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   sysconf.3p    ( 3 )

получить настраиваемые системные переменные (get configurable system variables)

Описание (Description)

The sysconf() function provides a method for the application to
       determine the current value of a configurable system limit or
       option (variable).  The implementation shall support all of the
       variables listed in the following table and may support others.

The name argument represents the system variable to be queried. The following table lists the minimal set of system variables from <limits.h> or <unistd.h> that can be returned by sysconf(), and the symbolic constants defined in <unistd.h> that are the corresponding values used for name.

┌─────────────────────────────────┬──────────────────────────────────┐ │ Variable Value of Name │ ├─────────────────────────────────┼──────────────────────────────────┤ │{AIO_LISTIO_MAX} │_SC_AIO_LISTIO_MAX │ │{AIO_MAX} │_SC_AIO_MAX │ │{AIO_PRIO_DELTA_MAX} │_SC_AIO_PRIO_DELTA_MAX │ │{ARG_MAX} │_SC_ARG_MAX │ │{ATEXIT_MAX} │_SC_ATEXIT_MAX │ │{BC_BASE_MAX} │_SC_BC_BASE_MAX │ │{BC_DIM_MAX} │_SC_BC_DIM_MAX │ │{BC_SCALE_MAX} │_SC_BC_SCALE_MAX │ │{BC_STRING_MAX} │_SC_BC_STRING_MAX │ │{CHILD_MAX} │_SC_CHILD_MAX │ │Clock ticks/second │_SC_CLK_TCK │ │{COLL_WEIGHTS_MAX} │_SC_COLL_WEIGHTS_MAX │ │{DELAYTIMER_MAX} │_SC_DELAYTIMER_MAX │ │{EXPR_NEST_MAX} │_SC_EXPR_NEST_MAX │ │{HOST_NAME_MAX} │_SC_HOST_NAME_MAX │ │{IOV_MAX} │_SC_IOV_MAX │ │{LINE_MAX} │_SC_LINE_MAX │ │{LOGIN_NAME_MAX} │_SC_LOGIN_NAME_MAX │ │{NGROUPS_MAX} │_SC_NGROUPS_MAX │ │Initial size of getgrgid_r() and │_SC_GETGR_R_SIZE_MAX │ │getgrnam_r() data buffers │ │ │Initial size of getpwuid_r() and │_SC_GETPW_R_SIZE_MAX │ │getpwnam_r() data buffers │ │ │{MQ_OPEN_MAX} │_SC_MQ_OPEN_MAX │ │{MQ_PRIO_MAX} │_SC_MQ_PRIO_MAX │ │{OPEN_MAX} │_SC_OPEN_MAX │ │{PAGE_SIZE} │_SC_PAGE_SIZE │ │{PAGESIZE} │_SC_PAGESIZE │ │{PTHREAD_DESTRUCTOR_ITERATIONS} │_SC_THREAD_DESTRUCTOR_ITERATIONS │ │{PTHREAD_KEYS_MAX} │_SC_THREAD_KEYS_MAX │ │{PTHREAD_STACK_MIN} │_SC_THREAD_STACK_MIN │ │{PTHREAD_THREADS_MAX} │_SC_THREAD_THREADS_MAX │ │{RE_DUP_MAX} │_SC_RE_DUP_MAX │ │{RTSIG_MAX} │_SC_RTSIG_MAX │ │{SEM_NSEMS_MAX} │_SC_SEM_NSEMS_MAX │ │{SEM_VALUE_MAX} │_SC_SEM_VALUE_MAX │ │{SIGQUEUE_MAX} │_SC_SIGQUEUE_MAX │ │{STREAM_MAX} │_SC_STREAM_MAX │ │{SYMLOOP_MAX} │_SC_SYMLOOP_MAX │ │{TIMER_MAX} │_SC_TIMER_MAX │ │{TTY_NAME_MAX} │_SC_TTY_NAME_MAX │ │{TZNAME_MAX} │_SC_TZNAME_MAX │ │_POSIX_ADVISORY_INFO │_SC_ADVISORY_INFO │ │_POSIX_BARRIERS │_SC_BARRIERS │ │_POSIX_ASYNCHRONOUS_IO │_SC_ASYNCHRONOUS_IO │ │_POSIX_CLOCK_SELECTION │_SC_CLOCK_SELECTION │ │_POSIX_CPUTIME │_SC_CPUTIME │ │_POSIX_FSYNC │_SC_FSYNC │ │_POSIX_IPV6 │_SC_IPV6 │ │_POSIX_JOB_CONTROL │_SC_JOB_CONTROL │ │_POSIX_MAPPED_FILES │_SC_MAPPED_FILES │ │_POSIX_MEMLOCK │_SC_MEMLOCK │ │_POSIX_MEMLOCK_RANGE │_SC_MEMLOCK_RANGE │ │_POSIX_MEMORY_PROTECTION │_SC_MEMORY_PROTECTION │ │_POSIX_MESSAGE_PASSING │_SC_MESSAGE_PASSING │ │_POSIX_MONOTONIC_CLOCK │_SC_MONOTONIC_CLOCK │ │_POSIX_PRIORITIZED_IO │_SC_PRIORITIZED_IO │ │_POSIX_PRIORITY_SCHEDULING │_SC_PRIORITY_SCHEDULING │ │_POSIX_RAW_SOCKETS │_SC_RAW_SOCKETS │ │_POSIX_READER_WRITER_LOCKS │_SC_READER_WRITER_LOCKS │ │_POSIX_REALTIME_SIGNALS │_SC_REALTIME_SIGNALS │ │_POSIX_REGEXP │_SC_REGEXP │ │_POSIX_SAVED_IDS │_SC_SAVED_IDS │ │_POSIX_SEMAPHORES │_SC_SEMAPHORES │ │_POSIX_SHARED_MEMORY_OBJECTS │_SC_SHARED_MEMORY_OBJECTS │ │_POSIX_SHELL │_SC_SHELL │ │_POSIX_SPAWN │_SC_SPAWN │ │_POSIX_SPIN_LOCKS │_SC_SPIN_LOCKS │ │_POSIX_SPORADIC_SERVER │_SC_SPORADIC_SERVER │ │_POSIX_SS_REPL_MAX │_SC_SS_REPL_MAX │ │_POSIX_SYNCHRONIZED_IO │_SC_SYNCHRONIZED_IO │ │_POSIX_THREAD_ATTR_STACKADDR │_SC_THREAD_ATTR_STACKADDR │ │_POSIX_THREAD_ATTR_STACKSIZE │_SC_THREAD_ATTR_STACKSIZE │ │_POSIX_THREAD_CPUTIME │_SC_THREAD_CPUTIME │ │_POSIX_THREAD_PRIO_INHERIT │_SC_THREAD_PRIO_INHERIT │ │_POSIX_THREAD_PRIO_PROTECT │_SC_THREAD_PRIO_PROTECT │ │_POSIX_THREAD_PRIORITY_SCHEDULING│_SC_THREAD_PRIORITY_SCHEDULING │ │_POSIX_THREAD_PROCESS_SHARED │_SC_THREAD_PROCESS_SHARED │ │_POSIX_THREAD_ROBUST_PRIO_INHERIT│_SC_THREAD_ROBUST_PRIO_INHERIT │ │_POSIX_THREAD_ROBUST_PRIO_PROTECT│_SC_THREAD_ROBUST_PRIO_PROTECT │ │_POSIX_THREAD_SAFE_FUNCTIONS │_SC_THREAD_SAFE_FUNCTIONS │ │_POSIX_THREAD_SPORADIC_SERVER │_SC_THREAD_SPORADIC_SERVER │ │_POSIX_THREADS │_SC_THREADS │ │_POSIX_TIMEOUTS │_SC_TIMEOUTS │ └─────────────────────────────────┴──────────────────────────────────┘ ┌─────────────────────────────┬─────────────────────────────┐ │ Variable Value of Name │ ├─────────────────────────────┼─────────────────────────────┤ │_POSIX_TIMERS │_SC_TIMERS │ │_POSIX_TRACE │_SC_TRACE │ │_POSIX_TRACE_EVENT_FILTER │_SC_TRACE_EVENT_FILTER │ │_POSIX_TRACE_EVENT_NAME_MAX │_SC_TRACE_EVENT_NAME_MAX │ │_POSIX_TRACE_INHERIT │_SC_TRACE_INHERIT │ │_POSIX_TRACE_LOG │_SC_TRACE_LOG │ │_POSIX_TRACE_NAME_MAX │_SC_TRACE_NAME_MAX │ │_POSIX_TRACE_SYS_MAX │_SC_TRACE_SYS_MAX │ │_POSIX_TRACE_USER_EVENT_MAX │_SC_TRACE_USER_EVENT_MAX │ │_POSIX_TYPED_MEMORY_OBJECTS │_SC_TYPED_MEMORY_OBJECTS │ │_POSIX_VERSION │_SC_VERSION │ │_POSIX_V7_ILP32_OFF32 │_SC_V7_ILP32_OFF32 │ │_POSIX_V7_ILP32_OFFBIG │_SC_V7_ILP32_OFFBIG │ │_POSIX_V7_LP64_OFF64 │_SC_V7_LP64_OFF64 │ │_POSIX_V7_LPBIG_OFFBIG │_SC_V7_LPBIG_OFFBIG │ │_POSIX_V6_ILP32_OFF32 │_SC_V6_ILP32_OFF32 │ │_POSIX_V6_ILP32_OFFBIG │_SC_V6_ILP32_OFFBIG │ │_POSIX_V6_LP64_OFF64 │_SC_V6_LP64_OFF64 │ │_POSIX_V6_LPBIG_OFFBIG │_SC_V6_LPBIG_OFFBIG │ │_POSIX2_C_BIND │_SC_2_C_BIND │ │_POSIX2_C_DEV │_SC_2_C_DEV │ │_POSIX2_CHAR_TERM │_SC_2_CHAR_TERM │ │_POSIX2_FORT_DEV │_SC_2_FORT_DEV │ │_POSIX2_FORT_RUN │_SC_2_FORT_RUN │ │_POSIX2_LOCALEDEF │_SC_2_LOCALEDEF │ │_POSIX2_PBS │_SC_2_PBS │ │_POSIX2_PBS_ACCOUNTING │_SC_2_PBS_ACCOUNTING │ │_POSIX2_PBS_CHECKPOINT │_SC_2_PBS_CHECKPOINT │ │_POSIX2_PBS_LOCATE │_SC_2_PBS_LOCATE │ │_POSIX2_PBS_MESSAGE │_SC_2_PBS_MESSAGE │ │_POSIX2_PBS_TRACK │_SC_2_PBS_TRACK │ │_POSIX2_SW_DEV │_SC_2_SW_DEV │ │_POSIX2_UPE │_SC_2_UPE │ │_POSIX2_VERSION │_SC_2_VERSION │ │_XOPEN_CRYPT │_SC_XOPEN_CRYPT │ │_XOPEN_ENH_I18N │_SC_XOPEN_ENH_I18N │ │_XOPEN_REALTIME │_SC_XOPEN_REALTIME │ │_XOPEN_REALTIME_THREADS │_SC_XOPEN_REALTIME_THREADS │ │_XOPEN_SHM │_SC_XOPEN_SHM │ │_XOPEN_STREAMS │_SC_XOPEN_STREAMS │ │_XOPEN_UNIX │_SC_XOPEN_UNIX │ │_XOPEN_UUCP │_SC_XOPEN_UUCP │ │_XOPEN_VERSION │_SC_XOPEN_VERSION │ └─────────────────────────────┴─────────────────────────────┘