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glibc/sysdeps/posix/sysconf.c
Florian Weimer a0a0dc8317 Remove obsolete, never-implemented XSI STREAMS declarations 
The stub implementations are turned into compat symbols.

Linux actually has two reserved system call numbers (for getpmsg
and putpmsg), but these system calls have never been implemented,
and there are no plans to implement them, so this patch replaces
the wrappers with the generic stubs.

According to <https://bugzilla.redhat.com/show_bug.cgi?id=436349>,
the presence of the XSI STREAMS declarations is a minor portability
hazard because they are not actually implemented.

This commit does not change the TIRPC support code in
sunrpc/rpc_svcout.c.  It uses additional XTI functionality and
therefore never worked with glibc.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2019-03-14 15:44:15 +01:00

1225 lines
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/* Copyright (C) 1991-2019 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 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <limits.h>
#include <grp.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 (int name)
{
switch (name)
{
/* Also add obsolete or unnecessarily added constants here. */
case _SC_EQUIV_CLASS_MAX:
default:
__set_errno (EINVAL);
return -1;
case _SC_ARG_MAX:
#ifdef ARG_MAX
return ARG_MAX;
#else
return -1;
#endif
case _SC_CHILD_MAX:
#ifdef CHILD_MAX
return CHILD_MAX;
#else
return __get_child_max ();
#endif
case _SC_CLK_TCK:
return __getclktck ();
case _SC_NGROUPS_MAX:
#ifdef NGROUPS_MAX
return NGROUPS_MAX;
#else
return -1;
#endif
case _SC_OPEN_MAX:
return __getdtablesize ();
case _SC_STREAM_MAX:
#ifdef STREAM_MAX
return STREAM_MAX;
#else
return FOPEN_MAX;
#endif
case _SC_TZNAME_MAX:
return -1;
case _SC_JOB_CONTROL:
#if CONF_IS_DEFINED_SET (_POSIX_JOB_CONTROL)
return _POSIX_JOB_CONTROL;
#else
return -1;
#endif
case _SC_SAVED_IDS:
#if CONF_IS_DEFINED_SET (_POSIX_SAVED_IDS)
return 1;
#else
return -1;
#endif
case _SC_REALTIME_SIGNALS:
#if CONF_IS_DEFINED_SET (_POSIX_REALTIME_SIGNALS)
return _POSIX_REALTIME_SIGNALS;
#else
return -1;
#endif
case _SC_PRIORITY_SCHEDULING:
#if CONF_IS_DEFINED_SET (_POSIX_PRIORITY_SCHEDULING)
return _POSIX_PRIORITY_SCHEDULING;
#else
return -1;
#endif
case _SC_TIMERS:
#if CONF_IS_DEFINED_SET (_POSIX_TIMERS)
return _POSIX_TIMERS;
#else
return -1;
#endif
case _SC_ASYNCHRONOUS_IO:
#if CONF_IS_DEFINED_SET (_POSIX_ASYNCHRONOUS_IO)
return _POSIX_ASYNCHRONOUS_IO;
#else
return -1;
#endif
case _SC_PRIORITIZED_IO:
#if CONF_IS_DEFINED_SET (_POSIX_PRIORITIZED_IO)
return _POSIX_PRIORITIZED_IO;
#else
return -1;
#endif
case _SC_SYNCHRONIZED_IO:
#if CONF_IS_DEFINED_SET (_POSIX_SYNCHRONIZED_IO)
return _POSIX_SYNCHRONIZED_IO;
#else
return -1;
#endif
case _SC_FSYNC:
#if CONF_IS_DEFINED_SET (_POSIX_FSYNC)
return _POSIX_FSYNC;
#else
return -1;
#endif
case _SC_MAPPED_FILES:
#if CONF_IS_DEFINED_SET (_POSIX_MAPPED_FILES)
return _POSIX_MAPPED_FILES;
#else
return -1;
#endif
case _SC_MEMLOCK:
#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK)
return _POSIX_MEMLOCK;
#else
return -1;
#endif
case _SC_MEMLOCK_RANGE:
#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK_RANGE)
return _POSIX_MEMLOCK_RANGE;
#else
return -1;
#endif
case _SC_MEMORY_PROTECTION:
#if CONF_IS_DEFINED_SET (_POSIX_MEMORY_PROTECTION)
return _POSIX_MEMORY_PROTECTION;
#else
return -1;
#endif
case _SC_MESSAGE_PASSING:
#if CONF_IS_DEFINED_SET (_POSIX_MESSAGE_PASSING)
return _POSIX_MESSAGE_PASSING;
#else
return -1;
#endif
case _SC_SEMAPHORES:
#if CONF_IS_DEFINED_SET (_POSIX_SEMAPHORES)
return _POSIX_SEMAPHORES;
#else
return -1;
#endif
case _SC_SHARED_MEMORY_OBJECTS:
#if CONF_IS_DEFINED_SET (_POSIX_SHARED_MEMORY_OBJECTS)
return _POSIX_SHARED_MEMORY_OBJECTS;
#else
return -1;
#endif
case _SC_VERSION:
return _POSIX_VERSION;
case _SC_PAGESIZE:
return __getpagesize ();
case _SC_AIO_LISTIO_MAX:
#ifdef AIO_LISTIO_MAX
return AIO_LISTIO_MAX;
#else
return -1;
#endif
case _SC_AIO_MAX:
#ifdef AIO_MAX
return AIO_MAX;
#else
return -1;
#endif
case _SC_AIO_PRIO_DELTA_MAX:
#ifdef AIO_PRIO_DELTA_MAX
return AIO_PRIO_DELTA_MAX;
#else
return -1;
#endif
case _SC_DELAYTIMER_MAX:
#ifdef DELAYTIMER_MAX
return DELAYTIMER_MAX;
#else
return -1;
#endif
case _SC_MQ_OPEN_MAX:
#ifdef MQ_OPEN_MAX
return MQ_OPEN_MAX;
#else
return -1;
#endif
case _SC_MQ_PRIO_MAX:
#ifdef MQ_PRIO_MAX
return MQ_PRIO_MAX;
#else
return -1;
#endif
case _SC_RTSIG_MAX:
#ifdef RTSIG_MAX
return RTSIG_MAX;
#else
return -1;
#endif
case _SC_SEM_NSEMS_MAX:
#ifdef SEM_NSEMS_MAX
return SEM_NSEMS_MAX;
#else
return -1;
#endif
case _SC_SEM_VALUE_MAX:
#ifdef SEM_VALUE_MAX
return SEM_VALUE_MAX;
#else
return -1;
#endif
case _SC_SIGQUEUE_MAX:
#ifdef SIGQUEUE_MAX
return SIGQUEUE_MAX;
#else
return -1;
#endif
case _SC_TIMER_MAX:
#ifdef TIMER_MAX
return TIMER_MAX;
#else
return -1;
#endif
case _SC_BC_BASE_MAX:
#ifdef BC_BASE_MAX
return BC_BASE_MAX;
#else
return -1;
#endif
case _SC_BC_DIM_MAX:
#ifdef BC_DIM_MAX
return BC_DIM_MAX;
#else
return -1;
#endif
case _SC_BC_SCALE_MAX:
#ifdef BC_SCALE_MAX
return BC_SCALE_MAX;
#else
return -1;
#endif
case _SC_BC_STRING_MAX:
#ifdef BC_STRING_MAX
return BC_STRING_MAX;
#else
return -1;
#endif
case _SC_COLL_WEIGHTS_MAX:
#ifdef COLL_WEIGHTS_MAX
return COLL_WEIGHTS_MAX;
#else
return -1;
#endif
case _SC_EXPR_NEST_MAX:
#ifdef EXPR_NEST_MAX
return EXPR_NEST_MAX;
#else
return -1;
#endif
case _SC_LINE_MAX:
#ifdef LINE_MAX
return LINE_MAX;
#else
return -1;
#endif
case _SC_RE_DUP_MAX:
#ifdef RE_DUP_MAX
return RE_DUP_MAX;
#else
return -1;
#endif
case _SC_CHARCLASS_NAME_MAX:
#ifdef CHARCLASS_NAME_MAX
return CHARCLASS_NAME_MAX;
#else
return -1;
#endif
case _SC_PII:
#if CONF_IS_DEFINED_SET (_POSIX_PII)
return 1;
#else
return -1;
#endif
case _SC_PII_XTI:
#if CONF_IS_DEFINED_SET (_POSIX_PII_XTI)
return 1;
#else
return -1;
#endif
case _SC_PII_SOCKET:
#if CONF_IS_DEFINED_SET (_POSIX_PII_SOCKET)
return 1;
#else
return -1;
#endif
case _SC_PII_INTERNET:
#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI:
#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI)
return 1;
#else
return -1;
#endif
case _SC_POLL:
#if CONF_IS_DEFINED_SET (_POSIX_POLL)
return 1;
#else
return -1;
#endif
case _SC_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;
#else
return -1;
#endif
case _SC_PII_INTERNET_STREAM:
#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_STREAM)
return 1;
#else
return -1;
#endif
case _SC_PII_INTERNET_DGRAM:
#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_DGRAM)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_COTS:
#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_COTS)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_CLTS:
#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_CLTS)
return 1;
#else
return -1;
#endif
case _SC_PII_OSI_M:
#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_M)
return 1;
#else
return -1;
#endif
case _SC_T_IOV_MAX:
#ifdef _T_IOV_MAX
return _T_IOV_MAX;
#else
return -1;
#endif
case _SC_2_VERSION:
return _POSIX2_VERSION;
case _SC_2_C_BIND:
#ifdef _POSIX2_C_BIND
return _POSIX2_C_BIND;
#else
return -1;
#endif
case _SC_2_C_DEV:
#ifdef _POSIX2_C_DEV
return _POSIX2_C_DEV;
#else
return -1;
#endif
case _SC_2_C_VERSION:
#ifdef _POSIX2_C_VERSION
return _POSIX2_C_VERSION;
#else
return -1;
#endif
case _SC_2_FORT_DEV:
#ifdef _POSIX2_FORT_DEV
return _POSIX2_FORT_DEV;
#else
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;
#else
return -1;
#endif
case _SC_2_SW_DEV:
#ifdef _POSIX2_SW_DEV
return _POSIX2_SW_DEV;
#else
return -1;
#endif
case _SC_2_CHAR_TERM:
#ifdef _POSIX2_CHAR_TERM
return _POSIX2_CHAR_TERM;
#else
return -1;
#endif
case _SC_2_UPE:
#ifdef _POSIX2_UPE
return _POSIX2_UPE;
#else
return -1;
#endif
/* POSIX 1003.1c (POSIX Threads). */
case _SC_THREADS:
#if CONF_IS_DEFINED_SET (_POSIX_THREADS)
return _POSIX_THREADS;
#else
return -1;
#endif
case _SC_THREAD_SAFE_FUNCTIONS:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_SAFE_FUNCTIONS)
return _POSIX_THREAD_SAFE_FUNCTIONS;
#else
return -1;
#endif
case _SC_GETGR_R_SIZE_MAX:
return NSS_BUFLEN_GROUP;
case _SC_GETPW_R_SIZE_MAX:
return NSS_BUFLEN_PASSWD;
case _SC_LOGIN_NAME_MAX:
#ifdef LOGIN_NAME_MAX
return LOGIN_NAME_MAX;
#else
return -1;
#endif
case _SC_TTY_NAME_MAX:
#ifdef TTY_NAME_MAX
return TTY_NAME_MAX;
#else
return -1;
#endif
case _SC_THREAD_DESTRUCTOR_ITERATIONS:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_DESTRUCTOR_ITERATIONS)
return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
#else
return -1;
#endif
case _SC_THREAD_KEYS_MAX:
#ifdef PTHREAD_KEYS_MAX
return PTHREAD_KEYS_MAX;
#else
return -1;
#endif
case _SC_THREAD_STACK_MIN:
#ifdef PTHREAD_STACK_MIN
return PTHREAD_STACK_MIN;
#else
return -1;
#endif
case _SC_THREAD_THREADS_MAX:
#ifdef PTHREAD_THREADS_MAX
return PTHREAD_THREADS_MAX;
#else
return -1;
#endif
case _SC_THREAD_ATTR_STACKADDR:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKADDR)
return _POSIX_THREAD_ATTR_STACKADDR;
#else
return -1;
#endif
case _SC_THREAD_ATTR_STACKSIZE:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKSIZE)
return _POSIX_THREAD_ATTR_STACKSIZE;
#else
return -1;
#endif
case _SC_THREAD_PRIORITY_SCHEDULING:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIORITY_SCHEDULING)
return _POSIX_THREAD_PRIORITY_SCHEDULING;
#else
return -1;
#endif
case _SC_THREAD_PRIO_INHERIT:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_INHERIT)
return _POSIX_THREAD_PRIO_INHERIT;
#else
return -1;
#endif
case _SC_THREAD_PRIO_PROTECT:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_PROTECT)
return _POSIX_THREAD_PRIO_PROTECT;
#else
return -1;
#endif
case _SC_THREAD_PROCESS_SHARED:
#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PROCESS_SHARED)
return _POSIX_THREAD_PROCESS_SHARED;
#else
return -1;
#endif
case _SC_NPROCESSORS_CONF:
return __get_nprocs_conf ();
case _SC_NPROCESSORS_ONLN:
return __get_nprocs ();
case _SC_PHYS_PAGES:
return __get_phys_pages ();
case _SC_AVPHYS_PAGES:
return __get_avphys_pages ();
case _SC_ATEXIT_MAX:
/* We have no limit since we use lists. */
return INT_MAX;
case _SC_PASS_MAX:
/* We have no limit but since the return value might be used to
allocate a buffer we restrict the value. */
return BUFSIZ;
case _SC_XOPEN_VERSION:
return _XOPEN_VERSION;
case _SC_XOPEN_XCU_VERSION:
return _XOPEN_XCU_VERSION;
case _SC_XOPEN_UNIX:
return _XOPEN_UNIX;
case _SC_XOPEN_CRYPT:
#ifdef _XOPEN_CRYPT
return _XOPEN_CRYPT;
#else
return -1;
#endif
case _SC_XOPEN_ENH_I18N:
#ifdef _XOPEN_ENH_I18N
return _XOPEN_ENH_I18N;
#else
return -1;
#endif
case _SC_XOPEN_SHM:
#ifdef _XOPEN_SHM
return _XOPEN_SHM;
#else
return -1;
#endif
case _SC_XOPEN_XPG2:
#ifdef _XOPEN_XPG2
return _XOPEN_XPG2;
#else
return -1;
#endif
case _SC_XOPEN_XPG3:
#ifdef _XOPEN_XPG3
return _XOPEN_XPG3;
#else
return -1;
#endif
case _SC_XOPEN_XPG4:
#ifdef _XOPEN_XPG4
return _XOPEN_XPG4;
#else
return -1;
#endif
case _SC_CHAR_BIT:
return CHAR_BIT;
case _SC_CHAR_MAX:
return CHAR_MAX;
case _SC_CHAR_MIN:
return CHAR_MIN;
case _SC_INT_MAX:
return INT_MAX;
case _SC_INT_MIN:
return INT_MIN;
case _SC_LONG_BIT:
return sizeof (long int) * CHAR_BIT;
case _SC_WORD_BIT:
return sizeof (int) * CHAR_BIT;
case _SC_MB_LEN_MAX:
return MB_LEN_MAX;
case _SC_NZERO:
return NZERO;
case _SC_SSIZE_MAX:
return _POSIX_SSIZE_MAX;
case _SC_SCHAR_MAX:
return SCHAR_MAX;
case _SC_SCHAR_MIN:
return SCHAR_MIN;
case _SC_SHRT_MAX:
return SHRT_MAX;
case _SC_SHRT_MIN:
return SHRT_MIN;
case _SC_UCHAR_MAX:
return UCHAR_MAX;
case _SC_UINT_MAX:
return UINT_MAX;
case _SC_ULONG_MAX:
return ULONG_MAX;
case _SC_USHRT_MAX:
return USHRT_MAX;
case _SC_NL_ARGMAX:
#ifdef NL_ARGMAX
return NL_ARGMAX;
#else
return -1;
#endif
case _SC_NL_LANGMAX:
#ifdef NL_LANGMAX
return NL_LANGMAX;
#else
return -1;
#endif
case _SC_NL_MSGMAX:
#ifdef NL_MSGMAX
return NL_MSGMAX;
#else
return -1;
#endif
case _SC_NL_NMAX:
#ifdef NL_NMAX
return NL_NMAX;
#else
return -1;
#endif
case _SC_NL_SETMAX:
#ifdef NL_SETMAX
return NL_SETMAX;
#else
return -1;
#endif
case _SC_NL_TEXTMAX:
#ifdef NL_TEXTMAX
return NL_TEXTMAX;
#else
return -1;
#endif
#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_BASE:
#if CONF_IS_DEFINED_SET (_POSIX_BASE)
return _POSIX_BASE;
#else
return -1;
#endif
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_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_CLOCK_SELECTION:
#if CONF_IS_DEFINED_SET (_POSIX_CLOCK_SELECTION)
return _POSIX_CLOCK_SELECTION;
#else
return -1;
#endif
case _SC_CPUTIME:
#if CONF_IS_DEFINED_SET (_POSIX_CPUTIME)
return _POSIX_CPUTIME;
#else
return -1;
#endif
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 = __xstat64 (_STAT_VER, name, &st) >= 0 ? 1 : -1;
__set_errno (save_errno);
return ret;
}
#endif
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