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- /* Copyright (C) 1992, 1994 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 Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #ifndef _SYS_RESOURCE_H
-
- #define _SYS_RESOURCE_H 1
- #include <features.h>
-
- __BEGIN_DECLS
-
- /* Get the system-dependent definitions of RLIM_*. */
- #include <resourcebits.h>
-
- struct rlimit
- {
- /* The current (soft) limit. */
- int rlim_cur;
- /* The hard limit. */
- int rlim_max;
- };
-
- /* Value used to indicate that there is no limit. */
- #define RLIM_INFINITY 0x7fffffff
-
- /* Put the soft and hard limits for RESOURCE in *RLIMITS.
- Returns 0 if successful, -1 if not (and sets errno). */
- int getrlimit __P ((enum __rlimit_resource __resource,
- struct rlimit * __rlimits));
-
- /* Set the soft and hard limits for RESOURCE to *RLIMITS.
- Only the super-user can increase hard limits.
- Return 0 if successful, -1 if not (and sets errno). */
- int setrlimit __P ((enum __rlimit_resource __resource,
- struct rlimit * __rlimits));
-
-
- /* 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 ANSI 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
- };
-
- #include <sys/time.h> /* 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 ru_maxrss;
- /* Amount of sharing of text segment memory
- with other processes (kilobyte-seconds). */
- long ru_ixrss;
- /* Amount of data segment memory used (kilobyte-seconds). */
- long ru_idrss;
- /* Amount of stack memory used (kilobyte-seconds). */
- long ru_isrss;
- /* Number of soft page faults (i.e. those serviced by reclaiming
- a page from the list of pages awaiting reallocation. */
- long ru_minflt;
- /* Number of hard page faults (i.e. those that required I/O). */
- long ru_majflt;
- /* Number of times a process was swapped out of physical memory. */
- long ru_nswap;
- /* Number of input operations via the file system. Note: This
- and `ru_oublock' do not include operations with the cache. */
- long ru_inblock;
- /* Number of output operations via the file system. */
- long ru_oublock;
- /* Number of IPC messages sent. */
- long ru_msgsnd;
- /* Number of IPC messages received. */
- long ru_msgrcv;
- /* Number of signals delivered. */
- long 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 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 ru_nivcsw;
- };
-
- /* Return resource usage information on process indicated by WHO
- and put it in *USAGE. Returns 0 for success, -1 for failure. */
- int __getrusage __P ((enum __rusage_who __who, struct rusage * __usage));
- int getrusage __P ((enum __rusage_who __who, struct rusage * __usage));
-
- /* Function depends on CMD:
- 1 = Return the limit on the size of a file, in units of 512 bytes.
- 2 = Set the limit on the size of a file to NEWLIMIT. Only the
- super-user can increase the limit.
- 3 = Return the maximum possible address of the data segment.
- 4 = Return the maximum number of files that the calling process can open.
- Returns -1 on errors. */
- long int __ulimit __P ((int __cmd, long int __newlimit));
- long int ulimit __P ((int __cmd, long int __newlimit));
-
-
- /* 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. */
- };
-
- /* Return the highest priority of any process specified by WHICH and WHO
- (see above); if WHO is zero, the current process, process group, or user
- (as specified by WHO) is used. A lower priority number means higher
- priority. Priorities range from PRIO_MIN to PRIO_MAX (above). */
- extern int getpriority __P ((enum __priority_which __which, int __who));
-
- /* Set the priority of all processes specified by WHICH and WHO (see above)
- to PRIO. Returns 0 on success, -1 on errors. */
- extern int setpriority __P ((enum __priority_which __which, int __who,
- int __prio));
-
-
- __END_DECLS
-
- #endif /* resource.h */
-