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Diffstat (limited to 'posix/sysconf.c')
| -rw-r--r-- | posix/sysconf.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/posix/sysconf.c b/posix/sysconf.c new file mode 100644 index 0000000000..f22685cb29 --- /dev/null +++ b/posix/sysconf.c @@ -0,0 +1,273 @@ +/* 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> |