sysdeps/unix/sysv/linux/bits/resource.h

   1 /* Bit values & structures for resource limits.  Linux version.
   2    Copyright (C) 1994, 1996, 1997 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _SYS_RESOURCE_H
  21 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
  22 #endif
  23
  24 #include <asm/resource.h>
  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 = RLIMIT_CPU,
  37 #undef RLIMIT_CPU
  38   RLIMIT_CPU = _RLIMIT_CPU,
  39 #define RLIMIT_CPU RLIMIT_CPU
  40
  41   /* Largest file that can be created, in bytes.  */
  42   _RLIMIT_FSIZE = RLIMIT_FSIZE,
  43 #undef RLIMIT_FSIZE
  44   RLIMIT_FSIZE = _RLIMIT_FSIZE,
  45 #define RLIMIT_FSIZE RLIMIT_FSIZE
  46
  47   /* Maximum size of data segment, in bytes.  */
  48   _RLIMIT_DATA = RLIMIT_DATA,
  49 #undef RLIMIT_DATA
  50   RLIMIT_DATA = _RLIMIT_DATA,
  51 #define RLIMIT_DATA RLIMIT_DATA
  52
  53   /* Maximum size of stack segment, in bytes.  */
  54   _RLIMIT_STACK = RLIMIT_STACK,
  55 #undef RLIMIT_STACK
  56   RLIMIT_STACK = _RLIMIT_STACK,
  57 #define RLIMIT_STACK RLIMIT_STACK
  58
  59   /* Largest core file that can be created, in bytes.  */
  60   _RLIMIT_CORE = RLIMIT_CORE,
  61 #undef RLIMIT_CORE
  62   RLIMIT_CORE = _RLIMIT_CORE,
  63 #define RLIMIT_CORE RLIMIT_CORE
  64
  65   /* Largest resident set size, in bytes.
  66      This affects swapping; processes that are exceeding their
  67      resident set size will be more likely to have physical memory
  68      taken from them.  */
  69   _RLIMIT_RSS = RLIMIT_RSS,
  70 #undef RLIMIT_RSS
  71   RLIMIT_RSS = _RLIMIT_RSS,
  72 #define RLIMIT_RSS RLIMIT_RSS
  73
  74   /* Number of open files.  */
  75   _RLIMIT_NOFILE = RLIMIT_NOFILE,
  76 #undef RLIMIT_NOFILE
  77   RLIMIT_NOFILE = _RLIMIT_NOFILE,
  78   RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same.  */
  79 #define RLIMIT_NOFILE RLIMIT_NOFILE
  80 #define RLIMIT_OFILE RLIMIT_OFILE
  81
  82   /* Address space limit (?) */
  83   _RLIMIT_AS = RLIMIT_AS,
  84 #undef RLIMIT_AS
  85   RLIMIT_AS = _RLIMIT_AS,
  86 #define RLIMIT_AS RLIMIT_AS
  87
  88   /* Number of processes.  */
  89   _RLIMIT_NPROC = RLIMIT_NPROC,
  90 #undef RLIMIT_NPROC
  91   RLIMIT_NPROC = _RLIMIT_NPROC,
  92 #define RLIMIT_NPROC RLIMIT_NPROC
  93
  94   /* Locked-in-memory address space.  */
  95   _RLIMIT_MEMLOCK = RLIMIT_MEMLOCK,
  96 #undef RLIMIT_MEMLOCK
  97   RLIMIT_MEMLOCK = _RLIMIT_MEMLOCK,
  98 #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK
  99
 100   RLIMIT_NLIMITS = RLIM_NLIMITS,
 101 #undef RLIM_NLIMITS
 102   RLIM_NLIMITS = RLIMIT_NLIMITS,
 103 #define RLIMIT_NLIMITS RLIMIT_NLIMITS
 104 #define RLIM_NLIMITS RLIM_NLIMITS
 105 };
 106
 107 /* Value to indicate that there is no limit.  */
 108 #ifndef __USE_FILE_OFFSET64
 109 # define RLIM_INFINITY ((long int)(~0UL >> 1))
 110 #else
 111 # define RLIM_INFINITY 0x7fffffffffffffffLL
 112 #endif
 113
 114 #ifdef __USE_LARGEFILE64
 115 # define RLIM64_INFINITY 0x7fffffffffffffffLL
 116 #endif
 117
 118
 119 /* Type for resource quantity measurement.  */
 120 #ifndef __USE_FILE_OFFSET64
 121 typedef __rlim_t rlim_t;
 122 #else
 123 typedef __rlim64_t rlim_t;
 124 #endif
 125 #ifdef __USE_LARGEFILE64
 126 typedef __rlim64_t rlim64_t;
 127 #endif
 128
 129 struct rlimit
 130   {
 131     /* The current (soft) limit.  */
 132     rlim_t rlim_cur;
 133     /* The hard limit.  */
 134     rlim_t rlim_max;
 135   };
 136
 137 #ifdef __USE_LARGEFILE64
 138 struct rlimit64
 139   {
 140     /* The current (soft) limit.  */
 141     rlim64_t rlim_cur;
 142     /* The hard limit.  */
 143     rlim64_t rlim_max;
 144  };
 145 #endif
 146
 147 /* Whose usage statistics do you want?  */
 148 enum __rusage_who
 149 {
 150   /* The calling process.  */
 151   RUSAGE_SELF = 0,
 152 #define RUSAGE_SELF RUSAGE_SELF
 153
 154   /* All of its terminated child processes.  */
 155   RUSAGE_CHILDREN = -1,
 156 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
 157
 158   /* Both.  */
 159   RUSAGE_BOTH = -2
 160 #define RUSAGE_BOTH RUSAGE_BOTH
 161 };
 162
 163 #define __need_timeval
 164 #include <bits/time.h>          /* For `struct timeval'.  */
 165
 166 /* Structure which says how much of each resource has been used.  */
 167 struct rusage
 168   {
 169     /* Total amount of user time used.  */
 170     struct timeval ru_utime;
 171     /* Total amount of system time used.  */
 172     struct timeval ru_stime;
 173     /* Maximum resident set size (in kilobytes).  */
 174     long int ru_maxrss;
 175     /* Amount of sharing of text segment memory
 176        with other processes (kilobyte-seconds).  */
 177     long int ru_ixrss;
 178     /* Amount of data segment memory used (kilobyte-seconds).  */
 179     long int ru_idrss;
 180     /* Amount of stack memory used (kilobyte-seconds).  */
 181     long int ru_isrss;
 182     /* Number of soft page faults (i.e. those serviced by reclaiming
 183        a page from the list of pages awaiting reallocation.  */
 184     long int ru_minflt;
 185     /* Number of hard page faults (i.e. those that required I/O).  */
 186     long int ru_majflt;
 187     /* Number of times a process was swapped out of physical memory.  */
 188     long int ru_nswap;
 189     /* Number of input operations via the file system.  Note: This
 190        and `ru_oublock' do not include operations with the cache.  */
 191     long int ru_inblock;
 192     /* Number of output operations via the file system.  */
 193     long int ru_oublock;
 194     /* Number of IPC messages sent.  */
 195     long int ru_msgsnd;
 196     /* Number of IPC messages received.  */
 197     long int ru_msgrcv;
 198     /* Number of signals delivered.  */
 199     long int ru_nsignals;
 200     /* Number of voluntary context switches, i.e. because the process
 201        gave up the process before it had to (usually to wait for some
 202        resource to be available).  */
 203     long int ru_nvcsw;
 204     /* Number of involuntary context switches, i.e. a higher priority process
 205        became runnable or the current process used up its time slice.  */
 206     long int ru_nivcsw;
 207   };
 208
 209 /* Priority limits.  */
 210 #define PRIO_MIN        -20     /* Minimum priority a process can have.  */
 211 #define PRIO_MAX        20      /* Maximum priority a process can have.  */
 212
 213 /* The type of the WHICH argument to `getpriority' and `setpriority',
 214    indicating what flavor of entity the WHO argument specifies.  */
 215 enum __priority_which
 216 {
 217   PRIO_PROCESS = 0,             /* WHO is a process ID.  */
 218   PRIO_PGRP = 1,                /* WHO is a process group ID.  */
 219   PRIO_USER = 2                 /* WHO is a user ID.  */
 220 };