FUSE compat: add MIME type faking

* Add special handling for reading the BEOS:TYPE attribute to supply
  on-the-fly fake MIME types for FUSE module filesystems, the same
  way it's done in our FAT and NTFS FS modules

* Reuse the mime_ext_table which we already have and put it into a
  shared location so we don't get further extra copies of it

headers/private/file_systems/mime_ext_table.h

@@ -0,0 +1,24 @@
+/*
+	Copyright 1999-2001, Be Incorporated.   All Rights Reserved.
+	This file may be used under the terms of the Be Sample Code License.
+*/
+
+#ifndef MIME_TYPES_H
+#define MIME_TYPES_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern const char* kAttrMimeTypeName;
+
+extern status_t set_mime(const char** mime, const char* filename);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif

src/add-ons/kernel/file_systems/shared/mime_ext_table.c

@@ -0,0 +1,156 @@
+/*
+	Copyright 1999-2001, Be Incorporated.   All Rights Reserved.
+	This file may be used under the terms of the Be Sample Code License.
+*/
+
+#include <SupportDefs.h>
+
+#include <string.h>
+
+#include <file_systems/mime_ext_table.h>
+
+
+struct ext_mime {
+	char *extension;
+	char *mime;
+};
+
+static struct ext_mime mimes[] = {
+	{ "gz", "application/x-gzip" },
+	{ "hqx", "application/x-binhex40" },
+	{ "lha", "application/x-lharc" },
+	{ "pcl", "application/x-pcl" },
+	{ "pdf", "application/pdf" },
+	{ "ps", "application/postscript" },
+	{ "sit", "application/x-stuff-it" },
+	{ "tar", "application/x-tar" },
+	{ "tgz", "application/x-gzip" },
+	{ "uue", "application/x-uuencode" },
+	{ "z", "application/x-compress" },
+	{ "zip", "application/zip" },
+	{ "zoo", "application/x-zoo" },
+	{ "rar", "application/x-rar" },
+	{ "pkg", "application/x-scode-UPkg" },
+	{ "7z", "application/x-7z-compressed" },
+	{ "bz2", "application/x-bzip2" },
+	{ "xz", "application/x-xz" },
+
+	{ "jar", "application/x-jar" },
+
+	{ "aif", "audio/x-aiff" },
+	{ "aiff", "audio/x-aiff" },
+	{ "au", "audio/basic" },
+	{ "mid", "audio/x-midi" },
+	{ "midi", "audio/x-midi" },
+	{ "mod", "audio/mod" },
+	{ "ra", "audio/x-real-audio" },
+	{ "wav", "audio/x-wav" },
+	{ "mp3", "audio/x-mpeg" },
+	{ "ogg", "audio/x-vorbis" },
+	{ "flac", "audio/x-flac" },
+	{ "wma", "audio/x-ms-wma" },
+
+	{ "avi", "video/x-msvideo" },
+	{ "mov", "video/quicktime" },
+	{ "qt", "video/quicktime" },
+	{ "mpg", "video/mpeg" },
+	{ "mpeg", "video/mpeg" },
+	{ "flv", "video/x-flv" },
+	{ "mp4", "video/mp4" },
+	{ "mkv", "video/x-matroska" },
+	{ "asf", "application/x-asf" },
+	{ "rm", "video/vnd.rn-realvideo" },
+	{ "wmv", "video/x-ms-wmv" },
+
+	{ "bmp", "image/x-bmp" },
+	{ "fax", "image/g3fax" },
+	{ "gif", "image/gif" },
+	{ "iff", "image/x-iff" },
+	{ "jpg", "image/jpeg" },
+	{ "jpeg", "image/jpeg" },
+	{ "pbm", "image/x-portable-bitmap" },
+	{ "pcx", "image/x-pcx" },
+	{ "pgm", "image/x-portable-graymap" },
+	{ "png", "image/png" },
+	{ "ppm", "image/x-portable-pixmap" },
+	{ "rgb", "image/x-rgb" },
+	{ "tga", "image/x-targa" },
+	{ "tif", "image/tiff" },
+	{ "tiff", "image/tiff" },
+	{ "xbm", "image/x-xbitmap" },
+	{ "djvu", "image/x-djvu" },
+	{ "svg", "image/svg+xml" },
+	{ "ico", "image/vnd.microsoft.icon" },
+
+	{ "doc", "application/msword" },
+	{ "xls", "application/vnd.ms-excel" },
+	{ "xls", "application/vnd.ms-excel" },
+	{ "xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" },
+	{ "docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document" },
+	{ "ppt", "application/vnd.ms-powerpoint" },
+	{ "pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation" },
+	{ "chm", "application/x-chm" },
+
+	{ "txt", "text/plain" },
+	{ "xml", "text/plain" },
+	{ "htm", "text/html" },
+	{ "html", "text/html" },
+	{ "rtf", "text/rtf" },
+	{ "c", "text/x-source-code" },
+	{ "cc", "text/x-source-code" },
+	{ "c++", "text/x-source-code" },
+	{ "h", "text/x-source-code" },
+	{ "hh", "text/x-source-code" },
+	{ "hpp", "text/x-source-code" },
+	{ "cxx", "text/x-source-code" },
+	{ "cpp", "text/x-source-code" },
+	{ "S", "text/x-source-code" },
+	{ "java", "text/x-source-code" },
+	{ "ini", "text/plain" },
+	{ "inf", "text/plain" },
+
+	{ "ttf", "application/x-truetype" },
+
+	{ NULL, NULL }
+};
+
+
+const char* kAttrMimeTypeName = "BEOS:TYPE";
+
+static const char* kFailBackMime = "application/octet-stream";
+static const char* kDirectoryMime = "application/x-vnd.Be-directory";
+
+
+status_t
+set_mime(const char** mime, const char* filename)
+{
+	struct ext_mime *p;
+	int32 namelen;
+	int32 ext_len;
+	*mime = NULL;
+
+	if (filename == NULL) {
+		*mime = kDirectoryMime;
+		return B_NO_ERROR;
+	}
+	namelen = strlen(filename);
+
+	for (p = mimes; p->extension; p++) {
+		ext_len = strlen(p->extension);
+
+		if (namelen <= ext_len)
+			continue;
+
+		if (filename[namelen-ext_len-1] != '.')
+			continue;
+
+		if (!strcasecmp(filename + namelen - ext_len, p->extension))
+			break;
+	}
+	if(p->mime == NULL)
+		*mime = kFailBackMime;
+	else
+		*mime = p->mime;
+
+	return B_NO_ERROR;
+}

src/add-ons/kernel/file_systems/userlandfs/server/fuse/FUSEVolume.cpp

@@ -6,6 +6,7 @@
 #include "FUSEVolume.h"
 
 #include <dirent.h>
+#include <file_systems/mime_ext_table.h>
 
 #include <algorithm>
 
@@ -282,18 +283,22 @@ private:
 
 struct FUSEVolume::AttrCookie : RWLockable {
 public:
-	AttrCookie()
+	AttrCookie(const char* name)
 		:
 		fValue(NULL),
-		fSize(0)
+		fSize(0),
+		fType(0)
 	{
+		_SetType(name);
 	}
 
-	AttrCookie(const char* value)
+	AttrCookie(const char* name, const char* value)
 		:
 		fValue(strdup(value)),
-		fSize(strlen(value) + 1)
+		fSize(strlen(value) + 1),
+		fType(0)
 	{
+		_SetType(name);
 	}
 
 	~AttrCookie()
@@ -306,6 +311,11 @@ public:
 		return fValue != NULL;
 	}
 
+	uint32 Type() const
+	{
+		return fType;
+	}
+
 	status_t Allocate(size_t size)
 	{
 		fValue = (char*)malloc(size);
@@ -341,9 +351,19 @@ public:
 		return fSize;
 	}
 
+private:
+	void _SetType(const char* name)
+	{
+		if (strcmp(name, kAttrMimeTypeName) == 0)
+			fType = B_MIME_STRING_TYPE;
+		else
+			fType = B_RAW_TYPE;
+	}
+
 private:
 	char*	fValue;
 	size_t	fSize;
+	uint32	fType;
 };
 
 
@@ -2165,10 +2185,22 @@ FUSEVolume::OpenAttr(void* _node, const char* name, int openMode,
 	locker.Unlock();
 
 	int attrSize = fuse_fs_getxattr(fFS, path, name, NULL, 0);
-	if (attrSize < 0)
+	if (attrSize < 0) {
-		return attrSize;
+		if (strcmp(name, kAttrMimeTypeName) == 0) {
+			// Return a fake MIME type attribute based on the file extension
+			const char* mimeType = NULL;
+			error = set_mime(&mimeType, S_ISDIR(node->type) ? NULL : &path[0]);
+			if (error != B_OK)
+				return error;
+			*_cookie = new(std::nothrow)AttrCookie(name, mimeType);
+			return B_OK;
+		}
 
-	AttrCookie* cookie = new(std::nothrow)AttrCookie();
+		// Reading attribute failed
+		return attrSize;
+	}
+
+	AttrCookie* cookie = new(std::nothrow)AttrCookie(name);
 	error = cookie->Allocate(attrSize);
 	if (error != B_OK)
 		RETURN_ERROR(error);
@@ -2227,7 +2259,7 @@ FUSEVolume::ReadAttrStat(void* _node, void* _cookie, struct stat* st)
 		RETURN_ERROR(B_BAD_VALUE);
 
 	st->st_size = cookie->Size();
-	st->st_type = B_RAW_TYPE;
+	st->st_type = cookie->Type();
 
 	return B_OK;
 }

src/add-ons/kernel/file_systems/userlandfs/server/fuse/Jamfile

@@ -27,7 +27,10 @@ SharedLibrary libuserlandfs_fuse.so
 	fuse_opt.c
 	FUSEFileSystem.cpp
 	FUSEVolume.cpp
-
+	mime_ext_table.c
 	:
 	<nogrist>userlandfs_server shared be [ TargetLibsupc++ ]
 ;
+
+SEARCH on [ FGristFiles mime_ext_table.c ]
+	+= [ FDirName $(HAIKU_TOP) src add-ons kernel file_systems shared ] ;