sysdeps/unix/sysv/linux/resourcebits.h

   1 /* Bit values & structures for resource limits.  Linux version.
   2    Copyright (C) 1994, 1996 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
  22 /* Transmute defines to enumerations.  The macro re-definitions are
  23    necessary because some programs want to test for operating system
  24    features with #ifdef RUSAGE_SELF.  In ISO C the reflexive
  25    definition is a no-op.  */
  26
  27 /* Kinds of resource limit.  */
  28 enum __rlimit_resource
  29 {
  30   /* Per-process CPU limit, in seconds.  */
  31   _RLIMIT_CPU = RLIMIT_CPU,
  32 #undef RLIMIT_CPU
  33   RLIMIT_CPU = _RLIMIT_CPU,
  34 #define RLIMIT_CPU RLIMIT_CPU
  35
  36   /* Largest file that can be created, in bytes.  */
  37   _RLIMIT_FSIZE = RLIMIT_FSIZE,
  38 #undef RLIMIT_FSIZE
  39   RLIMIT_FSIZE = _RLIMIT_FSIZE,
  40 #define RLIMIT_FSIZE RLIMIT_FSIZE
  41
  42   /* Maximum size of data segment, in bytes.  */
  43   _RLIMIT_DATA = RLIMIT_DATA,
  44 #undef RLIMIT_DATA
  45   RLIMIT_DATA = _RLIMIT_DATA,
  46 #define RLIMIT_DATA RLIMIT_DATA
  47
  48   /* Maximum size of stack segment, in bytes.  */
  49   _RLIMIT_STACK = RLIMIT_STACK,
  50 #undef RLIMIT_STACK
  51   RLIMIT_STACK = _RLIMIT_STACK,
  52 #define RLIMIT_STACK RLIMIT_STACK
  53
  54   /* Largest core file that can be created, in bytes.  */
  55   _RLIMIT_CORE = RLIMIT_CORE,
  56 #undef RLIMIT_CORE
  57   RLIMIT_CORE = _RLIMIT_CORE,
  58 #define RLIMIT_CORE RLIMIT_CORE
  59
  60   /* Largest resident set size, in bytes.
  61      This affects swapping; processes that are exceeding their
  62      resident set size will be more likely to have physical memory
  63      taken from them.  */
  64   _RLIMIT_RSS = RLIMIT_RSS,
  65 #undef RLIMIT_RSS
  66   RLIMIT_RSS = _RLIMIT_RSS,
  67 #define RLIMIT_RSS RLIMIT_RSS
  68
  69   /* Number of open files.  */
  70   _RLIMIT_NOFILE = RLIMIT_NOFILE,
  71 #undef RLIMIT_NOFILE
  72   RLIMIT_NOFILE = _RLIMIT_NOFILE,
  73   RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same.  */
  74 #define RLIMIT_NOFILE RLIMIT_NOFILE
  75 #define RLIMIT_OFILE RLIMIT_OFILE
  76
  77   /* Address space limit (?) */
  78   _RLIMIT_AS = RLIMIT_AS,
  79 #undef RLIMIT_AS
  80   RLIMIT_AS = _RLIMIT_AS,
  81 #define RLIMIT_AS RLIMIT_AS
  82
  83   /* Number of processes.  */
  84   _RLIMIT_NPROC = RLIMIT_NPROC,
  85 #undef RLIMIT_NPROC
  86   RLIMIT_NPROC = _RLIMIT_NPROC,
  87 #define RLIMIT_NPROC RLIMIT_NPROC
  88
  89   /* Locked-in-memory address space.  */
  90   _RLIMIT_MEMLOCK = RLIMIT_MEMLOCK,
  91 #undef RLIMIT_MEMLOCK
  92   RLIMIT_MEMLOCK = _RLIMIT_MEMLOCK,
  93 #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK
  94
  95   RLIMIT_NLIMITS = RLIM_NLIMITS,
  96 #undef RLIM_NLIMITS
  97   RLIM_NLIMITS = RLIMIT_NLIMITS,
  98 #define RLIMIT_NLIMITS RLIMIT_NLIMITS
  99 #define RLIM_NLIMITS RLIM_NLIMITS
 100
 101   /* Value to indicate that there is no limit.  */
 102   RLIM_INFINITY = (long int)(~0UL >> 1)
 103 #define RLIM_INFINITY RLIM_INFINITY
 104 };
 105
 106 struct rlimit
 107 {
 108   /* The current (soft) limit.  */
 109   long int rlim_cur;
 110   /* The hard limit.  */
 111   long int rlim_max;
 112 };
 113
 114 /* Whose usage statistics do you want?  */
 115 enum __rusage_who
 116 {
 117   /* The calling process.  */
 118   RUSAGE_SELF = 0,
 119 #define RUSAGE_SELF RUSAGE_SELF
 120
 121   /* All of its terminated child processes.  */
 122   RUSAGE_CHILDREN = -1,
 123 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
 124
 125   /* Both.  */
 126   RUSAGE_BOTH = -2
 127 #define RUSAGE_BOTH RUSAGE_BOTH
 128 };
 129
 130 #include <sys/time.h>           /* For `struct timeval'.  */
 131
 132 /* Structure which says how much of each resource has been used.  */
 133 struct rusage
 134 {
 135   /* Total amount of user time used.  */
 136   struct timeval ru_utime;
 137   /* Total amount of system time used.  */
 138   struct timeval ru_stime;
 139   /* Maximum resident set size (in kilobytes).  */
 140   long int ru_maxrss;
 141   /* Amount of sharing of text segment memory
 142      with other processes (kilobyte-seconds).  */
 143   long int ru_ixrss;
 144   /* Amount of data segment memory used (kilobyte-seconds).  */
 145   long int ru_idrss;
 146   /* Amount of stack memory used (kilobyte-seconds).  */
 147   long int ru_isrss;
 148   /* Number of soft page faults (i.e. those serviced by reclaiming
 149      a page from the list of pages awaiting reallocation.  */
 150   long int ru_minflt;
 151   /* Number of hard page faults (i.e. those that required I/O).  */
 152   long int ru_majflt;
 153   /* Number of times a process was swapped out of physical memory.  */
 154   long int ru_nswap;
 155   /* Number of input operations via the file system.  Note: This
 156      and `ru_oublock' do not include operations with the cache.  */
 157   long int ru_inblock;
 158   /* Number of output operations via the file system.  */
 159   long int ru_oublock;
 160   /* Number of IPC messages sent.  */
 161   long int ru_msgsnd;
 162   /* Number of IPC messages received.  */
 163   long int ru_msgrcv;
 164   /* Number of signals delivered.  */
 165   long int ru_nsignals;
 166   /* Number of voluntary context switches, i.e. because the process
 167      gave up the process before it had to (usually to wait for some
 168      resource to be available).  */
 169   long int ru_nvcsw;
 170   /* Number of involuntary context switches, i.e. a higher priority process
 171      became runnable or the current process used up its time slice.  */
 172   long int ru_nivcsw;
 173 };
 174
 175 /* Priority limits.  */
 176 #define PRIO_MIN        -20     /* Minimum priority a process can have.  */
 177 #define PRIO_MAX        20      /* Maximum priority a process can have.  */
 178
 179 /* The type of the WHICH argument to `getpriority' and `setpriority',
 180    indicating what flavor of entity the WHO argument specifies.  */
 181 enum __priority_which
 182 {
 183   PRIO_PROCESS = 0,             /* WHO is a process ID.  */
 184   PRIO_PGRP = 1,                /* WHO is a process group ID.  */
 185   PRIO_USER = 2                 /* WHO is a user ID.  */
 186 };