Mark Overmeer > POSIX-1003-0.94_2 > POSIX::1003::Sysconf

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Module Version: 0.94_2   Source   Latest Release: POSIX-1003-0.98

NAME ^

POSIX::1003::Sysconf - POSIX access to sysconf()

INHERITANCE ^

 POSIX::1003::Sysconf
   is a POSIX::1003::Module

SYNOPSIS ^

  use POSIX::1003::Sysconf; # load all names

  use POSIX::1003::Sysconf qw(sysconf);
  # keys are strings!
  $ticks = sysconf('_SC_CLK_TCK');

  use POSIX::1003::Sysconf qw(sysconf _SC_CLK_TCK);
  $ticks  = _SC_CLK_TCK;   # constants are subs

  use POSIX::1003::Sysconf '%sysconf';
  my $key = $sysconf{_SC_CLK_TCK};
  $sysconf{_SC_NEW_KEY} = $key_code;
  $ticks  = sysconf($key);

  print "$_\n" for keys %sysconf;

DESCRIPTION ^

The sysconf() interface can be used to query system information in numerical form, where confstr() returns strings.

See documentation in base class.

METHODS ^

See documentation in base class.

POSIX::1003::Sysconf->exampleValue(NAME)

See "METHODS" in POSIX::1003::Module

$obj->import()

See "METHODS" in POSIX::1003::Module

FUNCTIONS ^

Standard POSIX

sysconf(NAME)

Returns the sysconf value related to the NAMEd constant. The NAME must be a string. undef will be returned when the NAME is not known by the system.

example:

  my $ticks = sysconf('_SC_CLK_TCK') || 1000;

Additional

sysconf_names()

Returns a list with all known names, unsorted.

CONSTANTS ^

%sysconf

This exported variable is a tied HASH which maps _SC_* names on unique numbers, to be used with the system's sysconf() function.

The following constants where detected on your system when the module got installed. The second column shows the value which where returned at that time.

  _SC_2_C_BIND                      200809
  _SC_2_C_DEV                       200809
  _SC_2_C_VERSION                   undef
  _SC_2_CHAR_TERM                   200809
  _SC_2_FORT_DEV                    undef
  _SC_2_FORT_RUN                    undef
  _SC_2_LOCALEDEF                   200809
  _SC_2_PBS                         undef
  _SC_2_PBS_ACCOUNTING              undef
  _SC_2_PBS_CHECKPOINT              undef
  _SC_2_PBS_LOCATE                  undef
  _SC_2_PBS_MESSAGE                 undef
  _SC_2_PBS_TRACK                   undef
  _SC_2_SW_DEV                      200809
  _SC_2_UPE                         undef
  _SC_2_VERSION                     200809
  _SC_ADVISORY_INFO                 200809
  _SC_AIO_LISTIO_MAX                undef
  _SC_AIO_MAX                       undef
  _SC_AIO_PRIO_DELTA_MAX            20
  _SC_ARG_MAX                       2097152
  _SC_ASYNCHRONOUS_IO               200809
  _SC_ATEXIT_MAX                    2147483647
  _SC_AVPHYS_PAGES                  125285
  _SC_BARRIERS                      200809
  _SC_BASE                          undef
  _SC_BC_BASE_MAX                   99
  _SC_BC_DIM_MAX                    2048
  _SC_BC_SCALE_MAX                  99
  _SC_BC_STRING_MAX                 1000
  _SC_C_LANG_SUPPORT                undef
  _SC_C_LANG_SUPPORT_R              undef
  _SC_CHAR_BIT                      8
  _SC_CHAR_MAX                      127
  _SC_CHAR_MIN                      -128
  _SC_CHARCLASS_NAME_MAX            2048
  _SC_CHILD_MAX                     61461
  _SC_CLK_TCK                       100
  _SC_CLOCK_SELECTION               200809
  _SC_COLL_WEIGHTS_MAX              255
  _SC_CPUTIME                       200809
  _SC_DELAYTIMER_MAX                2147483647
  _SC_DEVICE_IO                     undef
  _SC_DEVICE_SPECIFIC               undef
  _SC_DEVICE_SPECIFIC_R             undef
  _SC_EQUIV_CLASS_MAX               undef
  _SC_EXPR_NEST_MAX                 32
  _SC_FD_MGMT                       undef
  _SC_FIFO                          undef
  _SC_FILE_ATTRIBUTES               undef
  _SC_FILE_LOCKING                  undef
  _SC_FILE_SYSTEM                   undef
  _SC_FSYNC                         200809
  _SC_GETGR_R_SIZE_MAX              1024
  _SC_GETPW_R_SIZE_MAX              1024
  _SC_HOST_NAME_MAX                 64
  _SC_INT_MAX                       2147483647
  _SC_INT_MIN                       -2147483648
  _SC_IOV_MAX                       1024
  _SC_IPV6                          200809
  _SC_JOB_CONTROL                   1
  _SC_LEVEL1_DCACHE_ASSOC           8
  _SC_LEVEL1_DCACHE_LINESIZE        64
  _SC_LEVEL1_DCACHE_SIZE            32768
  _SC_LEVEL1_ICACHE_ASSOC           8
  _SC_LEVEL1_ICACHE_LINESIZE        64
  _SC_LEVEL1_ICACHE_SIZE            32768
  _SC_LEVEL2_CACHE_ASSOC            8
  _SC_LEVEL2_CACHE_LINESIZE         64
  _SC_LEVEL2_CACHE_SIZE             262144
  _SC_LEVEL3_CACHE_ASSOC            12
  _SC_LEVEL3_CACHE_LINESIZE         64
  _SC_LEVEL3_CACHE_SIZE             6291456
  _SC_LEVEL4_CACHE_ASSOC            0
  _SC_LEVEL4_CACHE_LINESIZE         0
  _SC_LEVEL4_CACHE_SIZE             0
  _SC_LINE_MAX                      2048
  _SC_LOGIN_NAME_MAX                256
  _SC_LONG_BIT                      64
  _SC_MAPPED_FILES                  200809
  _SC_MB_LEN_MAX                    16
  _SC_MEMLOCK                       200809
  _SC_MEMLOCK_RANGE                 200809
  _SC_MEMORY_PROTECTION             200809
  _SC_MESSAGE_PASSING               200809
  _SC_MONOTONIC_CLOCK               200809
  _SC_MQ_OPEN_MAX                   undef
  _SC_MQ_PRIO_MAX                   32768
  _SC_MULTI_PROCESS                 undef
  _SC_NETWORKING                    undef
  _SC_NGROUPS_MAX                   65536
  _SC_NL_ARGMAX                     4096
  _SC_NL_LANGMAX                    2048
  _SC_NL_MSGMAX                     2147483647
  _SC_NL_NMAX                       2147483647
  _SC_NL_SETMAX                     2147483647
  _SC_NL_TEXTMAX                    2147483647
  _SC_NPROCESSORS_CONF              4
  _SC_NPROCESSORS_ONLN              4
  _SC_NZERO                         20
  _SC_OPEN_MAX                      1024
  _SC_PAGE_SIZE                     4096
  _SC_PAGESIZE                      4096
  _SC_PASS_MAX                      8192
  _SC_PHYS_PAGES                    1971261
  _SC_PII                           undef
  _SC_PII_INTERNET                  undef
  _SC_PII_INTERNET_DGRAM            undef
  _SC_PII_INTERNET_STREAM           undef
  _SC_PII_OSI                       undef
  _SC_PII_OSI_CLTS                  undef
  _SC_PII_OSI_COTS                  undef
  _SC_PII_OSI_M                     undef
  _SC_PII_SOCKET                    undef
  _SC_PII_XTI                       undef
  _SC_PIPE                          undef
  _SC_POLL                          undef
  _SC_PRIORITIZED_IO                200809
  _SC_PRIORITY_SCHEDULING           200809
  _SC_RAW_SOCKETS                   200809
  _SC_RE_DUP_MAX                    32767
  _SC_READER_WRITER_LOCKS           200809
  _SC_REALTIME_SIGNALS              200809
  _SC_REGEX_VERSION                 undef
  _SC_REGEXP                        1
  _SC_RTSIG_MAX                     32
  _SC_SAVED_IDS                     1
  _SC_SCHAR_MAX                     127
  _SC_SCHAR_MIN                     -128
  _SC_SELECT                        undef
  _SC_SEM_NSEMS_MAX                 undef
  _SC_SEM_VALUE_MAX                 2147483647
  _SC_SEMAPHORES                    200809
  _SC_SHARED_MEMORY_OBJECTS         200809
  _SC_SHELL                         1
  _SC_SHRT_MAX                      32767
  _SC_SHRT_MIN                      -32768
  _SC_SIGNALS                       undef
  _SC_SIGQUEUE_MAX                  61461
  _SC_SINGLE_PROCESS                undef
  _SC_SPAWN                         200809
  _SC_SPIN_LOCKS                    200809
  _SC_SPORADIC_SERVER               undef
  _SC_SS_REPL_MAX                   undef
  _SC_SSIZE_MAX                     32767
  _SC_STREAM_MAX                    16
  _SC_STREAMS                       undef
  _SC_SYMLOOP_MAX                   undef
  _SC_SYNCHRONIZED_IO               200809
  _SC_SYSTEM_DATABASE               undef
  _SC_SYSTEM_DATABASE_R             undef
  _SC_T_IOV_MAX                     undef
  _SC_THREAD_ATTR_STACKADDR         200809
  _SC_THREAD_ATTR_STACKSIZE         200809
  _SC_THREAD_CPUTIME                200809
  _SC_THREAD_DESTRUCTOR_ITERATIONS  4
  _SC_THREAD_KEYS_MAX               1024
  _SC_THREAD_PRIO_INHERIT           200809
  _SC_THREAD_PRIO_PROTECT           200809
  _SC_THREAD_PRIORITY_SCHEDULING    200809
  _SC_THREAD_PROCESS_SHARED         200809
  _SC_THREAD_ROBUST_PRIO_INHERIT    undef
  _SC_THREAD_ROBUST_PRIO_PROTECT    undef
  _SC_THREAD_SAFE_FUNCTIONS         200809
  _SC_THREAD_SPORADIC_SERVER        undef
  _SC_THREAD_STACK_MIN              16384
  _SC_THREAD_THREADS_MAX            undef
  _SC_THREADS                       200809
  _SC_TIMEOUTS                      200809
  _SC_TIMER_MAX                     undef
  _SC_TIMERS                        200809
  _SC_TRACE                         undef
  _SC_TRACE_EVENT_FILTER            undef
  _SC_TRACE_EVENT_NAME_MAX          undef
  _SC_TRACE_INHERIT                 undef
  _SC_TRACE_LOG                     undef
  _SC_TRACE_NAME_MAX                undef
  _SC_TRACE_SYS_MAX                 undef
  _SC_TRACE_USER_EVENT_MAX          undef
  _SC_TTY_NAME_MAX                  32
  _SC_TYPED_MEMORY_OBJECTS          undef
  _SC_TZNAME_MAX                    6
  _SC_UCHAR_MAX                     255
  _SC_UINT_MAX                      4294967295
  _SC_UIO_MAXIOV                    1024
  _SC_ULONG_MAX                     undef
  _SC_USER_GROUPS                   undef
  _SC_USER_GROUPS_R                 undef
  _SC_USHRT_MAX                     65535
  _SC_V6_ILP32_OFF32                undef
  _SC_V6_ILP32_OFFBIG               undef
  _SC_V6_LP64_OFF64                 1
  _SC_V6_LPBIG_OFFBIG               undef
  _SC_V7_ILP32_OFF32                undef
  _SC_V7_ILP32_OFFBIG               undef
  _SC_V7_LP64_OFF64                 1
  _SC_V7_LPBIG_OFFBIG               undef
  _SC_VERSION                       200809
  _SC_WORD_BIT                      32
  _SC_XBS5_ILP32_OFF32              undef
  _SC_XBS5_ILP32_OFFBIG             undef
  _SC_XBS5_LP64_OFF64               1
  _SC_XBS5_LPBIG_OFFBIG             undef
  _SC_XOPEN_CRYPT                   1
  _SC_XOPEN_ENH_I18N                1
  _SC_XOPEN_LEGACY                  1
  _SC_XOPEN_REALTIME                1
  _SC_XOPEN_REALTIME_THREADS        1
  _SC_XOPEN_SHM                     1
  _SC_XOPEN_STREAMS                 undef
  _SC_XOPEN_UNIX                    1
  _SC_XOPEN_VERSION                 700
  _SC_XOPEN_XCU_VERSION             4
  _SC_XOPEN_XPG2                    1
  _SC_XOPEN_XPG3                    1
  _SC_XOPEN_XPG4                    1

SEE ALSO ^

This module is part of POSIX-1003 distribution version 0.94_2, built on May 17, 2013. Website: http://perl.overmeer.net. The code is based on POSIX, which is released with Perl itself. See also POSIX::Util for additional functionality.

COPYRIGHTS ^

Copyrights 2011-2013 on the perl code and the related documentation by [Mark Overmeer]. For other contributors see ChangeLog.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html

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