[thirdparty/glibc.git] / sysdeps / generic / sysconf.c

/* Copyright (C) 1991,1993,1995-1997,2001,2002 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <time.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/sysinfo.h>


/* Get the value of the system variable NAME.  */
long int
__sysconf (name)
     int name;
{
  switch (name)
    {
    default:
      __set_errno (EINVAL);
      return -1;

    case _SC_TZNAME_MAX:
      return MAX (__tzname_max (), _POSIX_TZNAME_MAX);

    case _SC_CHARCLASS_NAME_MAX:
#ifdef	CHARCLASS_NAME_MAX
      return CHARCLASS_NAME_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_2_LOCALEDEF:
#ifdef	_POSIX2_LOCALEDEF
      return _POSIX2_LOCALEDEF;
#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_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_ARG_MAX:
    case _SC_CHILD_MAX:
    case _SC_CLK_TCK:
    case _SC_NGROUPS_MAX:
    case _SC_OPEN_MAX:
    case _SC_STREAM_MAX:
    case _SC_JOB_CONTROL:
    case _SC_SAVED_IDS:
    case _SC_REALTIME_SIGNALS:
    case _SC_PRIORITY_SCHEDULING:
    case _SC_TIMERS:
    case _SC_ASYNCHRONOUS_IO:
    case _SC_PRIORITIZED_IO:
    case _SC_SYNCHRONIZED_IO:
    case _SC_FSYNC:
    case _SC_MAPPED_FILES:
    case _SC_MEMLOCK:
    case _SC_MEMLOCK_RANGE:
    case _SC_MEMORY_PROTECTION:
    case _SC_MESSAGE_PASSING:
    case _SC_SEMAPHORES:
    case _SC_SHARED_MEMORY_OBJECTS:

    case _SC_AIO_LISTIO_MAX:
    case _SC_AIO_MAX:
    case _SC_AIO_PRIO_DELTA_MAX:
    case _SC_DELAYTIMER_MAX:
    case _SC_MQ_OPEN_MAX:
    case _SC_MQ_PRIO_MAX:
    case _SC_VERSION:
    case _SC_PAGESIZE:
    case _SC_RTSIG_MAX:
    case _SC_SEM_NSEMS_MAX:
    case _SC_SEM_VALUE_MAX:
    case _SC_SIGQUEUE_MAX:
    case _SC_TIMER_MAX:

    case _SC_PII:
    case _SC_PII_XTI:
    case _SC_PII_SOCKET:
    case _SC_PII_OSI:
    case _SC_POLL:
    case _SC_SELECT:
    case _SC_UIO_MAXIOV:
    case _SC_PII_INTERNET_STREAM:
    case _SC_PII_INTERNET_DGRAM:
    case _SC_PII_OSI_COTS:
    case _SC_PII_OSI_CLTS:
    case _SC_PII_OSI_M:
    case _SC_T_IOV_MAX:

    case _SC_BC_BASE_MAX:
    case _SC_BC_DIM_MAX:
    case _SC_BC_SCALE_MAX:
    case _SC_BC_STRING_MAX:
    case _SC_EXPR_NEST_MAX:
    case _SC_LINE_MAX:
    case _SC_RE_DUP_MAX:
    case _SC_2_VERSION:
    case _SC_2_C_BIND:
    case _SC_2_C_DEV:
    case _SC_2_FORT_DEV:
    case _SC_2_SW_DEV:
    case _SC_2_CHAR_TERM:
    case _SC_2_C_VERSION:
    case _SC_2_UPE:

    case _SC_THREADS:
    case _SC_THREAD_SAFE_FUNCTIONS:
    case _SC_GETGR_R_SIZE_MAX:
    case _SC_GETPW_R_SIZE_MAX:
    case _SC_LOGIN_NAME_MAX:
    case _SC_TTY_NAME_MAX:
    case _SC_THREAD_DESTRUCTOR_ITERATIONS:
    case _SC_THREAD_KEYS_MAX:
    case _SC_THREAD_STACK_MIN:
    case _SC_THREAD_THREADS_MAX:
    case _SC_THREAD_ATTR_STACKADDR:
    case _SC_THREAD_ATTR_STACKSIZE:
    case _SC_THREAD_PRIORITY_SCHEDULING:
    case _SC_THREAD_PRIO_INHERIT:
    case _SC_THREAD_PRIO_PROTECT:
    case _SC_THREAD_PROCESS_SHARED:

    case _SC_XOPEN_VERSION:
    case _SC_XOPEN_XCU_VERSION:
    case _SC_XOPEN_UNIX:
    case _SC_XOPEN_CRYPT:
    case _SC_XOPEN_ENH_I18N:
    case _SC_XOPEN_SHM:
    case _SC_XOPEN_XPG2:
    case _SC_XOPEN_XPG3:
    case _SC_XOPEN_XPG4:

    case _SC_NL_ARGMAX:
    case _SC_NL_LANGMAX:
    case _SC_NL_MSGMAX:
    case _SC_NL_NMAX:
    case _SC_NL_SETMAX:
    case _SC_NL_TEXTMAX:

    case _SC_XBS5_ILP32_OFF32:
    case _SC_XBS5_ILP32_OFFBIG:
    case _SC_XBS5_LP64_OFF64:
    case _SC_XBS5_LPBIG_OFFBIG:

    case _SC_XOPEN_LEGACY:
    case _SC_XOPEN_REALTIME:
    case _SC_XOPEN_REALTIME_THREADS:

      break;
    }

  __set_errno (ENOSYS);
  return -1;
}

weak_alias (__sysconf, sysconf)
libc_hidden_def (__sysconf)

stub_warning (sysconf)
#include <stub-tag.h>
Commit	Line	Data
a20d8dbe	1	/* Copyright (C) 1991,1993,1995-1997,2001,2002 Free Software Foundation, Inc.
b5791037	2	This file is part of the GNU C Library.
28f540f4	3
b5791037	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
28f540f4	8
b5791037 UD	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	12	Lesser General Public License for more details.
28f540f4	13
41bdb6e2 AJ	14	You should have received a copy of the GNU Lesser General Public
	15	License along with the GNU C Library; if not, write to the Free
	16	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	17	02111-1307 USA. */
28f540f4	18
28f540f4	19	#include <errno.h>
845dcb57	20	#include <stdio.h>
28f540f4 RM	21	#include <unistd.h>
	22	#include <time.h>
	23	#include <limits.h>
9cddf9de	24	#include <sys/param.h>
845dcb57	25	#include <sys/sysinfo.h>
28f540f4 RM	26
	27
	28	/* Get the value of the system variable NAME. */
	29	long int
036cc82f RM	30	__sysconf (name)
036cc82f RM	31	int name;
28f540f4 RM	32	{
	33	switch (name)
	34	{
	35	default:
c4029823	36	__set_errno (EINVAL);
28f540f4 RM	37	return -1;
	38
	39	case _SC_TZNAME_MAX:
9cddf9de	40	return MAX (__tzname_max (), _POSIX_TZNAME_MAX);
28f540f4	41
036cc82f RM	42	case _SC_CHARCLASS_NAME_MAX:
	43	#ifdef CHARCLASS_NAME_MAX
	44	return CHARCLASS_NAME_MAX;
	45	#else
	46	return -1;
	47	#endif
	48
	49	case _SC_COLL_WEIGHTS_MAX:
	50	#ifdef COLL_WEIGHTS_MAX
	51	return COLL_WEIGHTS_MAX;
	52	#else
	53	return -1;
	54	#endif
	55
	56	case _SC_EQUIV_CLASS_MAX:
	57	#ifdef EQUIV_CLASS_MAX
	58	return EQUIV_CLASS_MAX;
	59	#else
	60	return -1;
	61	#endif
	62
	63	case _SC_2_LOCALEDEF:
	64	#ifdef _POSIX2_LOCALEDEF
	65	return _POSIX2_LOCALEDEF;
	66	#else
	67	return -1;
	68	#endif
	69
845dcb57 UD	70	case _SC_NPROCESSORS_CONF:
	71	return __get_nprocs_conf ();
	72
	73	case _SC_NPROCESSORS_ONLN:
	74	return __get_nprocs ();
	75
	76	case _SC_PHYS_PAGES:
	77	return __get_phys_pages ();
	78
	79	case _SC_AVPHYS_PAGES:
	80	return __get_avphys_pages ();
	81
	82	case _SC_ATEXIT_MAX:
	83	/* We have no limit since we use lists. */
	84	return INT_MAX;
	85
	86	case _SC_PASS_MAX:
	87	/* We have no limit but since the return value might be used to
	88	allocate a buffer we restrict the value. */
	89	return BUFSIZ;
	90
b5791037 UD	91	case _SC_CHAR_BIT:
	92	return CHAR_BIT;
	93
	94	case _SC_CHAR_MAX:
	95	return CHAR_MAX;
	96
	97	case _SC_CHAR_MIN:
	98	return CHAR_MIN;
	99
	100	case _SC_INT_MAX:
	101	return INT_MAX;
	102
	103	case _SC_INT_MIN:
	104	return INT_MIN;
	105
	106	case _SC_LONG_BIT:
	107	return sizeof (long int) * CHAR_BIT;
	108
	109	case _SC_WORD_BIT:
	110	return sizeof (int) * CHAR_BIT;
	111
	112	case _SC_MB_LEN_MAX:
	113	return MB_LEN_MAX;
	114
	115	case _SC_NZERO:
	116	return NZERO;
	117
	118	case _SC_SSIZE_MAX:
	119	return _POSIX_SSIZE_MAX;
	120
	121	case _SC_SCHAR_MAX:
	122	return SCHAR_MAX;
	123
	124	case _SC_SCHAR_MIN:
	125	return SCHAR_MIN;
	126
	127	case _SC_SHRT_MAX:
	128	return SHRT_MAX;
	129
	130	case _SC_SHRT_MIN:
	131	return SHRT_MIN;
	132
	133	case _SC_UCHAR_MAX:
	134	return UCHAR_MAX;
	135
	136	case _SC_UINT_MAX:
	137	return UINT_MAX;
	138
	139	case _SC_ULONG_MAX:
	140	return ULONG_MAX;
	141
	142	case _SC_USHRT_MAX:
	143	return USHRT_MAX;
	144
28f540f4 RM	145	case _SC_ARG_MAX:
	146	case _SC_CHILD_MAX:
	147	case _SC_CLK_TCK:
	148	case _SC_NGROUPS_MAX:
	149	case _SC_OPEN_MAX:
036cc82f	150	case _SC_STREAM_MAX:
28f540f4 RM	151	case _SC_JOB_CONTROL:
28f540f4 RM	152	case _SC_SAVED_IDS:
75cd5204 RM	153	case _SC_REALTIME_SIGNALS:
	154	case _SC_PRIORITY_SCHEDULING:
	155	case _SC_TIMERS:
	156	case _SC_ASYNCHRONOUS_IO:
	157	case _SC_PRIORITIZED_IO:
	158	case _SC_SYNCHRONIZED_IO:
	159	case _SC_FSYNC:
	160	case _SC_MAPPED_FILES:
	161	case _SC_MEMLOCK:
	162	case _SC_MEMLOCK_RANGE:
	163	case _SC_MEMORY_PROTECTION:
	164	case _SC_MESSAGE_PASSING:
	165	case _SC_SEMAPHORES:
	166	case _SC_SHARED_MEMORY_OBJECTS:
036cc82f	167
1f205a47	168	case _SC_AIO_LISTIO_MAX:
036cc82f RM	169	case _SC_AIO_MAX:
036cc82f RM	170	case _SC_AIO_PRIO_DELTA_MAX:
1f205a47	171	case _SC_DELAYTIMER_MAX:
036cc82f RM	172	case _SC_MQ_OPEN_MAX:
036cc82f RM	173	case _SC_MQ_PRIO_MAX:
28f540f4	174	case _SC_VERSION:
036cc82f RM	175	case _SC_PAGESIZE:
	176	case _SC_RTSIG_MAX:
	177	case _SC_SEM_NSEMS_MAX:
	178	case _SC_SEM_VALUE_MAX:
	179	case _SC_SIGQUEUE_MAX:
	180	case _SC_TIMER_MAX:
28f540f4	181
503054c0 RM	182	case _SC_PII:
	183	case _SC_PII_XTI:
	184	case _SC_PII_SOCKET:
	185	case _SC_PII_OSI:
	186	case _SC_POLL:
	187	case _SC_SELECT:
	188	case _SC_UIO_MAXIOV:
	189	case _SC_PII_INTERNET_STREAM:
	190	case _SC_PII_INTERNET_DGRAM:
	191	case _SC_PII_OSI_COTS:
	192	case _SC_PII_OSI_CLTS:
	193	case _SC_PII_OSI_M:
	194	case _SC_T_IOV_MAX:
	195
28f540f4 RM	196	case _SC_BC_BASE_MAX:
	197	case _SC_BC_DIM_MAX:
	198	case _SC_BC_SCALE_MAX:
	199	case _SC_BC_STRING_MAX:
28f540f4 RM	200	case _SC_EXPR_NEST_MAX:
	201	case _SC_LINE_MAX:
	202	case _SC_RE_DUP_MAX:
	203	case _SC_2_VERSION:
	204	case _SC_2_C_BIND:
	205	case _SC_2_C_DEV:
	206	case _SC_2_FORT_DEV:
	207	case _SC_2_SW_DEV:
b5791037 UD	208	case _SC_2_CHAR_TERM:
	209	case _SC_2_C_VERSION:
	210	case _SC_2_UPE:
28f540f4	211
23396375 UD	212	case _SC_THREADS:
	213	case _SC_THREAD_SAFE_FUNCTIONS:
	214	case _SC_GETGR_R_SIZE_MAX:
	215	case _SC_GETPW_R_SIZE_MAX:
	216	case _SC_LOGIN_NAME_MAX:
	217	case _SC_TTY_NAME_MAX:
	218	case _SC_THREAD_DESTRUCTOR_ITERATIONS:
	219	case _SC_THREAD_KEYS_MAX:
	220	case _SC_THREAD_STACK_MIN:
	221	case _SC_THREAD_THREADS_MAX:
	222	case _SC_THREAD_ATTR_STACKADDR:
	223	case _SC_THREAD_ATTR_STACKSIZE:
	224	case _SC_THREAD_PRIORITY_SCHEDULING:
	225	case _SC_THREAD_PRIO_INHERIT:
	226	case _SC_THREAD_PRIO_PROTECT:
	227	case _SC_THREAD_PROCESS_SHARED:
	228
845dcb57	229	case _SC_XOPEN_VERSION:
b5791037 UD	230	case _SC_XOPEN_XCU_VERSION:
	231	case _SC_XOPEN_UNIX:
	232	case _SC_XOPEN_CRYPT:
	233	case _SC_XOPEN_ENH_I18N:
	234	case _SC_XOPEN_SHM:
	235	case _SC_XOPEN_XPG2:
	236	case _SC_XOPEN_XPG3:
	237	case _SC_XOPEN_XPG4:
	238
	239	case _SC_NL_ARGMAX:
	240	case _SC_NL_LANGMAX:
	241	case _SC_NL_MSGMAX:
	242	case _SC_NL_NMAX:
	243	case _SC_NL_SETMAX:
	244	case _SC_NL_TEXTMAX:
845dcb57	245
9756dfe1 UD	246	case _SC_XBS5_ILP32_OFF32:
	247	case _SC_XBS5_ILP32_OFFBIG:
	248	case _SC_XBS5_LP64_OFF64:
	249	case _SC_XBS5_LPBIG_OFFBIG:
	250
	251	case _SC_XOPEN_LEGACY:
	252	case _SC_XOPEN_REALTIME:
	253	case _SC_XOPEN_REALTIME_THREADS:
	254
28f540f4 RM	255	break;
	256	}
	257
c4029823	258	__set_errno (ENOSYS);
28f540f4 RM	259	return -1;
	260	}
	261
	262	weak_alias (__sysconf, sysconf)
a20d8dbe	263	libc_hidden_def (__sysconf)
10ceac89 RM	264
10ceac89 RM	265	stub_warning (sysconf)
f2ea0f5b	266	#include <stub-tag.h>