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Diffstat (limited to 'libc/unistd/sysconf.c')
-rw-r--r--libc/unistd/sysconf.c855
1 files changed, 855 insertions, 0 deletions
diff --git a/libc/unistd/sysconf.c b/libc/unistd/sysconf.c
new file mode 100644
index 000000000..96aa30122
--- /dev/null
+++ b/libc/unistd/sysconf.c
@@ -0,0 +1,855 @@
+/* Copyright (C) 1991, 93, 95, 96, 97, 2000 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.
+
+ 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.
+
+ 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. */
+
+#include <errno.h>
+#include <limits.h>
+#include <grp.h>
+#include <pwd.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/sysinfo.h>
+#include <sys/types.h>
+#include <regex.h>
+
+
+/* Get the value of the system variable NAME. */
+long int sysconf(int name)
+{
+ switch (name)
+ {
+ default:
+ 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 -1;
+#endif
+
+ case _SC_CLK_TCK:
+#ifdef CLK_TCK
+ return CLK_TCK;
+#else
+ return 60;
+#endif
+
+ case _SC_NGROUPS_MAX:
+#ifdef NGROUPS_MAX
+ return NGROUPS_MAX;
+#else
+ return -1;
+#endif
+
+ case _SC_OPEN_MAX:
+#if 0
+ return getdtablesize ();
+#else
+ return -1;
+#endif
+
+ case _SC_STREAM_MAX:
+#ifdef STREAM_MAX
+ return STREAM_MAX;
+#else
+ return FOPEN_MAX;
+#endif
+
+ case _SC_TZNAME_MAX:
+#if 0
+ return tzname_max ();
+#else
+ return -1;
+#endif
+
+ case _SC_JOB_CONTROL:
+#ifdef _POSIX_JOB_CONTROL
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_SAVED_IDS:
+#ifdef _POSIX_SAVED_IDS
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_REALTIME_SIGNALS:
+#ifdef _POSIX_REALTIME_SIGNALS
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PRIORITY_SCHEDULING:
+#ifdef _POSIX_PRIORITY_SCHEDULING
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_TIMERS:
+#ifdef _POSIX_TIMERS
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_ASYNCHRONOUS_IO:
+#ifdef _POSIX_ASYNCHRONOUS_IO
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PRIORITIZED_IO:
+#ifdef _POSIX_PRIORITIZED_IO
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_SYNCHRONIZED_IO:
+#ifdef _POSIX_SYNCHRONIZED_IO
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_FSYNC:
+#ifdef _POSIX_FSYNC
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_MAPPED_FILES:
+#ifdef _POSIX_MAPPED_FILES
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_MEMLOCK:
+#ifdef _POSIX_MEMLOCK
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_MEMLOCK_RANGE:
+#ifdef _POSIX_MEMLOCK_RANGE
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_MEMORY_PROTECTION:
+#ifdef _POSIX_MEMORY_PROTECTION
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_MESSAGE_PASSING:
+#ifdef _POSIX_MESSAGE_PASSING
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_SEMAPHORES:
+#ifdef _POSIX_SEMAPHORES
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_SHARED_MEMORY_OBJECTS:
+#ifdef _POSIX_SHARED_MEMORY_OBJECTS
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_VERSION:
+ return _POSIX_VERSION;
+
+ case _SC_PAGESIZE:
+#if 0
+ return __getpagesize ();
+#else
+ return -1;
+#endif
+
+ 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_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;
+#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:
+#ifdef _POSIX_PII
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_XTI:
+#ifdef _POSIX_PII_XTI
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_SOCKET:
+#ifdef _POSIX_PII_SOCKET
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_INTERNET:
+#ifdef _POSIX_PII_INTERNET
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_OSI:
+#ifdef _POSIX_PII_OSI
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_POLL:
+#ifdef _POSIX_POLL
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_SELECT:
+#ifdef _POSIX_SELECT
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_UIO_MAXIOV:
+#ifdef UIO_MAXIOV
+ return UIO_MAXIOV;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_INTERNET_STREAM:
+#ifdef _POSIX_PII_INTERNET_STREAM
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_INTERNET_DGRAM:
+#ifdef _POSIX_PII_INTERNET_DGRAM
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_OSI_COTS:
+#ifdef _POSIX_PII_OSI_COTS
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_OSI_CLTS:
+#ifdef _POSIX_PII_OSI_CLTS
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_PII_OSI_M:
+#ifdef _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_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:
+#ifdef _POSIX_THREADS
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_SAFE_FUNCTIONS:
+#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
+ return 1;
+#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;
+#else
+ return -1;
+#endif
+
+ case _SC_TTY_NAME_MAX:
+#ifdef _POSIX_TTY_NAME_MAX
+ return _POSIX_TTY_NAME_MAX;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_DESTRUCTOR_ITERATIONS:
+#ifdef _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:
+#ifdef _POSIX_THREAD_ATTR_STACKADDR
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_ATTR_STACKSIZE:
+#ifdef _POSIX_THREAD_ATTR_STACKSIZE
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_PRIORITY_SCHEDULING:
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_PRIO_INHERIT:
+#ifdef _POSIX_THREAD_PRIO_INHERIT
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_PRIO_PROTECT:
+#ifdef _POSIX_THREAD_PRIO_PROTECT
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_THREAD_PROCESS_SHARED:
+#ifdef _POSIX_THREAD_PROCESS_SHARED
+ return 1;
+#else
+ return -1;
+#endif
+
+ case _SC_NPROCESSORS_CONF:
+#if 0
+ return get_nprocs_conf ();
+#else
+ return -1;
+#endif
+
+ case _SC_NPROCESSORS_ONLN:
+#if 0
+ return get_nprocs ();
+#else
+ return -1;
+#endif
+
+ case _SC_PHYS_PAGES:
+#if 0
+ return get_phys_pages ();
+#else
+ return -1;
+#endif
+
+ case _SC_AVPHYS_PAGES:
+#if 0
+ return get_avphys_pages ();
+#else
+ return -1;
+#endif
+
+ 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
+
+ case _SC_XBS5_ILP32_OFF32:
+#ifdef _XBS5_ILP32_OFF32
+ return _XBS5_ILP32_OFF32;
+#else
+ return -1;
+#endif
+ case _SC_XBS5_ILP32_OFFBIG:
+#ifdef _XBS5_ILP32_OFFBIG
+ return _XBS5_ILP32_OFFBIG;
+#else
+ return -1;
+#endif
+ case _SC_XBS5_LP64_OFF64:
+#ifdef _XBS5_LP64_OFF64
+ return _XBS5_LP64_OFF64;
+#else
+ return -1;
+#endif
+ case _SC_XBS5_LPBIG_OFFBIG:
+#ifdef _XBS5_LPBIG_OFFBIG
+ return _XBS5_LPBIG_OFFBIG;
+#else
+ return -1;
+#endif
+
+ 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
+ }
+}
+