
374 break;
375 case 'T':
376 JustLooking(0);
377 XFormDisklabel(bsdPartNum - 1);
378 saveData = 1;
379 break;
380 case 'u':
381 JustLooking(0);
382 saveData = 1;
383 partNum = (int) GetInt(partGUID, 1) - 1;
384 if (partNum < 0)
385 partNum = newPartNum;
386 if ((partNum >= 0) && (partNum < (int) GetNumParts())) {
387 SetPartitionGUID(partNum, GetString(partGUID, 2).c_str());
388 }
389 break;
390 case 'U':
391 JustLooking(0);
392 saveData = 1;
393 SetDiskGUID(diskGUID);
394 break;
395 case 'v':
396 Verify();
397 break;
398 case 'z':
399 if (!pretend) {
400 DestroyGPT();
401 } // if
402 saveNonGPT = 0;
403 saveData = 0;
404 break;
405 case 'Z':
406 if (!pretend) {
407 DestroyGPT();
408 DestroyMBR();
409 } // if
410 saveNonGPT = 0;
411 saveData = 0;
412 break;
413 default:
414 cerr << "Unknown option (-" << opt << ")!\n";
415 break;
416 } // switch
417 } // while
418 } else { // if loaded OK
419 poptResetContext(poptCon);
420 // Do a few types of operations even if there are problems....
421 while ((opt = poptGetNextOpt(poptCon)) > 0) {
422 switch (opt) {
423 case 'l':
424 LoadBackupFile(backupFile, saveData, neverSaveData);
425 cout << "Information: Loading backup partition table; will override earlier problems!\n";
426 free(backupFile);
427 retval = 0;
428 break;
429 case 'o':
430 JustLooking(0);
431 ClearGPTData();
432 saveData = 1;
433 cout << "Information: Creating fresh partition table; will override earlier problems!\n";
434 retval = 0;
435 break;
436 case 'v':
437 cout << "Verification may miss some problems or report too many!\n";
438 Verify();
439 break;
440 case 'z':
441 if (!pretend) {
442 DestroyGPT();
443 } // if
444 saveNonGPT = 0;
445 saveData = 0;
446 break;
447 case 'Z':
448 if (!pretend) {
449 DestroyGPT();
450 DestroyMBR();
451 } // if
452 saveNonGPT = 0;
453 saveData = 0;
454 break;
455 } // switch
456 } // while
457 retval = 2;
458 } // if/else loaded OK
459 if ((saveData) && (!neverSaveData) && (saveNonGPT) && (!pretend)) {
460 SaveGPTData(1);
461 }
462 if (saveData && (!saveNonGPT)) {
463 cout << "Non-GPT disk; not saving changes. Use -g to override.\n";
464 retval = 3;
465 } // if
466 if (neverSaveData) {
467 cerr << "Error encountered; not saving changes.\n";
468 retval = 4;
469 } // if
470 } // if (device != NULL)
471 poptFreeContext(poptCon);
472 return retval;
473 } // GPTDataCL::DoOptions()
474
475 // Create a hybrid or regular MBR from GPT data structures
BuildMBR(char * argument,int isHybrid)476 int GPTDataCL::BuildMBR(char* argument, int isHybrid) {
477 int numParts, allOK = 1, i, origPartNum;
478 MBRPart newPart;
479 BasicMBRData newMBR;
480
481 if (argument != NULL) {
482 numParts = CountColons(argument) + 1;
483 if (numParts <= (4 - isHybrid)) {
484 newMBR.SetDisk(GetDisk());
485 for (i = 0; i < numParts; i++) {
486 origPartNum = GetInt(argument, i + 1) - 1;
487 if (IsUsedPartNum(origPartNum) && (partitions[origPartNum].IsSizedForMBR() == MBR_SIZED_GOOD)) {
488 newPart.SetInclusion(PRIMARY);
489 newPart.SetLocation(operator[](origPartNum).GetFirstLBA(),
490 operator[](origPartNum).GetLengthLBA());
491 newPart.SetStatus(0);
492 newPart.SetType((uint8_t)(operator[](origPartNum).GetHexType() / 0x0100));
493 newMBR.AddPart(i + isHybrid, newPart);
494 } else {
495 cerr << "Original partition " << origPartNum + 1 << " does not exist or is too big! Aborting operation!\n";
496 allOK = 0;
497 } // if/else
498 } // for
499 if (isHybrid) {
500 newPart.SetInclusion(PRIMARY);
501 newPart.SetLocation(1, newMBR.FindLastInFree(1));
502 newPart.SetStatus(0);
503 newPart.SetType(0xEE);
504 newMBR.AddPart(0, newPart);
505 } // if
506 if (allOK)
507 SetProtectiveMBR(newMBR);
508 } else allOK = 0;
509 } else allOK = 0;
510 if (!allOK)
511 cerr << "Problem creating MBR!\n";
512 return allOK;
513 } // GPTDataCL::BuildMBR()
514
515 // Returns the number of colons in argument string, ignoring the
516 // first character (thus, a leading colon is ignored, as GetString()
517 // does).
CountColons(char * argument)518 int CountColons(char* argument) {
519 int num = 0;
520
521 while ((argument[0] != '\0') && (argument = strchr(&argument[1], ':')))
522 num++;
523
524 return num;
525 } // GPTDataCL::CountColons()
526
527 // Extract integer data from argument string, which should be colon-delimited
GetInt(const string & argument,int itemNum)528 uint64_t GetInt(const string & argument, int itemNum) {
529 uint64_t retval;
530
531 istringstream inString(GetString(argument, itemNum));
532 inString >> retval;
533 return retval;
534 } // GPTDataCL::GetInt()
535
536 // Extract string data from argument string, which should be colon-delimited
537 // If string begins with a colon, that colon is skipped in the counting. If an
538 // invalid itemNum is specified, returns an empty string.
GetString(string argument,int itemNum)539 string GetString(string argument, int itemNum) {
540 size_t startPos = 0, endPos = 0;
541 string retVal = "";
542 int foundLast = 0;
543 int numFound = 0;
544
545 if (argument[0] == ':')
546 argument.erase(0, 1);
547 while ((numFound < itemNum) && (!foundLast)) {
548 endPos = argument.find(':', startPos);
549 numFound++;
550 if (endPos == string::npos) {
551 foundLast = 1;
552 endPos = argument.length();
553 } else if (numFound < itemNum) {
554 startPos = endPos + 1;
555 } // if/elseif
556 } // while
557 if ((numFound == itemNum) && (numFound > 0))
558 retVal = argument.substr(startPos, endPos - startPos);
559
560 return retVal;
561 } // GetString()
562