sysdeps/unix/sysv/linux/bits/local_lim.h

   1 /* Minimum guaranteed maximum values for system limits.  Linux version.
   2    Copyright (C) 1993-1998,2000,2003,2004,2008 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /* The kernel header pollutes the namespace with the NR_OPEN symbol
  21    and defines LINK_MAX although filesystems have different maxima.  A
  22    similar thing is true for OPEN_MAX: the limit can be changed at
  23    runtime and therefore the macro must not be defined.  Remove this
  24    after including the header if necessary.  */
  25 #ifndef NR_OPEN
  26 # define __undef_NR_OPEN
  27 #endif
  28 #ifndef LINK_MAX
  29 # define __undef_LINK_MAX
  30 #endif
  31 #ifndef OPEN_MAX
  32 # define __undef_OPEN_MAX
  33 #endif
  34 #ifndef ARG_MAX
  35 # define __undef_ARG_MAX
  36 #endif
  37
  38 /* The kernel sources contain a file with all the needed information.  */
  39 #include <linux/limits.h>
  40
  41 /* Have to remove NR_OPEN?  */
  42 #ifdef __undef_NR_OPEN
  43 # undef NR_OPEN
  44 # undef __undef_NR_OPEN
  45 #endif
  46 /* Have to remove LINK_MAX?  */
  47 #ifdef __undef_LINK_MAX
  48 # undef LINK_MAX
  49 # undef __undef_LINK_MAX
  50 #endif
  51 /* Have to remove OPEN_MAX?  */
  52 #ifdef __undef_OPEN_MAX
  53 # undef OPEN_MAX
  54 # undef __undef_OPEN_MAX
  55 #endif
  56 /* Have to remove ARG_MAX?  */
  57 #ifdef __undef_ARG_MAX
  58 # undef ARG_MAX
  59 # undef __undef_ARG_MAX
  60 #endif
  61
  62 /* Maximum amount by which a process can descrease its asynchronous I/O
  63    priority level.  */
  64 #define AIO_PRIO_DELTA_MAX      20
  65
  66 /* Maximum tty name length.  */
  67 #define TTY_NAME_MAX            32
  68
  69 /* Maximum login name length.  This is arbitrary.  */
  70 #define LOGIN_NAME_MAX          256
  71
  72 /* Maximum host name length.  */
  73 #define HOST_NAME_MAX           64
  74
  75 /* Maximum message queue priority level.  */
  76 #define MQ_PRIO_MAX             32768