1/* Bit values & structures for resource limits. Linux version. 2 Copyright (C) 1994, 1996, 1997, 1998, 1999, 2000, 2004, 2005 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. */ 33enum __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 __RLIMIT_NLIMITS = 15, 104 __RLIM_NLIMITS = __RLIMIT_NLIMITS 105#define RLIMIT_NLIMITS __RLIMIT_NLIMITS 106#define RLIM_NLIMITS __RLIM_NLIMITS 107}; 108 109/* Value to indicate that there is no limit. */ 110#ifndef __USE_FILE_OFFSET64 111# define RLIM_INFINITY ((unsigned long int)(~0UL)) 112#else 113# define RLIM_INFINITY 0xffffffffffffffffuLL 114#endif 115 116#ifdef __USE_LARGEFILE64 117# define RLIM64_INFINITY 0xffffffffffffffffuLL 118#endif 119 120/* We can represent all limits. */ 121#define RLIM_SAVED_MAX RLIM_INFINITY 122#define RLIM_SAVED_CUR RLIM_INFINITY 123 124 125/* Type for resource quantity measurement. */ 126#ifndef __USE_FILE_OFFSET64 127typedef __rlim_t rlim_t; 128#else 129typedef __rlim64_t rlim_t; 130#endif 131#ifdef __USE_LARGEFILE64 132typedef __rlim64_t rlim64_t; 133#endif 134 135struct rlimit 136 { 137 /* The current (soft) limit. */ 138 rlim_t rlim_cur; 139 /* The hard limit. */ 140 rlim_t rlim_max; 141 }; 142 143#ifdef __USE_LARGEFILE64 144struct rlimit64 145 { 146 /* The current (soft) limit. */ 147 rlim64_t rlim_cur; 148 /* The hard limit. */ 149 rlim64_t rlim_max; 150 }; 151#endif 152 153/* Whose usage statistics do you want? */ 154enum __rusage_who 155{ 156 /* The calling process. */ 157 RUSAGE_SELF = 0, 158#define RUSAGE_SELF RUSAGE_SELF 159 160 /* All of its terminated child processes. */ 161 RUSAGE_CHILDREN = -1 162#define RUSAGE_CHILDREN RUSAGE_CHILDREN 163}; 164 165#define __need_timeval 166#include <bits/time.h> /* For `struct timeval'. */ 167 168/* Structure which says how much of each resource has been used. */ 169struct rusage 170 { 171 /* Total amount of user time used. */ 172 struct timeval ru_utime; 173 /* Total amount of system time used. */ 174 struct timeval ru_stime; 175 /* Maximum resident set size (in kilobytes). */ 176 long int ru_maxrss; 177 /* Amount of sharing of text segment memory 178 with other processes (kilobyte-seconds). */ 179 long int ru_ixrss; 180 /* Amount of data segment memory used (kilobyte-seconds). */ 181 long int ru_idrss; 182 /* Amount of stack memory used (kilobyte-seconds). */ 183 long int ru_isrss; 184 /* Number of soft page faults (i.e. those serviced by reclaiming 185 a page from the list of pages awaiting reallocation. */ 186 long int ru_minflt; 187 /* Number of hard page faults (i.e. those that required I/O). */ 188 long int ru_majflt; 189 /* Number of times a process was swapped out of physical memory. */ 190 long int ru_nswap; 191 /* Number of input operations via the file system. Note: This 192 and `ru_oublock' do not include operations with the cache. */ 193 long int ru_inblock; 194 /* Number of output operations via the file system. */ 195 long int ru_oublock; 196 /* Number of IPC messages sent. */ 197 long int ru_msgsnd; 198 /* Number of IPC messages received. */ 199 long int ru_msgrcv; 200 /* Number of signals delivered. */ 201 long int ru_nsignals; 202 /* Number of voluntary context switches, i.e. because the process 203 gave up the process before it had to (usually to wait for some 204 resource to be available). */ 205 long int ru_nvcsw; 206 /* Number of involuntary context switches, i.e. a higher priority process 207 became runnable or the current process used up its time slice. */ 208 long int ru_nivcsw; 209 }; 210 211/* Priority limits. */ 212#define PRIO_MIN -20 /* Minimum priority a process can have. */ 213#define PRIO_MAX 20 /* Maximum priority a process can have. */ 214 215/* The type of the WHICH argument to `getpriority' and `setpriority', 216 indicating what flavor of entity the WHO argument specifies. */ 217enum __priority_which 218{ 219 PRIO_PROCESS = 0, /* WHO is a process ID. */ 220#define PRIO_PROCESS PRIO_PROCESS 221 PRIO_PGRP = 1, /* WHO is a process group ID. */ 222#define PRIO_PGRP PRIO_PGRP 223 PRIO_USER = 2 /* WHO is a user ID. */ 224#define PRIO_USER PRIO_USER 225}; 226