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f0e44959 | 1 | /* Bit values & structures for resource limits. Linux version. |
d614a753 | 2 | Copyright (C) 1994-2020 Free Software Foundation, Inc. |
54d79e99 UD |
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 | |
41bdb6e2 AJ |
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. | |
54d79e99 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
54d79e99 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
f0e44959 | 18 | |
f4017d20 UD |
19 | #ifndef _SYS_RESOURCE_H |
20 | # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead." | |
21 | #endif | |
22 | ||
dfd2257a | 23 | #include <bits/types.h> |
f0e44959 UD |
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. */ | |
31 | enum __rlimit_resource | |
32 | { | |
33 | /* Per-process CPU limit, in seconds. */ | |
63a34b0f | 34 | RLIMIT_CPU = 0, |
f0e44959 UD |
35 | #define RLIMIT_CPU RLIMIT_CPU |
36 | ||
37 | /* Largest file that can be created, in bytes. */ | |
63a34b0f | 38 | RLIMIT_FSIZE = 1, |
f0e44959 UD |
39 | #define RLIMIT_FSIZE RLIMIT_FSIZE |
40 | ||
41 | /* Maximum size of data segment, in bytes. */ | |
63a34b0f | 42 | RLIMIT_DATA = 2, |
f0e44959 UD |
43 | #define RLIMIT_DATA RLIMIT_DATA |
44 | ||
45 | /* Maximum size of stack segment, in bytes. */ | |
63a34b0f | 46 | RLIMIT_STACK = 3, |
f0e44959 UD |
47 | #define RLIMIT_STACK RLIMIT_STACK |
48 | ||
49 | /* Largest core file that can be created, in bytes. */ | |
63a34b0f | 50 | RLIMIT_CORE = 4, |
f0e44959 UD |
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. */ | |
30c06335 UD |
57 | __RLIMIT_RSS = 5, |
58 | #define RLIMIT_RSS __RLIMIT_RSS | |
f0e44959 UD |
59 | |
60 | /* Number of open files. */ | |
63a34b0f | 61 | RLIMIT_NOFILE = 7, |
30c06335 | 62 | __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */ |
f0e44959 | 63 | #define RLIMIT_NOFILE RLIMIT_NOFILE |
30c06335 | 64 | #define RLIMIT_OFILE __RLIMIT_OFILE |
f0e44959 | 65 | |
f7d1f342 | 66 | /* Address space limit. */ |
63a34b0f | 67 | RLIMIT_AS = 9, |
f0e44959 UD |
68 | #define RLIMIT_AS RLIMIT_AS |
69 | ||
70 | /* Number of processes. */ | |
30c06335 UD |
71 | __RLIMIT_NPROC = 6, |
72 | #define RLIMIT_NPROC __RLIMIT_NPROC | |
f0e44959 UD |
73 | |
74 | /* Locked-in-memory address space. */ | |
30c06335 UD |
75 | __RLIMIT_MEMLOCK = 8, |
76 | #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK | |
f0e44959 | 77 | |
ee6c5330 | 78 | /* Maximum number of file locks. */ |
30c06335 UD |
79 | __RLIMIT_LOCKS = 10, |
80 | #define RLIMIT_LOCKS __RLIMIT_LOCKS | |
ee6c5330 | 81 | |
30c06335 UD |
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 | ||
dc69e770 UD |
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, | |
6a463507 | 99 | #define RLIMIT_RTPRIO __RLIMIT_RTPRIO |
dc69e770 | 100 | |
67f86a25 UD |
101 | /* Maximum CPU time in µs 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, | |
30c06335 UD |
108 | __RLIM_NLIMITS = __RLIMIT_NLIMITS |
109 | #define RLIMIT_NLIMITS __RLIMIT_NLIMITS | |
110 | #define RLIM_NLIMITS __RLIM_NLIMITS | |
f0e44959 UD |
111 | }; |
112 | ||
9756dfe1 UD |
113 | /* Value to indicate that there is no limit. */ |
114 | #ifndef __USE_FILE_OFFSET64 | |
5e1a27a9 | 115 | # define RLIM_INFINITY ((__rlim_t) -1) |
9756dfe1 | 116 | #else |
f7d1f342 | 117 | # define RLIM_INFINITY 0xffffffffffffffffuLL |
9756dfe1 UD |
118 | #endif |
119 | ||
120 | #ifdef __USE_LARGEFILE64 | |
f7d1f342 | 121 | # define RLIM64_INFINITY 0xffffffffffffffffuLL |
9756dfe1 UD |
122 | #endif |
123 | ||
4bae5567 UD |
124 | /* We can represent all limits. */ |
125 | #define RLIM_SAVED_MAX RLIM_INFINITY | |
126 | #define RLIM_SAVED_CUR RLIM_INFINITY | |
127 | ||
9756dfe1 | 128 | |
dfd2257a UD |
129 | /* Type for resource quantity measurement. */ |
130 | #ifndef __USE_FILE_OFFSET64 | |
131 | typedef __rlim_t rlim_t; | |
132 | #else | |
133 | typedef __rlim64_t rlim_t; | |
134 | #endif | |
135 | #ifdef __USE_LARGEFILE64 | |
136 | typedef __rlim64_t rlim64_t; | |
137 | #endif | |
138 | ||
f0e44959 | 139 | struct rlimit |
dfd2257a UD |
140 | { |
141 | /* The current (soft) limit. */ | |
142 | rlim_t rlim_cur; | |
143 | /* The hard limit. */ | |
144 | rlim_t rlim_max; | |
145 | }; | |
146 | ||
147 | #ifdef __USE_LARGEFILE64 | |
148 | struct rlimit64 | |
149 | { | |
150 | /* The current (soft) limit. */ | |
151 | rlim64_t rlim_cur; | |
152 | /* The hard limit. */ | |
153 | rlim64_t rlim_max; | |
154 | }; | |
155 | #endif | |
f0e44959 UD |
156 | |
157 | /* Whose usage statistics do you want? */ | |
158 | enum __rusage_who | |
159 | { | |
160 | /* The calling process. */ | |
161 | RUSAGE_SELF = 0, | |
162 | #define RUSAGE_SELF RUSAGE_SELF | |
163 | ||
164 | /* All of its terminated child processes. */ | |
960af8c2 | 165 | RUSAGE_CHILDREN = -1 |
f0e44959 | 166 | #define RUSAGE_CHILDREN RUSAGE_CHILDREN |
1ce0612b UD |
167 | |
168 | #ifdef __USE_GNU | |
960af8c2 | 169 | , |
1ce0612b UD |
170 | /* The calling thread. */ |
171 | RUSAGE_THREAD = 1 | |
172 | # define RUSAGE_THREAD RUSAGE_THREAD | |
173 | /* Name for the same functionality on Solaris. */ | |
174 | # define RUSAGE_LWP RUSAGE_THREAD | |
175 | #endif | |
f0e44959 UD |
176 | }; |
177 | ||
05b68e14 | 178 | #include <bits/types/struct_timeval.h> |
a66bc30d | 179 | #include <bits/types/struct_rusage.h> |
f0e44959 UD |
180 | |
181 | /* Priority limits. */ | |
182 | #define PRIO_MIN -20 /* Minimum priority a process can have. */ | |
183 | #define PRIO_MAX 20 /* Maximum priority a process can have. */ | |
184 | ||
185 | /* The type of the WHICH argument to `getpriority' and `setpriority', | |
186 | indicating what flavor of entity the WHO argument specifies. */ | |
187 | enum __priority_which | |
188 | { | |
189 | PRIO_PROCESS = 0, /* WHO is a process ID. */ | |
2864e767 | 190 | #define PRIO_PROCESS PRIO_PROCESS |
f0e44959 | 191 | PRIO_PGRP = 1, /* WHO is a process group ID. */ |
2864e767 | 192 | #define PRIO_PGRP PRIO_PGRP |
f0e44959 | 193 | PRIO_USER = 2 /* WHO is a user ID. */ |
2864e767 | 194 | #define PRIO_USER PRIO_USER |
f0e44959 | 195 | }; |
c08fb0d7 UD |
196 | |
197 | ||
198 | __BEGIN_DECLS | |
199 | ||
200 | #ifdef __USE_GNU | |
201 | /* Modify and return resource limits of a process atomically. */ | |
202 | # ifndef __USE_FILE_OFFSET64 | |
203 | extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource, | |
a784e502 | 204 | const struct rlimit *__new_limit, |
c08fb0d7 UD |
205 | struct rlimit *__old_limit) __THROW; |
206 | # else | |
207 | # ifdef __REDIRECT_NTH | |
208 | extern int __REDIRECT_NTH (prlimit, (__pid_t __pid, | |
209 | enum __rlimit_resource __resource, | |
a784e502 | 210 | const struct rlimit *__new_limit, |
c08fb0d7 UD |
211 | struct rlimit *__old_limit), prlimit64); |
212 | # else | |
213 | # define prlimit prlimit64 | |
214 | # endif | |
215 | # endif | |
216 | # ifdef __USE_LARGEFILE64 | |
217 | extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource, | |
a784e502 | 218 | const struct rlimit64 *__new_limit, |
c08fb0d7 UD |
219 | struct rlimit64 *__old_limit) __THROW; |
220 | # endif | |
221 | #endif | |
222 | ||
223 | __END_DECLS |