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 #include <asm/resource.h>
  21 #include <bits/types.h>
  22
  23 /* Transmute defines to enumerations.  The macro re-definitions are
  24    necessary because some programs want to test for operating system
  25    features with #ifdef RUSAGE_SELF.  In ISO C the reflexive
  26    definition is a no-op.  */
  27
  28 /* Kinds of resource limit.  */
  29 enum __rlimit_resource
  30 {
  31   /* Per-process CPU limit, in seconds.  */
  32   _RLIMIT_CPU = RLIMIT_CPU,
  33 #undef RLIMIT_CPU
  34   RLIMIT_CPU = _RLIMIT_CPU,
  35 #define RLIMIT_CPU RLIMIT_CPU
  36
  37   /* Largest file that can be created, in bytes.  */
  38   _RLIMIT_FSIZE = RLIMIT_FSIZE,
  39 #undef RLIMIT_FSIZE
  40   RLIMIT_FSIZE = _RLIMIT_FSIZE,
  41 #define RLIMIT_FSIZE RLIMIT_FSIZE
  42
  43   /* Maximum size of data segment, in bytes.  */
  44   _RLIMIT_DATA = RLIMIT_DATA,
  45 #undef RLIMIT_DATA
  46   RLIMIT_DATA = _RLIMIT_DATA,
  47 #define RLIMIT_DATA RLIMIT_DATA
  48
  49   /* Maximum size of stack segment, in bytes.  */
  50   _RLIMIT_STACK = RLIMIT_STACK,
  51 #undef RLIMIT_STACK
  52   RLIMIT_STACK = _RLIMIT_STACK,
  53 #define RLIMIT_STACK RLIMIT_STACK
  54
  55   /* Largest core file that can be created, in bytes.  */
  56   _RLIMIT_CORE = RLIMIT_CORE,
  57 #undef RLIMIT_CORE
  58   RLIMIT_CORE = _RLIMIT_CORE,
  59 #define RLIMIT_CORE RLIMIT_CORE
  60
  61   /* Largest resident set size, in bytes.
  62      This affects swapping; processes that are exceeding their
  63      resident set size will be more likely to have physical memory
  64      taken from them.  */
  65   _RLIMIT_RSS = RLIMIT_RSS,
  66 #undef RLIMIT_RSS
  67   RLIMIT_RSS = _RLIMIT_RSS,
  68 #define RLIMIT_RSS RLIMIT_RSS
  69
  70   /* Number of open files.  */
  71   _RLIMIT_NOFILE = RLIMIT_NOFILE,
  72 #undef RLIMIT_NOFILE
  73   RLIMIT_NOFILE = _RLIMIT_NOFILE,
  74   RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same.  */
  75 #define RLIMIT_NOFILE RLIMIT_NOFILE
  76 #define RLIMIT_OFILE RLIMIT_OFILE
  77
  78   /* Address space limit (?) */
  79   _RLIMIT_AS = RLIMIT_AS,
  80 #undef RLIMIT_AS
  81   RLIMIT_AS = _RLIMIT_AS,
  82 #define RLIMIT_AS RLIMIT_AS
  83
  84   /* Number of processes.  */
  85   _RLIMIT_NPROC = RLIMIT_NPROC,
  86 #undef RLIMIT_NPROC
  87   RLIMIT_NPROC = _RLIMIT_NPROC,
  88 #define RLIMIT_NPROC RLIMIT_NPROC
  89
  90   /* Locked-in-memory address space.  */
  91   _RLIMIT_MEMLOCK = RLIMIT_MEMLOCK,
  92 #undef RLIMIT_MEMLOCK
  93   RLIMIT_MEMLOCK = _RLIMIT_MEMLOCK,
  94 #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK
  95
  96   RLIMIT_NLIMITS = RLIM_NLIMITS,
  97 #undef RLIM_NLIMITS
  98   RLIM_NLIMITS = RLIMIT_NLIMITS,
  99 #define RLIMIT_NLIMITS RLIMIT_NLIMITS
 100 #define RLIM_NLIMITS RLIM_NLIMITS
 101
 102   /* Value to indicate that there is no limit.  */
 103   RLIM_INFINITY = (long int)(~0UL >> 1)
 104 #define RLIM_INFINITY RLIM_INFINITY
 105 };
 106
 107 /* Type for resource quantity measurement.  */
 108 #ifndef __USE_FILE_OFFSET64
 109 typedef __rlim_t rlim_t;
 110 #else
 111 typedef __rlim64_t rlim_t;
 112 #endif
 113 #ifdef __USE_LARGEFILE64
 114 typedef __rlim64_t rlim64_t;
 115 #endif
 116
 117 struct rlimit
 118   {
 119     /* The current (soft) limit.  */
 120     rlim_t rlim_cur;
 121     /* The hard limit.  */
 122     rlim_t rlim_max;
 123   };
 124
 125 #ifdef __USE_LARGEFILE64
 126 struct rlimit64
 127   {
 128     /* The current (soft) limit.  */
 129     rlim64_t rlim_cur;
 130     /* The hard limit.  */
 131     rlim64_t rlim_max;
 132  };
 133 #endif
 134
 135 /* Whose usage statistics do you want?  */
 136 enum __rusage_who
 137 {
 138   /* The calling process.  */
 139   RUSAGE_SELF = 0,
 140 #define RUSAGE_SELF RUSAGE_SELF
 141
 142   /* All of its terminated child processes.  */
 143   RUSAGE_CHILDREN = -1,
 144 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
 145
 146   /* Both.  */
 147   RUSAGE_BOTH = -2
 148 #define RUSAGE_BOTH RUSAGE_BOTH
 149 };
 150
 151 #include <sys/time.h>           /* For `struct timeval'.  */
 152
 153 /* Structure which says how much of each resource has been used.  */
 154 struct rusage
 155   {
 156     /* Total amount of user time used.  */
 157     struct timeval ru_utime;
 158     /* Total amount of system time used.  */
 159     struct timeval ru_stime;
 160     /* Maximum resident set size (in kilobytes).  */
 161     long int ru_maxrss;
 162     /* Amount of sharing of text segment memory
 163        with other processes (kilobyte-seconds).  */
 164     long int ru_ixrss;
 165     /* Amount of data segment memory used (kilobyte-seconds).  */
 166     long int ru_idrss;
 167     /* Amount of stack memory used (kilobyte-seconds).  */
 168     long int ru_isrss;
 169     /* Number of soft page faults (i.e. those serviced by reclaiming
 170        a page from the list of pages awaiting reallocation.  */
 171     long int ru_minflt;
 172     /* Number of hard page faults (i.e. those that required I/O).  */
 173     long int ru_majflt;
 174     /* Number of times a process was swapped out of physical memory.  */
 175     long int ru_nswap;
 176     /* Number of input operations via the file system.  Note: This
 177        and `ru_oublock' do not include operations with the cache.  */
 178     long int ru_inblock;
 179     /* Number of output operations via the file system.  */
 180     long int ru_oublock;
 181     /* Number of IPC messages sent.  */
 182     long int ru_msgsnd;
 183     /* Number of IPC messages received.  */
 184     long int ru_msgrcv;
 185     /* Number of signals delivered.  */
 186     long int ru_nsignals;
 187     /* Number of voluntary context switches, i.e. because the process
 188        gave up the process before it had to (usually to wait for some
 189        resource to be available).  */
 190     long int ru_nvcsw;
 191     /* Number of involuntary context switches, i.e. a higher priority process
 192        became runnable or the current process used up its time slice.  */
 193     long int ru_nivcsw;
 194   };
 195
 196 /* Priority limits.  */
 197 #define PRIO_MIN        -20     /* Minimum priority a process can have.  */
 198 #define PRIO_MAX        20      /* Maximum priority a process can have.  */
 199
 200 /* The type of the WHICH argument to `getpriority' and `setpriority',
 201    indicating what flavor of entity the WHO argument specifies.  */
 202 enum __priority_which
 203 {
 204   PRIO_PROCESS = 0,             /* WHO is a process ID.  */
 205   PRIO_PGRP = 1,                /* WHO is a process group ID.  */
 206   PRIO_USER = 2                 /* WHO is a user ID.  */
 207 };