man2/unimplemented.2

   1 .\" Copyright 1995 Michael Chastain (mec@shell.portal.com), 15 April 1995.
   2 .\"
   3 .\" SPDX-License-Identifier: GPL-2.0-or-later
   4 .\"
   5 .\" Updated, aeb, 980612
   6 .\"
   7 .TH UNIMPLEMENTED 2 (date) "Linux man-pages (unreleased)"
   8 .SH NAME
   9 afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream,
  10 lock, madvise1, mpx, prof, profil, putmsg, putpmsg, security,
  11 stty, tuxcall, ulimit, vserver \- unimplemented system calls
  12 .SH SYNOPSIS
  13 .nf
  14 Unimplemented system calls.
  15 .fi
  16 .SH DESCRIPTION
  17 These system calls are not implemented in the Linux kernel.
  18 .SH RETURN VALUE
  19 These system calls always return \-1 and set
  20 .I errno
  21 to
  22 .BR ENOSYS .
  23 .SH NOTES
  24 Note that
  25 .BR ftime (3),
  26 .BR profil (3),
  27 and
  28 .BR ulimit (3)
  29 are implemented as library functions.
  30 .P
  31 Some system calls, like
  32 .BR alloc_hugepages (2),
  33 .BR free_hugepages (2),
  34 .BR ioperm (2),
  35 .BR iopl (2),
  36 and
  37 .BR vm86 (2)
  38 exist only on certain architectures.
  39 .P
  40 Some system calls, like
  41 .BR ipc (2),
  42 .BR create_module (2),
  43 .BR init_module (2),
  44 and
  45 .BR delete_module (2)
  46 exist only when the Linux kernel was built with support for them.
  47 .SH SEE ALSO
  48 .BR syscalls (2)