NAME
POSIX::1003::Sysconf - POSIX access to sysconf()
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.
METHODS
FUNCTIONS
Standard POSIX
- sysconf(NAME)
-
Returns the sysconf value related to the NAMEd constant. The NAME must be a string.
undefwill be returned when the NAME is not known by the system.example:
my $ticks = sysconf('_SC_CLK_TCK') || 1000;
Additional
CONSTANTS
- %sysconf
-
This exported variable is a tied HASH which maps
_SC_*names on unique numbers, to be used with the system'ssysconf()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 165857
_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 1SEE ALSO
This module is part of POSIX-1003 distribution version 0.94_1, built on May 16, 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