resource/sys/resource.h

   1 /* Copyright (C) 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _SYS_RESOURCE_H
  20 #define _SYS_RESOURCE_H 1
  21
  22 #include <features.h>
  23
  24 __BEGIN_DECLS
  25
  26 /* Get the system-dependent definitions of structures and bit values.  */
  27 #include <bits/resource.h>
  28
  29 /* Put the soft and hard limits for RESOURCE in *RLIMITS.
  30    Returns 0 if successful, -1 if not (and sets errno).  */
  31 extern int __getrlimit __P ((enum __rlimit_resource __resource,
  32                              struct rlimit *__rlimits));
  33 #ifndef __USE_FILE_OFFSET64
  34 extern int getrlimit __P ((enum __rlimit_resource __resource,
  35                            struct rlimit *__rlimits));
  36 #else
  37 extern int getrlimit __P ((enum __rlimit_resource __resource,
  38                            struct rlimit *__rlimits)) __asm__ ("getrlimit64");
  39 #endif
  40 #ifdef __USE_LARGEFILE64
  41 extern int getrlimit64 __P ((enum __rlimit_resource __resource,
  42                              struct rlimit64 *__rlimits));
  43 #endif
  44
  45 /* Set the soft and hard limits for RESOURCE to *RLIMITS.
  46    Only the super-user can increase hard limits.
  47    Return 0 if successful, -1 if not (and sets errno).  */
  48 #ifndef __USE_FILE_OFFSET64
  49 extern int setrlimit __P ((enum __rlimit_resource __resource,
  50                            struct rlimit *__rlimits));
  51 #else
  52 extern int setrlimit __P ((enum __rlimit_resource __resource,
  53                            struct rlimit *__rlimits)) __asm__ ("setrlimit64");
  54 #endif
  55 #ifdef __USE_LARGEFILE64
  56 extern int setrlimit64 __P ((enum __rlimit_resource __resource,
  57                              struct rlimit64 *__rlimits));
  58 #endif
  59
  60 /* Return resource usage information on process indicated by WHO
  61    and put it in *USAGE.  Returns 0 for success, -1 for failure.  */
  62 extern int __getrusage __P ((enum __rusage_who __who, struct rusage *__usage));
  63 extern int getrusage __P ((enum __rusage_who __who, struct rusage *__usage));
  64
  65 /* Function depends on CMD:
  66    1 = Return the limit on the size of a file, in units of 512 bytes.
  67    2 = Set the limit on the size of a file to NEWLIMIT.  Only the
  68        super-user can increase the limit.
  69    3 = Return the maximum possible address of the data segment.
  70    4 = Return the maximum number of files that the calling process can open.
  71    Returns -1 on errors.  */
  72 extern long int __ulimit __P ((int __cmd, long int __newlimit));
  73 extern long int ulimit __P ((int __cmd, long int __newlimit));
  74
  75 /* Return the highest priority of any process specified by WHICH and WHO
  76    (see above); if WHO is zero, the current process, process group, or user
  77    (as specified by WHO) is used.  A lower priority number means higher
  78    priority.  Priorities range from PRIO_MIN to PRIO_MAX (above).  */
  79 extern int getpriority __P ((enum __priority_which __which, int __who));
  80
  81 /* Set the priority of all processes specified by WHICH and WHO (see above)
  82    to PRIO.  Returns 0 on success, -1 on errors.  */
  83 extern int setpriority __P ((enum __priority_which __which, int __who,
  84                              int __prio));
  85
  86
  87 __END_DECLS
  88
  89 #endif  /* sys/resource.h  */