1 /* Bit values & structures for resource limits. Linux version. 2 Copyright (C) 1994, 1996-2000, 2004, 2005, 2008, 2009, 2010, 2011 3 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, write to the Free 18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307 USA. */ 20 21 #ifndef _SYS_RESOURCE_H 22 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead." 23 #endif 24 25 #include <bits/types.h> 26 27 /* Transmute defines to enumerations. The macro re-definitions are 28 necessary because some programs want to test for operating system 29 features with #ifdef RUSAGE_SELF. In ISO C the reflexive 30 definition is a no-op. */ 31 32 /* Kinds of resource limit. */ 33 enum __rlimit_resource 34 { 35 /* Per-process CPU limit, in seconds. */ 36 RLIMIT_CPU = 0, 37 #define RLIMIT_CPU RLIMIT_CPU 38 39 /* Largest file that can be created, in bytes. */ 40 RLIMIT_FSIZE = 1, 41 #define RLIMIT_FSIZE RLIMIT_FSIZE 42 43 /* Maximum size of data segment, in bytes. */ 44 RLIMIT_DATA = 2, 45 #define RLIMIT_DATA RLIMIT_DATA 46 47 /* Maximum size of stack segment, in bytes. */ 48 RLIMIT_STACK = 3, 49 #define RLIMIT_STACK RLIMIT_STACK 50 51 /* Largest core file that can be created, in bytes. */ 52 RLIMIT_CORE = 4, 53 #define RLIMIT_CORE RLIMIT_CORE 54 55 /* Largest resident set size, in bytes. 56 This affects swapping; processes that are exceeding their 57 resident set size will be more likely to have physical memory 58 taken from them. */ 59 __RLIMIT_RSS = 5, 60 #define RLIMIT_RSS __RLIMIT_RSS 61 62 /* Number of open files. */ 63 RLIMIT_NOFILE = 7, 64 __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */ 65 #define RLIMIT_NOFILE RLIMIT_NOFILE 66 #define RLIMIT_OFILE __RLIMIT_OFILE 67 68 /* Address space limit. */ 69 RLIMIT_AS = 9, 70 #define RLIMIT_AS RLIMIT_AS 71 72 /* Number of processes. */ 73 __RLIMIT_NPROC = 6, 74 #define RLIMIT_NPROC __RLIMIT_NPROC 75 76 /* Locked-in-memory address space. */ 77 __RLIMIT_MEMLOCK = 8, 78 #define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK 79 80 /* Maximum number of file locks. */ 81 __RLIMIT_LOCKS = 10, 82 #define RLIMIT_LOCKS __RLIMIT_LOCKS 83 84 /* Maximum number of pending signals. */ 85 __RLIMIT_SIGPENDING = 11, 86 #define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING 87 88 /* Maximum bytes in POSIX message queues. */ 89 __RLIMIT_MSGQUEUE = 12, 90 #define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE 91 92 /* Maximum nice priority allowed to raise to. 93 Nice levels 19 .. -20 correspond to 0 .. 39 94 values of this resource limit. */ 95 __RLIMIT_NICE = 13, 96 #define RLIMIT_NICE __RLIMIT_NICE 97 98 /* Maximum realtime priority allowed for non-priviledged 99 processes. */ 100 __RLIMIT_RTPRIO = 14, 101 #define RLIMIT_RTPRIO __RLIMIT_RTPRIO 102 103 /* Maximum CPU time in s that a process scheduled under a real-time 104 scheduling policy may consume without making a blocking system 105 call before being forcibly descheduled. */ 106 __RLIMIT_RTTIME = 15, 107 #define RLIMIT_RTTIME __RLIMIT_RTTIME 108 109 __RLIMIT_NLIMITS = 16, 110 __RLIM_NLIMITS = __RLIMIT_NLIMITS 111 #define RLIMIT_NLIMITS __RLIMIT_NLIMITS 112 #define RLIM_NLIMITS __RLIM_NLIMITS 113 }; 114 115 /* Value to indicate that there is no limit. */ 116 #ifndef __USE_FILE_OFFSET64 117 # define RLIM_INFINITY ((unsigned long int)(~0UL)) 118 #else 119 # define RLIM_INFINITY 0xffffffffffffffffuLL 120 #endif 121 122 #ifdef __USE_LARGEFILE64 123 # define RLIM64_INFINITY 0xffffffffffffffffuLL 124 #endif 125 126 /* We can represent all limits. */ 127 #define RLIM_SAVED_MAX RLIM_INFINITY 128 #define RLIM_SAVED_CUR RLIM_INFINITY 129 130 131 /* Type for resource quantity measurement. */ 132 #ifndef __USE_FILE_OFFSET64 133 typedef __rlim_t rlim_t; 134 #else 135 typedef __rlim64_t rlim_t; 136 #endif 137 #ifdef __USE_LARGEFILE64 138 typedef __rlim64_t rlim64_t; 139 #endif 140 141 struct rlimit 142 { 143 /* The current (soft) limit. */ 144 rlim_t rlim_cur; 145 /* The hard limit. */ 146 rlim_t rlim_max; 147 }; 148 149 #ifdef __USE_LARGEFILE64 150 struct rlimit64 151 { 152 /* The current (soft) limit. */ 153 rlim64_t rlim_cur; 154 /* The hard limit. */ 155 rlim64_t rlim_max; 156 }; 157 #endif 158 159 /* Whose usage statistics do you want? */ 160 enum __rusage_who 161 { 162 /* The calling process. */ 163 RUSAGE_SELF = 0, 164 #define RUSAGE_SELF RUSAGE_SELF 165 166 /* All of its terminated child processes. */ 167 RUSAGE_CHILDREN = -1 168 #define RUSAGE_CHILDREN RUSAGE_CHILDREN 169 170 #ifdef __USE_GNU 171 , 172 /* The calling thread. */ 173 RUSAGE_THREAD = 1 174 # define RUSAGE_THREAD RUSAGE_THREAD 175 /* Name for the same functionality on Solaris. */ 176 # define RUSAGE_LWP RUSAGE_THREAD 177 #endif 178 }; 179 180 #define __need_timeval 181 #include <bits/time.h> /* For `struct timeval'. */ 182 183 /* Structure which says how much of each resource has been used. */ 184 struct rusage 185 { 186 /* Total amount of user time used. */ 187 struct timeval ru_utime; 188 /* Total amount of system time used. */ 189 struct timeval ru_stime; 190 /* Maximum resident set size (in kilobytes). */ 191 long int ru_maxrss; 192 /* Amount of sharing of text segment memory 193 with other processes (kilobyte-seconds). */ 194 long int ru_ixrss; 195 /* Amount of data segment memory used (kilobyte-seconds). */ 196 long int ru_idrss; 197 /* Amount of stack memory used (kilobyte-seconds). */ 198 long int ru_isrss; 199 /* Number of soft page faults (i.e. those serviced by reclaiming 200 a page from the list of pages awaiting reallocation. */ 201 long int ru_minflt; 202 /* Number of hard page faults (i.e. those that required I/O). */ 203 long int ru_majflt; 204 /* Number of times a process was swapped out of physical memory. */ 205 long int ru_nswap; 206 /* Number of input operations via the file system. Note: This 207 and `ru_oublock' do not include operations with the cache. */ 208 long int ru_inblock; 209 /* Number of output operations via the file system. */ 210 long int ru_oublock; 211 /* Number of IPC messages sent. */ 212 long int ru_msgsnd; 213 /* Number of IPC messages received. */ 214 long int ru_msgrcv; 215 /* Number of signals delivered. */ 216 long int ru_nsignals; 217 /* Number of voluntary context switches, i.e. because the process 218 gave up the process before it had to (usually to wait for some 219 resource to be available). */ 220 long int ru_nvcsw; 221 /* Number of involuntary context switches, i.e. a higher priority process 222 became runnable or the current process used up its time slice. */ 223 long int ru_nivcsw; 224 }; 225 226 /* Priority limits. */ 227 #define PRIO_MIN -20 /* Minimum priority a process can have. */ 228 #define PRIO_MAX 20 /* Maximum priority a process can have. */ 229 230 /* The type of the WHICH argument to `getpriority' and `setpriority', 231 indicating what flavor of entity the WHO argument specifies. */ 232 enum __priority_which 233 { 234 PRIO_PROCESS = 0, /* WHO is a process ID. */ 235 #define PRIO_PROCESS PRIO_PROCESS 236 PRIO_PGRP = 1, /* WHO is a process group ID. */ 237 #define PRIO_PGRP PRIO_PGRP 238 PRIO_USER = 2 /* WHO is a user ID. */ 239 #define PRIO_USER PRIO_USER 240 }; 241 242 243 __BEGIN_DECLS 244 245 #ifdef __USE_GNU 246 /* Modify and return resource limits of a process atomically. */ 247 # ifndef __USE_FILE_OFFSET64 248 extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource, 249 __const struct rlimit *__new_limit, 250 struct rlimit *__old_limit) __THROW; 251 # else 252 # ifdef __REDIRECT_NTH 253 extern int __REDIRECT_NTH (prlimit, (__pid_t __pid, 254 enum __rlimit_resource __resource, 255 __const struct rlimit *__new_limit, 256 struct rlimit *__old_limit), prlimit64); 257 # else 258 # define prlimit prlimit64 259 # endif 260 # endif 261 # ifdef __USE_LARGEFILE64 262 extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource, 263 __const struct rlimit64 *__new_limit, 264 struct rlimit64 *__old_limit) __THROW; 265 # endif 266 #endif 267 268 __END_DECLS 269
