Early support for larger-than-512-byte sectors and even earlier support

for sgdisk program. (The latter is just proof-of-concept at this point;
it doesn't do anything useful.)

1 files changed, 464 insertions, 0 deletions

diff --git a/sgdisk.cc b/sgdisk.cc
new file mode 100644
index 0000000..9479afb
--- /dev/null
+++ b/sgdisk.cc
@@ -0,0 +1,464 @@
+// sgdisk.cc
+// Program modelled after Linux sfdisk, but it manipulates GPT partitions
+// rather than MBR partitions. This is effectively a new user interface
+// to my gdisk program.
+//
+// by Rod Smith, project began February 2009
+
+/* This program is copyright (c) 2009, 2010 by Roderick W. Smith. It is distributed
+  under the terms of the GNU GPL version 2, as detailed in the COPYING file. */
+
+//#include <iostream>
+#include <stdio.h>
+#include <string.h>
+#include <getopt.h>
+#include "mbr.h"
+#include "gpt.h"
+#include "support.h"
+
+#define MAX_OPTIONS 50
+
+// Function prototypes....
+/* void MainMenu(char* filename, struct GPTData* theGPT);
+void ShowCommands(void);
+void ExpertsMenu(char* filename, struct GPTData* theGPT);
+void ShowExpertCommands(void);
+void RecoveryMenu(char* filename, struct GPTData* theGPT);
+void ShowRecoveryCommands(void); */
+
+enum Commands { NONE, LIST, VERIFY };
+
+struct Options {
+   Commands theCommand;
+   char* theArgument;
+}; // struct Options
+
+int verbose_flag;
+
+static struct option long_options[] =
+{
+   {"verify",  no_argument, NULL, 'v'},
+   {"list",    no_argument, NULL, 'l'},
+   {0, 0, NULL, 0}
+};
+
+int ParseOptions(int argc, char* argv[], Options* theOptions, char** device);
+
+int main(int argc, char* argv[]) {
+   GPTData theGPT;
+   int doMore = 1, opt, i, numOptions = 0;
+   char* device = NULL;
+   Options theOptions[MAX_OPTIONS];
+
+   printf("GPT fdisk (sgdisk) version 0.5.4-pre1\n\n");
+   numOptions = ParseOptions(argc, argv, theOptions, &device);
+
+   if (device != NULL) {
+      if (theGPT.LoadPartitions(device)) {
+         for (i = 0; i < numOptions; i++) {
+            switch (theOptions[i].theCommand) {
+               case LIST:
+                  theGPT.JustLooking();
+                  theGPT.DisplayGPTData();
+                  break;
+               case VERIFY:
+                  theGPT.JustLooking();
+                  theGPT.Verify();
+                  break;
+               case NONE:
+                  printf("Usage: %s {-lv} device\n", argv[0]);
+                  break;
+            } // switch
+         } // for
+      } // if loaded OK
+   } // if (device != NULL)
+
+   return 0;
+} // main
+
+// Parse command-line options. Returns the number of arguments retrieved
+int ParseOptions(int argc, char* argv[], Options* theOptions, char** device) {
+   int opt, i, numOptions = 0;
+   int verbose_flag;
+
+   // Use getopt() to extract commands and their arguments
+   /* getopt_long stores the option index here. */
+   int option_index = 0;
+
+//   c = getopt_long (argc, argv, "abc:d:f:",
+//                    long_options, &option_index);
+
+   while (((opt = getopt_long(argc, argv, "vl", long_options, &option_index)) != -1)
+          && (numOptions < MAX_OPTIONS)) {
+      printf("opt is %c, option_index is %d\n", opt, option_index);
+      switch (opt) {
+         case 'l':
+            printf("Entering list option, numOptions = %d!\n", numOptions);
+            theOptions[numOptions].theCommand = LIST;
+            theOptions[numOptions++].theArgument = NULL;
+            break;
+         case 'v':
+            theOptions[numOptions].theCommand = VERIFY;
+            theOptions[numOptions++].theArgument = NULL;
+            break;
+         default:
+            printf("Default switch; opt is %c\n", opt);
+            break;
+//            abort();
+      } // switch
+   } // while
+
+   // Find non-option arguments. If the user types a legal command, there
+   // will be only one of these: The device filename....
+   opt = 0;
+   printf("Searching for device filename; optind is %d\n", optind);
+   for (i = optind; i < argc; i++) {
+      *device = argv[i];
+      printf("Setting device to %s\n", argv[i]);
+      opt++;
+   } // for
+   if (opt > 1) {
+      fprintf(stderr, "Warning! Found stray unrecognized arguments! Program may misbehave!\n");
+   } // if
+
+   return numOptions;
+} // ParseOptions()
+
+/* // Accept a command and execute it. Returns only when the user
+// wants to exit (such as after a 'w' or 'q' command).
+void MainMenu(char* filename, struct GPTData* theGPT) {
+   char command, line[255], buFile[255];
+   char* junk;
+   int goOn = 1;
+   PartTypes typeHelper;
+   uint32_t temp1, temp2;
+
+   do {
+      printf("\nCommand (? for help): ");
+      junk = fgets(line, 255, stdin);
+      sscanf(line, "%c", &command);
+      switch (command) {
+         case 'b': case 'B':
+            printf("Enter backup filename to save: ");
+            junk = fgets(line, 255, stdin);
+            sscanf(line, "%s", (char*) &buFile);
+            theGPT->SaveGPTBackup(buFile);
+            break;
+         case 'c': case 'C':
+            if (theGPT->GetPartRange(&temp1, &temp2) > 0)
+               theGPT->SetName(theGPT->GetPartNum());
+            else
+               printf("No partitions\n");
+            break;
+         case 'd': case 'D':
+            theGPT->DeletePartition();
+            break;
+         case 'i': case 'I':
+            theGPT->ShowDetails();
+            break;
+         case 'l': case 'L':
+            typeHelper.ShowTypes();
+            break;
+         case 'n': case 'N':
+            theGPT->CreatePartition();
+            break;
+         case 'o': case 'O':
+            printf("This option deletes all partitions and creates a new "
+                  "protective MBR.\nProceed? ");
+            if (GetYN() == 'Y') {
+               theGPT->ClearGPTData();
+               theGPT->MakeProtectiveMBR();
+            } // if
+            break;
+         case 'p': case 'P':
+            theGPT->DisplayGPTData();
+            break;
+         case 'q': case 'Q':
+            goOn = 0;
+            break;
+         case 'r': case 'R':
+            RecoveryMenu(filename, theGPT);
+            goOn = 0;
+            break;
+         case 's': case 'S':
+            theGPT->SortGPT();
+            printf("You may need to edit /etc/fstab and/or your boot loader configuration!\n");
+            break;
+         case 't': case 'T':
+            theGPT->ChangePartType();
+            break;
+         case 'v': case 'V':
+            if (theGPT->Verify() > 0) { // problems found
+               printf("You may be able to correct the problems by using options on the experts\n"
+                     "menu (press 'x' at the command prompt). Good luck!\n");
+            } // if
+            break;
+         case 'w': case 'W':
+            if (theGPT->SaveGPTData() == 1)
+               goOn = 0;
+            break;
+         case 'x': case 'X':
+            ExpertsMenu(filename, theGPT);
+            goOn = 0;
+            break;
+         default:
+            ShowCommands();
+            break;
+      } // switch
+   } while (goOn);
+} // MainMenu()
+
+void ShowCommands(void) {
+   printf("b\tback up GPT data to a file\n");
+   printf("c\tchange a partition's name\n");
+   printf("d\tdelete a partition\n");
+   printf("i\tshow detailed information on a partition\n");
+   printf("l\tlist known partition types\n");
+   printf("n\tadd a new partition\n");
+   printf("o\tcreate a new empty GUID partition table (GPT)\n");
+   printf("p\tprint the partition table\n");
+   printf("q\tquit without saving changes\n");
+   printf("r\trecovery and transformation options (experts only)\n");
+   printf("s\tsort partitions\n");
+   printf("t\tchange a partition's type code\n");
+   printf("v\tverify disk\n");
+   printf("w\twrite table to disk and exit\n");
+   printf("x\textra functionality (experts only)\n");
+   printf("?\tprint this menu\n");
+} // ShowCommands()
+
+// Accept a recovery & transformation menu command. Returns only when the user
+// issues an exit command, such as 'w' or 'q'.
+void RecoveryMenu(char* filename, struct GPTData* theGPT) {
+   char command, line[255], buFile[255];
+   char* junk;
+   PartTypes typeHelper;
+   uint32_t temp1;
+   int goOn = 1;
+
+   do {
+      printf("\nrecovery/transformation command (? for help): ");
+      junk = fgets(line, 255, stdin);
+      sscanf(line, "%c", &command);
+      switch (command) {
+         case 'b': case 'B':
+            theGPT->RebuildMainHeader();
+            break;
+         case 'c': case 'C':
+            printf("Warning! This will probably do weird things if you've converted an MBR to\n"
+                  "GPT form and haven't yet saved the GPT! Proceed? ");
+            if (GetYN() == 'Y')
+               theGPT->LoadSecondTableAsMain();
+            break;
+         case 'd': case 'D':
+            theGPT->RebuildSecondHeader();
+            break;
+         case 'e': case 'E':
+            printf("Warning! This will probably do weird things if you've converted an MBR to\n"
+                  "GPT form and haven't yet saved the GPT! Proceed? ");
+            if (GetYN() == 'Y')
+               theGPT->LoadMainTable();
+            break;
+         case 'f': case 'F':
+            printf("Warning! This will destroy the currently defined partitions! Proceed? ");
+            if (GetYN() == 'Y') {
+               if (theGPT->LoadMBR(filename) == 1) { // successful load
+                  theGPT->XFormPartitions();
+               } else {
+                  printf("Problem loading MBR! GPT is untouched; regenerating protective MBR!\n");
+                  theGPT->MakeProtectiveMBR();
+               } // if/else
+            } // if
+            break;
+         case 'g': case 'G':
+            temp1 = theGPT->XFormToMBR();
+            if (temp1 > 0) {
+               printf("Converted %d partitions. Finalize and exit? ", temp1);
+               if (GetYN() == 'Y') {
+                  if (theGPT->DestroyGPT(0) > 0)
+                     goOn = 0;
+               } else {
+                  theGPT->MakeProtectiveMBR();
+                  printf("Note: New protective MBR created.\n");
+               } // if/else
+            } // if
+            break;
+         case 'h': case 'H':
+            theGPT->MakeHybrid();
+            break;
+         case 'i': case 'I':
+            theGPT->ShowDetails();
+            break;
+         case 'l': case 'L':
+            printf("Enter backup filename to load: ");
+            junk = fgets(line, 255, stdin);
+            sscanf(line, "%s", (char*) &buFile);
+            theGPT->LoadGPTBackup(buFile);
+            break;
+         case 'm': case 'M':
+            MainMenu(filename, theGPT);
+            goOn = 0;
+            break;
+         case 'o': case 'O':
+            theGPT->DisplayMBRData();
+            break;
+         case 'p': case 'P':
+            theGPT->DisplayGPTData();
+            break;
+         case 'q': case 'Q':
+            goOn = 0;
+            break;
+         case 't': case 'T':
+            theGPT->XFormDisklabel();
+            break;
+         case 'v': case 'V':
+            theGPT->Verify();
+            break;
+         case 'w': case 'W':
+            if (theGPT->SaveGPTData() == 1) {
+               goOn = 0;
+            } // if
+            break;
+         case 'x': case 'X':
+            ExpertsMenu(filename, theGPT);
+            goOn = 0;
+            break;
+         default:
+            ShowRecoveryCommands();
+            break;
+      } // switch
+   } while (goOn);
+} // RecoveryMenu()
+
+void ShowRecoveryCommands(void) {
+   printf("b\tuse backup GPT header (rebuilding main)\n");
+   printf("c\tload backup partition table from disk (rebuilding main)\n");
+   printf("d\tuse main GPT header (rebuilding backup)\n");
+   printf("e\tload main partition table from disk (rebuilding backup)\n");
+   printf("f\tload MBR and build fresh GPT from it\n");
+   printf("g\tconvert GPT into MBR and exit\n");
+   printf("h\tmake hybrid MBR\n");
+   printf("i\tshow detailed information on a partition\n");
+   printf("l\tload partition data from a backup file\n");
+   printf("m\treturn to main menu\n");
+   printf("o\tprint protective MBR data\n");
+   printf("p\tprint the partition table\n");
+   printf("q\tquit without saving changes\n");
+   printf("t\ttransform BSD disklabel partition\n");
+   printf("v\tverify disk\n");
+   printf("w\twrite table to disk and exit\n");
+   printf("x\textra functionality (experts only)\n");
+   printf("?\tprint this menu\n");
+} // ShowRecoveryCommands()
+
+// Accept an experts' menu command. Returns only after the user
+// selects an exit command, such as 'w' or 'q'.
+void ExpertsMenu(char* filename, struct GPTData* theGPT) {
+   char command, line[255];
+   char* junk;
+   PartTypes typeHelper;
+   uint32_t pn;
+   uint32_t temp1, temp2;
+   int goOn = 1;
+
+   do {
+      printf("\nExpert command (? for help): ");
+      junk = fgets(line, 255, stdin);
+      sscanf(line, "%c", &command);
+      switch (command) {
+         case 'a': case 'A':
+            if (theGPT->GetPartRange(&temp1, &temp2) > 0)
+               theGPT->SetAttributes(theGPT->GetPartNum());
+           else
+               printf("No partitions\n");
+            break;
+         case 'c': case 'C':
+            if (theGPT->GetPartRange(&temp1, &temp2) > 0) {
+               pn = theGPT->GetPartNum();
+               printf("Enter the partition's new unique GUID:\n");
+               theGPT->SetPartitionGUID(pn, GetGUID());
+            } else printf("No partitions\n");
+            break;
+         case 'd': case 'D':
+            printf("The number of logical sectors per physical sector is %d.\n",
+                   theGPT->GetAlignment());
+            break;
+         case 'e': case 'E':
+            printf("Relocating backup data structures to the end of the disk\n");
+            theGPT->MoveSecondHeaderToEnd();
+            break;
+         case 'g': case 'G':
+            printf("Enter the disk's unique GUID:\n");
+            theGPT->SetDiskGUID(GetGUID());
+            break;
+         case 'i': case 'I':
+            theGPT->ShowDetails();
+            break;
+         case 'l': case 'L':
+            temp1 = GetNumber(1, 128, 8, "Enter the number of logical sectors in a physical sector on the\ndisk (1-128, default = 8): ");
+            theGPT->SetAlignment(temp1);
+            break;
+         case 'm': case 'M':
+            MainMenu(filename, theGPT);
+            goOn = 0;
+            break;
+         case 'n': case 'N':
+            theGPT->MakeProtectiveMBR();
+            break;
+         case 'o': case 'O':
+            theGPT->DisplayMBRData();
+            break;
+         case 'p': case 'P':
+            theGPT->DisplayGPTData();
+	    break;
+         case 'q': case 'Q':
+	    goOn = 0;
+	    break;
+         case 'r': case 'R':
+            RecoveryMenu(filename, theGPT);
+            goOn = 0;
+            break;
+         case 's': case 'S':
+            theGPT->ResizePartitionTable();
+            break;
+         case 'v': case 'V':
+            theGPT->Verify();
+            break;
+         case 'w': case 'W':
+            if (theGPT->SaveGPTData() == 1) {
+               goOn = 0;
+            } // if
+            break;
+         case 'z': case 'Z':
+            if (theGPT->DestroyGPT() == 1) {
+               goOn = 0;
+            }
+            break;
+         default:
+            ShowExpertCommands();
+            break;
+      } // switch
+   } while (goOn);
+} // ExpertsMenu()
+
+void ShowExpertCommands(void) {
+   printf("a\tset attributes\n");
+   printf("c\tchange partition GUID\n");
+   printf("d\tdisplay the number of logical sectors per physical sector\n");
+   printf("e\trelocate backup data structures to the end of the disk\n");
+   printf("g\tchange disk GUID\n");
+   printf("i\tshow detailed information on a partition\n");
+   printf("b\tset the number of logical sectors per physical sector\n");
+   printf("m\treturn to main menu\n");
+   printf("n\tcreate a new protective MBR\n");
+   printf("o\tprint protective MBR data\n");
+   printf("p\tprint the partition table\n");
+   printf("q\tquit without saving changes\n");
+   printf("r\trecovery and transformation options (experts only)\n");
+   printf("s\tresize partition table\n");
+   printf("v\tverify disk\n");
+   printf("w\twrite table to disk and exit\n");
+   printf("z\tzap (destroy) GPT data structures and exit\n");
+   printf("?\tprint this menu\n");
+} // ShowExpertCommands()
+*/