/* Bit values & structures for resource limits. 4.4 BSD/generic GNU version. Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _SYS_RESOURCE_H # error "Never use directly; include instead." #endif #include /* These are the values for 4.4 BSD and GNU. Earlier BSD systems have a subset of these kinds of resource limit. In systems where `getrlimit' and `setrlimit' are not system calls, these are the values used by the C library to emulate them. */ /* Kinds of resource limit. */ enum __rlimit_resource { /* Per-process CPU limit, in seconds. */ RLIMIT_CPU, #define RLIMIT_CPU RLIMIT_CPU /* Largest file that can be created, in bytes. */ RLIMIT_FSIZE, #define RLIMIT_FSIZE RLIMIT_FSIZE /* Maximum size of data segment, in bytes. */ RLIMIT_DATA, #define RLIMIT_DATA RLIMIT_DATA /* Maximum size of stack segment, in bytes. */ RLIMIT_STACK, #define RLIMIT_STACK RLIMIT_STACK /* Largest core file that can be created, in bytes. */ RLIMIT_CORE, #define RLIMIT_CORE RLIMIT_CORE /* Largest resident set size, in bytes. This affects swapping; processes that are exceeding their resident set size will be more likely to have physical memory taken from them. */ RLIMIT_RSS, #define RLIMIT_RSS RLIMIT_RSS /* Locked-in-memory address space. */ RLIMIT_MEMLOCK, #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK /* Number of processes. */ RLIMIT_NPROC, #define RLIMIT_NPROC RLIMIT_NPROC /* Number of open files. */ RLIMIT_OFILE, RLIMIT_NOFILE = RLIMIT_OFILE, /* Another name for the same thing. */ #define RLIMIT_OFILE RLIMIT_OFILE #define RLIMIT_NOFILE RLIMIT_NOFILE RLIMIT_NLIMITS, /* Number of limit flavors. */ RLIM_NLIMITS = RLIMIT_NLIMITS /* Traditional name for same. */ }; /* Value to indicate that there is no limit. */ #ifndef __USE_FILE_OFFSET64 # define RLIM_INFINITY 0x7fffffff #else # define RLIM_INFINITY 0x7fffffffffffffffLL #endif #ifdef __USE_LARGEFILE64 # define RLIM64_INFINITY 0x7fffffffffffffffLL #endif /* Type for resource quantity measurement. */ #ifndef __USE_FILE_OFFSET64 typedef __rlim_t rlim_t; #else typedef __rlim64_t rlim_t; #endif #ifdef __USE_LARGEFILE64 typedef __rlim64_t rlim64_t; #endif struct rlimit { /* The current (soft) limit. */ rlim_t rlim_cur; /* The hard limit. */ rlim_t rlim_max; }; #ifdef __USE_LARGEFILE64 struct rlimit64 { /* The current (soft) limit. */ rlim64_t rlim_cur; /* The hard limit. */ rlim64_t rlim_max; }; #endif /* Whose usage statistics do you want? */ enum __rusage_who /* The macro definitions are necessary because some programs want to test for operating system features with #ifdef RUSAGE_SELF. In ISO C the reflexive definition is a no-op. */ { /* The calling process. */ RUSAGE_SELF = 0, #define RUSAGE_SELF RUSAGE_SELF /* All of its terminated child processes. */ RUSAGE_CHILDREN = -1 #define RUSAGE_CHILDREN RUSAGE_CHILDREN }; #define __need_timeval #include /* For `struct timeval'. */ /* Structure which says how much of each resource has been used. */ struct rusage { /* Total amount of user time used. */ struct timeval ru_utime; /* Total amount of system time used. */ struct timeval ru_stime; /* Maximum resident set size (in kilobytes). */ long int ru_maxrss; /* Amount of sharing of text segment memory with other processes (kilobyte-seconds). */ long int ru_ixrss; /* Amount of data segment memory used (kilobyte-seconds). */ long int ru_idrss; /* Amount of stack memory used (kilobyte-seconds). */ long int ru_isrss; /* Number of soft page faults (i.e. those serviced by reclaiming a page from the list of pages awaiting reallocation. */ long int ru_minflt; /* Number of hard page faults (i.e. those that required I/O). */ long int ru_majflt; /* Number of times a process was swapped out of physical memory. */ long int ru_nswap; /* Number of input operations via the file system. Note: This and `ru_oublock' do not include operations with the cache. */ long int ru_inblock; /* Number of output operations via the file system. */ long int ru_oublock; /* Number of IPC messages sent. */ long int ru_msgsnd; /* Number of IPC messages received. */ long int ru_msgrcv; /* Number of signals delivered. */ long int ru_nsignals; /* Number of voluntary context switches, i.e. because the process gave up the process before it had to (usually to wait for some resource to be available). */ long int ru_nvcsw; /* Number of involuntary context switches, i.e. a higher priority process became runnable or the current process used up its time slice. */ long int ru_nivcsw; }; /* Priority limits. */ #define PRIO_MIN -20 /* Minimum priority a process can have. */ #define PRIO_MAX 20 /* Maximum priority a process can have. */ /* The type of the WHICH argument to `getpriority' and `setpriority', indicating what flavor of entity the WHO argument specifies. */ enum __priority_which { PRIO_PROCESS = 0, /* WHO is a process ID. */ PRIO_PGRP = 1, /* WHO is a process group ID. */ PRIO_USER = 2 /* WHO is a user ID. */ };