A file can be created.

Now up to sys_write() in pager, which needs to be filled in.

tasks/fs0/main.c

@@ -94,7 +94,8 @@ void handle_fs_requests(void)
 		break;
 	default:
 		printf("%s: Unrecognised ipc tag (%d) "
-		       "received. Ignoring.\n", __TASKNAME__, mr[MR_TAG]);
+		       "received from tid: %d. Ignoring.\n", __TASKNAME__,
+		       mr[MR_TAG], sender);
 	}
 }
 

tasks/fs0/src/memfs/vnode.c

@@ -245,7 +245,7 @@ struct vnode *memfs_vnode_mknod(struct vnode *v, const char *dirname,
 		return newv;
 
 	/* Initialise the vnode */
-	vfs_set_type(newv, S_IFDIR);
+	vfs_set_type(newv, mode);
 
 	/* Get the next directory entry available on the parent vnode */
 	if (v->dirbuf.npages * PAGE_SIZE <= v->size)

tasks/fs0/src/syscalls.c

@@ -113,8 +113,10 @@ int sys_open(l4id_t sender, const char *pathname, int flags, unsigned int mode)
 		return 0;
 	}
 
-	/* Creating new node, file or directory */
+	/* Creating new file */
 	if (flags & O_CREAT) {
+		/* Make sure mode identifies a file */
+		mode |= S_IFREG;
 		if (IS_ERR(v = vfs_create(task, pdata, mode))) {
 			retval = (int)v;
 			goto out;
@@ -182,6 +184,9 @@ int sys_mkdir(l4id_t sender, const char *pathname, unsigned int mode)
 		return 0;
 	}
 
+	/* Make sure we create a directory */
+	mode |= S_IFDIR;
+
 	/* Create the directory or fail */
 	if (IS_ERR(v = vfs_create(task, pdata, mode)))
 		l4_ipc_return((int)v);

tasks/libposix/write.c

@@ -20,7 +20,7 @@ static inline int l4_write(int fd, const void *buf, size_t count)
 	write_mr(L4SYS_ARG2, count);
 
 	/* Call pager with write() request. Check ipc error. */
-	if ((wrcnt = l4_sendrecv(VFS_TID, VFS_TID, L4_IPC_TAG_WRITE)) < 0) {
+	if ((wrcnt = l4_sendrecv(PAGER_TID, PAGER_TID, L4_IPC_TAG_WRITE)) < 0) {
 		printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, wrcnt);
 		return wrcnt;
 	}

tasks/test0/src/fileio.c

@@ -21,6 +21,7 @@ int fileio(void)
 		perror("OPEN");
 		return -1;
 	}
+	printf("Created newfile.txt\n");
 
 	if ((int)(cnt = write(fd, str, strlen(str))) < 0) {
 		perror("WRITE");