POSIX::1003::Sysconf - POSIX access to sysconf()
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;
The sysconf() interface can be used to query system information in numerical form, where confstr() returns strings.
sysconf()
confstr()
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.
undef
example:
my $ticks = sysconf('_SC_CLK_TCK') || 1000;
Returns a list with all known names, unsorted.
This exported variable is a tied HASH which maps _SC_* names on unique numbers, to be used with the system's sysconf() function.
_SC_*
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 1
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 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
To install POSIX::1003, copy and paste the appropriate command in to your terminal.
cpanm
cpanm POSIX::1003
CPAN shell
perl -MCPAN -e shell install POSIX::1003
For more information on module installation, please visit the detailed CPAN module installation guide.