diff options
Diffstat (limited to 'libc/unistd/sysconf.c')
| -rw-r--r-- | libc/unistd/sysconf.c | 855 |
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 + } +} + |