[iso] add exception for Mint's LMDE

* Mint have decided to make their installation rely on a working /live/ ➔ /casper/ symlink for LMDE
  thereby breaking the promise of File System Transposition that all Debian derivatives should have.
* Because of this, trying to use FAT32 with LMDE will fail, as reported in linuxmint/live-installer#152.
* Therefore, now that we can replicate symlinks on NTFS, we add an exception to always enforce the use
  of NTFS for LMDE.

src/iso.c

@@ -464,6 +464,62 @@ static void fix_config(const char* psz_fullpath, const char* psz_path, const cha
 	free(src);
 }
 
+// This updates the MD5SUMS/md5sum.txt file that some distros (Ubuntu, Mint...)
+// use to validate the media. Because we may alter some of the validated files
+// to add persistence and whatnot, we need to alter the MD5 list as a result.
+// The format of the file is expected to always be "<MD5SUM> <FILE_PATH>" on
+// individual lines.
+static void update_md5sum(void)
+{
+	BOOL display_header = TRUE;
+	intptr_t pos;
+	uint32_t i, j, size, md5_size;
+	uint8_t* buf = NULL, sum[16];
+	char md5_path[64], * md5_data = NULL, * str_pos;
+
+	if (!img_report.has_md5sum)
+		goto out;
+
+	assert(img_report.has_md5sum <= ARRAYSIZE(md5sum_name));
+	if (img_report.has_md5sum > ARRAYSIZE(md5sum_name))
+		goto out;
+
+	static_sprintf(md5_path, "%s\\%s", psz_extract_dir, md5sum_name[img_report.has_md5sum - 1]);
+	md5_size = read_file(md5_path, (uint8_t**)&md5_data);
+	if (md5_size == 0)
+		goto out;
+
+	for (i = 0; i < modified_path.Index; i++) {
+		str_pos = strstr(md5_data, &modified_path.String[i][2]);
+		if (str_pos == NULL)
+			// File is not listed in md5 sums
+			continue;
+		if (display_header) {
+			uprintf("Updating %s:", md5_path);
+			display_header = FALSE;
+		}
+		uprintf("● %s", &modified_path.String[i][2]);
+		pos = str_pos - md5_data;
+		size = read_file(modified_path.String[i], &buf);
+		if (size == 0)
+			continue;
+		HashBuffer(HASH_MD5, buf, size, sum);
+		free(buf);
+		while ((pos > 0) && (md5_data[pos - 1] != '\n'))
+			pos--;
+		for (j = 0; j < 16; j++) {
+			md5_data[pos + 2 * j] = ((sum[j] >> 4) < 10) ? ('0' + (sum[j] >> 4)) : ('a' - 0xa + (sum[j] >> 4));
+			md5_data[pos + 2 * j + 1] = ((sum[j] & 15) < 10) ? ('0' + (sum[j] & 15)) : ('a' - 0xa + (sum[j] & 15));
+		}
+	}
+
+	write_file(md5_path, md5_data, md5_size);
+	free(md5_data);
+
+out:
+	StrArrayDestroy(&modified_path);
+}
+
 static void print_extracted_file(char* psz_fullpath, uint64_t file_length)
 {
 	size_t nul_pos;
@@ -644,62 +700,6 @@ out:
 	return 1;
 }
 
-// This updates the MD5SUMS/md5sum.txt file that some distros (Ubuntu, Mint...)
-// use to validate the media. Because we may alter some of the validated files
-// to add persistence and whatnot, we need to alter the MD5 list as a result.
-// The format of the file is expected to always be "<MD5SUM> <FILE_PATH>" on
-// individual lines.
-static void update_md5sum(void)
-{
-	BOOL display_header = TRUE;
-	intptr_t pos;
-	uint32_t i, j, size, md5_size;
-	uint8_t *buf = NULL, sum[16];
-	char md5_path[64], *md5_data = NULL, *str_pos;
-
-	if (!img_report.has_md5sum)
-		goto out;
-
-	assert(img_report.has_md5sum <= ARRAYSIZE(md5sum_name));
-	if (img_report.has_md5sum > ARRAYSIZE(md5sum_name))
-		goto out;
-
-	static_sprintf(md5_path, "%s\\%s", psz_extract_dir, md5sum_name[img_report.has_md5sum - 1]);
-	md5_size = read_file(md5_path, (uint8_t**)&md5_data);
-	if (md5_size == 0)
-		goto out;
-
-	for (i = 0; i < modified_path.Index; i++) {
-		str_pos = strstr(md5_data, &modified_path.String[i][2]);
-		if (str_pos == NULL)
-			// File is not listed in md5 sums
-			continue;
-		if (display_header) {
-			uprintf("Updating %s:", md5_path);
-			display_header = FALSE;
-		}
-		uprintf("● %s", &modified_path.String[i][2]);
-		pos = str_pos - md5_data;
-		size = read_file(modified_path.String[i], &buf);
-		if (size == 0)
-			continue;
-		HashBuffer(HASH_MD5, buf, size, sum);
-		free(buf);
-		while ((pos > 0) && (md5_data[pos - 1] != '\n'))
-			pos--;
-		for (j = 0; j < 16; j++) {
-			md5_data[pos + 2 * j] =     ((sum[j] >> 4) < 10) ? ('0' + (sum[j] >> 4)) : ('a' - 0xa + (sum[j] >> 4));
-			md5_data[pos + 2 * j + 1] = ((sum[j] & 15) < 10) ? ('0' + (sum[j] & 15)) : ('a' - 0xa + (sum[j] & 15));
-		}
-	}
-
-	write_file(md5_path, md5_data, md5_size);
-	free(md5_data);
-
-out:
-	StrArrayDestroy(&modified_path);
-}
-
 // Returns 0 on success, >0 on error, <0 to ignore current dir
 static int iso_extract_files(iso9660_t* p_iso, const char *psz_path)
 {
@@ -793,14 +793,20 @@ static int iso_extract_files(iso9660_t* p_iso, const char *psz_path)
 		} else {
 			file_length = p_statbuf->total_size;
 			if (check_iso_props(psz_path, file_length, psz_basename, psz_fullpath, &props)) {
+				if (is_symlink && (file_length == 0)) {
 					// Add symlink duplicated files to total_size at scantime
-				if (is_symlink && (file_length == 0) && (strcmp(psz_path, "/firmware") == 0)) {
+					if ((strcmp(psz_path, "/firmware") == 0)) {
 						static_sprintf(target_path, "%s/%s", psz_path, p_statbuf->rr.psz_symlink);
 						iso9660_stat_t* p_statbuf2 = iso9660_ifs_stat_translate(p_iso, target_path);
 						if (p_statbuf2 != NULL) {
 							extra_blocks += (p_statbuf2->total_size + ISO_BLOCKSIZE - 1) / ISO_BLOCKSIZE;
 							iso9660_stat_free(p_statbuf2);
 						}
+					} else if ((strcmp(p_statbuf->filename, "live") == 0) &&
+						(strcmp(p_statbuf->rr.psz_symlink, "casper") == 0)) {
+						// Mint LMDE requires working symbolic links and therefore requires the use of NTFS
+						img_report.needs_ntfs = TRUE;
+					}
 				}
 				continue;
 			}

src/rufus.c

@@ -184,8 +184,8 @@ static void SetAllowedFileSystems(void)
 		break;
 	case BT_IMAGE:
 		allowed_filesystem[FS_NTFS] = TRUE;
-		// Don't allow anything besides NTFS if the image has a >4GB file
+		// Don't allow anything besides NTFS if the image has a >4GB file or explicitly requires NTFS
-		if ((image_path != NULL) && (img_report.has_4GB_file))
+		if ((image_path != NULL) && (img_report.has_4GB_file || img_report.needs_ntfs))
 			break;
 		if (!HAS_WINDOWS(img_report) || (target_type != TT_BIOS) || allow_dual_uefi_bios) {
 			if (!HAS_WINTOGO(img_report) || (ComboBox_GetCurItemData(hImageOption) != IMOP_WIN_TO_GO)) {
@@ -1134,14 +1134,19 @@ static void DisplayISOProps(void)
 			(img_report.wininst_version >> 16) & 0xff, (img_report.wininst_version >> 8) & 0xff,
 			(img_report.wininst_version >= SPECIAL_WIM_VERSION) ? "+": "");
 	}
+	if (img_report.needs_ntfs) {
+		uprintf("  Note: This ISO uses symbolic links and was not designed to work without them.\r\n"
+			"  Because of this, only NTFS will be allowed as the target file system.");
+	} else {
 		PRINT_ISO_PROP(img_report.has_symlinks,
-		"  Note: This ISO uses symbolic links, which will not be replicated due to file system");
+			"  Note: This ISO uses symbolic links, which may not be replicated due to file system");
 		PRINT_ISO_PROP((img_report.has_symlinks == SYMLINKS_RR),
 			"  limitations. Because of this, some features from this image may not work...");
 		PRINT_ISO_PROP((img_report.has_symlinks == SYMLINKS_UDF),
 			"  limitations. Because of this, the size required for the target media may be much\r\n"
 			"  larger than size of the ISO...");
 	}
+}
 
 // Insert the image name into the Boot selection dropdown and (re)populate the Image option dropdown
 static void UpdateImage(BOOL update_image_option_only)

src/rufus.h

@@ -412,11 +412,12 @@ typedef struct {
 	BOOLEAN has_old_c32[NB_OLD_C32];
 	BOOLEAN has_old_vesamenu;
 	BOOLEAN has_efi_syslinux;
-	BOOLEAN needs_syslinux_overwrite;
 	BOOLEAN has_grub4dos;
 	uint8_t has_grub2;
 	BOOLEAN has_compatresources_dll;
 	BOOLEAN has_kolibrios;
+	BOOLEAN needs_syslinux_overwrite;
+	BOOLEAN needs_ntfs;
 	BOOLEAN uses_casper;
 	BOOLEAN uses_minint;
 	uint8_t compression_type;

src/rufus.rc

@@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 232, 326
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_ACCEPTFILES
-CAPTION "Rufus 4.3.2087"
+CAPTION "Rufus 4.3.2088"
 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
 BEGIN
     LTEXT           "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@@ -392,8 +392,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,3,2087,0
+ FILEVERSION 4,3,2088,0
- PRODUCTVERSION 4,3,2087,0
+ PRODUCTVERSION 4,3,2088,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -411,13 +411,13 @@ BEGIN
             VALUE "Comments", "https://rufus.ie"
             VALUE "CompanyName", "Akeo Consulting"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "4.3.2087"
+            VALUE "FileVersion", "4.3.2088"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2023 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
             VALUE "OriginalFilename", "rufus-4.3.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "4.3.2087"
+            VALUE "ProductVersion", "4.3.2088"
         END
     END
     BLOCK "VarFileInfo"