/* sysconf.cc Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Red Hat, Inc. This file is part of Cygwin. This software is a copyrighted work licensed under the terms of the Cygwin license. Please consult the file "CYGWIN_LICENSE" for details. */ #include "winsup.h" #include #include #include #include #include "cygerrno.h" #include "security.h" #include "path.h" #include "fhandler.h" #include "dtable.h" #include "cygheap.h" #include "ntdll.h" static long get_open_max (int in) { long max = getdtablesize (); if (max < OPEN_MAX) max = OPEN_MAX; return max; } static long get_page_size (int in) { return getpagesize (); } static long get_nproc_values (int in) { NTSTATUS ret; SYSTEM_BASIC_INFORMATION sbi; if ((ret = NtQuerySystemInformation (SystemBasicInformation, (PVOID) &sbi, sizeof sbi, NULL)) != STATUS_SUCCESS) { __seterrno_from_nt_status (ret); debug_printf ("NtQuerySystemInformation: ret %d, Dos(ret) %E", ret); return -1; } switch (in) { case _SC_NPROCESSORS_CONF: return sbi.NumberProcessors; case _SC_NPROCESSORS_ONLN: { int i = 0; do if (sbi.ActiveProcessors & 1) i++; while (sbi.ActiveProcessors >>= 1); return i; } case _SC_PHYS_PAGES: return sbi.NumberOfPhysicalPages / (getpagesize () / getsystempagesize ()); } return -1; } static long get_avphys (int in) { NTSTATUS ret; SYSTEM_PERFORMANCE_INFORMATION spi; if ((ret = NtQuerySystemInformation (SystemPerformanceInformation, (PVOID) &spi, sizeof spi, NULL)) != STATUS_SUCCESS) { __seterrno_from_nt_status (ret); debug_printf ("NtQuerySystemInformation: ret %d, Dos(ret) %E", ret); return -1; } return spi.AvailablePages / (getpagesize () / getsystempagesize ()); } enum sc_type { nsup, cons, func }; static struct { sc_type type; union { long c; long (*f)(int); }; } sca[] = { {cons, {c:ARG_MAX}}, /* 0, _SC_ARG_MAX */ {cons, {c:CHILD_MAX}}, /* 1, _SC_CHILD_MAX */ {cons, {c:CLOCKS_PER_SEC}}, /* 2, _SC_CLK_TCK */ {cons, {c:NGROUPS_MAX}}, /* 3, _SC_NGROUPS_MAX */ {func, {f:get_open_max}}, /* 4, _SC_OPEN_MAX */ {cons, {c:_POSIX_JOB_CONTROL}}, /* 5, _SC_JOB_CONTROL */ {cons, {c:_POSIX_SAVED_IDS}}, /* 6, _SC_SAVED_IDS */ {cons, {c:_POSIX_VERSION}}, /* 7, _SC_VERSION */ {func, {f:get_page_size}}, /* 8, _SC_PAGESIZE */ {func, {f:get_nproc_values}}, /* 9, _SC_NPROCESSORS_CONF */ {func, {f:get_nproc_values}}, /* 10, _SC_NPROCESSORS_ONLN */ {func, {f:get_nproc_values}}, /* 11, _SC_PHYS_PAGES */ {func, {f:get_avphys}}, /* 12, _SC_AVPHYS_PAGES */ {cons, {c:MQ_OPEN_MAX}}, /* 13, _SC_MQ_OPEN_MAX */ {cons, {c:MQ_PRIO_MAX}}, /* 14, _SC_MQ_PRIO_MAX */ {cons, {c:RTSIG_MAX}}, /* 15, _SC_RTSIG_MAX */ {cons, {c:-1L}}, /* 16, _SC_SEM_NSEMS_MAX */ {cons, {c:SEM_VALUE_MAX}}, /* 17, _SC_SEM_VALUE_MAX */ {cons, {c:SIGQUEUE_MAX}}, /* 18, _SC_SIGQUEUE_MAX */ {cons, {c:TIMER_MAX}}, /* 19, _SC_TIMER_MAX */ {nsup, {c:0}}, /* 20, _SC_TZNAME_MAX */ {cons, {c:-1L}}, /* 21, _SC_ASYNCHRONOUS_IO */ {cons, {c:_POSIX_FSYNC}}, /* 22, _SC_FSYNC */ {cons, {c:_POSIX_MAPPED_FILES}}, /* 23, _SC_MAPPED_FILES */ {cons, {c:-1L}}, /* 24, _SC_MEMLOCK */ {cons, {c:_POSIX_MEMLOCK_RANGE}}, /* 25, _SC_MEMLOCK_RANGE */ {cons, {c:_POSIX_MEMORY_PROTECTION}}, /* 26, _SC_MEMORY_PROTECTION */ {cons, {c:_POSIX_MESSAGE_PASSING}}, /* 27, _SC_MESSAGE_PASSING */ {cons, {c:-1L}}, /* 28, _SC_PRIORITIZED_IO */ {cons, {c:_POSIX_REALTIME_SIGNALS}}, /* 29, _SC_REALTIME_SIGNALS */ {cons, {c:_POSIX_SEMAPHORES}}, /* 30, _SC_SEMAPHORES */ {cons, {c:_POSIX_SHARED_MEMORY_OBJECTS}}, /* 31, _SC_SHARED_MEMORY_OBJECTS */ {cons, {c:_POSIX_SYNCHRONIZED_IO}}, /* 32, _SC_SYNCHRONIZED_IO */ {cons, {c:_POSIX_TIMERS}}, /* 33, _SC_TIMERS */ {nsup, {c:0}}, /* 34, _SC_AIO_LISTIO_MAX */ {nsup, {c:0}}, /* 35, _SC_AIO_MAX */ {nsup, {c:0}}, /* 36, _SC_AIO_PRIO_DELTA_MAX */ {nsup, {c:0}}, /* 37, _SC_DELAYTIMER_MAX */ {cons, {c:PTHREAD_KEYS_MAX}}, /* 38, _SC_THREAD_KEYS_MAX */ {cons, {c:PTHREAD_STACK_MIN}}, /* 39, _SC_THREAD_STACK_MIN */ {cons, {c:-1L}}, /* 40, _SC_THREAD_THREADS_MAX */ {cons, {c:TTY_NAME_MAX}}, /* 41, _SC_TTY_NAME_MAX */ {cons, {c:_POSIX_THREADS}}, /* 42, _SC_THREADS */ {cons, {c:-1L}}, /* 43, _SC_THREAD_ATTR_STACKADDR */ {cons, {c:_POSIX_THREAD_ATTR_STACKSIZE}}, /* 44, _SC_THREAD_ATTR_STACKSIZE */ {cons, {c:_POSIX_THREAD_PRIORITY_SCHEDULING}}, /* 45, _SC_THREAD_PRIORITY_SCHEDULING */ {cons, {c:-1L}}, /* 46, _SC_THREAD_PRIO_INHERIT */ {cons, {c:-1L}}, /* 47, _SC_THREAD_PRIO_PROTECT */ {cons, {c:_POSIX_THREAD_PROCESS_SHARED}}, /* 48, _SC_THREAD_PROCESS_SHARED */ {cons, {c:_POSIX_THREAD_SAFE_FUNCTIONS}}, /* 49, _SC_THREAD_SAFE_FUNCTIONS */ {cons, {c:16384L}}, /* 50, _SC_GETGR_R_SIZE_MAX */ {cons, {c:16384L}}, /* 51, _SC_GETPW_R_SIZE_MAX */ {cons, {c:LOGIN_NAME_MAX}}, /* 52, _SC_LOGIN_NAME_MAX */ {cons, {c:PTHREAD_DESTRUCTOR_ITERATIONS}}, /* 53, _SC_THREAD_DESTRUCTOR_ITERATIONS */ {cons, {c:_POSIX_ADVISORY_INFO}}, /* 54, _SC_ADVISORY_INFO */ {cons, {c:ATEXIT_MAX}}, /* 55, _SC_ATEXIT_MAX */ {cons, {c:-1L}}, /* 56, _SC_BARRIERS */ {cons, {c:BC_BASE_MAX}}, /* 57, _SC_BC_BASE_MAX */ {cons, {c:BC_DIM_MAX}}, /* 58, _SC_BC_DIM_MAX */ {cons, {c:BC_SCALE_MAX}}, /* 59, _SC_BC_SCALE_MAX */ {cons, {c:BC_STRING_MAX}}, /* 60, _SC_BC_STRING_MAX */ {cons, {c:-1L}}, /* 61, _SC_CLOCK_SELECTION */ {nsup, {c:0}}, /* 62, _SC_COLL_WEIGHTS_MAX */ {cons, {c:-1L}}, /* 63, _SC_CPUTIME */ {cons, {c:EXPR_NEST_MAX}}, /* 64, _SC_EXPR_NEST_MAX */ {cons, {c:HOST_NAME_MAX}}, /* 65, _SC_HOST_NAME_MAX */ {cons, {c:IOV_MAX}}, /* 66, _SC_IOV_MAX */ {cons, {c:_POSIX_IPV6}}, /* 67, _SC_IPV6 */ {cons, {c:LINE_MAX}}, /* 68, _SC_LINE_MAX */ {cons, {c:-1L}}, /* 69, _SC_MONOTONIC_CLOCK */ {cons, {c:_POSIX_RAW_SOCKETS}}, /* 70, _SC_RAW_SOCKETS */ {cons, {c:_POSIX_READER_WRITER_LOCKS}}, /* 71, _SC_READER_WRITER_LOCKS */ {cons, {c:_POSIX_REGEXP}}, /* 72, _SC_REGEXP */ {cons, {c:RE_DUP_MAX}}, /* 73, _SC_RE_DUP_MAX */ {cons, {c:_POSIX_SHELL}}, /* 74, _SC_SHELL */ {cons, {c:-1L}}, /* 75, _SC_SPAWN */ {cons, {c:-1L}}, /* 76, _SC_SPIN_LOCKS */ {cons, {c:-1L}}, /* 77, _SC_SPORADIC_SERVER */ {nsup, {c:0}}, /* 78, _SC_SS_REPL_MAX */ {cons, {c:SYMLOOP_MAX}}, /* 79, _SC_SYMLOOP_MAX */ {cons, {c:-1L}}, /* 80, _SC_THREAD_CPUTIME */ {cons, {c:-1L}}, /* 81, _SC_THREAD_SPORADIC_SERVER */ {cons, {c:-1L}}, /* 82, _SC_TIMEOUTS */ {cons, {c:-1L}}, /* 83, _SC_TRACE */ {cons, {c:-1L}}, /* 84, _SC_TRACE_EVENT_FILTER */ {nsup, {c:0}}, /* 85, _SC_TRACE_EVENT_NAME_MAX */ {cons, {c:-1L}}, /* 86, _SC_TRACE_INHERIT */ {cons, {c:-1L}}, /* 87, _SC_TRACE_LOG */ {nsup, {c:0}}, /* 88, _SC_TRACE_NAME_MAX */ {nsup, {c:0}}, /* 89, _SC_TRACE_SYS_MAX */ {nsup, {c:0}}, /* 90, _SC_TRACE_USER_EVENT_MAX */ {cons, {c:-1L}}, /* 91, _SC_TYPED_MEMORY_OBJECTS */ {cons, {c:-1L}}, /* 92, _SC_V6_ILP32_OFF32 */ {cons, {c:_POSIX_V6_ILP32_OFFBIG}}, /* 93, _SC_V6_ILP32_OFFBIG */ {cons, {c:-1L}}, /* 94, _SC_V6_LP64_OFF64 */ {cons, {c:-1L}}, /* 95, _SC_V6_LPBIG_OFFBIG */ {cons, {c:_XOPEN_CRYPT}}, /* 96, _SC_XOPEN_CRYPT */ {cons, {c:_XOPEN_ENH_I18N}}, /* 97, _SC_XOPEN_ENH_I18N */ {cons, {c:-1L}}, /* 98, _SC_XOPEN_LEGACY */ {cons, {c:-1L}}, /* 99, _SC_XOPEN_REALTIME */ {cons, {c:STREAM_MAX}}, /* 100, _SC_STREAM_MAX */ {cons, {c:_POSIX_PRIORITY_SCHEDULING}}, /* 101, _SC_PRIORITY_SCHEDULING */ {cons, {c:-1L}}, /* 102, _SC_XOPEN_REALTIME_THREADS */ {cons, {c:_XOPEN_SHM}}, /* 103, _SC_XOPEN_SHM */ {cons, {c:-1L}}, /* 104, _SC_XOPEN_STREAMS */ {cons, {c:-1L}}, /* 105, _SC_XOPEN_UNIX */ {cons, {c:_XOPEN_VERSION}}, /* 106, _SC_XOPEN_VERSION */ {cons, {c:_POSIX2_CHAR_TERM}}, /* 107, _SC_2_CHAR_TERM */ {cons, {c:_POSIX2_C_BIND}}, /* 108, _SC_2_C_BIND */ {cons, {c:_POSIX2_C_BIND}}, /* 109, _SC_2_C_DEV */ {cons, {c:-1L}}, /* 110, _SC_2_FORT_DEV */ {cons, {c:-1L}}, /* 111, _SC_2_FORT_RUN */ {cons, {c:-1L}}, /* 112, _SC_2_LOCALEDEF */ {cons, {c:-1L}}, /* 113, _SC_2_PBS */ {cons, {c:-1L}}, /* 114, _SC_2_PBS_ACCOUNTING */ {cons, {c:-1L}}, /* 115, _SC_2_PBS_CHECKPOINT */ {cons, {c:-1L}}, /* 116, _SC_2_PBS_LOCATE */ {cons, {c:-1L}}, /* 117, _SC_2_PBS_MESSAGE */ {cons, {c:-1L}}, /* 118, _SC_2_PBS_TRACK */ {cons, {c:_POSIX2_SW_DEV}}, /* 119, _SC_2_SW_DEV */ {cons, {c:_POSIX2_UPE}}, /* 120, _SC_2_UPE */ {cons, {c:_POSIX2_VERSION}}, /* 121, _SC_2_VERSION */ }; #define SC_MIN _SC_ARG_MAX #define SC_MAX _SC_2_VERSION /* sysconf: POSIX 4.8.1.1 */ /* Allows a portable app to determine quantities of resources or presence of an option at execution time. */ long int sysconf (int in) { if (in >= SC_MIN && in <= SC_MAX) { switch (sca[in].type) { case nsup: break; case cons: return sca[in].c; case func: return sca[in].f (in); } } /* Unimplemented sysconf name or invalid option value. */ set_errno (EINVAL); return -1L; }