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1/* Bit values & structures for resource limits. Linux/MIPS version.
2 Copyright (C) 1994-2025 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, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _SYS_RESOURCE_H
20# error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
21#endif
22
23#include <bits/types.h>
24
25/* Transmute defines to enumerations. The macro re-definitions are
26 necessary because some programs want to test for operating system
27 features with #ifdef RUSAGE_SELF. In ISO C the reflexive
28 definition is a no-op. */
29
30/* Kinds of resource limit. */
31enum __rlimit_resource
32{
33 /* Per-process CPU limit, in seconds. */
34 RLIMIT_CPU = 0,
35#define RLIMIT_CPU RLIMIT_CPU
36
37 /* Largest file that can be created, in bytes. */
38 RLIMIT_FSIZE = 1,
39#define RLIMIT_FSIZE RLIMIT_FSIZE
40
41 /* Maximum size of data segment, in bytes. */
42 RLIMIT_DATA = 2,
43#define RLIMIT_DATA RLIMIT_DATA
44
45 /* Maximum size of stack segment, in bytes. */
46 RLIMIT_STACK = 3,
47#define RLIMIT_STACK RLIMIT_STACK
48
49 /* Largest core file that can be created, in bytes. */
50 RLIMIT_CORE = 4,
51#define RLIMIT_CORE RLIMIT_CORE
52
53 /* Largest resident set size, in bytes.
54 This affects swapping; processes that are exceeding their
55 resident set size will be more likely to have physical memory
56 taken from them. */
57 __RLIMIT_RSS = 7,
58#define RLIMIT_RSS __RLIMIT_RSS
59
60 /* Number of open files. */
61 RLIMIT_NOFILE = 5,
62 __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
63#define RLIMIT_NOFILE RLIMIT_NOFILE
64#define RLIMIT_OFILE __RLIMIT_OFILE
65
66 /* Address space limit (?) */
67 RLIMIT_AS = 6,
68#define RLIMIT_AS RLIMIT_AS
69
70 /* Number of processes. */
71 __RLIMIT_NPROC = 8,
72#define RLIMIT_NPROC __RLIMIT_NPROC
73
74 /* Locked-in-memory address space. */
75 __RLIMIT_MEMLOCK = 9,
76#define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
77
78 /* Maximum number of file locks. */
79 __RLIMIT_LOCKS = 10,
80#define RLIMIT_LOCKS __RLIMIT_LOCKS
81
82 /* Maximum number of pending signals. */
83 __RLIMIT_SIGPENDING = 11,
84#define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
85
86 /* Maximum bytes in POSIX message queues. */
87 __RLIMIT_MSGQUEUE = 12,
88#define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
89
90 /* Maximum nice priority allowed to raise to.
91 Nice levels 19 .. -20 correspond to 0 .. 39
92 values of this resource limit. */
93 __RLIMIT_NICE = 13,
94#define RLIMIT_NICE __RLIMIT_NICE
95
96 /* Maximum realtime priority allowed for non-priviledged
97 processes. */
98 __RLIMIT_RTPRIO = 14,
99#define RLIMIT_RTPRIO __RLIMIT_RTPRIO
100
101 /* Maximum CPU time in microseconds that a process scheduled under a real-time
102 scheduling policy may consume without making a blocking system
103 call before being forcibly descheduled. */
104 __RLIMIT_RTTIME = 15,
105#define RLIMIT_RTTIME __RLIMIT_RTTIME
106
107 __RLIMIT_NLIMITS = 16,
108 __RLIM_NLIMITS = __RLIMIT_NLIMITS
109#define RLIMIT_NLIMITS __RLIMIT_NLIMITS
110#define RLIM_NLIMITS __RLIM_NLIMITS
111};
112
113/* Value to indicate that there is no limit. */
114#if _MIPS_SIM == _ABI64
115/* The N64 syscall uses this value. */
116# define RLIM_INFINITY 0xffffffffffffffffUL
117# ifdef __USE_LARGEFILE64
118# define RLIM64_INFINITY 0xffffffffffffffffUL
119# endif
120#else
121/* The O32 and N32 syscalls use 0x7fffffff. */
122# ifndef __USE_FILE_OFFSET64
123# define RLIM_INFINITY ((long int)(~0UL >> 1))
124# else
125# define RLIM_INFINITY 0xffffffffffffffffULL
126# endif
127# ifdef __USE_LARGEFILE64
128# define RLIM64_INFINITY 0xffffffffffffffffULL
129# endif
130#endif
131
132/* We can represent all limits. */
133#define RLIM_SAVED_MAX RLIM_INFINITY
134#define RLIM_SAVED_CUR RLIM_INFINITY
135
136
137/* Type for resource quantity measurement. */
138#ifndef __USE_FILE_OFFSET64
139typedef __rlim_t rlim_t;
140#else
141typedef __rlim64_t rlim_t;
142#endif
143#ifdef __USE_LARGEFILE64
144typedef __rlim64_t rlim64_t;
145#endif
146
147struct rlimit
148 {
149 /* The current (soft) limit. */
150 rlim_t rlim_cur;
151 /* The hard limit. */
152 rlim_t rlim_max;
153 };
154
155#ifdef __USE_LARGEFILE64
156struct rlimit64
157 {
158 /* The current (soft) limit. */
159 rlim64_t rlim_cur;
160 /* The hard limit. */
161 rlim64_t rlim_max;
162 };
163#endif
164
165/* Whose usage statistics do you want? */
166enum __rusage_who
167{
168 /* The calling process. */
169 RUSAGE_SELF = 0,
170#define RUSAGE_SELF RUSAGE_SELF
171
172 /* All of its terminated child processes. */
173 RUSAGE_CHILDREN = -1
174#define RUSAGE_CHILDREN RUSAGE_CHILDREN
175
176#ifdef __USE_GNU
177 ,
178 /* The calling thread. */
179 RUSAGE_THREAD = 1
180# define RUSAGE_THREAD RUSAGE_THREAD
181 /* Name for the same functionality on Solaris. */
182# define RUSAGE_LWP RUSAGE_THREAD
183#endif
184};
185
186#include <bits/types/struct_timeval.h>
187#include <bits/types/struct_rusage.h>
188
189/* Priority limits. */
190#define PRIO_MIN -20 /* Minimum priority a process can have. */
191#define PRIO_MAX 20 /* Maximum priority a process can have. */
192
193/* The type of the WHICH argument to `getpriority' and `setpriority',
194 indicating what flavor of entity the WHO argument specifies. */
195enum __priority_which
196{
197 PRIO_PROCESS = 0, /* WHO is a process ID. */
198#define PRIO_PROCESS PRIO_PROCESS
199 PRIO_PGRP = 1, /* WHO is a process group ID. */
200#define PRIO_PGRP PRIO_PGRP
201 PRIO_USER = 2 /* WHO is a user ID. */
202#define PRIO_USER PRIO_USER
203};
204
205
206__BEGIN_DECLS
207
208#ifdef __USE_GNU
209/* Modify and return resource limits of a process atomically. */
210# ifndef __USE_FILE_OFFSET64
211extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource,
212 const struct rlimit *__new_limit,
213 struct rlimit *__old_limit) __THROW;
214# else
215# ifdef __REDIRECT_NTH
216extern int __REDIRECT_NTH (prlimit, (__pid_t __pid,
217 enum __rlimit_resource __resource,
218 const struct rlimit *__new_limit,
219 struct rlimit *__old_limit), prlimit64);
220# else
221# define prlimit prlimit64
222# endif
223# endif
224# ifdef __USE_LARGEFILE64
225extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource,
226 const struct rlimit64 *__new_limit,
227 struct rlimit64 *__old_limit) __THROW;
228# endif
229#endif
230
231__END_DECLS