Other UNIX® system interfaces, not in POSIX.1-2024, or deprecated:
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## Other UNIX® system interfaces, not in POSIX.1-2024, or deprecated:

        _longjmp			(SUSv4)
        _setjmp			(SUSv4)
        _tolower			(SUSv4)
        _toupper			(SUSv4)
        acl_add_perm		(POSIX.1e draft)
        acl_calc_mask		(POSIX.1e draft)
        acl_check			(libacl)
        acl_clear_perms		(POSIX.1e draft)
        acl_cmp			(libacl)
        acl_copy_entry		(POSIX.1e draft)
        acl_copy_ext		(POSIX.1e draft)
        acl_copy_int		(POSIX.1e draft)
        acl_create_entry		(POSIX.1e draft)
        acl_delete_def_file		(POSIX.1e draft)
        acl_delete_entry		(POSIX.1e draft)
        acl_delete_perm		(POSIX.1e draft)
        acl_dup			(POSIX.1e draft)
        acl_entries			(libacl)
        acl_equiv_mode		(libacl)
        acl_error			(POSIX.1e draft)
        acl_extended_fd		(libacl)
        acl_extended_file		(libacl)
        acl_extended_file_nofollow	(libacl)
        acl_free			(POSIX.1e draft)
        acl_from_mode		(libacl)
        acl_from_text		(POSIX.1e draft)
        acl_get_entry		(POSIX.1e draft)
        acl_get_fd			(POSIX.1e draft)
        acl_get_file		(POSIX.1e draft)
        acl_get_perm		(libacl)
        acl_get_permset		(POSIX.1e draft)
        acl_get_qualifier		(POSIX.1e draft)
        acl_get_tag_type		(POSIX.1e draft)
        acl_init			(POSIX.1e draft)
        acl_set_fd			(POSIX.1e draft)
        acl_set_file		(POSIX.1e draft)
        acl_set_permset		(POSIX.1e draft)
        acl_set_qualifier		(POSIX.1e draft)
        acl_set_tag_type		(POSIX.1e draft)
        acl_size			(POSIX.1e draft)
        acl_to_any_text		(libacl)
        acl_to_text			(POSIX.1e draft)
        acl_valid			(POSIX.1e draft)
        atoff			(AIX)
        bcmp			(POSIX.1-2001, SUSv3)
        bcopy			(SUSv3)
        bzero			(SUSv3)
        chroot			(SUSv2 - see the section called “Implementation Notes”)
        clock_setres		(QNX, VxWorks - see the section called “Implementation Notes”)
        cuserid			(POSIX.1-1988, SUSv2)
        ecvt			(SUSv3)
        endutent			(XPG2)
        fcvt			(SUSv3)
        ftime			(SUSv3)
        ftw				(SUSv4)
        gcvt			(SUSv3)
        getcontext			(SUSv3)
        gethostbyaddr		(SUSv3)
        gethostbyname		(SUSv3)
        gethostbyname2		(first defined in BIND 4.9.4)
        getitimer			(SUSv4 - see the section called “Implementation Notes”)
        getpass			(SUSv2)
        gets			(SUSv4)
        gettimeofday		(SUSv4)
        getutent			(XPG2)
        getutid			(XPG2)
        getutline			(XPG2)
        getw			(SVID)
        getwd			(SUSv3)
        h_errno			(SUSv3)
        index			(SUSv3)
        ioctl			(SUSv4)
        isascii			(SUSv4)
        makecontext			(SUSv3)
        mallinfo			(SVID)
        mallopt			(SVID)
        mktemp			(SUSv3)
        on_exit			(SunOS)
        pthread_attr_getstackaddr	(SUSv3)
        pthread_attr_setstackaddr	(SUSv3)
        pthread_continue		(XPG2)
        pthread_getconcurrency	(SUSv4)
        pthread_getsequence_np	(Tru64)
        pthread_setconcurrency	(SUSv4)
        pthread_suspend		(XPG2)
        pthread_yield		(POSIX.1c drafts)
        pututline			(XPG2)
        putw			(SVID)
        rand_r			(SUSv4)
        rindex			(SUSv3)
        scalb			(SUSv3)
        setcontext			(SUSv3)
        setitimer			(SUSv4 - see the section called “Implementation Notes”)
        setpgrp			(SUSv4)
        setutent			(XPG2)
        sighold			(SUSv4)
        sigignore			(SUSv4)
        siginterrupt		(SUSv4)
        sigpause			(SUSv4 - see the section called “Implementation Notes”)
        sigrelse			(SUSv4)
        sigset			(SUSv4)
        stime			(SVID)
        swapcontext			(SUSv3)
        sys_errlist			(BSD)
        sys_nerr			(BSD)
        sys_siglist			(BSD)
        tempnam			(SUSv4)
        toascii			(SUSv4)
        ttyslot			(SUSv2)
        ualarm			(SUSv3)
        usleep			(SUSv3)
        utime			(SUSv4)
        utmpname			(XPG2)
        vfork			(SUSv3 - see the section called “Implementation Notes”)

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