NFS_MAGIC
spcl.c_magic = NFS_MAGIC;
if (buf->c_magic != NFS_MAGIC) {
if (swabl(buf->c_magic) != NFS_MAGIC)
buf->c_magic = NFS_MAGIC;
if (header->c_magic != NFS_MAGIC) {
endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC;
if (spcl.c_magic != NFS_MAGIC)