* Initial working r_fs API with ext2 fs

- Support file reading and directory listing
* Fix build

binr/radare2/radare2.c

@@ -81,6 +81,7 @@ int main(int argc, char **argv) {
 	int fullfile = 0;
 	ut32 bsize = 0;
 	ut64 seek = 0;
+	char *cmdfile = NULL;
 
 	if (argc<2)
 		return main_help (1);
@@ -98,7 +99,7 @@ int main(int argc, char **argv) {
 			r_config_set (r.config, "file.project", optarg);
 			break;
 		case 'i':
-			r_core_cmd_file (&r, optarg);
+			cmdfile = optarg;
 			break;
 		case 'l':
 			r_lib_open (r.lib, optarg);
@@ -262,6 +263,9 @@ int main(int argc, char **argv) {
 #endif
 	} else eprintf ("Metadata loaded from 'file.project'\n");
 
+	if (cmdfile)
+		r_core_cmd_file (&r, cmdfile);
+
 	if (r_io_is_listener (r.io))
 		r_core_serve (&r, r.io->fd);
 	else

libr/Makefile

@@ -7,7 +7,7 @@ PFX=${DESTDIR}${PREFIX}
 
 # Libraries
 LIBLIST=util vm socket cons line lib io lang flags bin hash config syscall cmd
-LIBLIST+=reg asm anal print parse search diff bp sign th db crypto debug core fs
+LIBLIST+=reg asm anal print parse search diff bp sign th db crypto debug fs core
 
 # TODO : generate single library linking against the rest
 #LIBSO=libr.so

libr/core/cmd.c

@@ -924,7 +924,7 @@ static int cmd_yank_to(RCore *core, char *arg) {
 }
 
 static int cmd_mount(void *data, const char *_input) {
-	char *input, *oinput, *ptr;
+	char *input, *oinput, *ptr, *ptr2;
 	RList *list;
 	RListIter *iter;
 	RFSFile *file;
@@ -940,8 +940,16 @@ static int cmd_mount(void *data, const char *_input) {
 			input++;
 		ptr = strchr (input, ' ');
 		if (ptr) {
+			ut64 delta = 0;
 			*ptr = 0;
-			r_fs_mount (core->fs, input, ptr+1);
+			ptr++;
+			ptr2 = strchr (ptr, ' ');
+			if (ptr2) {
+				*ptr2 = 0;
+				delta = r_num_math (core->num, ptr2+1);
+			}
+			//r_io_bind (core->io, &(core->fs->iob));
+			r_fs_mount (core->fs, input, ptr, delta);
 		} else eprintf ("Usage: m ext2 /mnt");
 		break;
 	case '-':
@@ -950,12 +958,12 @@ static int cmd_mount(void *data, const char *_input) {
 	case '*':
 		eprintf ("List commands in radare format\n");
 		r_list_foreach (core->fs->roots, iter, root) {
-			r_cons_printf ("m %s 0x%"PFMT64x" %s\n", root->fs->name, root->delta, root->path);
+			r_cons_printf ("m %s 0x%"PFMT64x" %s\n", root->p->name, root->delta, root->path);
 		}
 		break;
 	case '\0':
 		r_list_foreach (core->fs->roots, iter, root) {
-			r_cons_printf ("%s\t0x%"PFMT64x"\t%s\n", root->fs->name, root->delta, root->path);
+			r_cons_printf ("%s\t0x%"PFMT64x"\t%s\n", root->p->name, root->delta, root->path);
 		}
 		break;
 	case 'l': // list of plugins
@@ -994,7 +1002,7 @@ static int cmd_mount(void *data, const char *_input) {
 		r_cons_printf (
 		"Usage: m[-?*dgy] [...]\n"
 		" m        ; list all mountpoints in human readable format\n"
-		" m /mnt   ; list all mountpoints from a given path\n"
+		" m ext2 /mnt 0  ; mount ext2 fs at /mnt with delta 0 on IO\n"
 		" m*       ; same as above, but in r2 commands\n"
 		" ml       ; list filesystem plugins\n"
 		" m-/      ; umount given path (/)\n"

libr/core/core.c

@@ -203,8 +203,6 @@ R_API int r_core_init(RCore *core) {
 	core->print = r_print_new ();
 	core->print->printf = (void *)r_cons_printf;
 	core->lang = r_lang_new ();
-	core->fs = r_fs_new ();
-	r_io_bind (core->io, &(core->fs->iob));
 	r_lang_define (core->lang, "RCore", "core", core);
 	r_lang_set_user_ptr (core->lang, core);
 	core->anal = r_anal_new ();
@@ -221,6 +219,8 @@ R_API int r_core_init(RCore *core) {
 	core->sign = r_sign_new ();
 	core->search = r_search_new (R_SEARCH_KEYWORD);
 	r_io_undo_enable (core->io, 1, 0); // TODO: configurable via eval
+	core->fs = r_fs_new ();
+	r_io_bind (core->io, &(core->fs->iob));
 	//r_cmd_macro_init (&core->macro);
 	core->file = NULL;
 	INIT_LIST_HEAD (&core->files);

libr/fs/Makefile

@@ -2,9 +2,12 @@ NAME=r_fs
 DEPS=r_lib r_util r_io
 CFLAGS+=-DCORELIB -Iarch/include -Iarch
 
+CFLAGS+=-Ip/grub/include
+LDFLAGS+=p/grub/libgrubfs.a
+
 include ../config.mk
 
-foo: pre ${LIBSO} ${LIBAR} plugins
+foo: pre plugins ${LIBSO} ${LIBAR}
 
 include ${STATIC_FS_PLUGINS}
 STATIC_OBJS=$(subst ..,p/..,$(subst fs_,p/fs_,$(STATIC_OBJ)))
@@ -20,6 +23,10 @@ re:
 	sudo ${MAKE} install
 	cd t && ${MAKE}
 
+test:
+	#valgrind r2 -i test.rsc /tmp/test.fs.img
+	gdb --args r2 -i test.rsc /tmp/test.fs.img
+
 plugins:
 	cd p && ${MAKE} all
 

libr/fs/file.c

@@ -2,10 +2,12 @@
 
 #include <r_fs.h>
 
-R_API RFSFile *r_fs_file_new (const char *path) {
+R_API RFSFile *r_fs_file_new (RFSRoot *root, const char *path) {
 	RFSFile *file = R_NEW (RFSFile);
 	memset (file, 0, sizeof (RFSFile));
+	file->root = root;
 	file->name = strdup (path);
+	// TODO: concat path?
 	return file;
 }
 
@@ -24,6 +26,10 @@ R_API RFSRoot *r_fs_root_new (const char *path, ut64 delta) {
 }
 
 R_API void r_fs_root_free (RFSRoot *root) {
-	free (root->path);
-	free (root);
+	if (root) {
+		if (root->p && root->p->umount)
+			root->p->umount (root);
+		free (root->path);
+		free (root);
+	}
 }

libr/fs/fs.c

@@ -3,8 +3,7 @@
 #include <r_fs.h>
 #include "../config.h"
 
-static RFSPlugin *fs_static_plugins[] = 
-	{ R_FS_STATIC_PLUGINS };
+static RFSPlugin *fs_static_plugins[] = { R_FS_STATIC_PLUGINS };
 
 /* lifecycle */
 // TODO: needs much more love
@@ -59,18 +58,20 @@ R_API void r_fs_del (RFS *fs, RFSPlugin *p) {
 
 /* mountpoint */
 
-R_API RFSRoot *r_fs_mount (RFS* fs, const char *fstype, const char *path) {
+R_API RFSRoot *r_fs_mount (RFS* fs, const char *fstype, const char *path, ut64 delta) {
 	RFSPlugin *p;
-	RFSRoot * root;
+	RFSRoot *root;
 	if (path[0] != '/') {
 		eprintf ("r_fs_mount: invalid mountpoint\n");
 		return NULL;
 	}
-	//r_fs
 	p = r_fs_plugin_get (fs, fstype);
 	if (p != NULL) {
-		root = r_fs_root_new (path, 0); // XXX hardcoded offset
-		root->fs = p;
+		root = r_fs_root_new (path, delta);
+		root->p = p;
+		//memcpy (&root->iob, &fs->iob, sizeof (root->iob));
+		root->iob = fs->iob;
+		p->mount (root);
 		r_list_append (fs->roots, root);
 		eprintf ("Mounted %s on %s at 0x%llx\n", fstype, path, 0LL);
 	} else eprintf ("r_fs_mount: Invalid filesystem type\n");
@@ -107,21 +108,29 @@ R_API RFSRoot *r_fs_root (RFS *fs, const char *path) {
 
 R_API RFSFile *r_fs_open (RFS* fs, const char *path) {
 	RFSRoot *root = r_fs_root (fs, path);
-	if (root)
-		return root->fs->open (path);
+	if (root && root->p && root->p->open)
+		return root->p->open (root, path+strlen (root->path));
+	else eprintf ("r_fs_open: null root->p->open\n");
         return NULL;
 }
 
+// TODO: close or free?
 R_API void r_fs_close (RFS* fs, RFSFile *file) {
-	if (fs && file)
-		file->fs->close (file);
+	if (fs && file && file->p && file->p->close)
+		file->p->close (file);
 }
 
 R_API int r_fs_read (RFS* fs, RFSFile *file, ut64 addr, int len) {
+	if (len<1) {
+		eprintf ("r_fs_read: too short read\n");
+	} else
 	if (fs && file) {
 		free (file->data);
-		file->data = malloc (file->size);
-		file->fs->read (file, addr, len);
+		file->data = malloc (len+1);
+		if (file->p && file->p->read) {
+			file->p->read (file, addr, len);
+			return R_TRUE;
+		} else eprintf ("r_fs_read: file->p->read is null\n");
 	}
 	return R_FALSE;
 }
@@ -129,9 +138,29 @@ R_API int r_fs_read (RFS* fs, RFSFile *file, ut64 addr, int len) {
 R_API RList *r_fs_dir(RFS* fs, const char *path) {
 	if (fs) {
 		RFSRoot *root = r_fs_root (fs, path);
+		const char *dir = path + strlen (root->path);
+		if (!*dir) dir = "/";
 		if (root)
-			return root->fs->dir (root, path);
+			return root->p->dir (root, dir);
 		eprintf ("r_fs_dir: error, path %s is not mounted\n", path);
 	}
 	return NULL;
 }
+
+R_API RFSFile *r_fs_load(RFS* fs, const char *path) {
+	RFSFile *file = NULL;
+	RFSRoot *root = r_fs_root (fs, path);
+	if (root && root->p) {
+		if (root->p->open && root->p->read && root->p->close) {
+			file = root->p->open (root, path);
+			if (file) {
+				root->p->read (file, 0, file->size); //file->data, file->size);
+			} else eprintf ("r_fs_load: cannot open file\n");
+		} else {
+			if (root->p->load)
+				return root->p->load (root, path);
+			else eprintf ("r_fs_load: null root->p->load\n");
+		}
+	}
+	return file;
+}

libr/fs/p/Makefile

@@ -1,9 +1,7 @@
 include ../../config.mk
 
 CFLAGS+=-I../../include -Wall -shared -fPIC ${LDFLAGS_LIB} ${LDFLAGS_LINKPATH}..
-# XXX
-CFLAGS+=-DLIL_ENDIAN=1
-CFLAGS+=-L../../util -lr_util
+#CFLAGS+=-I../../include
 LDFLAGS+=${LINK}
 
 foo: all

libr/fs/p/ext2.mk

@@ -1,9 +1,12 @@
 OBJ_EXT2=fs_ext2.o
+EXTRA=../p/grub/libgrubfs.a
+CFLAGS+=-Igrub/include
 
 STATIC_OBJ+=${OBJ_EXT2}
+#STATIC_OBJ+=${EXTRA}
 TARGET_EXT2=fs_ext2.${EXT_SO}
 
 ALL_TARGETS+=${TARGET_EXT2}
 
 ${TARGET_EXT2}: ${OBJ_EXT2}
-	${CC} ${LDFLAGS} ${CFLAGS} -o ${TARGET_EXT2} ${OBJ_EXT2}
+	${CC} ${LDFLAGS} ${CFLAGS} -o ${TARGET_EXT2} ${OBJ_EXT2} ${EXTRA}

libr/fs/p/fs_ext2.c

@@ -1,20 +1,65 @@
-/* radare - LGPL - Copyright 2010 pancake<nopcode.org> */
+/* radare - LGPL - Copyright 2011 pancake<nopcode.org> */
 
 #include <r_fs.h>
+#include "grubfs.h"
 
-static RFSFile* ext2_open(const char *path) {
-	return NULL;
+static RFSFile* ext2_open(RFSRoot *root, const char *path) {
+	RFSFile *file = r_fs_file_new (root, path);
+	GrubFS *gfs = grubfs_new (&grub_ext2_fs, &root->iob);
+	file->ptr = gfs;
+	file->p = root->p;
+	if (gfs->file->fs->open (gfs->file, path)) {
+		r_fs_file_free (file);
+		grubfs_free (gfs);
+		file = NULL;
+	} else file->size = gfs->file->size;
+	return file;
 }
 
-static boolt ext2_read(RFSFile *fs, ut64 addr, int len) {
+static boolt ext2_read(RFSFile *file, ut64 addr, int len) {
+	GrubFS *gfs = file->ptr;
+	grubfs_bind_io (NULL, file->root->delta);
+	gfs->file->fs->read (gfs->file, (char*)file->data, len);
 	return R_FALSE;
 }
 
-static void ext2_close(RFSFile *fs) {
+static void ext2_close(RFSFile *file) {
+	GrubFS *gfs = file->ptr;
+	gfs->file->fs->close (gfs->file);
+}
+
+static RList *list = NULL;
+
+int dirhook (const char *filename, const struct grub_dirhook_info *info) {
+	RFSFile *fsf = r_fs_file_new (NULL, filename);
+	fsf->type = info->dir? 'd':'f';
+	fsf->time = info->mtime;
+	r_list_append (list, fsf);
+	//info->mtimeset
+	//info->case_insensitive
+	printf ("DIRFILE: %c (%d) %s\n", info->dir?'d':'f',
+			info->mtime, filename);
+	return 0;
 }
 
 static RList *ext2_dir(RFSRoot *root, const char *path) {
-	return NULL;
+	GrubFS *gfs = root->ptr;
+	list = r_list_new ();
+	eprintf ("ext2_dir: %s\n", path);
+	//gfs->file->device->data = &root->iob;
+	grubfs_bind_io (&root->iob, root->delta);
+	gfs->file->fs->dir (gfs->file->device, path, dirhook);
+	grubfs_bind_io (NULL, root->delta);
+	return list;
+}
+
+static void ext2_mount(RFSRoot *root) {
+	root->ptr = grubfs_new (&grub_ext2_fs, &root->iob);
+}
+
+static void ext2_umount(RFSRoot *root) {
+	grubfs_free (root->ptr);
+	root->ptr = NULL;
 }
 
 struct r_fs_plugin_t r_fs_plugin_ext2 = {
@@ -23,5 +68,7 @@ struct r_fs_plugin_t r_fs_plugin_ext2 = {
 	.open = ext2_open,
 	.read = ext2_read,
 	.close = ext2_close,
-	.dir = ext2_dir
+	.dir = ext2_dir,
+	.mount = ext2_mount,
+	.umount = ext2_umount,
 };

libr/fs/p/fs_ext2.d

@@ -1,6 +1,6 @@
-p/fs_ext2.o: p/fs_ext2.c ../include/r_fs.h ../include/r_types.h \
- ../include/r_userconf.h ../include/r_types_base.h /usr/include/stdio.h \
- /usr/include/features.h /usr/include/sys/cdefs.h \
+fs_ext2.o: fs_ext2.c ../../include/r_fs.h ../../include/r_types.h \
+ ../../include/r_userconf.h ../../include/r_types_base.h \
+ /usr/include/stdio.h /usr/include/features.h /usr/include/sys/cdefs.h \
  /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \
  /usr/include/gnu/stubs-32.h \
  /usr/lib/gcc/i686-pc-linux-gnu/4.5.2/include/stddef.h \
@@ -21,7 +21,13 @@ p/fs_ext2.o: p/fs_ext2.c ../include/r_fs.h ../include/r_types.h \
  /usr/include/bits/posix1_lim.h /usr/include/bits/local_lim.h \
  /usr/include/linux/limits.h /usr/include/unistd.h \
  /usr/include/bits/posix_opt.h /usr/include/bits/environments.h \
- /usr/include/bits/confname.h /usr/include/getopt.h ../include/r_list.h \
- ../include/r_flist.h ../include/r_io.h ../include/r_util.h \
- ../include/btree.h ../include/r_types.h ../include/list.h \
- /usr/include/gmp.h
+ /usr/include/bits/confname.h /usr/include/getopt.h \
+ ../../include/r_list.h ../../include/r_flist.h ../../include/r_io.h \
+ ../../include/r_util.h ../../include/btree.h ../../include/r_types.h \
+ ../../include/list.h /usr/include/gmp.h grub/include/grubfs.h \
+ grub/include/grub/file.h grub/include/grub/types.h grub/include/config.h \
+ grub/include/config-util.h grub/include/grub/cpu/types.h \
+ grub/include/grub/err.h grub/include/grub/symbol.h \
+ grub/include/grub/device.h grub/include/grub/fs.h \
+ grub/include/grub/list.h grub/include/grub/misc.h \
+ grub/include/grub/disk.h

libr/fs/p/grub/Makefile

@@ -1,5 +1,5 @@
-# TODO include ..config.mk
-CC?=gcc
+include ../../../config.mk
+#CC?=gcc
 KERNFILES=kern/file.c 
 KERNFILES+=kern/term.c kern/device.c
 KERNFILES+=kern/err.c
@@ -8,16 +8,18 @@ KERNFILES+=kern/fs.c kern/misc.c
 KERNFILES+=kern/time.c
 KERNFILES+=kern/list.c kern/partition.c
 KERNFILES+=fs/fshelp.c fs/ext2.c
-KERNFILES+=main.c
+#KERNFILES+=main.c
+KERNFILES+=grubfs.c
 
 KERNOBJS=$(subst .c,.o,${KERNFILES})
 CFLAGS=-Iinclude -g
+CFLAGS+=-I../../../include
 BIN=test${EXT_EXE}
 
-all: ${KERNOBJS} ${BIN}
+all: ${KERNOBJS} main.o ${BIN}
 
 ${BIN}:
-	${CC} -o ${BIN} ${CFLAGS} ${KERNOBJS}
+	${CC} -o ${BIN} main.o ${CFLAGS} ${KERNOBJS}
 
 lib: all libgrubfs.a
 	
@@ -27,5 +29,5 @@ libgrubfs.a:
 	ar -q libgrubfs.a ${KERNOBJS}
 
 clean:
-	rm -f ${KERNOBJS} ${BIN}
+	rm -f ${KERNOBJS} ${BIN} main.o
 	rm -f libgrubfs.a

libr/fs/p/grub/grubfs.c

@@ -0,0 +1,71 @@
+/* radare - LGPL - Copyright 2011 pancake<nopcode.org> */
+
+#include <r_io.h>
+#include <r_fs.h>
+#include "grubfs.h"
+#include <stdio.h>
+#include <string.h>
+
+
+static RIOBind *bio = NULL;
+static ut64 delta = 0;
+
+static void* empty (int sz) {
+	void *p = malloc (sz);
+	if (p) memset (p, '\0', sz);
+	return p;
+}
+
+static int read_foo (struct grub_disk *disk, grub_disk_addr_t sector, grub_size_t size, unsigned char *buf) {
+	if (disk != NULL) {
+		int ret;
+		RIOBind *iob = disk->data;
+		if (bio)
+			iob = bio;
+		//printf ("io %p\n", file->root->iob.io);
+		ret = iob->read_at (iob->io, delta+(512*sector), buf, 512); // XXX: 512 is hardcoded?
+		if (ret == -1)
+			return 1;
+		//printf ("DISK PTR = %p\n", disk->data);
+		//printf ("\nBUF: %x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
+	} else {
+		FILE *fd = fopen ("/tmp/test.fs.img", "rb"); // XXX for debug only
+		if (fd) {
+			size = 512;
+			fseek (fd, (512*sector), SEEK_SET);
+			fread (buf, 1, size, fd);
+			fclose (fd);
+		} else return 1;
+	}
+	return 0; // 0 is ok
+}
+
+GrubFS *grubfs_new (struct grub_fs *myfs, void *data) {
+	struct grub_file *file;
+	GrubFS *gfs = empty (sizeof (GrubFS));
+	// hacky mallocs :D
+	gfs->file = file = empty (sizeof (struct grub_file));
+	file->device = empty (sizeof (struct grub_device)+1024);
+	file->device->disk = empty (sizeof (struct grub_disk));
+	file->device->disk->dev = file->device;
+	file->device->disk->dev->read = read_foo; // grub_disk_dev
+	file->device->disk->data = data;
+	//file->device->disk->read_hook = read_foo; //read_hook;
+	file->fs = myfs;
+	return gfs;
+}
+
+void grubfs_free (GrubFS *gf) {
+	if (gf) {
+		if (gf->file && gf->file->device)
+			free (gf->file->device->disk);
+		//free (gf->file->device);
+		free (gf->file);
+		free (gf);
+	}
+}
+
+void grubfs_bind_io (RIOBind *iob, ut64 _delta) {
+	bio = iob;
+	delta = _delta;
+}

libr/fs/p/grub/include/grubfs.h

@@ -0,0 +1,18 @@
+#ifndef _INCLUDE_GRUBFS_H_
+#define _INCLUDE_GRUBFS_H_
+
+#include <r_io.h>
+#include <grub/file.h>
+#include <grub/disk.h>
+
+typedef struct grubfs {
+	struct grub_file *file;
+} GrubFS;
+
+GrubFS *grubfs_new (struct grub_fs *myfs, void *data);
+void grubfs_free (GrubFS *gf);
+void grubfs_bind_io (RIOBind *iob, ut64 _delta);
+
+extern struct grub_fs grub_ext2_fs;
+
+#endif

libr/fs/p/grub/kern/misc.c

@@ -982,9 +982,6 @@ void
 grub_abort (void)
 {
   grub_printf ("\nAborted.");
-  
-
-  grub_exit ();
 }
 
 #if ! defined (APPLE_CC) && !defined (GRUB_UTIL)

libr/fs/p/grub/main.c

@@ -17,7 +17,7 @@ void read_foo (struct grub_disk *disk, grub_disk_addr_t sector, grub_size_t size
 	//printf ("==> land: %p\n", buf);
 	size=512;
 	{
-		FILE *fd = fopen ("test.fs.img", "rb");
+		FILE *fd = fopen ("/tmp/test.fs.img", "rb");
 		fseek (fd, (512*sector), SEEK_SET);
 		fread (buf, 1, size, fd);
 		//printf ("\nBUF: %x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
@@ -30,7 +30,7 @@ void read_hook (grub_disk_addr_t sector, unsigned long offset, unsigned long len
 	//printf ("[hook]==> last %p\n", buf);
 	{
 		int size=length;
-		FILE *fd = fopen("test.fs.img", "rb");
+		FILE *fd = fopen("/tmp/test.fs.img", "rb");
 		fseek (fd, (512*sector)+offset, SEEK_SET);
 		fread (buf, 1, size, fd);
 		//write (1, buf, size);
@@ -41,25 +41,25 @@ void read_hook (grub_disk_addr_t sector, unsigned long offset, unsigned long len
 
 grub_file_t openimage(grub_fs_t fs, const char *str) {
 	grub_file_t file = malloc (1024);
-	file->device = malloc(1024);
+	file->device = malloc (1024);
 	memset (file->device, 0, 1024);
-	file->device->disk = malloc(1024);
-	file->device->disk->name = strdup ("disk0");
+	file->device->disk = malloc (1024);
+	memset (file->device->disk, 0, 1024);
+	//file->device->disk->name = "disk0"; //strdup ("disk0");
 	file->device->disk->dev = file->device;
 	//file->device->disk->dev->read = read_hook; //file->device;
 	file->device->disk->dev->read = read_foo; //file->device;
-	file->device->disk->read_hook = read_hook; //read_hook;
-	//file->device->read = read_hook;
+	//file->device->disk->read_hook = read_hook; //read_hook;
 	//file->device->read = read_hook;
+	//file->read_hook = read_hook;
 	//&device; // HACK to avoid segfault
 	file->fs = fs;
 #if 0
 	file->offset = 0;
 	file->size = 12190208;
 	file->data = malloc (file->size);
-#endif
 	{
-		FILE *fd = fopen("test.fs.img", "rb");
+		FILE *fd = fopen("/tmp/test.fs.img", "rb");
 		if (fd == NULL) {
 			printf ("Cannot open fs image\n");
 			return NULL;
@@ -67,7 +67,7 @@ grub_file_t openimage(grub_fs_t fs, const char *str) {
 		fread (file->data, file->size, 1, fd);
 		fclose (fd);
 	}
-	file->read_hook = read_hook;
+#endif
 	return file;
 }
 
@@ -86,7 +86,7 @@ int do_main() {
 	struct grub_disk disk;
 
 	e2 = &grub_ext2_fs;
-	file = openimage (e2, "test.fs.img");
+	file = openimage (e2, "/tmp/test.fs.img");
 	if (file == NULL) {
 		printf ("oops\n");
 		return 0;
@@ -112,8 +112,25 @@ int do_main() {
 	return 1;
 }
 
-main() {
-	printf ("Hello grubfs!\n");
+#include "grubfs.h"
+int foo_main() {
+	char buf[1024];
+	GrubFS *gfs = grubfs_new (&grub_ext2_fs, NULL);
+	gfs->file->fs->open (gfs->file, "/test");
+	gfs->file->fs->read (gfs->file, buf, gfs->file->size);
+printf ("fs = %d\n", gfs->file->size);
+	write (1, buf, gfs->file->size);
+	gfs->file->fs->close (gfs->file);
+	gfs->file->fs->dir (gfs->file->device, "/", dirhook);
+	grubfs_free (gfs);
+}
+
+int main(int argc, char **argv) {
+	if (argc>1) {
+		printf ("grubfs api\n");
+		return foo_main ();
+	}
+	printf ("grub internal api\n");
 	if (do_main()) {
 		printf ("\n** worked!\n");
 	} else {

libr/fs/test.rsc

@@ -0,0 +1,6 @@
+ml
+m ext2 /foo
+md /foo
+mg /foo/test
+m-/foo
+m

libr/include/r_fs.h

@@ -25,25 +25,31 @@ typedef struct r_fs_file_t {
 	void *ctx;
 	char type;
 	ut64 time;
-	struct r_fs_plugin_t *fs;
-	void *ptr;
+	struct r_fs_plugin_t *p;
+	struct r_fs_root_t *root;
+	void *ptr; // pointer to internal
 } RFSFile;
 
 typedef struct r_fs_root_t {
 	char *path;
 	ut64 delta;
-	struct r_fs_plugin_t *fs;
+	struct r_fs_plugin_t *p;
 	void *ptr;
+	RIOBind iob;
 } RFSRoot;
 
 typedef struct r_fs_plugin_t {
 	const char *name;
 	const char *desc;
-	RFSFile* (*open)(const char *path);
+	RFSFile* (*load)(RFSRoot *root, const char *path);
+	RFSFile* (*open)(RFSRoot *root, const char *path);
 	boolt (*read)(RFSFile *fs, ut64 addr, int len);
 	void (*close)(RFSFile *fs);
 	RList *(*dir)(RFSRoot *root, const char *path);
 	void (*init)();
+	void (*fini)();
+	void (*mount)(RFSRoot *root);
+	void (*umount)(RFSRoot *root);
 } RFSPlugin;
 
 #define R_FS_FILE_TYPE_DIRECTORY 'd'
@@ -55,16 +61,17 @@ R_API RFS *r_fs_new ();
 R_API void r_fs_free (RFS* fs);
 R_API void r_fs_add (RFS *fs, RFSPlugin *p);
 R_API void r_fs_del (RFS *fs, RFSPlugin *p);
-R_API RFSRoot *r_fs_mount (RFS* fs, const char *fstype, const char *path);
+R_API RFSRoot *r_fs_mount (RFS* fs, const char *fstype, const char *path, ut64 delta);
 R_API int r_fs_umount (RFS* fs, const char *path);
 R_API RFSRoot *r_fs_root (RFS *fs, const char *path);
 R_API RFSFile *r_fs_open (RFS* fs, const char *path);
 R_API void r_fs_close (RFS* fs, RFSFile *file);
 R_API int r_fs_read (RFS* fs, RFSFile *file, ut64 addr, int len);
+R_API RFSFile *r_fs_load(RFS* fs, const char *path);
 R_API RList *r_fs_dir(RFS* fs, const char *path);
 
 /* file.c */
-R_API RFSFile *r_fs_file_new (const char *path);
+R_API RFSFile *r_fs_file_new (RFSRoot *root, const char *path);
 R_API void r_fs_file_free (RFSFile *file);
 R_API RFSRoot *r_fs_root_new (const char *path, ut64 delta);
 R_API void r_fs_root_free (RFSRoot *root);

libr/io/io.c

@@ -130,6 +130,8 @@ R_API int r_io_set_fd(RIO *io, int fd) {
 
 R_API int r_io_read(struct r_io_t *io, ut8 *buf, int len) {
 	int ret;
+	if (io==NULL)
+		return -1;
 	/* check section permissions */
 	if (io->enforce_rwx && !(r_io_section_get_rwx (io, io->off) & R_IO_READ))
 		return -1;
@@ -269,7 +271,8 @@ R_API int r_io_write_at(struct r_io_t *io, ut64 addr, const ut8 *buf, int len) {
 R_API ut64 r_io_seek(struct r_io_t *io, ut64 offset, int whence) {
 	int posix_whence = SEEK_SET;
 	ut64 ret = -1;
-
+	if (io == NULL)
+		return offset; // XXX
 	switch(whence) {
 	case R_IO_SEEK_SET:
 		posix_whence = SEEK_SET;