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Ventoy/LinuxGUI/Ventoy2Disk/Core/ventoy_util.c

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/******************************************************************************
* ventoy_util.c ---- ventoy util
* Copyright (c) 2021, longpanda <admin@ventoy.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <linux/fs.h>
#include <dirent.h>
#include <time.h>
#include <ventoy_define.h>
#include <ventoy_util.h>
uint8_t g_mbr_template[512];
void ventoy_gen_preudo_uuid(void *uuid)
{
int i;
int fd;
fd = open("/dev/urandom", O_RDONLY | O_BINARY);
if (fd < 0)
{
srand(time(NULL));
for (i = 0; i < 8; i++)
{
*((uint16_t *)uuid + i) = (uint16_t)(rand() & 0xFFFF);
}
}
else
{
read(fd, uuid, 16);
close(fd);
}
}
uint64_t ventoy_get_human_readable_gb(uint64_t SizeBytes)
{
int i;
int Pow2 = 1;
double Delta;
double GB = SizeBytes * 1.0 / 1000 / 1000 / 1000;
if ((SizeBytes % SIZE_1GB) == 0)
{
return (uint64_t)(SizeBytes / SIZE_1GB);
}
for (i = 0; i < 12; i++)
{
if (Pow2 > GB)
{
Delta = (Pow2 - GB) / Pow2;
}
else
{
Delta = (GB - Pow2) / Pow2;
}
if (Delta < 0.05)
{
return Pow2;
}
Pow2 <<= 1;
}
return (uint64_t)GB;
}
int ventoy_get_sys_file_line(char *buffer, int buflen, const char *fmt, ...)
{
int len;
char c;
char path[256];
va_list arg;
va_start(arg, fmt);
vsnprintf(path, 256, fmt, arg);
va_end(arg);
if (access(path, F_OK) >= 0)
{
FILE *fp = fopen(path, "r");
memset(buffer, 0, buflen);
len = (int)fread(buffer, 1, buflen - 1, fp);
fclose(fp);
while (len > 0)
{
c = buffer[len - 1];
if (c == '\r' || c == '\n' || c == ' ' || c == '\t')
{
buffer[len - 1] = 0;
len--;
}
else
{
break;
}
}
return 0;
}
else
{
vdebug("%s not exist \n", path);
return 1;
}
}
int ventoy_is_disk_mounted(const char *devpath)
{
int len;
int mount = 0;
char line[512];
FILE *fp = NULL;
fp = fopen("/proc/mounts", "r");
if (!fp)
{
return 0;
}
len = (int)strlen(devpath);
while (fgets(line, sizeof(line), fp))
{
if (strncmp(line, devpath, len) == 0)
{
mount = 1;
vdebug("%s mounted <%s>\n", devpath, line);
goto end;
}
}
end:
fclose(fp);
return mount;
}
static int ventoy_mount_path_escape(char *src, char *dst, int len)
{
int i = 0;
int n = 0;
dst[len - 1] = 0;
for (i = 0; i < len - 1; i++)
{
if (src[i] == '\\' && src[i + 1] == '0' && src[i + 2] == '4' && src[i + 3] == '0')
{
dst[n++] = ' ';
i += 3;
}
else
{
dst[n++] = src[i];
}
if (src[i] == 0)
{
break;
}
}
return 0;
}
int ventoy_try_umount_disk(const char *devpath)
{
int rc;
int len;
char line[1024];
char mntpt[1024];
char *pos1 = NULL;
char *pos2 = NULL;
FILE *fp = NULL;
fp = fopen("/proc/mounts", "r");
if (!fp)
{
return 0;
}
len = (int)strlen(devpath);
while (fgets(line, sizeof(line), fp))
{
if (strncmp(line, devpath, len) == 0)
{
pos1 = strchr(line, ' ');
if (pos1)
{
pos2 = strchr(pos1 + 1, ' ');
if (pos2)
{
*pos2 = 0;
}
ventoy_mount_path_escape(pos1 + 1, mntpt, sizeof(mntpt));
rc = umount(mntpt);
if (rc)
{
vdebug("umount <%s> <%s> [ failed ] error:%d\n", devpath, mntpt, errno);
}
else
{
vdebug("umount <%s> <%s> [ success ]\n", devpath, mntpt);
}
}
}
}
fclose(fp);
return 0;
}
int ventoy_read_file_to_buf(const char *FileName, int ExtLen, void **Bufer, int *BufLen)
{
int FileSize;
FILE *fp = NULL;
void *Data = NULL;
fp = fopen(FileName, "rb");
if (fp == NULL)
{
vlog("Failed to open file %s", FileName);
return 1;
}
fseek(fp, 0, SEEK_END);
FileSize = (int)ftell(fp);
Data = malloc(FileSize + ExtLen);
if (!Data)
{
fclose(fp);
return 1;
}
fseek(fp, 0, SEEK_SET);
fread(Data, 1, FileSize, fp);
fclose(fp);
*Bufer = Data;
*BufLen = FileSize;
return 0;
}
const char * ventoy_get_local_version(void)
{
int rc;
int FileSize;
char *Pos = NULL;
char *Buf = NULL;
static char LocalVersion[64] = { 0 };
if (LocalVersion[0] == 0)
{
rc = ventoy_read_file_to_buf("ventoy/version", 1, (void **)&Buf, &FileSize);
if (rc)
{
return "";
}
Buf[FileSize] = 0;
for (Pos = Buf; *Pos; Pos++)
{
if (*Pos == '\r' || *Pos == '\n')
{
*Pos = 0;
break;
}
}
scnprintf(LocalVersion, "%s", Buf);
free(Buf);
}
return LocalVersion;
}
int VentoyGetLocalBootImg(MBR_HEAD *pMBR)
{
memcpy(pMBR, g_mbr_template, 512);
return 0;
}
static int VentoyFillProtectMBR(uint64_t DiskSizeBytes, MBR_HEAD *pMBR)
{
ventoy_guid Guid;
uint32_t DiskSignature;
uint64_t DiskSectorCount;
VentoyGetLocalBootImg(pMBR);
ventoy_gen_preudo_uuid(&Guid);
memcpy(&DiskSignature, &Guid, sizeof(uint32_t));
vdebug("Disk signature: 0x%08x\n", DiskSignature);
memcpy(pMBR->BootCode + 0x1B8, &DiskSignature, 4);
memcpy(pMBR->BootCode + 0x180, &Guid, 16);
DiskSectorCount = DiskSizeBytes / 512 - 1;
if (DiskSectorCount > 0xFFFFFFFF)
{
DiskSectorCount = 0xFFFFFFFF;
}
memset(pMBR->PartTbl, 0, sizeof(pMBR->PartTbl));
pMBR->PartTbl[0].Active = 0x00;
pMBR->PartTbl[0].FsFlag = 0xee; // EE
pMBR->PartTbl[0].StartHead = 0;
pMBR->PartTbl[0].StartSector = 1;
pMBR->PartTbl[0].StartCylinder = 0;
pMBR->PartTbl[0].EndHead = 254;
pMBR->PartTbl[0].EndSector = 63;
pMBR->PartTbl[0].EndCylinder = 1023;
pMBR->PartTbl[0].StartSectorId = 1;
pMBR->PartTbl[0].SectorCount = (uint32_t)DiskSectorCount;
pMBR->Byte55 = 0x55;
pMBR->ByteAA = 0xAA;
pMBR->BootCode[92] = 0x22;
return 0;
}
static int ventoy_fill_gpt_partname(uint16_t Name[36], const char *asciiName)
{
int i;
int len;
memset(Name, 0, 36 * sizeof(uint16_t));
len = (int)strlen(asciiName);
for (i = 0; i < 36 && i < len; i++)
{
Name[i] = asciiName[i];
}
return 0;
}
int ventoy_fill_gpt(uint64_t size, uint64_t reserve, int align4k, VTOY_GPT_INFO *gpt)
{
uint64_t ReservedSector = 33;
uint64_t ModSectorCount = 0;
uint64_t Part1SectorCount = 0;
uint64_t DiskSectorCount = size / 512;
VTOY_GPT_HDR *Head = &gpt->Head;
VTOY_GPT_PART_TBL *Table = gpt->PartTbl;
ventoy_guid WindowsDataPartType = { 0xebd0a0a2, 0xb9e5, 0x4433, { 0x87, 0xc0, 0x68, 0xb6, 0xb7, 0x26, 0x99, 0xc7 } };
//ventoy_guid EspPartType = { 0xc12a7328, 0xf81f, 0x11d2, { 0xba, 0x4b, 0x00, 0xa0, 0xc9, 0x3e, 0xc9, 0x3b } };
//ventoy_guid BiosGrubPartType = { 0x21686148, 0x6449, 0x6e6f, { 0x74, 0x4e, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49 } };
VentoyFillProtectMBR(size, &gpt->MBR);
if (reserve > 0)
{
ReservedSector += reserve / 512;
}
Part1SectorCount = DiskSectorCount - ReservedSector - (VTOYEFI_PART_BYTES / 512) - 2048;
ModSectorCount = (Part1SectorCount % 8);
if (ModSectorCount)
{
vlog("Part1SectorCount:%llu is not aligned by 4KB (%llu)\n", (_ull)Part1SectorCount, (_ull)ModSectorCount);
}
// check aligned with 4KB
if (align4k)
{
if (ModSectorCount)
{
vdebug("Disk need to align with 4KB %u\n", (uint32_t)ModSectorCount);
Part1SectorCount -= ModSectorCount;
}
else
{
vdebug("no need to align with 4KB\n");
}
}
memcpy(Head->Signature, "EFI PART", 8);
Head->Version[2] = 0x01;
Head->Length = 92;
Head->Crc = 0;
Head->EfiStartLBA = 1;
Head->EfiBackupLBA = DiskSectorCount - 1;
Head->PartAreaStartLBA = 34;
Head->PartAreaEndLBA = DiskSectorCount - 34;
ventoy_gen_preudo_uuid(&Head->DiskGuid);
Head->PartTblStartLBA = 2;
Head->PartTblTotNum = 128;
Head->PartTblEntryLen = 128;
memcpy(&(Table[0].PartType), &WindowsDataPartType, sizeof(ventoy_guid));
ventoy_gen_preudo_uuid(&(Table[0].PartGuid));
Table[0].StartLBA = 2048;
Table[0].LastLBA = 2048 + Part1SectorCount - 1;
Table[0].Attr = 0;
ventoy_fill_gpt_partname(Table[0].Name, "Ventoy");
// to fix windows issue
//memcpy(&(Table[1].PartType), &EspPartType, sizeof(GUID));
memcpy(&(Table[1].PartType), &WindowsDataPartType, sizeof(ventoy_guid));
ventoy_gen_preudo_uuid(&(Table[1].PartGuid));
Table[1].StartLBA = Table[0].LastLBA + 1;
Table[1].LastLBA = Table[1].StartLBA + VTOYEFI_PART_BYTES / 512 - 1;
Table[1].Attr = 0xC000000000000001ULL;
ventoy_fill_gpt_partname(Table[1].Name, "VTOYEFI");
#if 0
memcpy(&(Table[2].PartType), &BiosGrubPartType, sizeof(ventoy_guid));
ventoy_gen_preudo_uuid(&(Table[2].PartGuid));
Table[2].StartLBA = 34;
Table[2].LastLBA = 2047;
Table[2].Attr = 0;
#endif
//Update CRC
Head->PartTblCrc = ventoy_crc32(Table, sizeof(gpt->PartTbl));
Head->Crc = ventoy_crc32(Head, Head->Length);
return 0;
}
int VentoyFillMBRLocation(uint64_t DiskSizeInBytes, uint32_t StartSectorId, uint32_t SectorCount, PART_TABLE *Table)
{
uint8_t Head;
uint8_t Sector;
uint8_t nSector = 63;
uint8_t nHead = 8;
uint32_t Cylinder;
uint32_t EndSectorId;
while (nHead != 0 && (DiskSizeInBytes / 512 / nSector / nHead) > 1024)
{
nHead = (uint8_t)nHead * 2;
}
if (nHead == 0)
{
nHead = 255;
}
Cylinder = StartSectorId / nSector / nHead;
Head = StartSectorId / nSector % nHead;
Sector = StartSectorId % nSector + 1;
Table->StartHead = Head;
Table->StartSector = Sector;
Table->StartCylinder = Cylinder;
EndSectorId = StartSectorId + SectorCount - 1;
Cylinder = EndSectorId / nSector / nHead;
Head = EndSectorId / nSector % nHead;
Sector = EndSectorId % nSector + 1;
Table->EndHead = Head;
Table->EndSector = Sector;
Table->EndCylinder = Cylinder;
Table->StartSectorId = StartSectorId;
Table->SectorCount = SectorCount;
return 0;
}
int ventoy_fill_mbr(uint64_t size, uint64_t reserve, int align4k, MBR_HEAD *pMBR)
{
ventoy_guid Guid;
uint32_t DiskSignature;
uint32_t DiskSectorCount;
uint32_t PartSectorCount;
uint32_t PartStartSector;
uint32_t ReservedSector;
VentoyGetLocalBootImg(pMBR);
ventoy_gen_preudo_uuid(&Guid);
memcpy(&DiskSignature, &Guid, sizeof(uint32_t));
vdebug("Disk signature: 0x%08x\n", DiskSignature);
memcpy(pMBR->BootCode + 0x1B8, &DiskSignature, 4);
memcpy(pMBR->BootCode + 0x180, &Guid, 16);
if (size / 512 > 0xFFFFFFFF)
{
DiskSectorCount = 0xFFFFFFFF;
}
else
{
DiskSectorCount = (uint32_t)(size / 512);
}
if (reserve <= 0)
{
ReservedSector = 0;
}
else
{
ReservedSector = (uint32_t)(reserve / 512);
}
// check aligned with 4KB
if (align4k)
{
uint64_t sectors = size / 512;
if (sectors % 8)
{
vlog("Disk need to align with 4KB %u\n", (uint32_t)(sectors % 8));
ReservedSector += (uint32_t)(sectors % 8);
}
else
{
vdebug("no need to align with 4KB\n");
}
}
vlog("ReservedSector: %u\n", ReservedSector);
//Part1
PartStartSector = VTOYIMG_PART_START_SECTOR;
PartSectorCount = DiskSectorCount - ReservedSector - VTOYEFI_PART_BYTES / 512 - PartStartSector;
VentoyFillMBRLocation(size, PartStartSector, PartSectorCount, pMBR->PartTbl);
pMBR->PartTbl[0].Active = 0x80; // bootable
pMBR->PartTbl[0].FsFlag = 0x07; // exFAT/NTFS/HPFS
//Part2
PartStartSector += PartSectorCount;
PartSectorCount = VTOYEFI_PART_BYTES / 512;
VentoyFillMBRLocation(size, PartStartSector, PartSectorCount, pMBR->PartTbl + 1);
pMBR->PartTbl[1].Active = 0x00;
pMBR->PartTbl[1].FsFlag = 0xEF; // EFI System Partition
pMBR->Byte55 = 0x55;
pMBR->ByteAA = 0xAA;
return 0;
}
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