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a66bc30d6b
Some older standards (XPG4.2 through POSIX.1:2001, XSI only) require sys/wait.h to include the definition of struct rusage. This is missing in glibc. This patch adds the required definition. struct rusage is moved to a new header bits/types/struct_rusage.h to avoid bringing in the whole of sys/resource.h (although the standards in question do allow the whole of sys/resource.h to be brought in). In the five bits/resource.h headers, the only variation between the definitions of struct rusage is that the sysdeps/unix/sysv/linux version is prepared for x32 (by having anonymous unions with __syscall_slong_t fields) and the others are not. Thus, this version is suitable for use generically (everything other than x32 simply has __syscall_slong_t the same as long int, so there are no API or ABI changes involved, and anonymous unions are already a required language feature for glibc headers elsewhere), and this patch uses it as a base for the single implementation of bits/types/struct_rusage.h. Tested for x86_64, and with build-many-glibcs.py. [BZ #21575] * resource/bits/types/struct_rusage.h: New file. * include/bits/types/struct_rusage.h: Likewise. * bits/resource.h (struct rusage): Include <bits/types/struct_rusage.h> instead of defining here. * sysdeps/unix/sysv/linux/bits/resource.h (struct rusage): Likewise. * sysdeps/unix/sysv/linux/alpha/bits/resource.h (struct rusage): Likewise. * sysdeps/unix/sysv/linux/mips/bits/resource.h (struct rusage): Likewise. * sysdeps/unix/sysv/linux/sparc/bits/resource.h (struct rusage): Likewise. * resource/Makefile (headers): Add bits/types/struct_rusage.h. * posix/sys/wait.h [__USE_XOPEN_EXTENDED && !__USE_XOPEN2K8]: Include <bits/types/struct_rusage.h>
224 lines
6.2 KiB
C
224 lines
6.2 KiB
C
/* Bit values & structures for resource limits. Linux version.
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Copyright (C) 1994-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_RESOURCE_H
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# error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
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#endif
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#include <bits/types.h>
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/* Transmute defines to enumerations. The macro re-definitions are
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necessary because some programs want to test for operating system
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features with #ifdef RUSAGE_SELF. In ISO C the reflexive
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definition is a no-op. */
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/* Kinds of resource limit. */
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enum __rlimit_resource
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{
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/* Per-process CPU limit, in seconds. */
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RLIMIT_CPU = 0,
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#define RLIMIT_CPU RLIMIT_CPU
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/* Largest file that can be created, in bytes. */
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RLIMIT_FSIZE = 1,
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#define RLIMIT_FSIZE RLIMIT_FSIZE
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/* Maximum size of data segment, in bytes. */
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RLIMIT_DATA = 2,
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#define RLIMIT_DATA RLIMIT_DATA
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/* Maximum size of stack segment, in bytes. */
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RLIMIT_STACK = 3,
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#define RLIMIT_STACK RLIMIT_STACK
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/* Largest core file that can be created, in bytes. */
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RLIMIT_CORE = 4,
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#define RLIMIT_CORE RLIMIT_CORE
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/* Largest resident set size, in bytes.
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This affects swapping; processes that are exceeding their
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resident set size will be more likely to have physical memory
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taken from them. */
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__RLIMIT_RSS = 5,
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#define RLIMIT_RSS __RLIMIT_RSS
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/* Number of open files. */
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RLIMIT_NOFILE = 7,
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__RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
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#define RLIMIT_NOFILE RLIMIT_NOFILE
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#define RLIMIT_OFILE __RLIMIT_OFILE
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/* Address space limit. */
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RLIMIT_AS = 9,
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#define RLIMIT_AS RLIMIT_AS
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/* Number of processes. */
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__RLIMIT_NPROC = 6,
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#define RLIMIT_NPROC __RLIMIT_NPROC
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/* Locked-in-memory address space. */
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__RLIMIT_MEMLOCK = 8,
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#define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK
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/* Maximum number of file locks. */
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__RLIMIT_LOCKS = 10,
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#define RLIMIT_LOCKS __RLIMIT_LOCKS
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/* Maximum number of pending signals. */
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__RLIMIT_SIGPENDING = 11,
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#define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING
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/* Maximum bytes in POSIX message queues. */
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__RLIMIT_MSGQUEUE = 12,
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#define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE
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/* Maximum nice priority allowed to raise to.
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Nice levels 19 .. -20 correspond to 0 .. 39
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values of this resource limit. */
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__RLIMIT_NICE = 13,
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#define RLIMIT_NICE __RLIMIT_NICE
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/* Maximum realtime priority allowed for non-priviledged
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processes. */
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__RLIMIT_RTPRIO = 14,
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#define RLIMIT_RTPRIO __RLIMIT_RTPRIO
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/* Maximum CPU time in µs that a process scheduled under a real-time
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scheduling policy may consume without making a blocking system
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call before being forcibly descheduled. */
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__RLIMIT_RTTIME = 15,
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#define RLIMIT_RTTIME __RLIMIT_RTTIME
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__RLIMIT_NLIMITS = 16,
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__RLIM_NLIMITS = __RLIMIT_NLIMITS
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#define RLIMIT_NLIMITS __RLIMIT_NLIMITS
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#define RLIM_NLIMITS __RLIM_NLIMITS
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};
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/* Value to indicate that there is no limit. */
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#ifndef __USE_FILE_OFFSET64
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# define RLIM_INFINITY ((__rlim_t) -1)
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#else
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# define RLIM_INFINITY 0xffffffffffffffffuLL
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#endif
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#ifdef __USE_LARGEFILE64
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# define RLIM64_INFINITY 0xffffffffffffffffuLL
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#endif
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/* We can represent all limits. */
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#define RLIM_SAVED_MAX RLIM_INFINITY
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#define RLIM_SAVED_CUR RLIM_INFINITY
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/* Type for resource quantity measurement. */
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#ifndef __USE_FILE_OFFSET64
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typedef __rlim_t rlim_t;
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#else
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typedef __rlim64_t rlim_t;
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#endif
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#ifdef __USE_LARGEFILE64
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typedef __rlim64_t rlim64_t;
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#endif
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struct rlimit
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{
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/* The current (soft) limit. */
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rlim_t rlim_cur;
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/* The hard limit. */
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rlim_t rlim_max;
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};
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#ifdef __USE_LARGEFILE64
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struct rlimit64
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{
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/* The current (soft) limit. */
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rlim64_t rlim_cur;
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/* The hard limit. */
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rlim64_t rlim_max;
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};
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#endif
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/* Whose usage statistics do you want? */
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enum __rusage_who
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{
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/* The calling process. */
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RUSAGE_SELF = 0,
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#define RUSAGE_SELF RUSAGE_SELF
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/* All of its terminated child processes. */
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RUSAGE_CHILDREN = -1
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#define RUSAGE_CHILDREN RUSAGE_CHILDREN
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#ifdef __USE_GNU
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,
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/* The calling thread. */
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RUSAGE_THREAD = 1
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# define RUSAGE_THREAD RUSAGE_THREAD
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/* Name for the same functionality on Solaris. */
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# define RUSAGE_LWP RUSAGE_THREAD
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#endif
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};
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#include <bits/types/struct_timeval.h>
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#include <bits/types/struct_rusage.h>
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/* Priority limits. */
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#define PRIO_MIN -20 /* Minimum priority a process can have. */
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#define PRIO_MAX 20 /* Maximum priority a process can have. */
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/* The type of the WHICH argument to `getpriority' and `setpriority',
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indicating what flavor of entity the WHO argument specifies. */
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enum __priority_which
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{
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PRIO_PROCESS = 0, /* WHO is a process ID. */
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#define PRIO_PROCESS PRIO_PROCESS
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PRIO_PGRP = 1, /* WHO is a process group ID. */
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#define PRIO_PGRP PRIO_PGRP
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PRIO_USER = 2 /* WHO is a user ID. */
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#define PRIO_USER PRIO_USER
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};
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__BEGIN_DECLS
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#ifdef __USE_GNU
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/* Modify and return resource limits of a process atomically. */
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# ifndef __USE_FILE_OFFSET64
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extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource,
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const struct rlimit *__new_limit,
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struct rlimit *__old_limit) __THROW;
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# else
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# ifdef __REDIRECT_NTH
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extern int __REDIRECT_NTH (prlimit, (__pid_t __pid,
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enum __rlimit_resource __resource,
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const struct rlimit *__new_limit,
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struct rlimit *__old_limit), prlimit64);
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# else
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# define prlimit prlimit64
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# endif
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# endif
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# ifdef __USE_LARGEFILE64
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extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource,
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const struct rlimit64 *__new_limit,
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struct rlimit64 *__old_limit) __THROW;
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# endif
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#endif
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__END_DECLS
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