Index: uspace/lib/c/generic/adt/char_map.c
===================================================================
--- uspace/lib/c/generic/adt/char_map.c	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/generic/adt/char_map.c	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -90,8 +90,8 @@
 	}
 
-	map->items[map->next]->c = * identifier;
-	++ identifier;
-	++ map->next;
-	if ((length > 1) || ((length == 0) && (*identifier))) {
+	map->items[map->next]->c = *identifier;
+	identifier++;
+	map->next++;
+	if ((length > 1) || ((length == 0) && *identifier)) {
 		map->items[map->next - 1]->value = CHAR_MAP_NULL;
 		return char_map_add_item(map->items[map->next - 1], identifier,
@@ -142,14 +142,13 @@
     const int value)
 {
-	if (char_map_is_valid(map) && (identifier) &&
-	    ((length) || (*identifier))) {
+	if (char_map_is_valid(map) && identifier && (length || *identifier)) {
 		int index;
 
-		for (index = 0; index < map->next; ++ index) {
+		for (index = 0; index < map->next; index++) {
 			if (map->items[index]->c != *identifier)
 				continue;
 				
-			++ identifier;
-			if((length > 1) || ((length == 0) && (*identifier))) {
+			identifier++;
+			if((length > 1) || ((length == 0) && *identifier)) {
 				return char_map_add(map->items[index],
 				    identifier, length ? length - 1 : 0, value);
@@ -178,5 +177,5 @@
 
 		map->magic = 0;
-		for (index = 0; index < map->next; ++index)
+		for (index = 0; index < map->next; index++)
 			char_map_destroy(map->items[index]);
 
@@ -207,10 +206,10 @@
 		return NULL;
 
-	if (length || (*identifier)) {
+	if (length || *identifier) {
 		int index;
 
-		for (index = 0; index < map->next; ++index) {
+		for (index = 0; index < map->next; index++) {
 			if (map->items[index]->c == *identifier) {
-				++identifier;
+				identifier++;
 				if (length == 1)
 					return map->items[index];
Index: uspace/lib/c/generic/devman.c
===================================================================
--- uspace/lib/c/generic/devman.c	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/generic/devman.c	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -116,7 +116,8 @@
 {
 	ipc_call_t answer;
-	async_send_1(phone, DEVMAN_ADD_MATCH_ID, match_id->score, &answer);
+	aid_t req = async_send_1(phone, DEVMAN_ADD_MATCH_ID, match_id->score, &answer);
 	int retval = async_data_write_start(phone, match_id->id, str_size(match_id->id));
-	return retval;	
+	async_wait_for(req, NULL);
+	return retval;
 }
 
Index: uspace/lib/c/include/adt/generic_field.h
===================================================================
--- uspace/lib/c/include/adt/generic_field.h	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/include/adt/generic_field.h	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -91,5 +91,5 @@
 			} \
 			field->items[field->next] = value; \
-			++field->next; \
+			field->next++; \
 			field->items[field->next] = NULL; \
 			return field->next - 1; \
@@ -108,5 +108,5 @@
 			int index; \
 			field->magic = 0; \
-			for (index = 0; index < field->next; ++ index) { \
+			for (index = 0; index < field->next; index++) { \
 				if (field->items[index]) \
 					free(field->items[index]); \
Index: uspace/lib/c/include/errno.h
===================================================================
--- uspace/lib/c/include/errno.h	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/include/errno.h	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -83,8 +83,6 @@
 #define ENOTCONN	(-10057)
 
-/** The requested operation was not performed.
- *  Try again later.
- */
-#define TRY_AGAIN	(-11002)
+/** The requested operation was not performed. Try again later. */
+#define EAGAIN		(-11002)
 
 /** No data.
Index: uspace/lib/c/include/ipc/vfs.h
===================================================================
--- uspace/lib/c/include/ipc/vfs.h	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/include/ipc/vfs.h	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -36,6 +36,7 @@
 #define LIBC_IPC_VFS_H_
 
+#include <ipc/ipc.h>
 #include <sys/types.h>
-#include <ipc/ipc.h>
+#include <bool.h>
 
 #define FS_NAME_MAXLEN  20
@@ -55,4 +56,6 @@
 	/** Unique identifier of the fs. */
 	char name[FS_NAME_MAXLEN + 1];
+	bool concurrent_read_write;
+	bool write_retains_size;
 } vfs_info_t;