-/* Copyright (C) 1991, 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2020 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.
+ 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
- Library General Public License for more details.
+ Lesser 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <limits.h>
#include <pwd.h>
#include <stddef.h>
#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
#include <time.h>
#include <unistd.h>
+#include <sys/param.h>
+#include <sys/stat.h>
#include <sys/sysinfo.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <regex.h>
+
+#define NEED_SPEC_ARRAY 0
+#include <posix-conf-vars.h>
+
+#define NEED_CHECK_SPEC \
+ (!defined _XBS5_ILP32_OFF32 || !defined _XBS5_ILP32_OFFBIG \
+ || !defined _XBS5_LP64_OFF64 || !defined _XBS5_LPBIG_OFFBIG \
+ || !defined _POSIX_V6_ILP32_OFF32 || !defined _POSIX_V6_ILP32_OFFBIG \
+ || !defined _POSIX_V6_LP64_OFF64 || !defined _POSIX_V6_LPBIG_OFFBIG \
+ || !defined _POSIX_V7_ILP32_OFF32 || !defined _POSIX_V7_ILP32_OFFBIG \
+ || !defined _POSIX_V7_LP64_OFF64 || !defined _POSIX_V7_LPBIG_OFFBIG)
+#if NEED_CHECK_SPEC
+static long int __sysconf_check_spec (const char *spec);
+#endif
/* Get the value of the system variable NAME. */
long int
-__sysconf (name)
- int name;
+__sysconf (int name)
{
switch (name)
{
+ /* Also add obsolete or unnecessarily added constants here. */
+ case _SC_EQUIV_CLASS_MAX:
default:
__set_errno (EINVAL);
return -1;
#ifdef CHILD_MAX
return CHILD_MAX;
#else
- return -1;
+ return __get_child_max ();
#endif
case _SC_CLK_TCK:
-#ifdef CLK_TCK
- return CLK_TCK;
-#else
- return 60;
-#endif
+ return __getclktck ();
case _SC_NGROUPS_MAX:
#ifdef NGROUPS_MAX
#endif
case _SC_TZNAME_MAX:
- return __tzname_max ();
+ return -1;
case _SC_JOB_CONTROL:
-#ifdef _POSIX_JOB_CONTROL
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_JOB_CONTROL)
+ return _POSIX_JOB_CONTROL;
#else
return -1;
#endif
case _SC_SAVED_IDS:
-#ifdef _POSIX_SAVED_IDS
+#if CONF_IS_DEFINED_SET (_POSIX_SAVED_IDS)
return 1;
#else
return -1;
#endif
case _SC_REALTIME_SIGNALS:
-#ifdef _POSIX_REALTIME_SIGNALS
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_REALTIME_SIGNALS)
+ return _POSIX_REALTIME_SIGNALS;
#else
return -1;
#endif
case _SC_PRIORITY_SCHEDULING:
-#ifdef _POSIX_PRIORITY_SCHEDULING
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_PRIORITY_SCHEDULING)
+ return _POSIX_PRIORITY_SCHEDULING;
#else
return -1;
#endif
case _SC_TIMERS:
-#ifdef _POSIX_TIMERS
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_TIMERS)
+ return _POSIX_TIMERS;
#else
return -1;
#endif
case _SC_ASYNCHRONOUS_IO:
-#ifdef _POSIX_ASYNCHRONOUS_IO
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_ASYNCHRONOUS_IO)
+ return _POSIX_ASYNCHRONOUS_IO;
#else
return -1;
#endif
case _SC_PRIORITIZED_IO:
-#ifdef _POSIX_PRIORITIZED_IO
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_PRIORITIZED_IO)
+ return _POSIX_PRIORITIZED_IO;
#else
return -1;
#endif
case _SC_SYNCHRONIZED_IO:
-#ifdef _POSIX_SYNCHRONIZED_IO
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_SYNCHRONIZED_IO)
+ return _POSIX_SYNCHRONIZED_IO;
#else
return -1;
#endif
case _SC_FSYNC:
-#ifdef _POSIX_FSYNC
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_FSYNC)
+ return _POSIX_FSYNC;
#else
return -1;
#endif
case _SC_MAPPED_FILES:
-#ifdef _POSIX_MAPPED_FILES
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_MAPPED_FILES)
+ return _POSIX_MAPPED_FILES;
#else
return -1;
#endif
case _SC_MEMLOCK:
-#ifdef _POSIX_MEMLOCK
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK)
+ return _POSIX_MEMLOCK;
#else
return -1;
#endif
case _SC_MEMLOCK_RANGE:
-#ifdef _POSIX_MEMLOCK_RANGE
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK_RANGE)
+ return _POSIX_MEMLOCK_RANGE;
#else
return -1;
#endif
case _SC_MEMORY_PROTECTION:
-#ifdef _POSIX_MEMORY_PROTECTION
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_MEMORY_PROTECTION)
+ return _POSIX_MEMORY_PROTECTION;
#else
return -1;
#endif
case _SC_MESSAGE_PASSING:
-#ifdef _POSIX_MESSAGE_PASSING
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_MESSAGE_PASSING)
+ return _POSIX_MESSAGE_PASSING;
#else
return -1;
#endif
case _SC_SEMAPHORES:
-#ifdef _POSIX_SEMAPHORES
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_SEMAPHORES)
+ return _POSIX_SEMAPHORES;
#else
return -1;
#endif
case _SC_SHARED_MEMORY_OBJECTS:
-#ifdef _POSIX_SHARED_MEMORY_OBJECTS
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_SHARED_MEMORY_OBJECTS)
+ return _POSIX_SHARED_MEMORY_OBJECTS;
#else
return -1;
#endif
return -1;
#endif
- case _SC_EQUIV_CLASS_MAX:
-#ifdef EQUIV_CLASS_MAX
- return EQUIV_CLASS_MAX;
-#else
- return -1;
-#endif
-
case _SC_EXPR_NEST_MAX:
#ifdef EXPR_NEST_MAX
return EXPR_NEST_MAX;
#endif
case _SC_PII:
-#ifdef _POSIX_PII
+#if CONF_IS_DEFINED_SET (_POSIX_PII)
return 1;
#else
return -1;
#endif
case _SC_PII_XTI:
-#ifdef _POSIX_PII_XTI
+#if CONF_IS_DEFINED_SET (_POSIX_PII_XTI)
return 1;
#else
return -1;
#endif
case _SC_PII_SOCKET:
-#ifdef _POSIX_PII_SOCKET
+#if CONF_IS_DEFINED_SET (_POSIX_PII_SOCKET)
return 1;
#else
return -1;
#endif
case _SC_PII_INTERNET:
-#ifdef _POSIX_PII_INTERNET
+#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI:
-#ifdef _POSIX_PII_OSI
+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI)
return 1;
#else
return -1;
#endif
case _SC_POLL:
-#ifdef _POSIX_POLL
+#if CONF_IS_DEFINED_SET (_POSIX_POLL)
return 1;
#else
return -1;
#endif
case _SC_SELECT:
-#ifdef _POSIX_SELECT
+#if CONF_IS_DEFINED_SET (_POSIX_SELECT)
return 1;
#else
return -1;
#endif
+ /* The same as _SC_IOV_MAX. */
case _SC_UIO_MAXIOV:
#ifdef UIO_MAXIOV
return UIO_MAXIOV;
#endif
case _SC_PII_INTERNET_STREAM:
-#ifdef _POSIX_PII_INTERNET_STREAM
+#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_STREAM)
return 1;
#else
return -1;
#endif
case _SC_PII_INTERNET_DGRAM:
-#ifdef _POSIX_PII_INTERNET_DGRAM
+#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_DGRAM)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_COTS:
-#ifdef _POSIX_PII_OSI_COTS
+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_COTS)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_CLTS:
-#ifdef _POSIX_PII_OSI_CLTS
+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_CLTS)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_M:
-#ifdef _POSIX_PII_OSI_M
+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_M)
return 1;
#else
return -1;
return -1;
#endif
+ case _SC_2_FORT_RUN:
+#ifdef _POSIX2_FORT_RUN
+ return _POSIX2_FORT_RUN;
+#else
+ return -1;
+#endif
+
case _SC_2_LOCALEDEF:
#ifdef _POSIX2_LOCALEDEF
return _POSIX2_LOCALEDEF;
/* POSIX 1003.1c (POSIX Threads). */
case _SC_THREADS:
-#ifdef _POSIX_THREADS
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREADS)
+ return _POSIX_THREADS;
#else
return -1;
#endif
case _SC_THREAD_SAFE_FUNCTIONS:
-#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_SAFE_FUNCTIONS)
+ return _POSIX_THREAD_SAFE_FUNCTIONS;
#else
return -1;
#endif
case _SC_GETGR_R_SIZE_MAX:
-#ifdef NSS_BUFLEN_GROUP
return NSS_BUFLEN_GROUP;
-#else
- return -1;
-#endif
case _SC_GETPW_R_SIZE_MAX:
-#ifdef NSS_BUFLEN_PASSWD
return NSS_BUFLEN_PASSWD;
-#else
- return -1;
-#endif
case _SC_LOGIN_NAME_MAX:
-#ifdef _POSIX_LOGIN_NAME_MAX
- return _POSIX_LOGIN_NAME_MAX;
+#ifdef LOGIN_NAME_MAX
+ return LOGIN_NAME_MAX;
#else
return -1;
#endif
case _SC_TTY_NAME_MAX:
-#ifdef _POSIX_TTY_NAME_MAX
- return _POSIX_TTY_NAME_MAX;
+#ifdef TTY_NAME_MAX
+ return TTY_NAME_MAX;
#else
return -1;
#endif
case _SC_THREAD_DESTRUCTOR_ITERATIONS:
-#ifdef _POSIX_THREAD_DESTRUCTOR_ITERATIONS
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_DESTRUCTOR_ITERATIONS)
return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
#else
return -1;
#endif
case _SC_THREAD_ATTR_STACKADDR:
-#ifdef _POSIX_THREAD_ATTR_STACKADDR
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKADDR)
+ return _POSIX_THREAD_ATTR_STACKADDR;
#else
return -1;
#endif
case _SC_THREAD_ATTR_STACKSIZE:
-#ifdef _POSIX_THREAD_ATTR_STACKSIZE
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKSIZE)
+ return _POSIX_THREAD_ATTR_STACKSIZE;
#else
return -1;
#endif
case _SC_THREAD_PRIORITY_SCHEDULING:
-#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIORITY_SCHEDULING)
+ return _POSIX_THREAD_PRIORITY_SCHEDULING;
#else
return -1;
#endif
case _SC_THREAD_PRIO_INHERIT:
-#ifdef _POSIX_THREAD_PRIO_INHERIT
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_INHERIT)
+ return _POSIX_THREAD_PRIO_INHERIT;
#else
return -1;
#endif
case _SC_THREAD_PRIO_PROTECT:
-#ifdef _POSIX_THREAD_PRIO_PROTECT
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_PROTECT)
+ return _POSIX_THREAD_PRIO_PROTECT;
#else
return -1;
#endif
case _SC_THREAD_PROCESS_SHARED:
-#ifdef _POSIX_THREAD_PROCESS_SHARED
- return 1;
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PROCESS_SHARED)
+ return _POSIX_THREAD_PROCESS_SHARED;
#else
return -1;
#endif
return -1;
#endif
- case _SC_XBS5_ILP32_OFF32:
-#ifdef _XBS5_ILP32_OFF32
- return _XBS5_ILP32_OFF32;
+#define START_ENV_GROUP(VERSION) \
+ /* Empty. */
+
+#define END_ENV_GROUP(VERSION) \
+ /* Empty. */
+
+#define KNOWN_ABSENT_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \
+ case _SC_##SC_PREFIX##_##SUFFIX: \
+ return _##ENV_PREFIX##_##SUFFIX;
+
+#define KNOWN_PRESENT_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \
+ case _SC_##SC_PREFIX##_##SUFFIX: \
+ return _##ENV_PREFIX##_##SUFFIX;
+
+#define UNKNOWN_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \
+ case _SC_##SC_PREFIX##_##SUFFIX: \
+ return __sysconf_check_spec (#SUFFIX);
+
+#include <posix/posix-envs.def>
+
+#undef START_ENV_GROUP
+#undef END_ENV_GROUP
+#undef KNOWN_ABSENT_ENVIRONMENT
+#undef KNOWN_PRESENT_ENVIRONMENT
+#undef UNKNOWN_ENVIRONMENT
+
+ case _SC_XOPEN_LEGACY:
+ return _XOPEN_LEGACY;
+
+ case _SC_XOPEN_REALTIME:
+#ifdef _XOPEN_REALTIME
+ return _XOPEN_REALTIME;
+#else
+ return -1;
+#endif
+ case _SC_XOPEN_REALTIME_THREADS:
+#ifdef _XOPEN_REALTIME_THREADS
+ return _XOPEN_REALTIME_THREADS;
+#else
+ return -1;
+#endif
+
+ case _SC_ADVISORY_INFO:
+#if CONF_IS_DEFINED_SET (_POSIX_ADVISORY_INFO)
+ return _POSIX_ADVISORY_INFO;
+#else
+ return -1;
+#endif
+
+ case _SC_BARRIERS:
+#if CONF_IS_DEFINED_SET (_POSIX_BARRIERS)
+ return _POSIX_BARRIERS;
#else
return -1;
#endif
- case _SC_XBS5_ILP32_OFFBIG:
-#ifdef _XBS5_ILP32_OFFBIG
- return _XBS5_ILP32_OFFBIG;
+
+ case _SC_BASE:
+#if CONF_IS_DEFINED_SET (_POSIX_BASE)
+ return _POSIX_BASE;
#else
return -1;
#endif
- case _SC_XBS5_LP64_OFF64:
-#ifdef _XBS5_LP64_OFF64
- return _XBS5_LP64_OFF64;
+ case _SC_C_LANG_SUPPORT:
+#if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT)
+ return _POSIX_C_LANG_SUPPORT;
#else
return -1;
#endif
- case _SC_XBS5_LPBIG_OFFBIG:
-#ifdef _XBS5_LPBIG_OFFBIG
- return _XBS5_LPBIG_OFFBIG;
+ case _SC_C_LANG_SUPPORT_R:
+#if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT_R)
+ return _POSIX_C_LANG_SUPPORT_R;
#else
return -1;
#endif
- case _SC_XOPEN_LEGACY:
- return _XOPEN_LEGACY;
+ case _SC_CLOCK_SELECTION:
+#if CONF_IS_DEFINED_SET (_POSIX_CLOCK_SELECTION)
+ return _POSIX_CLOCK_SELECTION;
+#else
+ return -1;
+#endif
- case _SC_XOPEN_REALTIME:
-#ifdef _XOPEN_REALTIME
- return _XOPEN_REALTIME;
+ case _SC_CPUTIME:
+#if CONF_IS_DEFINED_SET (_POSIX_CPUTIME)
+ return _POSIX_CPUTIME;
#else
return -1;
#endif
- case _SC_XOPEN_REALTIME_THREADS:
-#ifdef _XOPEN_REALTIME_THREADS
- return _XOPEN_REALTIME_THREADS;
+
+ case _SC_DEVICE_IO:
+#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_IO)
+ return _POSIX_DEVICE_IO;
+#else
+ return -1;
+#endif
+ case _SC_DEVICE_SPECIFIC:
+#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC)
+ return _POSIX_DEVICE_SPECIFIC;
+#else
+ return -1;
+#endif
+ case _SC_DEVICE_SPECIFIC_R:
+#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC_R)
+ return _POSIX_DEVICE_SPECIFIC_R;
+#else
+ return -1;
+#endif
+
+ case _SC_FD_MGMT:
+#if CONF_IS_DEFINED_SET (_POSIX_FD_MGMT)
+ return _POSIX_FD_MGMT;
+#else
+ return -1;
+#endif
+
+ case _SC_FIFO:
+#if CONF_IS_DEFINED_SET (_POSIX_FIFO)
+ return _POSIX_FIFO;
+#else
+ return -1;
+#endif
+ case _SC_PIPE:
+#if CONF_IS_DEFINED_SET (_POSIX_PIPE)
+ return _POSIX_PIPE;
+#else
+ return -1;
+#endif
+
+ case _SC_FILE_ATTRIBUTES:
+#if CONF_IS_DEFINED_SET (_POSIX_FILE_ATTRIBUTES)
+ return _POSIX_FILE_ATTRIBUTES;
+#else
+ return -1;
+#endif
+ case _SC_FILE_LOCKING:
+#if CONF_IS_DEFINED_SET (_POSIX_FILE_LOCKING)
+ return _POSIX_FILE_LOCKING;
+#else
+ return -1;
+#endif
+ case _SC_FILE_SYSTEM:
+#if CONF_IS_DEFINED_SET (_POSIX_FILE_SYSTEM)
+ return _POSIX_FILE_SYSTEM;
+#else
+ return -1;
+#endif
+
+ case _SC_MONOTONIC_CLOCK:
+#if CONF_IS_DEFINED_SET (_POSIX_MONOTONIC_CLOCK)
+ return _POSIX_MONOTONIC_CLOCK;
+#else
+ return -1;
+#endif
+
+ case _SC_MULTI_PROCESS:
+#if CONF_IS_DEFINED_SET (_POSIX_MULTI_PROCESS)
+ return _POSIX_MULTI_PROCESS;
+#else
+ return -1;
+#endif
+ case _SC_SINGLE_PROCESS:
+#if CONF_IS_DEFINED_SET (_POSIX_SINGLE_PROCESS)
+ return _POSIX_SINGLE_PROCESS;
+#else
+ return -1;
+#endif
+
+ case _SC_NETWORKING:
+#if CONF_IS_DEFINED_SET (_POSIX_NETWORKING)
+ return _POSIX_NETWORKING;
+#else
+ return -1;
+#endif
+
+ case _SC_READER_WRITER_LOCKS:
+#if CONF_IS_DEFINED_SET (_POSIX_READER_WRITER_LOCKS)
+ return _POSIX_READER_WRITER_LOCKS;
+#else
+ return -1;
+#endif
+ case _SC_SPIN_LOCKS:
+#if CONF_IS_DEFINED_SET (_POSIX_SPIN_LOCKS)
+ return _POSIX_SPIN_LOCKS;
+#else
+ return -1;
+#endif
+
+ case _SC_REGEXP:
+#if CONF_IS_DEFINED_SET (_POSIX_REGEXP)
+ return _POSIX_REGEXP;
+#else
+ return -1;
+#endif
+ /* _REGEX_VERSION has been removed with IEEE Std 1003.1-2001/Cor 2-2004,
+ item XSH/TC2/D6/137. */
+ case _SC_REGEX_VERSION:
+ return -1;
+
+ case _SC_SHELL:
+#if CONF_IS_DEFINED_SET (_POSIX_SHELL)
+ return _POSIX_SHELL;
+#else
+ return -1;
+#endif
+
+ case _SC_SIGNALS:
+#if CONF_IS_DEFINED (_POSIX_SIGNALS)
+ return _POSIX_SIGNALS;
+#else
+ return -1;
+#endif
+
+ case _SC_SPAWN:
+#if CONF_IS_DEFINED_SET (_POSIX_SPAWN)
+ return _POSIX_SPAWN;
+#else
+ return -1;
+#endif
+
+ case _SC_SPORADIC_SERVER:
+#if CONF_IS_DEFINED_SET (_POSIX_SPORADIC_SERVER)
+ return _POSIX_SPORADIC_SERVER;
+#else
+ return -1;
+#endif
+ case _SC_THREAD_SPORADIC_SERVER:
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_SPORADIC_SERVER)
+ return _POSIX_THREAD_SPORADIC_SERVER;
+#else
+ return -1;
+#endif
+
+ case _SC_SYSTEM_DATABASE:
+#if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE)
+ return _POSIX_SYSTEM_DATABASE;
+#else
+ return -1;
+#endif
+ case _SC_SYSTEM_DATABASE_R:
+#if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE_R)
+ return _POSIX_SYSTEM_DATABASE_R;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_CPUTIME:
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_CPUTIME)
+ return _POSIX_THREAD_CPUTIME;
+#else
+ return -1;
+#endif
+
+ case _SC_TIMEOUTS:
+#if CONF_IS_DEFINED_SET (_POSIX_TIMEOUTS)
+ return _POSIX_TIMEOUTS;
+#else
+ return -1;
+#endif
+
+ case _SC_TYPED_MEMORY_OBJECTS:
+#if CONF_IS_DEFINED_SET (_POSIX_TYPED_MEMORY_OBJECTS)
+ return _POSIX_TYPED_MEMORY_OBJECTS;
+#else
+ return -1;
+#endif
+
+ case _SC_USER_GROUPS:
+#if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS)
+ return _POSIX_USER_GROUPS;
+#else
+ return -1;
+#endif
+ case _SC_USER_GROUPS_R:
+#if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS_R)
+ return _POSIX_USER_GROUPS_R;
+#else
+ return -1;
+#endif
+
+ case _SC_2_PBS:
+#ifdef _POSIX2_PBS
+ return _POSIX2_PBS;
+#else
+ return -1;
+#endif
+ case _SC_2_PBS_ACCOUNTING:
+#ifdef _POSIX2_PBS_ACCOUNTING
+ return _POSIX2_PBS_ACCOUNTING;
+#else
+ return -1;
+#endif
+ case _SC_2_PBS_CHECKPOINT:
+#ifdef _POSIX2_PBS_CHECKPOINT
+ return _POSIX2_PBS_CHECKPOINT;
+#else
+ return -1;
+#endif
+ case _SC_2_PBS_LOCATE:
+#ifdef _POSIX2_PBS_LOCATE
+ return _POSIX2_PBS_LOCATE;
+#else
+ return -1;
+#endif
+ case _SC_2_PBS_MESSAGE:
+#ifdef _POSIX2_PBS_MESSAGE
+ return _POSIX2_PBS_MESSAGE;
+#else
+ return -1;
+#endif
+ case _SC_2_PBS_TRACK:
+#ifdef _POSIX2_PBS_TRACK
+ return _POSIX2_PBS_TRACK;
+#else
+ return -1;
+#endif
+
+ case _SC_SYMLOOP_MAX:
+#ifdef SYMLOOP_MAX
+ return SYMLOOP_MAX;
+#else
+ return -1;
+#endif
+
+ case _SC_STREAMS:
+ return -1;
+
+ case _SC_HOST_NAME_MAX:
+#ifdef HOST_NAME_MAX
+ return HOST_NAME_MAX;
+#else
+ return -1;
+#endif
+
+ case _SC_TRACE:
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE)
+ return _POSIX_TRACE;
+#else
+ return -1;
+#endif
+ case _SC_TRACE_EVENT_FILTER:
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE_EVENT_FILTER)
+ return _POSIX_TRACE_EVENT_FILTER;
+#else
+ return -1;
+#endif
+ case _SC_TRACE_INHERIT:
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE_INHERIT)
+ return _POSIX_TRACE_INHERIT;
+#else
+ return -1;
+#endif
+ case _SC_TRACE_LOG:
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE_LOG)
+ return _POSIX_TRACE_LOG;
+#else
+ return -1;
+#endif
+
+ case _SC_TRACE_EVENT_NAME_MAX:
+ case _SC_TRACE_NAME_MAX:
+ case _SC_TRACE_SYS_MAX:
+ case _SC_TRACE_USER_EVENT_MAX:
+ /* No support for tracing. */
+
+ case _SC_XOPEN_STREAMS:
+ /* No support for STREAMS. */
+ return -1;
+
+ case _SC_LEVEL1_ICACHE_SIZE:
+ case _SC_LEVEL1_ICACHE_ASSOC:
+ case _SC_LEVEL1_ICACHE_LINESIZE:
+ case _SC_LEVEL1_DCACHE_SIZE:
+ case _SC_LEVEL1_DCACHE_ASSOC:
+ case _SC_LEVEL1_DCACHE_LINESIZE:
+ case _SC_LEVEL2_CACHE_SIZE:
+ case _SC_LEVEL2_CACHE_ASSOC:
+ case _SC_LEVEL2_CACHE_LINESIZE:
+ case _SC_LEVEL3_CACHE_SIZE:
+ case _SC_LEVEL3_CACHE_ASSOC:
+ case _SC_LEVEL3_CACHE_LINESIZE:
+ case _SC_LEVEL4_CACHE_SIZE:
+ case _SC_LEVEL4_CACHE_ASSOC:
+ case _SC_LEVEL4_CACHE_LINESIZE:
+ /* In general we cannot determine these values. Therefore we
+ return zero which indicates that no information is
+ available. */
+ return 0;
+
+ case _SC_IPV6:
+#if CONF_IS_DEFINED_SET (_POSIX_IPV6)
+ return _POSIX_IPV6;
+#else
+ return -1;
+#endif
+
+ case _SC_RAW_SOCKETS:
+#if CONF_IS_DEFINED_SET (_POSIX_RAW_SOCKETS)
+ return _POSIX_RAW_SOCKETS;
#else
return -1;
#endif
}
}
+#undef __sysconf
weak_alias (__sysconf, sysconf)
+libc_hidden_def (__sysconf)
+
+#if NEED_CHECK_SPEC
+static long int
+__sysconf_check_spec (const char *spec)
+{
+ int save_errno = errno;
+
+ const char *getconf_dir = __libc_secure_getenv ("GETCONF_DIR") ?: GETCONF_DIR;
+ size_t getconf_dirlen = strlen (getconf_dir);
+ size_t speclen = strlen (spec);
+
+ char name[getconf_dirlen + sizeof ("/POSIX_V6_") + speclen];
+ memcpy (mempcpy (mempcpy (name, getconf_dir, getconf_dirlen),
+ "/POSIX_V6_", sizeof ("/POSIX_V6_") - 1),
+ spec, speclen + 1);
+
+ struct stat64 st;
+ long int ret = __stat64 (name, &st) >= 0 ? 1 : -1;
+
+ __set_errno (save_errno);
+ return ret;
+}
+#endif