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rufus/src/syslinux.c
Pete Batard 299506056a [syslinux] fix support for recent Syslinux versions 
* Detect Syslinux version from isolinux.bin (Closes #272)
* Download required Syslinux v5+ files where needed (Closes #165)
* Also fix an issue where using a Syslinux based ISO didn't switch to ISO mode
* Also alter DownloadFile and ExtractISOFile to return a size
2014-01-21 21:59:09 +00:00

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/* ----------------------------------------------------------------------- *
*
* Copyright 2003 Lars Munch Christensen - All Rights Reserved
* Copyright 1998-2008 H. Peter Anvin - All Rights Reserved
* Copyright 2012-2014 Pete Batard
*
* Based on the Linux installer program for SYSLINUX by H. Peter Anvin
*
* 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, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/* Memory leaks detection - define _CRTDBG_MAP_ALLOC as preprocessor macro */
#ifdef _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#endif
#include <windows.h>
#include <windowsx.h>
#include <stdio.h>
#include <malloc.h>
#include <ctype.h>
#include "rufus.h"
#include "drive.h"
#include "resource.h"
#include "localization.h"
#include "msapi_utf8.h"
#include "syslinux.h"
#include "syslxfs.h"
#include "libfat.h"
#include "setadv.h"
unsigned char* syslinux_ldlinux[2] = { NULL, NULL };
DWORD syslinux_ldlinux_len[2];
unsigned char* syslinux_mboot = NULL;
DWORD syslinux_mboot_len;
/*
* Wrapper for ReadFile suitable for libfat
*/
int libfat_readfile(intptr_t pp, void *buf, size_t secsize,
libfat_sector_t sector)
{
uint64_t offset = (uint64_t) sector * secsize;
LONG loword = (LONG) offset;
LONG hiword = (LONG) (offset >> 32);
LONG hiwordx = hiword;
DWORD bytes_read;
if (SetFilePointer((HANDLE) pp, loword, &hiwordx, FILE_BEGIN) != loword ||
hiword != hiwordx ||
!ReadFile((HANDLE) pp, buf, (DWORD)secsize, &bytes_read, NULL) ||
bytes_read != secsize) {
uprintf("Cannot read sector %u\n", sector);
return 0;
}
return (int)secsize;
}
/*
* Extract the ldlinux.sys and ldlinux.bss from resources,
* then patch and install them
*/
BOOL InstallSyslinux(DWORD drive_index, char drive_letter)
{
HANDLE f_handle = INVALID_HANDLE_VALUE;
HANDLE d_handle = INVALID_HANDLE_VALUE;
DWORD bytes_read;
DWORD bytes_written;
BOOL r = FALSE;
FILE* fd;
size_t len;
static unsigned char sectbuf[SECTOR_SIZE];
static char* resource[2][2] = {
{ MAKEINTRESOURCEA(IDR_SL_LDLINUX_V4_SYS), MAKEINTRESOURCEA(IDR_SL_LDLINUX_V4_BSS) },
{ MAKEINTRESOURCEA(IDR_SL_LDLINUX_V5_SYS), MAKEINTRESOURCEA(IDR_SL_LDLINUX_V5_BSS) } };
const char* ldlinux = "ldlinux";
const char* syslinux = "syslinux";
const char* ldlinux_ext[3] = { "sys", "bss", "c32" };
const char* mboot_c32 = "mboot.c32";
char path[MAX_PATH], tmp[64];
struct libfat_filesystem *fs;
libfat_sector_t s, *secp;
libfat_sector_t *sectors = NULL;
int ldlinux_sectors;
uint32_t ldlinux_cluster;
int i, nsectors;
int dt = (int)ComboBox_GetItemData(hBootType, ComboBox_GetCurSel(hBootType));
BOOL use_v5 = (dt == DT_SYSLINUX_V5) || ((dt == DT_ISO) && (SL_MAJOR(iso_report.sl_version) >= 5));
PrintStatus(0, TRUE, MSG_234, (dt == DT_ISO)?iso_report.sl_version_str:embedded_sl_version_str[use_v5?1:0]);
/* Initialize the ADV -- this should be smarter */
syslinux_reset_adv(syslinux_adv);
/* Access a copy of the ldlinux.sys & ldlinux.bss resources (downloaded or embedded) */
if ((syslinux_ldlinux_len[0] != 0) && (syslinux_ldlinux_len[1] != 0)) {
_chdirU(app_dir);
for (i=0; i<2; i++) {
syslinux_ldlinux[i] = (unsigned char*) malloc(syslinux_ldlinux_len[i]);
if (syslinux_ldlinux[i] == NULL)
goto out;
static_sprintf(path, "%s/%s-%s/%s.%s", FILES_DIR, syslinux, &iso_report.sl_version_str[1], ldlinux, i==0?"sys":"bss");
fd = fopen(path, "rb");
if (fd == NULL) {
uprintf("Could not open %s\n", path);
goto out;
}
len = fread(syslinux_ldlinux[i], 1, (size_t)syslinux_ldlinux_len[i], fd);
fclose(fd);
if (len != (size_t)syslinux_ldlinux_len[i]) {
uprintf("Could not read %s\n", path);
goto out;
}
uprintf("Using existing './%s'\n", path);
}
} else {
for (i=0; i<2; i++) {
static_sprintf(tmp, "%s.%s", ldlinux, ldlinux_ext[i]);
syslinux_ldlinux[i] = GetResource(hMainInstance, resource[use_v5?1:0][i],
_RT_RCDATA, tmp, &syslinux_ldlinux_len[i], TRUE);
if (syslinux_ldlinux[i] == NULL)
goto out;
}
}
/* Create ldlinux.sys file */
static_sprintf(path, "%C:\\%s.%s", drive_letter, ldlinux, ldlinux_ext[0]);
f_handle = CreateFileA(path, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, CREATE_ALWAYS,
FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_SYSTEM |
FILE_ATTRIBUTE_HIDDEN, NULL);
if (f_handle == INVALID_HANDLE_VALUE) {
uprintf("Unable to create '%s'\n", &path[3]);
goto out;
}
/* Write ldlinux.sys file */
if (!WriteFile(f_handle, syslinux_ldlinux[0], syslinux_ldlinux_len[0],
&bytes_written, NULL) ||
bytes_written != syslinux_ldlinux_len[0]) {
uprintf("Could not write '%s'\n", &path[3]);
goto out;
}
if (!WriteFile(f_handle, syslinux_adv, 2 * ADV_SIZE,
&bytes_written, NULL) ||
bytes_written != 2 * ADV_SIZE) {
uprintf("Could not write ADV to '%s'\n", &path[3]);
goto out;
}
uprintf("Successfully wrote '%s'\n", &path[3]);
if (dt != DT_ISO)
UpdateProgress(OP_DOS, -1.0f);
/* Now flush the media */
if (!FlushFileBuffers(f_handle)) {
uprintf("FlushFileBuffers failed\n");
goto out;
}
/* Reopen the volume (we already have a lock) */
d_handle = GetLogicalHandle(drive_index, TRUE, FALSE);
if (d_handle == INVALID_HANDLE_VALUE) {
uprintf("Could open volume for Syslinux installation\n");
goto out;
}
/* Map the file (is there a better way to do this?) */
ldlinux_sectors = (syslinux_ldlinux_len[0] + 2 * ADV_SIZE + SECTOR_SIZE - 1) >> SECTOR_SHIFT;
sectors = (libfat_sector_t*) calloc(ldlinux_sectors, sizeof *sectors);
if (sectors == NULL)
goto out;
fs = libfat_open(libfat_readfile, (intptr_t) d_handle);
if (fs == NULL) {
uprintf("Syslinux FAT access error\n");
goto out;
}
ldlinux_cluster = libfat_searchdir(fs, 0, "LDLINUX SYS", NULL);
secp = sectors;
nsectors = 0;
s = libfat_clustertosector(fs, ldlinux_cluster);
while (s && nsectors < ldlinux_sectors) {
*secp++ = s;
nsectors++;
s = libfat_nextsector(fs, s);
}
libfat_close(fs);
/* Patch ldlinux.sys and the boot sector */
syslinux_patch(sectors, nsectors, 0, 0, NULL, NULL);
/* Rewrite the file */
if (SetFilePointer(f_handle, 0, NULL, FILE_BEGIN) != 0 ||
!WriteFile(f_handle, syslinux_ldlinux[0], syslinux_ldlinux_len[0],
&bytes_written, NULL)
|| bytes_written != syslinux_ldlinux_len[0]) {
uprintf("Could not write '%s': %s\n", &path[3], WindowsErrorString());
goto out;
}
/* Close file */
safe_closehandle(f_handle);
/* Read existing FAT data into boot sector */
if (SetFilePointer(d_handle, 0, NULL, FILE_BEGIN) != 0 ||
!ReadFile(d_handle, sectbuf, SECTOR_SIZE,
&bytes_read, NULL)
|| bytes_read != SECTOR_SIZE) {
uprintf("Could not read boot record: %s\n", WindowsErrorString());
goto out;
}
/* Make the syslinux boot sector */
syslinux_make_bootsect(sectbuf, VFAT);
/* Write boot sector back */
if (SetFilePointer(d_handle, 0, NULL, FILE_BEGIN) != 0 ||
!WriteFile(d_handle, sectbuf, SECTOR_SIZE,
&bytes_written, NULL)
|| bytes_written != SECTOR_SIZE) {
uprintf("Could not write Syslinux boot record: %s\n", WindowsErrorString());
goto out;
}
uprintf("Successfully wrote Syslinux boot record\n");
if (dt == DT_SYSLINUX_V5) {
_chdirU(app_dir);
static_sprintf(path, "%s/%s-%s", FILES_DIR, syslinux, &embedded_sl_version_str[1][1]);
_chdir(path);
static_sprintf(path, "%C:\\%s.%s", drive_letter, ldlinux, ldlinux_ext[2]);
fd = fopen(&path[3], "rb");
if (fd == NULL) {
uprintf("Caution: No '%s' was provided. The target will be missing a required Syslinux file!\n", &path[3]);
} else {
fclose(fd);
if (CopyFileA(&path[3], path, TRUE)) {
uprintf("Created '%s' (from '%s/%s-%s/%s')", path, FILES_DIR, syslinux, &embedded_sl_version_str[1][1], &path[3]);
} else {
uprintf("Failed to create '%s': %s\n", path, WindowsErrorString());
}
}
} else if (IS_REACTOS(iso_report)) {
uprintf("Setting up ReactOS...\n");
syslinux_mboot = GetResource(hMainInstance, MAKEINTRESOURCEA(IDR_SL_MBOOT_C32),
_RT_RCDATA, "mboot.c32", &syslinux_mboot_len, FALSE);
if (syslinux_mboot == NULL) {
goto out;
}
/* Create mboot.c32 file */
static_sprintf(path, "%C:\\%s", drive_letter, mboot_c32);
f_handle = CreateFileA(path, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (f_handle == INVALID_HANDLE_VALUE) {
uprintf("Unable to create '%s'\n", path);
goto out;
}
if (!WriteFile(f_handle, syslinux_mboot, syslinux_mboot_len,
&bytes_written, NULL) ||
bytes_written != syslinux_mboot_len) {
uprintf("Could not write '%s'\n", path);
goto out;
}
safe_closehandle(f_handle);
static_sprintf(path, "%C:\\syslinux.cfg", drive_letter);
fd = fopen(path, "w");
if (fd == NULL) {
uprintf("Could not create ReactOS 'syslinux.cfg'\n");
goto out;
}
/* Write the syslinux.cfg for ReactOS */
fprintf(fd, "DEFAULT ReactOS\nLABEL ReactOS\n KERNEL %s\n APPEND %s\n",
mboot_c32, iso_report.reactos_path);
fclose(fd);
}
if (dt != DT_ISO)
UpdateProgress(OP_DOS, -1.0f);
r = TRUE;
out:
safe_free(syslinux_ldlinux[0]);
safe_free(syslinux_ldlinux[1]);
safe_free(sectors);
safe_closehandle(d_handle);
safe_closehandle(f_handle);
return r;
}
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