HelenOS sources

MFS_MAGIC_V1      146 uspace/app/mkmfs/mkmfs.c 			sb.magic = MFS_MAGIC_V1;
MFS_MAGIC_V1     1108 uspace/srv/fs/mfs/mfs_ops.c 	if (magic == MFS_MAGIC_V1 || magic == MFS_MAGIC_V1R) {
MFS_MAGIC_V1     1109 uspace/srv/fs/mfs/mfs_ops.c 		*native = magic == MFS_MAGIC_V1;
HelenOS homepage, sources at GitHub