1/* Copyright (C) 1992-2025 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 Lesser General Public
  6   License as published by the Free Software Foundation; either
  7   version 2.1 of the 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   Lesser General Public License for more details.
 13
 14   You should have received a copy of the GNU Lesser General Public
 15   License along with the GNU C Library; if not, see
 16   <https://www.gnu.org/licenses/>.  */
 17
 18#ifndef	_SYS_RESOURCE_H
 19#define	_SYS_RESOURCE_H	1
 20
 21#include <features.h>
 22
 23/* Get the system-dependent definitions of structures and bit values.  */
 24#include <bits/resource.h>
 25
 26#ifndef __id_t_defined
 27typedef __id_t id_t;
 28# define __id_t_defined
 29#endif
 30
 31__BEGIN_DECLS
 32
 33/* The X/Open standard defines that all the functions below must use
 34   `int' as the type for the first argument.  When we are compiling with
 35   GNU extensions we change this slightly to provide better error
 36   checking.  */
 37#if defined __USE_GNU && !defined __cplusplus
 38typedef enum __rlimit_resource __rlimit_resource_t;
 39typedef enum __rusage_who __rusage_who_t;
 40typedef enum __priority_which __priority_which_t;
 41#else
 42typedef int __rlimit_resource_t;
 43typedef int __rusage_who_t;
 44typedef int __priority_which_t;
 45#endif
 46
 47/* Put the soft and hard limits for RESOURCE in *RLIMITS.
 48   Returns 0 if successful, -1 if not (and sets errno).  */
 49#ifndef __USE_FILE_OFFSET64
 50extern int getrlimit (__rlimit_resource_t __resource,
 51		      struct rlimit *__rlimits) __THROW __nonnull ((2));
 52#else
 53# ifdef __REDIRECT_NTH
 54extern int __REDIRECT_NTH (getrlimit, (__rlimit_resource_t __resource,
 55				       struct rlimit *__rlimits), getrlimit64)
 56				       __nonnull ((2));
 57# else
 58#  define getrlimit getrlimit64
 59# endif
 60#endif
 61#ifdef __USE_LARGEFILE64
 62extern int getrlimit64 (__rlimit_resource_t __resource,
 63			struct rlimit64 *__rlimits) __THROW __nonnull ((2));
 64#endif
 65
 66/* Set the soft and hard limits for RESOURCE to *RLIMITS.
 67   Only the super-user can increase hard limits.
 68   Return 0 if successful, -1 if not (and sets errno).  */
 69#ifndef __USE_FILE_OFFSET64
 70extern int setrlimit (__rlimit_resource_t __resource,
 71		      const struct rlimit *__rlimits) __THROW __nonnull ((2));
 72#else
 73# ifdef __REDIRECT_NTH
 74extern int __REDIRECT_NTH (setrlimit, (__rlimit_resource_t __resource,
 75				       const struct rlimit *__rlimits),
 76			   setrlimit64) __nonnull ((2));
 77# else
 78#  define setrlimit setrlimit64
 79# endif
 80#endif
 81#ifdef __USE_LARGEFILE64
 82extern int setrlimit64 (__rlimit_resource_t __resource,
 83			const struct rlimit64 *__rlimits) __THROW
 84			__nonnull ((2));
 85#endif
 86
 87/* Return resource usage information on process indicated by WHO
 88   and put it in *USAGE.  Returns 0 for success, -1 for failure.  */
 89extern int getrusage (__rusage_who_t __who, struct rusage *__usage) __THROW;
 90
 91#ifdef __USE_TIME64_REDIRECTS
 92# if defined(__REDIRECT_NTH)
 93extern int __REDIRECT_NTH (getrusage, (__rusage_who_t __who,
 94                                       struct rusage *__usage),
 95                           __getrusage64);
 96# else
 97# define getrusage __getrusage64
 98# endif
 99#endif
100
101/* Return the highest priority of any process specified by WHICH and WHO
102   (see above); if WHO is zero, the current process, process group, or user
103   (as specified by WHO) is used.  A lower priority number means higher
104   priority.  Priorities range from PRIO_MIN to PRIO_MAX (above).  */
105extern int getpriority (__priority_which_t __which, id_t __who) __THROW;
106
107/* Set the priority of all processes specified by WHICH and WHO (see above)
108   to PRIO.  Returns 0 on success, -1 on errors.  */
109extern int setpriority (__priority_which_t __which, id_t __who, int __prio)
110     __THROW;
111
112__END_DECLS
113
114#endif	/* sys/resource.h  */