1 /* Bit values & structures for resource limits. 4.4 BSD/generic GNU version.
2 Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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. */
20 #ifndef _SYS_RESOURCE_H
21 # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
24 /* These are the values for 4.4 BSD and GNU. Earlier BSD systems have a
25 subset of these kinds of resource limit. In systems where `getrlimit'
26 and `setrlimit' are not system calls, these are the values used by the C
27 library to emulate them. */
29 /* Kinds of resource limit. */
30 enum __rlimit_resource
32 /* Per-process CPU limit, in seconds. */
34 #define RLIMIT_CPU RLIMIT_CPU
35 /* Largest file that can be created, in bytes. */
37 #define RLIMIT_FSIZE RLIMIT_FSIZE
38 /* Maximum size of data segment, in bytes. */
40 #define RLIMIT_DATA RLIMIT_DATA
41 /* Maximum size of stack segment, in bytes. */
43 #define RLIMIT_STACK RLIMIT_STACK
44 /* Largest core file that can be created, in bytes. */
46 #define RLIMIT_CORE RLIMIT_CORE
47 /* Largest resident set size, in bytes.
48 This affects swapping; processes that are exceeding their
49 resident set size will be more likely to have physical memory
52 #define RLIMIT_RSS RLIMIT_RSS
53 /* Locked-in-memory address space. */
55 #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK
56 /* Number of processes. */
58 #define RLIMIT_NPROC RLIMIT_NPROC
59 /* Number of open files. */
61 RLIMIT_NOFILE = RLIMIT_OFILE, /* Another name for the same thing. */
62 #define RLIMIT_OFILE RLIMIT_OFILE
63 #define RLIMIT_NOFILE RLIMIT_NOFILE
65 RLIMIT_NLIMITS, /* Number of limit flavors. */
66 RLIM_NLIMITS = RLIMIT_NLIMITS, /* Traditional name for same. */
68 RLIM_INFINITY = 0x7fffffff /* Value to indicate that there is no limit. */
69 #define RLIM_INFINITY RLIM_INFINITY
72 /* Type for resource quantity measurement. */
73 #ifndef __USE_FILE_OFFSET64
74 typedef __rlim_t rlim_t;
76 typedef __rlim64_t rlim_t;
78 #ifdef __USE_LARGEFILE64
79 typedef __rlim64_t rlim64_t;
84 /* The current (soft) limit. */
90 #ifdef __USE_LARGEFILE64
93 /* The current (soft) limit. */
100 /* Whose usage statistics do you want? */
102 /* The macro definitions are necessary because some programs want
103 to test for operating system features with #ifdef RUSAGE_SELF.
104 In ISO C the reflexive definition is a no-op. */
106 /* The calling process. */
108 #define RUSAGE_SELF RUSAGE_SELF
109 /* All of its terminated child processes. */
111 #define RUSAGE_CHILDREN RUSAGE_CHILDREN
114 #define __need_timeval
115 #include <bits/time.h> /* For `struct timeval'. */
117 /* Structure which says how much of each resource has been used. */
120 /* Total amount of user time used. */
121 struct timeval ru_utime;
122 /* Total amount of system time used. */
123 struct timeval ru_stime;
124 /* Maximum resident set size (in kilobytes). */
126 /* Amount of sharing of text segment memory
127 with other processes (kilobyte-seconds). */
129 /* Amount of data segment memory used (kilobyte-seconds). */
131 /* Amount of stack memory used (kilobyte-seconds). */
133 /* Number of soft page faults (i.e. those serviced by reclaiming
134 a page from the list of pages awaiting reallocation. */
136 /* Number of hard page faults (i.e. those that required I/O). */
138 /* Number of times a process was swapped out of physical memory. */
140 /* Number of input operations via the file system. Note: This
141 and `ru_oublock' do not include operations with the cache. */
143 /* Number of output operations via the file system. */
145 /* Number of IPC messages sent. */
147 /* Number of IPC messages received. */
149 /* Number of signals delivered. */
150 long int ru_nsignals;
151 /* Number of voluntary context switches, i.e. because the process
152 gave up the process before it had to (usually to wait for some
153 resource to be available). */
155 /* Number of involuntary context switches, i.e. a higher priority process
156 became runnable or the current process used up its time slice. */
160 /* Priority limits. */
161 #define PRIO_MIN -20 /* Minimum priority a process can have. */
162 #define PRIO_MAX 20 /* Maximum priority a process can have. */
164 /* The type of the WHICH argument to `getpriority' and `setpriority',
165 indicating what flavor of entity the WHO argument specifies. */
166 enum __priority_which
168 PRIO_PROCESS = 0, /* WHO is a process ID. */
169 PRIO_PGRP = 1, /* WHO is a process group ID. */
170 PRIO_USER = 2 /* WHO is a user ID. */