Added "relabel" command to rename volumes.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16888 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/add-ons/kernel/file_systems/fs_shell/fsh.cpp

@@ -1669,6 +1669,31 @@ do_sync(int argc, char **argv)
 }
 
 
+static int
+do_relabel(int argc, char **argv)
+{
+	if (argc < 2) {
+		printf("usage: relabel <volume name>\n");
+		return FS_EINVAL;
+	}
+
+	struct my_stat st;
+	status_t error = sys_rstat(true, -1, "/myfs", &st, true);
+	if (error == FS_OK) {
+		fs_info info;
+		strncpy(info.volume_name, argv[1], sizeof(info.volume_name));
+		info.volume_name[sizeof(info.volume_name) - 1] = '\0';
+
+		error = sys_write_fs_info(true, st.dev, &info, WFSSTAT_NAME);
+	}
+
+	if (error != FS_OK)
+		printf("Could not create index: %s\n", fs_strerror(error));
+
+	return error;
+}
+
+
 static int
 do_mkindex(int argc, char **argv)
 {
@@ -2038,6 +2063,7 @@ static cmd_entry builtin_commands[] =
     { "seek",    do_seek, "seek to the position specified" },
     { "mv",      do_rename, "rename a file or directory" },
     { "sync",    do_sync, "call sync" },
+    { "relabel", do_relabel, "rename the volume" },
     { "wrattr",  do_write_attr, "write attribute \"name\" to the current file (N bytes [256])." },
     { "rdattr",  do_read_attr, "read attribute \"name\" from the current file (N bytes [256])." },
     { "rmattr",  do_remove_attr, "remove attribute \"name\" from the current file." },

src/tests/add-ons/kernel/file_systems/fs_shell/kernel.c

@@ -2084,6 +2084,35 @@ error1:
 }
 
 
+int
+sys_write_fs_info(int kernel, dev_t device, struct fs_info *info, int mask)
+{
+	int status = FS_EINVAL;
+	fsystem	*fs = NULL;
+	vnode *root = NULL;
+	nspace *ns;
+
+	LOCK(vnlock);
+	ns = nsidtons(device);
+	if (ns != NULL) {
+		fs = ns->fs;
+		if (fs->ops.wfsstat != NULL) {
+			status = FS_OK;
+			root = ns->root;
+			root->rcnt++;
+		}
+	}
+	UNLOCK(vnlock);
+
+	if (status == FS_OK) {
+		status = (*fs->ops.wfsstat)(ns->data, info, mask);
+		dec_vnode(root, FALSE);
+	}
+
+	return status;
+}
+
+
 int
 sys_mkindex(int kernel, dev_t device, const char *index, int type, int flags)
 {

src/tests/add-ons/kernel/file_systems/fs_shell/kprotos.h

@@ -31,6 +31,7 @@ void *sys_mount(int kernel, const char *filesystem, int fd,
                 const char *where, const char *device, ulong flags,
                 void *parms, size_t len);
 int sys_unmount(int kernel, int fd, const char *where);
+int sys_write_fs_info(int kernel, dev_t device, struct fs_info *info, int mask);
 int sys_rstat(int kernel, int fd, const char *path, struct my_stat *st,
               int eatlink);
 int sys_wstat(int kernel, int fd, const char *path, struct my_stat *st,