295 lines
10 KiB
C++
295 lines
10 KiB
C++
/* 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 <unistd.h>
|
|
#include "cygerrno.h"
|
|
#include "security.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
#include "dtable.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;
|
|
}
|
|
|
|
#define ls(s) sizeof(s),s
|
|
|
|
static struct
|
|
{
|
|
size_t l;
|
|
const char *s;
|
|
} csa[] =
|
|
{
|
|
{ls ("/bin:/usr/bin")}, /* _CS_PATH */
|
|
{0, NULL}, /* _CS_POSIX_V6_ILP32_OFF32_CFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_ILP32_OFF32_LDFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_ILP32_OFF32_LIBS */
|
|
{0, NULL}, /* _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS */
|
|
{ls ("")}, /* _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS */
|
|
{ls ("")}, /* _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS */
|
|
{ls ("")}, /* _CS_POSIX_V6_ILP32_OFFBIG_LIBS */
|
|
{ls ("")}, /* _CS_XBS5_ILP32_OFFBIG_LINTFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_LP64_OFF64_CFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_LP64_OFF64_LDFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_LP64_OFF64_LIBS */
|
|
{0, NULL}, /* _CS_XBS5_LP64_OFF64_LINTFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS */
|
|
{0, NULL}, /* _CS_POSIX_V6_LPBIG_OFFBIG_LIBS */
|
|
{0, NULL}, /* _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS */
|
|
{ls ("POSIX_V6_ILP32_OFFBIG")}, /* _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS */
|
|
};
|
|
|
|
#define CS_MIN _CS_PATH
|
|
#define CS_MAX _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS
|
|
|
|
extern "C" size_t
|
|
confstr (int in, char *buf, size_t len)
|
|
{
|
|
if (in >= CS_MIN && in <= CS_MAX)
|
|
{
|
|
if (csa[in].l && len)
|
|
{
|
|
buf[0] = 0;
|
|
strncat (buf, csa[in].s, min (len, csa[in].l) - 1);
|
|
}
|
|
return csa[in].l;
|
|
}
|
|
/* Invalid option value. */
|
|
set_errno (EINVAL);
|
|
return 0;
|
|
}
|