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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
103 lines
4.4 KiB
C
103 lines
4.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/runtime/sysconf.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/rlimit.h"
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#include "libc/calls/struct/sysinfo.h"
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#include "libc/calls/struct/sysinfo.internal.h"
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#include "libc/dce.h"
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#include "libc/limits.h"
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#include "libc/macros.internal.h"
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#include "libc/runtime/clktck.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/sysconf.h"
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#include "libc/sysv/consts/_posix.h"
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#include "libc/sysv/consts/limits.h"
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#include "libc/sysv/consts/rlimit.h"
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#include "libc/sysv/consts/ss.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/thread/thread.h"
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/**
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* Returns configuration value about system.
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*
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* The following parameters are supported:
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*
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* - `_SC_CLK_TCK` returns number of clock ticks per second
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* - `_SC_ARG_MAX` will perform expensive rlimit calculations
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* - `_SC_SIGSTKSZ` returns host platform's preferred SIGSTKSZ
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* - `_SC_MINSIGSTKSZ` returns host platform's required MINSIGSTKSZ
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* - `_SC_PAGESIZE` currently always returns 65536 due to Windows
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* - `_SC_AVPHYS_PAGES` returns average physical memory pages
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* - `_SC_PHYS_PAGES` returns physical memory pages available
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* - `_SC_NPROCESSORS_ONLN` returns number of effective CPUs
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* - `_SC_CHILD_MAX` returns maximum number of processes
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* - `_SC_OPEN_MAX` returns maximum number of open files
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*
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* @return value on success, or -1 w/ errno
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* @raise EINVAL if `name` isn't valid
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*/
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long sysconf(int name) {
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switch (name) {
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case _SC_CLK_TCK:
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return CLK_TCK;
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case _SC_PAGESIZE:
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return FRAMESIZE;
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case _SC_ARG_MAX:
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return __get_arg_max();
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case _SC_SIGSTKSZ:
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return _SIGSTKSZ;
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case _SC_MINSIGSTKSZ:
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return __get_minsigstksz();
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case _SC_CHILD_MAX:
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return __get_rlimit(RLIMIT_NPROC);
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case _SC_OPEN_MAX:
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return __get_rlimit(RLIMIT_NOFILE);
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case _SC_NPROCESSORS_CONF:
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case _SC_NPROCESSORS_ONLN:
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return __get_cpu_count();
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case _SC_PHYS_PAGES:
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return __get_phys_pages();
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case _SC_AVPHYS_PAGES:
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return __get_avphys_pages();
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case _SC_THREADS:
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return _POSIX_THREADS;
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case _SC_THREAD_DESTRUCTOR_ITERATIONS:
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return PTHREAD_DESTRUCTOR_ITERATIONS;
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case _SC_THREAD_KEYS_MAX:
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return PTHREAD_KEYS_MAX;
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case _SC_THREAD_STACK_MIN:
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return PTHREAD_STACK_MIN;
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case _SC_THREAD_THREADS_MAX:
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return LONG_MAX;
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case _SC_LINE_MAX:
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return _POSIX2_LINE_MAX;
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case _SC_MONOTONIC_CLOCK:
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return _POSIX_MONOTONIC_CLOCK;
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case _SC_HOST_NAME_MAX:
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return _POSIX_HOST_NAME_MAX;
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case _SC_SPAWN:
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return _POSIX_SPAWN;
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case _SC_SYMLOOP_MAX:
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return _POSIX_SYMLOOP_MAX;
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default:
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return einval();
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}
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}
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