Other UNIX system interfaces, deprecated or not in POSIX.1-2008:

    bcmp			(POSIX.1-2001, SUSv3)
    bcopy			(SUSv3)
    bzero			(SUSv3)
    chroot			(SUSv2) (see chapter "Implementation Notes")
    clock_setres		(QNX, VxWorks) (see chapter "Implementation Notes")
    cuserid			(POSIX.1-1988, SUSv2)
    ecvt			(SUSv3)
    endutent			(XPG2)
    fcvt			(SUSv3)
    ftime			(SUSv3)
    gcvt			(SUSv3)
    gethostbyaddr		(SUSv3)
    gethostbyname		(SUSv3)
    gethostbyname2		(first defined in BIND 4.9.4)
    getpass			(SUSv2)
    getutent			(XPG2)
    getutid			(XPG2)
    getutline			(XPG2)
    getw			(SVID)
    getwd			(SUSv3)
    h_errno			(SUSv3)
    index			(SUSv3)
    mallinfo			(SVID)
    mallopt			(SVID)
    mktemp			(SUSv3)
    on_exit			(SunOS)
    pthread_attr_getstackaddr	(SUSv3)
    pthread_attr_setstackaddr	(SUSv3)
    pthread_continue		(XPG2)
    pthread_getsequence_np	(Tru64)
    pthread_suspend		(XPG2)
    pthread_yield		(POSIX.1c drafts)
    pututline			(XPG2)
    putw			(SVID)
    rindex			(SUSv3)
    scalb			(SUSv3)
    setutent			(XPG2)
    stime			(SVID)
    sys_errlist			(BSD)
    sys_nerr			(BSD)
    sys_siglist			(BSD)
    ttyslot			(SUSv2)
    ualarm			(SUSv3)
    usleep			(SUSv3)
    utmpname			(XPG2)
    vfork			(SUSv3) (see chapter "Implementation Notes")