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https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-27 20:49:04 +00:00
aca7dd3961
As it's impossible to get the current umask without modifying it at the same time, initialize the current umask at the program start and keep the loaded value internally. Add isc_os_umask() function to access the starttime umask.
114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <inttypes.h>
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#include <sys/stat.h>
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#include <isc/os.h>
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#include <isc/types.h>
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#include <isc/util.h>
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#include "os_p.h"
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static unsigned int isc__os_ncpus = 0;
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static unsigned long isc__os_cacheline = ISC_OS_CACHELINE_SIZE;
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static mode_t isc__os_umask = 0;
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#ifdef HAVE_SYSCONF
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#include <unistd.h>
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static long
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sysconf_ncpus(void) {
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#if defined(_SC_NPROCESSORS_ONLN)
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return (sysconf((_SC_NPROCESSORS_ONLN)));
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#elif defined(_SC_NPROC_ONLN)
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return (sysconf((_SC_NPROC_ONLN)));
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#else /* if defined(_SC_NPROCESSORS_ONLN) */
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return (0);
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#endif /* if defined(_SC_NPROCESSORS_ONLN) */
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}
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#endif /* HAVE_SYSCONF */
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#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
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#include <sys/param.h> /* for NetBSD */
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#include <sys/sysctl.h>
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#include <sys/types.h> /* for FreeBSD */
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static int
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sysctl_ncpus(void) {
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int ncpu, result;
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size_t len;
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len = sizeof(ncpu);
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result = sysctlbyname("hw.ncpu", &ncpu, &len, 0, 0);
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if (result != -1) {
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return (ncpu);
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}
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return (0);
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}
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#endif /* if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) */
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static void
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ncpus_initialize(void) {
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#if defined(HAVE_SYSCONF)
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isc__os_ncpus = sysconf_ncpus();
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#endif /* if defined(HAVE_SYSCONF) */
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#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
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if (isc__os_ncpus <= 0) {
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isc__os_ncpus = sysctl_ncpus();
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}
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#endif /* if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) */
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if (isc__os_ncpus == 0) {
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isc__os_ncpus = 1;
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}
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}
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static void
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umask_initialize(void) {
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isc__os_umask = umask(0);
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(void)umask(isc__os_umask);
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}
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unsigned int
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isc_os_ncpus(void) {
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return (isc__os_ncpus);
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}
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unsigned long
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isc_os_cacheline(void) {
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return (isc__os_cacheline);
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}
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mode_t
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isc_os_umask(void) {
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return (isc__os_umask);
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}
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void
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isc__os_initialize(void) {
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umask_initialize();
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ncpus_initialize();
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#if defined(HAVE_SYSCONF) && defined(_SC_LEVEL1_DCACHE_LINESIZE)
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long s = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
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if (s > 0 && (unsigned long)s > isc__os_cacheline) {
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isc__os_cacheline = s;
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}
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#endif
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}
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void
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isc__os_shutdown(void) {
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/* empty, but defined for completeness */;
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}
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