root@CW8:/var/lib/nfs# tree -dgu
.
|-- [nobody   root    ]  sm
|-- [nobody   root    ]  sm.bak
`-- [root     root    ]  v4recovery

/*
 * Some distributions place statd's files in a subdirectory
 */
#define NSM_PATH_EXTENSION
/* #define NSM_PATH_EXTENSION   "/statd" */

#define NSM_DEFAULT_STATEDIR        NFS_STATEDIR NSM_PATH_EXTENSION

static char nsm_base_dirname[PATH_MAX] = NSM_DEFAULT_STATEDIR;

#define NSM_MONITOR_DIR "sm"
#define NSM_NOTIFY_DIR  "sm.bak"
#define NSM_STATE_FILE  "state"

/**
 * nsm_drop_privileges - drop root privileges
 * @pidfd: file descriptor of a pid file
 *
 * Returns true if successful, or false if some error occurred.
 *
 * Set our effective UID and GID to that of our on-disk database.
 */
_Bool
nsm_drop_privileges(const int pidfd)
{
    struct stat st;

    (void)umask(S_IRWXO);

    /*
     * XXX: If we can't stat dirname, or if dirname is owned by
     *      root, we should use "statduser" instead, which is set up
     *      by configure.ac.  Nothing in nfs-utils seems to use
     *      "statduser," though.
     */
    if (lstat(nsm_base_dirname, &st) == -1) {
        xlog(L_ERROR, "Failed to stat %s: %m", nsm_base_dirname);
        return false;
    }

    if (st.st_uid == 0) {
        xlog_warn("Running as root.  "
            "chown %s to choose different user", nsm_base_dirname);
        return true;