diff options
Diffstat (limited to 'cgpt/cgpt_boot.c')
| -rw-r--r-- | cgpt/cgpt_boot.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/cgpt/cgpt_boot.c b/cgpt/cgpt_boot.c index 15e98cfa..33c5471c 100644 --- a/cgpt/cgpt_boot.c +++ b/cgpt/cgpt_boot.c @@ -12,6 +12,55 @@ #include "endian.h" #include "cgpt_params.h" + +int cgpt_get_boot_partition_number(CgptBootParams *params) { + struct drive drive; + int gpt_retval= 0; + int retval; + + if (params == NULL) + return CGPT_FAILED; + + if (CGPT_OK != DriveOpen(params->drive_name, &drive)) + return CGPT_FAILED; + + if (GPT_SUCCESS != (gpt_retval = GptSanityCheck(&drive.gpt))) { + Error("GptSanityCheck() returned %d: %s\n", + gpt_retval, GptError(gpt_retval)); + retval = CGPT_FAILED; + goto done; + } + + if (CGPT_OK != ReadPMBR(&drive)) { + Error("Unable to read PMBR\n"); + goto done; + } + + char buf[GUID_STRLEN]; + GuidToStr(&drive.pmbr.boot_guid, buf, sizeof(buf)); + + int numEntries = GetNumberOfEntries(&drive.gpt); + int i; + for(i = 0; i < numEntries; i++) { + GptEntry *entry = GetEntry(&drive.gpt, ANY_VALID, i); + + if (GuidEqual(&entry->unique, &drive.pmbr.boot_guid)) { + params->partition = i + 1; + retval = CGPT_OK; + goto done; + } + } + + Error("Didn't find any boot partition\n"); + params->partition = 0; + retval = CGPT_FAILED; + +done: + (void) DriveClose(&drive, 1); + return retval; +} + + int cgpt_boot(CgptBootParams *params) { struct drive drive; int retval = 1; @@ -20,7 +69,7 @@ int cgpt_boot(CgptBootParams *params) { if (params == NULL) return CGPT_FAILED; - if (CGPT_OK != DriveOpen(params->driveName, &drive)) + if (CGPT_OK != DriveOpen(params->drive_name, &drive)) return CGPT_FAILED; if (CGPT_OK != ReadPMBR(&drive)) { |