Index: boot/arch/amd64/Makefile.inc
===================================================================
--- boot/arch/amd64/Makefile.inc	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ boot/arch/amd64/Makefile.inc	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -48,4 +48,5 @@
 	$(USPACEDIR)/srv/kbd/kbd \
 	$(USPACEDIR)/srv/console/console \
+	$(USPACEDIR)/srv/fs/devfs/devfs \
 	$(USPACEDIR)/srv/fs/tmpfs/tmpfs \
 	$(USPACEDIR)/srv/fs/fat/fat
Index: boot/arch/arm32/loader/Makefile
===================================================================
--- boot/arch/arm32/loader/Makefile	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ boot/arch/arm32/loader/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -90,4 +90,5 @@
 	$(USPACEDIR)/srv/kbd/kbd \
 	$(USPACEDIR)/srv/console/console \
+	$(USPACEDIR)/srv/fs/devfs/devfs \
 	$(USPACEDIR)/srv/fs/tmpfs/tmpfs \
 	$(USPACEDIR)/srv/fs/fat/fat
Index: boot/arch/ia32/Makefile.inc
===================================================================
--- boot/arch/ia32/Makefile.inc	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ boot/arch/ia32/Makefile.inc	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -48,4 +48,5 @@
 	$(USPACEDIR)/srv/kbd/kbd \
 	$(USPACEDIR)/srv/console/console \
+	$(USPACEDIR)/srv/fs/devfs/devfs \
 	$(USPACEDIR)/srv/fs/tmpfs/tmpfs \
 	$(USPACEDIR)/srv/fs/fat/fat
Index: boot/arch/ia64/loader/Makefile
===================================================================
--- boot/arch/ia64/loader/Makefile	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ boot/arch/ia64/loader/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -101,4 +101,5 @@
 	$(USPACEDIR)/srv/kbd/kbd \
 	$(USPACEDIR)/srv/console/console \
+	$(USPACEDIR)/srv/fs/devfs/devfs \
 	$(USPACEDIR)/srv/fs/tmpfs/tmpfs \
 	$(USPACEDIR)/srv/fs/fat/fat
Index: boot/arch/mips32/loader/Makefile
===================================================================
--- boot/arch/mips32/loader/Makefile	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ boot/arch/mips32/loader/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -102,4 +102,5 @@
 	$(USPACEDIR)/srv/kbd/kbd \
 	$(USPACEDIR)/srv/console/console \
+	$(USPACEDIR)/srv/fs/devfs/devfs \
 	$(USPACEDIR)/srv/fs/tmpfs/tmpfs \
 	$(USPACEDIR)/srv/fs/fat/fat \
Index: boot/arch/ppc32/loader/Makefile
===================================================================
--- boot/arch/ppc32/loader/Makefile	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ boot/arch/ppc32/loader/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -89,4 +89,5 @@
 	$(USPACEDIR)/srv/kbd/kbd \
 	$(USPACEDIR)/srv/console/console \
+	$(USPACEDIR)/srv/fs/devfs/devfs \
 	$(USPACEDIR)/srv/fs/tmpfs/tmpfs \
 	$(USPACEDIR)/srv/fs/fat/fat
Index: boot/arch/sparc64/loader/Makefile
===================================================================
--- boot/arch/sparc64/loader/Makefile	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ boot/arch/sparc64/loader/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -102,4 +102,5 @@
 	$(USPACEDIR)/srv/kbd/kbd \
 	$(USPACEDIR)/srv/console/console \
+	$(USPACEDIR)/srv/fs/devfs/devfs \
 	$(USPACEDIR)/srv/fs/tmpfs/tmpfs
 
Index: uspace/Makefile
===================================================================
--- uspace/Makefile	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ uspace/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -47,4 +47,5 @@
 	srv/fs/fat \
 	srv/fs/tmpfs \
+	srv/fs/devfs \
 	srv/vfs \
 	srv/devmap \
Index: uspace/app/init/init.c
===================================================================
--- uspace/app/init/init.c	(revision cb41a5e8d354c38c6d53f55fadf65c3d3dc83c6f)
+++ uspace/app/init/init.c	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -80,4 +80,30 @@
 }
 
+static bool mount_devfs(void)
+{
+	int rc = -1;
+	
+	while (rc < 0) {
+		rc = mount("devfs", "/dev", "null", "", IPC_FLAG_BLOCKING);
+		
+		switch (rc) {
+		case EOK:
+			printf(NAME ": Device filesystem mounted\n");
+			break;
+		case EBUSY:
+			printf(NAME ": Device filesystem already mounted\n");
+			break;
+		case ELIMIT:
+			printf(NAME ": Unable to mount device filesystem\n");
+			return false;
+		case ENOENT:
+			printf(NAME ": Unknown filesystem type (devfs)\n");
+			return false;
+		}
+	}
+	
+	return true;
+}
+
 static void spawn(char *fname)
 {
@@ -102,5 +128,11 @@
 	}
 	
-	// FIXME: spawn("/srv/pci");
+	spawn("/srv/devfs");
+	
+	if (!mount_devfs()) {
+		return(NAME ": Exiting\n");
+		return -2;
+	}
+	
 	spawn("/srv/fb");
 	spawn("/srv/kbd");
Index: uspace/srv/fs/devfs/Makefile
===================================================================
--- uspace/srv/fs/devfs/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
+++ uspace/srv/fs/devfs/Makefile	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -0,0 +1,82 @@
+#
+# Copyright (c) 2005 Martin Decky
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+## Setup toolchain
+#
+
+LIBC_PREFIX = ../../../lib/libc
+LIBFS_PREFIX = ../../../lib/libfs
+SOFTINT_PREFIX = ../../../lib/softint
+
+include $(LIBC_PREFIX)/Makefile.toolchain
+
+CFLAGS += -I $(LIBFS_PREFIX) 
+
+LIBS = \
+	$(LIBFS_PREFIX)/libfs.a \
+	$(LIBC_PREFIX)/libc.a
+
+## Sources
+#
+
+OUTPUT = devfs
+SOURCES = \
+	devfs.c \
+	devfs_ops.c
+
+
+OBJECTS := $(addsuffix .o,$(basename $(SOURCES)))
+
+.PHONY: all clean depend disasm
+
+all: $(OUTPUT) $(OUTPUT).disasm
+
+-include Makefile.depend
+
+clean:
+	-rm -f $(OUTPUT) $(OUTPUT).map $(OUTPUT).disasm Makefile.depend $(OBJECTS)
+
+depend:
+	$(CC) $(DEFS) $(CFLAGS) -M $(SOURCES) > Makefile.depend
+
+$(OUTPUT): $(OBJECTS) $(LIBS)
+	$(LD) -T $(LIBC_PREFIX)/arch/$(UARCH)/_link.ld $(OBJECTS) $(LIBS) $(LFLAGS) -o $@ -Map $(OUTPUT).map
+
+disasm: $(OUTPUT).disasm
+
+$(OUTPUT).disasm: $(OUTPUT)
+	$(OBJDUMP) -d $< > $@
+
+%.o: %.S
+	$(CC) $(DEFS) $(AFLAGS) $(CFLAGS) -D__ASM__ -c $< -o $@
+
+%.o: %.s
+	$(AS) $(AFLAGS) $< -o $@
+
+%.o: %.c
+	$(CC) $(DEFS) $(CFLAGS) -c $< -o $@
Index: uspace/srv/fs/devfs/devfs.c
===================================================================
--- uspace/srv/fs/devfs/devfs.c	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
+++ uspace/srv/fs/devfs/devfs.c	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2009 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup fs
+ * @{
+ */ 
+
+/**
+ * @file devfs.c
+ * @brief Devices file system.
+ *
+ * Every device registered to device mapper is represented as a file in this
+ * file system.
+ */
+
+#include <stdio.h>
+#include <ipc/ipc.h>
+#include <ipc/services.h>
+#include <async.h>
+#include <errno.h>
+#include <libfs.h>
+#include "devfs.h"
+#include "devfs_ops.h"
+
+#define NAME  "devfs"
+
+static vfs_info_t devfs_vfs_info = {
+	.name = "devfs",
+};
+
+fs_reg_t devfs_reg;
+
+static void devfs_connection(ipc_callid_t iid, ipc_call_t *icall)
+{
+	if (iid)
+		ipc_answer_0(iid, EOK);
+	
+	while (true) {
+		ipc_call_t call;
+		ipc_callid_t callid = async_get_call(&call);
+		
+		switch  (IPC_GET_METHOD(call)) {
+		case VFS_MOUNTED:
+			devfs_mounted(callid, &call);
+			break;
+		case VFS_MOUNT:
+			devfs_mount(callid, &call);
+			break;
+		case VFS_LOOKUP:
+			devfs_lookup(callid, &call);
+			break;
+		case VFS_READ:
+			devfs_read(callid, &call);
+			break;
+		case VFS_WRITE:
+			devfs_write(callid, &call);
+			break;
+		case VFS_TRUNCATE:
+			devfs_truncate(callid, &call);
+			break;
+		case VFS_DESTROY:
+			devfs_destroy(callid, &call);
+			break;
+		default:
+			ipc_answer_0(callid, ENOTSUP);
+			break;
+		}
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	printf(NAME ": HelenOS Device Filesystem\n");
+	
+	if (!devfs_init()) {
+		printf(NAME ": failed to initialize devfs\n");
+		return -1;
+	}
+	
+	int vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
+	if (vfs_phone < EOK) {
+		printf(NAME ": Unable to connect to VFS\n");
+		return -1;
+	}
+	
+	int rc = fs_register(vfs_phone, &devfs_reg, &devfs_vfs_info,
+	    devfs_connection);
+	if (rc != EOK) {
+		printf(NAME ": Failed to register file system (%d)\n", rc);
+		return rc;
+	}
+	
+	printf(NAME ": Accepting connections\n");
+	async_manager();
+	
+	/* Not reached */
+	return 0;
+}
+
+/** 
+ * @}
+ */
Index: uspace/srv/fs/devfs/devfs.h
===================================================================
--- uspace/srv/fs/devfs/devfs.h	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
+++ uspace/srv/fs/devfs/devfs.h	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2009 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup fs
+ * @{
+ */ 
+
+#ifndef DEVFS_DEVFS_H_
+#define DEVFS_DEVFS_H_
+
+#include <libfs.h>
+
+extern fs_reg_t devfs_reg;
+
+#endif
+
+/**
+ * @}
+ */
Index: uspace/srv/fs/devfs/devfs_ops.c
===================================================================
--- uspace/srv/fs/devfs/devfs_ops.c	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
+++ uspace/srv/fs/devfs/devfs_ops.c	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -0,0 +1,242 @@
+/*
+ * Copyright (c) 2009 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup fs
+ * @{
+ */
+
+/**
+ * @file devfs_ops.c
+ * @brief Implementation of VFS operations for the devfs file system server.
+ */
+
+#include <ipc/ipc.h>
+#include <bool.h>
+#include <errno.h>
+#include <malloc.h>
+#include <string.h>
+#include <libfs.h>
+#include "devfs.h"
+#include "devfs_ops.h"
+
+#define PLB_GET_CHAR(pos)  (devfs_reg.plb_ro[pos % PLB_SIZE])
+
+bool devfs_init(void)
+{
+	if (devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING) < 0)
+		return false;
+	
+	return true;
+}
+
+void devfs_mounted(ipc_callid_t rid, ipc_call_t *request)
+{
+	/* Accept the mount options */
+	ipc_callid_t callid;
+	size_t size;
+	if (!ipc_data_write_receive(&callid, &size)) {
+		ipc_answer_0(callid, EINVAL);
+		ipc_answer_0(rid, EINVAL);
+		return;
+	}
+	
+	char *opts = malloc(size + 1);
+	if (!opts) {
+		ipc_answer_0(callid, ENOMEM);
+		ipc_answer_0(rid, ENOMEM);
+		return;
+	}
+	
+	ipcarg_t retval = ipc_data_write_finalize(callid, opts, size);
+	if (retval != EOK) {
+		ipc_answer_0(rid, retval);
+		free(opts);
+		return;
+	}
+	
+	free(opts);
+	
+	ipc_answer_3(rid, EOK, 0, 0, 0);
+}
+
+void devfs_mount(ipc_callid_t rid, ipc_call_t *request)
+{
+	ipc_answer_0(rid, ENOTSUP);
+}
+
+void devfs_lookup(ipc_callid_t rid, ipc_call_t *request)
+{
+	ipcarg_t first = IPC_GET_ARG1(*request);
+	ipcarg_t last = IPC_GET_ARG2(*request);
+	dev_handle_t dev_handle = IPC_GET_ARG3(*request);
+	ipcarg_t lflag = IPC_GET_ARG4(*request);
+	fs_index_t index = IPC_GET_ARG5(*request);
+	
+	/* Hierarchy is flat, no altroot is supported */
+	if (index != 0) {
+		ipc_answer_0(rid, ENOENT);
+		return;
+	}
+	
+	/* This is a read-only filesystem */
+	if ((lflag & L_CREATE) || (lflag & L_LINK) || (lflag & L_UNLINK)) {
+		ipc_answer_0(rid, ENOTSUP);
+		return;
+	}
+	
+	/* Eat slash */
+	if (PLB_GET_CHAR(first) == '/') {
+		first++;
+		first %= PLB_SIZE;
+	}
+	
+	if (first >= last) {
+		/* Root entry */
+		if (lflag & L_DIRECTORY)
+			ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, 0, 0, 0);
+		else
+			ipc_answer_0(rid, ENOENT);
+	} else {
+		if (lflag & L_FILE) {
+			count_t len;
+			if (last >= first)
+				len = last - first + 1;
+			else
+				len = first + PLB_SIZE - last + 1;
+			
+			char *name = (char *) malloc(len + 1);
+			if (name == NULL) {
+				ipc_answer_0(rid, ENOMEM);
+				return;
+			}
+			
+			count_t i;
+			for (i = 0; i < len; i++)
+				name[i] = PLB_GET_CHAR(first + i);
+			
+			name[len] = 0;
+			
+			dev_handle_t handle;
+			if (devmap_device_get_handle(name, &handle, 0) != EOK) {
+				free(name);
+				ipc_answer_0(rid, ENOENT);
+				return;
+			}
+			
+			free(name);
+			
+			ipc_answer_5(rid, EOK, devfs_reg.fs_handle, dev_handle, handle, 0, 1);
+		} else
+			ipc_answer_0(rid, ENOENT);
+	}
+}
+
+void devfs_read(ipc_callid_t rid, ipc_call_t *request)
+{
+	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
+	off_t pos = (off_t) IPC_GET_ARG3(*request);
+	
+	if (index != 0) {
+		ipc_answer_1(rid, ENOENT, 0);
+		return;
+	}
+	
+	/*
+	 * Receive the read request.
+	 */
+	ipc_callid_t callid;
+	size_t size;
+	if (!ipc_data_read_receive(&callid, &size)) {
+		ipc_answer_0(callid, EINVAL);
+		ipc_answer_0(rid, EINVAL);
+		return;
+	}
+	
+	size_t bytes = 0;
+	if (index != 0) {
+		(void) ipc_data_read_finalize(callid, NULL, bytes);
+	} else {
+		count_t count = devmap_device_get_count();
+		dev_desc_t *desc = malloc(count * sizeof(dev_desc_t));
+		if (desc == NULL) {
+			ipc_answer_0(callid, ENOENT);
+			ipc_answer_1(rid, ENOENT, 0);
+			return;
+		}
+		
+		count_t max = devmap_device_get_devices(count, desc);
+		
+		if (pos < max) {
+			ipc_data_read_finalize(callid, desc[pos].name, str_size(desc[pos].name) + 1);
+		} else {
+			ipc_answer_0(callid, ENOENT);
+			ipc_answer_1(rid, ENOENT, 0);
+			return;
+		}
+		
+		free(desc);
+		bytes = 1;
+	}
+	
+	ipc_answer_1(rid, EOK, bytes);
+}
+
+void devfs_write(ipc_callid_t rid, ipc_call_t *request)
+{
+	fs_index_t index = (fs_index_t) IPC_GET_ARG2(*request);
+	off_t pos = (off_t) IPC_GET_ARG3(*request);
+	
+	/*
+	 * Receive the write request.
+	 */
+	ipc_callid_t callid;
+	size_t size;
+	if (!ipc_data_write_receive(&callid, &size)) {
+		ipc_answer_0(callid, EINVAL);
+		ipc_answer_0(rid, EINVAL);
+		return;
+	}
+	
+	// TODO
+	ipc_answer_0(callid, ENOENT);
+	ipc_answer_2(rid, ENOENT, 0, 0);
+}
+
+void devfs_truncate(ipc_callid_t rid, ipc_call_t *request)
+{
+	ipc_answer_0(rid, ENOTSUP);
+}
+
+void devfs_destroy(ipc_callid_t rid, ipc_call_t *request)
+{
+	ipc_answer_0(rid, ENOTSUP);
+}
+
+/**
+ * @}
+ */ 
Index: uspace/srv/fs/devfs/devfs_ops.h
===================================================================
--- uspace/srv/fs/devfs/devfs_ops.h	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
+++ uspace/srv/fs/devfs/devfs_ops.h	(revision a095d202b1caf823b2b66c86fe55c5a3b8bdd306)
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2009 Martin Decky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup fs
+ * @{
+ */ 
+
+#ifndef DEVFS_DEVFS_OPS_H_
+#define DEVFS_DEVFS_OPS_H_
+
+#include <ipc/ipc.h>
+#include <bool.h>
+
+extern bool devfs_init(void);
+
+extern void devfs_mounted(ipc_callid_t, ipc_call_t *);
+extern void devfs_mount(ipc_callid_t, ipc_call_t *);
+extern void devfs_lookup(ipc_callid_t, ipc_call_t *);
+extern void devfs_read(ipc_callid_t, ipc_call_t *);
+extern void devfs_write(ipc_callid_t, ipc_call_t *);
+extern void devfs_truncate(ipc_callid_t, ipc_call_t *);
+extern void devfs_destroy(ipc_callid_t, ipc_call_t *);
+
+#endif
+
+/**
+ * @}
+ */