From: Joachim Metz <joachim.metz@gmail.com>
Date: Mon, 20 May 2024 12:07:21 +0200
Subject: Changes for fuse3 support

---
 ewftools/ewfmount.c    | 54 ++++++++++++++++++++++++++++++++++++++++++--------
 ewftools/mount_dokan.c | 12 +++++------
 ewftools/mount_fuse.c  | 38 +++++++++++++++++++++++++++++++++--
 ewftools/mount_fuse.h  | 39 ++++++++++++++++++++++++++++++------
 4 files changed, 121 insertions(+), 22 deletions(-)

diff --git a/ewftools/ewfmount.c b/ewftools/ewfmount.c
index 5b4831f..40c544f 100644
--- a/ewftools/ewfmount.c
+++ b/ewftools/ewfmount.c
@@ -1,5 +1,5 @@
 /*
- * Mounts an Expert Witness Compression Format (EWF) image file
+ * Mounts an Expert Witness Compression Format (EWF) image file.
  *
  * Copyright (C) 2006-2021, Joachim Metz <joachim.metz@gmail.com>
  *
@@ -158,12 +158,20 @@ int main( int argc, char * const argv[] )
 	ewftools_glob_t *glob                       = NULL;
 #endif
 
-#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE )
+#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE )
 	struct fuse_operations ewfmount_fuse_operations;
 
-	struct fuse_args ewfmount_fuse_arguments    = FUSE_ARGS_INIT(0, NULL);
-	struct fuse_chan *ewfmount_fuse_channel     = NULL;
-	struct fuse *ewfmount_fuse_handle           = NULL;
+#if defined( HAVE_LIBFUSE3 )
+	/* Need to set this to 1 even if there no arguments, otherwise this causes
+	 * fuse: empty argv passed to fuse_session_new()
+	 */
+	char *fuse_argv[ 2 ]                         = { program, NULL };
+	struct fuse_args ewfmount_fuse_arguments     = FUSE_ARGS_INIT(1, fuse_argv);
+#else
+	struct fuse_args ewfmount_fuse_arguments     = FUSE_ARGS_INIT(0, NULL);
+	struct fuse_chan *ewfmount_fuse_channel      = NULL;
+#endif
+	struct fuse *ewfmount_fuse_handle            = NULL;
 
 #elif defined( HAVE_LIBDOKAN )
 	DOKAN_OPERATIONS ewfmount_dokan_operations;
@@ -425,7 +433,7 @@ int main( int argc, char * const argv[] )
 		goto on_error;
 	}
 #endif
-#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE )
+#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE )
 	if( option_extended_options != NULL )
 	{
 		/* This argument is required but ignored
@@ -481,6 +489,34 @@ int main( int argc, char * const argv[] )
 	ewfmount_fuse_operations.getattr    = &mount_fuse_getattr;
 	ewfmount_fuse_operations.destroy    = &mount_fuse_destroy;
 
+#if defined( HAVE_LIBFUSE3 )
+	ewfmount_fuse_handle = fuse_new(
+	                        &ewfmount_fuse_arguments,
+	                        &ewfmount_fuse_operations,
+	                        sizeof( struct fuse_operations ),
+	                        ewfmount_mount_handle );
+
+	if( ewfmount_fuse_handle == NULL )
+	{
+		fprintf(
+		 stderr,
+		 "Unable to create fuse handle.\n" );
+
+		goto on_error;
+	}
+	result = fuse_mount(
+	          ewfmount_fuse_handle,
+	          mount_point );
+
+	if( result != 0 )
+	{
+		fprintf(
+		 stderr,
+		 "Unable to fuse mount file system.\n" );
+
+		goto on_error;
+	}
+#else
 	ewfmount_fuse_channel = fuse_mount(
 	                         mount_point,
 	                         &ewfmount_fuse_arguments );
@@ -508,6 +544,8 @@ int main( int argc, char * const argv[] )
 
 		goto on_error;
 	}
+#endif /* defined( HAVE_LIBFUSE3 ) */
+
 	if( verbose == 0 )
 	{
 		if( fuse_daemonize(
@@ -696,7 +734,7 @@ int main( int argc, char * const argv[] )
 
 	return( EXIT_FAILURE );
 
-#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE ) */
+#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE ) */
 
 on_error:
 	if( error != NULL )
@@ -706,7 +744,7 @@ on_error:
 		libcerror_error_free(
 		 &error );
 	}
-#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE )
+#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE )
 	if( ewfmount_fuse_handle != NULL )
 	{
 		fuse_destroy(
diff --git a/ewftools/mount_dokan.c b/ewftools/mount_dokan.c
index c06fa49..9fe9436 100644
--- a/ewftools/mount_dokan.c
+++ b/ewftools/mount_dokan.c
@@ -879,11 +879,11 @@ NTSTATUS __stdcall mount_dokan_ReadFile(
 		goto on_error;
 	}
 	read_count = mount_file_entry_read_buffer_at_offset(
-		      (mount_file_entry_t *) file_info->Context,
-		      buffer,
-		      (size_t) number_of_bytes_to_read,
-		      (off64_t) offset,
-		      &error );
+	              (mount_file_entry_t *) file_info->Context,
+	              buffer,
+	              (size_t) number_of_bytes_to_read,
+	              (off64_t) offset,
+	              &error );
 
 	if( read_count < 0 )
 	{
@@ -891,7 +891,7 @@ NTSTATUS __stdcall mount_dokan_ReadFile(
 		 &error,
 		 LIBCERROR_ERROR_DOMAIN_IO,
 		 LIBCERROR_IO_ERROR_READ_FAILED,
-		 "%s: unable to read from mount handle.",
+		 "%s: unable to read from file entry.",
 		 function );
 
 		result = MOUNT_DOKAN_ERROR_READ_FAULT;
diff --git a/ewftools/mount_fuse.c b/ewftools/mount_fuse.c
index 60f1ed4..07d099f 100644
--- a/ewftools/mount_fuse.c
+++ b/ewftools/mount_fuse.c
@@ -44,7 +44,7 @@
 
 extern mount_handle_t *ewfmount_mount_handle;
 
-#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE )
+#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE )
 
 #if ( SIZEOF_OFF_T != 8 ) && ( SIZEOF_OFF_T != 4 )
 #error Size of off_t not supported
@@ -255,11 +255,20 @@ int mount_fuse_filldir(
 
 		return( -1 );
 	}
+#if defined( HAVE_LIBFUSE3 )
+	if( filler(
+	     buffer,
+	     name,
+	     stat_info,
+	     0,
+	     0 ) == 1 )
+#else
 	if( filler(
 	     buffer,
 	     name,
 	     stat_info,
 	     0 ) == 1 )
+#endif
 	{
 		libcerror_error_set(
 		 error,
@@ -655,12 +664,22 @@ on_error:
 /* Reads a directory
  * Returns 0 if successful or a negative errno value otherwise
  */
+#if defined( HAVE_LIBFUSE3 )
+int mount_fuse_readdir(
+     const char *path,
+     void *buffer,
+     fuse_fill_dir_t filler,
+     off_t offset EWFTOOLS_ATTRIBUTE_UNUSED,
+     struct fuse_file_info *file_info EWFTOOLS_ATTRIBUTE_UNUSED,
+     enum fuse_readdir_flags flags EWFTOOLS_ATTRIBUTE_UNUSED )
+#else
 int mount_fuse_readdir(
      const char *path,
      void *buffer,
      fuse_fill_dir_t filler,
      off_t offset EWFTOOLS_ATTRIBUTE_UNUSED,
      struct fuse_file_info *file_info EWFTOOLS_ATTRIBUTE_UNUSED )
+#endif
 {
 	struct stat *stat_info                = NULL;
 	libcerror_error_t *error              = NULL;
@@ -675,6 +694,10 @@ int mount_fuse_readdir(
 
 	EWFTOOLS_UNREFERENCED_PARAMETER( offset )
 
+#if defined( HAVE_LIBFUSE3 )
+	EWFTOOLS_UNREFERENCED_PARAMETER( flags )
+#endif
+
 #if defined( HAVE_DEBUG_OUTPUT )
 	if( libcnotify_verbose != 0 )
 	{
@@ -1044,9 +1067,16 @@ on_error:
 /* Retrieves the file stat info
  * Returns 0 if successful or a negative errno value otherwise
  */
+#if defined( HAVE_LIBFUSE3 )
+int mount_fuse_getattr(
+     const char *path,
+     struct stat *stat_info,
+     struct fuse_file_info *file_info EWFTOOLS_ATTRIBUTE_UNUSED )
+#else
 int mount_fuse_getattr(
      const char *path,
      struct stat *stat_info )
+#endif
 {
 	libcerror_error_t *error       = NULL;
 	mount_file_entry_t *file_entry = NULL;
@@ -1058,6 +1088,10 @@ int mount_fuse_getattr(
 	uint16_t file_mode             = 0;
 	int result                     = 0;
 
+#if defined( HAVE_LIBFUSE3 )
+	EWFTOOLS_UNREFERENCED_PARAMETER( file_info )
+#endif
+
 #if defined( HAVE_DEBUG_OUTPUT )
 	if( libcnotify_verbose != 0 )
 	{
@@ -1314,5 +1348,5 @@ on_error:
 	return;
 }
 
-#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE ) */
+#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE ) */
 
diff --git a/ewftools/mount_fuse.h b/ewftools/mount_fuse.h
index a9eb9d9..09aa5b2 100644
--- a/ewftools/mount_fuse.h
+++ b/ewftools/mount_fuse.h
@@ -25,17 +25,27 @@
 #include <common.h>
 #include <types.h>
 
-#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE )
+#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE )
+
+#if !defined( FUSE_USE_VERSION ) && !defined( CYGFUSE )
+
+/* Ensure FUSE_USE_VERSION is defined before including fuse.h
+ */
+#if defined( HAVE_LIBFUSE3 )
+#define FUSE_USE_VERSION	30
+#else
 #define FUSE_USE_VERSION	26
+#endif
 
-#if defined( HAVE_LIBFUSE )
-#include <fuse.h>
+#endif /* !defined( FUSE_USE_VERSION ) && !defined( CYGFUSE ) */
 
+#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 )
+#include <fuse.h>
 #elif defined( HAVE_LIBOSXFUSE )
 #include <osxfuse/fuse.h>
 #endif
 
-#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE ) */
+#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE ) */
 
 #include "ewftools_libcerror.h"
 #include "ewftools_libewf.h"
@@ -46,7 +56,7 @@
 extern "C" {
 #endif
 
-#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE )
+#if defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE )
 
 int mount_fuse_set_stat_info(
      struct stat *stat_info,
@@ -84,25 +94,42 @@ int mount_fuse_opendir(
      const char *path,
      struct fuse_file_info *file_info );
 
+#if defined( HAVE_LIBFUSE3 )
+int mount_fuse_readdir(
+     const char *path,
+     void *buffer,
+     fuse_fill_dir_t filler,
+     off_t offset,
+     struct fuse_file_info *file_info,
+     enum fuse_readdir_flags flags );
+#else
 int mount_fuse_readdir(
      const char *path,
      void *buffer,
      fuse_fill_dir_t filler,
      off_t offset,
      struct fuse_file_info *file_info );
+#endif
 
 int mount_fuse_releasedir(
      const char *path,
      struct fuse_file_info *file_info );
 
+#if defined( HAVE_LIBFUSE3 )
+int mount_fuse_getattr(
+     const char *path,
+     struct stat *stat_info,
+     struct fuse_file_info *file_info );
+#else
 int mount_fuse_getattr(
      const char *path,
      struct stat *stat_info );
+#endif
 
 void mount_fuse_destroy(
       void *private_data );
 
-#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBOSXFUSE ) */
+#endif /* defined( HAVE_LIBFUSE ) || defined( HAVE_LIBFUSE3 ) || defined( HAVE_LIBOSXFUSE ) */
 
 #if defined( __cplusplus )
 }