[thirdparty/glibc.git] / posix / sysconf.c

/* Copyright (C) 1991,1993,1995-1997,2001,2002,2003
   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 <grp.h>
#include <pwd.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_GETGR_R_SIZE_MAX:
      return NSS_BUFLEN_GROUP;

    case _SC_GETPW_R_SIZE_MAX:
      return NSS_BUFLEN_PASSWD;

    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_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
609b4783 UD	1	/* Copyright (C) 1991,1993,1995-1997,2001,2002,2003
609b4783 UD	2	Free Software Foundation, Inc.
b5791037	3	This file is part of the GNU C Library.
28f540f4	4
b5791037	5	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
28f540f4	9
b5791037 UD	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	13	Lesser General Public License for more details.
28f540f4	14
41bdb6e2 AJ	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, write to the Free
	17	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	18	02111-1307 USA. */
28f540f4	19
28f540f4	20	#include <errno.h>
ab5f7c45 RM	21	#include <grp.h>
ab5f7c45 RM	22	#include <pwd.h>
845dcb57	23	#include <stdio.h>
28f540f4 RM	24	#include <unistd.h>
	25	#include <time.h>
	26	#include <limits.h>
9cddf9de	27	#include <sys/param.h>
845dcb57	28	#include <sys/sysinfo.h>
28f540f4 RM	29
	30
	31	/* Get the value of the system variable NAME. */
	32	long int
036cc82f RM	33	__sysconf (name)
036cc82f RM	34	int name;
28f540f4 RM	35	{
	36	switch (name)
	37	{
	38	default:
c4029823	39	__set_errno (EINVAL);
28f540f4 RM	40	return -1;
	41
	42	case _SC_TZNAME_MAX:
9cddf9de	43	return MAX (__tzname_max (), _POSIX_TZNAME_MAX);
28f540f4	44
036cc82f RM	45	case _SC_CHARCLASS_NAME_MAX:
	46	#ifdef CHARCLASS_NAME_MAX
	47	return CHARCLASS_NAME_MAX;
	48	#else
	49	return -1;
	50	#endif
	51
	52	case _SC_COLL_WEIGHTS_MAX:
	53	#ifdef COLL_WEIGHTS_MAX
	54	return COLL_WEIGHTS_MAX;
	55	#else
	56	return -1;
	57	#endif
	58
	59	case _SC_EQUIV_CLASS_MAX:
	60	#ifdef EQUIV_CLASS_MAX
	61	return EQUIV_CLASS_MAX;
	62	#else
	63	return -1;
	64	#endif
	65
	66	case _SC_2_LOCALEDEF:
	67	#ifdef _POSIX2_LOCALEDEF
	68	return _POSIX2_LOCALEDEF;
	69	#else
	70	return -1;
	71	#endif
	72
845dcb57 UD	73	case _SC_NPROCESSORS_CONF:
	74	return __get_nprocs_conf ();
	75
	76	case _SC_NPROCESSORS_ONLN:
	77	return __get_nprocs ();
	78
	79	case _SC_PHYS_PAGES:
	80	return __get_phys_pages ();
	81
	82	case _SC_AVPHYS_PAGES:
	83	return __get_avphys_pages ();
	84
	85	case _SC_ATEXIT_MAX:
	86	/* We have no limit since we use lists. */
	87	return INT_MAX;
	88
	89	case _SC_PASS_MAX:
	90	/* We have no limit but since the return value might be used to
	91	allocate a buffer we restrict the value. */
	92	return BUFSIZ;
	93
b5791037 UD	94	case _SC_CHAR_BIT:
	95	return CHAR_BIT;
	96
	97	case _SC_CHAR_MAX:
	98	return CHAR_MAX;
	99
	100	case _SC_CHAR_MIN:
	101	return CHAR_MIN;
	102
	103	case _SC_INT_MAX:
	104	return INT_MAX;
	105
	106	case _SC_INT_MIN:
	107	return INT_MIN;
	108
	109	case _SC_LONG_BIT:
	110	return sizeof (long int) * CHAR_BIT;
	111
	112	case _SC_WORD_BIT:
	113	return sizeof (int) * CHAR_BIT;
	114
	115	case _SC_MB_LEN_MAX:
	116	return MB_LEN_MAX;
	117
	118	case _SC_NZERO:
	119	return NZERO;
	120
	121	case _SC_SSIZE_MAX:
	122	return _POSIX_SSIZE_MAX;
	123
	124	case _SC_SCHAR_MAX:
	125	return SCHAR_MAX;
	126
	127	case _SC_SCHAR_MIN:
	128	return SCHAR_MIN;
	129
	130	case _SC_SHRT_MAX:
	131	return SHRT_MAX;
	132
	133	case _SC_SHRT_MIN:
	134	return SHRT_MIN;
	135
	136	case _SC_UCHAR_MAX:
	137	return UCHAR_MAX;
	138
	139	case _SC_UINT_MAX:
	140	return UINT_MAX;
	141
	142	case _SC_ULONG_MAX:
	143	return ULONG_MAX;
	144
	145	case _SC_USHRT_MAX:
	146	return USHRT_MAX;
	147
609b4783 UD	148	case _SC_GETGR_R_SIZE_MAX:
	149	return NSS_BUFLEN_GROUP;
	150
	151	case _SC_GETPW_R_SIZE_MAX:
	152	return NSS_BUFLEN_PASSWD;
	153
28f540f4 RM	154	case _SC_ARG_MAX:
	155	case _SC_CHILD_MAX:
	156	case _SC_CLK_TCK:
	157	case _SC_NGROUPS_MAX:
	158	case _SC_OPEN_MAX:
036cc82f	159	case _SC_STREAM_MAX:
28f540f4 RM	160	case _SC_JOB_CONTROL:
28f540f4 RM	161	case _SC_SAVED_IDS:
75cd5204 RM	162	case _SC_REALTIME_SIGNALS:
	163	case _SC_PRIORITY_SCHEDULING:
	164	case _SC_TIMERS:
	165	case _SC_ASYNCHRONOUS_IO:
	166	case _SC_PRIORITIZED_IO:
	167	case _SC_SYNCHRONIZED_IO:
	168	case _SC_FSYNC:
	169	case _SC_MAPPED_FILES:
	170	case _SC_MEMLOCK:
	171	case _SC_MEMLOCK_RANGE:
	172	case _SC_MEMORY_PROTECTION:
	173	case _SC_MESSAGE_PASSING:
	174	case _SC_SEMAPHORES:
	175	case _SC_SHARED_MEMORY_OBJECTS:
036cc82f	176
1f205a47	177	case _SC_AIO_LISTIO_MAX:
036cc82f RM	178	case _SC_AIO_MAX:
036cc82f RM	179	case _SC_AIO_PRIO_DELTA_MAX:
1f205a47	180	case _SC_DELAYTIMER_MAX:
036cc82f RM	181	case _SC_MQ_OPEN_MAX:
036cc82f RM	182	case _SC_MQ_PRIO_MAX:
28f540f4	183	case _SC_VERSION:
036cc82f RM	184	case _SC_PAGESIZE:
	185	case _SC_RTSIG_MAX:
	186	case _SC_SEM_NSEMS_MAX:
	187	case _SC_SEM_VALUE_MAX:
	188	case _SC_SIGQUEUE_MAX:
	189	case _SC_TIMER_MAX:
28f540f4	190
503054c0 RM	191	case _SC_PII:
	192	case _SC_PII_XTI:
	193	case _SC_PII_SOCKET:
	194	case _SC_PII_OSI:
	195	case _SC_POLL:
	196	case _SC_SELECT:
	197	case _SC_UIO_MAXIOV:
	198	case _SC_PII_INTERNET_STREAM:
	199	case _SC_PII_INTERNET_DGRAM:
	200	case _SC_PII_OSI_COTS:
	201	case _SC_PII_OSI_CLTS:
	202	case _SC_PII_OSI_M:
	203	case _SC_T_IOV_MAX:
	204
28f540f4 RM	205	case _SC_BC_BASE_MAX:
	206	case _SC_BC_DIM_MAX:
	207	case _SC_BC_SCALE_MAX:
	208	case _SC_BC_STRING_MAX:
28f540f4 RM	209	case _SC_EXPR_NEST_MAX:
	210	case _SC_LINE_MAX:
	211	case _SC_RE_DUP_MAX:
	212	case _SC_2_VERSION:
	213	case _SC_2_C_BIND:
	214	case _SC_2_C_DEV:
	215	case _SC_2_FORT_DEV:
	216	case _SC_2_SW_DEV:
b5791037 UD	217	case _SC_2_CHAR_TERM:
	218	case _SC_2_C_VERSION:
	219	case _SC_2_UPE:
28f540f4	220
23396375 UD	221	case _SC_THREADS:
23396375 UD	222	case _SC_THREAD_SAFE_FUNCTIONS:
23396375 UD	223	case _SC_LOGIN_NAME_MAX:
	224	case _SC_TTY_NAME_MAX:
	225	case _SC_THREAD_DESTRUCTOR_ITERATIONS:
	226	case _SC_THREAD_KEYS_MAX:
	227	case _SC_THREAD_STACK_MIN:
	228	case _SC_THREAD_THREADS_MAX:
	229	case _SC_THREAD_ATTR_STACKADDR:
	230	case _SC_THREAD_ATTR_STACKSIZE:
	231	case _SC_THREAD_PRIORITY_SCHEDULING:
	232	case _SC_THREAD_PRIO_INHERIT:
	233	case _SC_THREAD_PRIO_PROTECT:
	234	case _SC_THREAD_PROCESS_SHARED:
	235
845dcb57	236	case _SC_XOPEN_VERSION:
b5791037 UD	237	case _SC_XOPEN_XCU_VERSION:
	238	case _SC_XOPEN_UNIX:
	239	case _SC_XOPEN_CRYPT:
	240	case _SC_XOPEN_ENH_I18N:
	241	case _SC_XOPEN_SHM:
	242	case _SC_XOPEN_XPG2:
	243	case _SC_XOPEN_XPG3:
	244	case _SC_XOPEN_XPG4:
	245
	246	case _SC_NL_ARGMAX:
	247	case _SC_NL_LANGMAX:
	248	case _SC_NL_MSGMAX:
	249	case _SC_NL_NMAX:
	250	case _SC_NL_SETMAX:
	251	case _SC_NL_TEXTMAX:
845dcb57	252
9756dfe1 UD	253	case _SC_XBS5_ILP32_OFF32:
	254	case _SC_XBS5_ILP32_OFFBIG:
	255	case _SC_XBS5_LP64_OFF64:
	256	case _SC_XBS5_LPBIG_OFFBIG:
	257
	258	case _SC_XOPEN_LEGACY:
	259	case _SC_XOPEN_REALTIME:
	260	case _SC_XOPEN_REALTIME_THREADS:
	261
28f540f4 RM	262	break;
	263	}
	264
c4029823	265	__set_errno (ENOSYS);
28f540f4 RM	266	return -1;
	267	}
	268
	269	weak_alias (__sysconf, sysconf)
a20d8dbe	270	libc_hidden_def (__sysconf)
10ceac89 RM	271
10ceac89 RM	272	stub_warning (sysconf)
f2ea0f5b	273	#include <stub-tag.h>