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libc/winsup/cygwin/sysconf.cc

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/* sysconf.cc
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
2006, 2007, 2009, 2010, 2011, 2012 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 <sys/param.h>
#include <sys/sysinfo.h>
#include "cygerrno.h"
#include "security.h"
#include "path.h"
#include "fhandler.h"
#include "dtable.h"
#include "pinfo.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 wincap.allocation_granularity ();
}
static long
get_nproc_values (int in)
{
NTSTATUS status;
SYSTEM_BASIC_INFORMATION sbi;
status = NtQuerySystemInformation (SystemBasicInformation, (PVOID) &sbi,
sizeof sbi, NULL);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
debug_printf ("NtQuerySystemInformation: status %p, %E", status);
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
/ (wincap.allocation_granularity () / wincap.page_size ());
}
return -1;
}
static long
get_avphys (int in)
{
NTSTATUS status;
SYSTEM_PERFORMANCE_INFORMATION spi;
status = NtQuerySystemInformation (SystemPerformanceInformation,
(PVOID) &spi, sizeof spi, NULL);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
debug_printf ("NtQuerySystemInformation: status %d, %E", status);
return -1;
}
return spi.AvailablePages
/ (wincap.allocation_granularity () / wincap.page_size ());
}
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:_POSIX_THREAD_ATTR_STACKADDR}},/* 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:_POSIX_CLOCK_SELECTION}}, /* 61, _SC_CLOCK_SELECTION */
{nsup, {c:0}}, /* 62, _SC_COLL_WEIGHTS_MAX */
{cons, {c:_POSIX_CPUTIME}}, /* 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:_POSIX_MONOTONIC_CLOCK}}, /* 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:_POSIX_SPIN_LOCKS}}, /* 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:_POSIX_THREAD_CPUTIME}}, /* 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 */
{cons, {c:-1L}}, /* 122, _SC_THREAD_ROBUST_PRIO_INHERIT */
{cons, {c:-1L}}, /* 123, _SC_THREAD_ROBUST_PRIO_PROTECT */
{cons, {c:-1L}}, /* 124, _SC_XOPEN_UUCP */
};
#define SC_MIN _SC_ARG_MAX
#define SC_MAX _SC_XOPEN_UUCP
/* 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_XBS5_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 */
{ls ("")}, /* _CS_POSIX_V7_THREADS_CFLAGS */
{ls ("")}, /* _CS_POSIX_V7_THREADS_LDFLAGS */
{ls ("POSIXLY_CORRECT=1")}, /* _CS_V7_ENV */
};
#define CS_MIN _CS_PATH
#define CS_MAX _CS_V7_ENV
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;
}
extern "C" int
get_nprocs_conf (void)
{
return get_nproc_values (_SC_NPROCESSORS_CONF);
}
extern "C" int
get_nprocs (void)
{
return get_nproc_values (_SC_NPROCESSORS_ONLN);
}
extern "C" long
get_phys_pages (void)
{
return get_nproc_values (_SC_PHYS_PAGES);
}
extern "C" long
get_avphys_pages (void)
{
return get_avphys (_SC_AVPHYS_PAGES);
}
extern "C" int
sysinfo (struct sysinfo *info)
{
unsigned long long uptime = 0ULL, totalram = 0ULL, freeram = 0ULL,
totalswap = 0ULL, freeswap = 0ULL;
MEMORYSTATUSEX memory_status;
PSYSTEM_PAGEFILE_INFORMATION spi = NULL;
ULONG sizeof_spi = 512;
PSYSTEM_TIME_OF_DAY_INFORMATION stodi = NULL;
const ULONG sizeof_stodi = sizeof (SYSTEM_TIME_OF_DAY_INFORMATION);
NTSTATUS status = STATUS_SUCCESS;
winpids pids ((DWORD) 0);
if (!info)
{
set_errno (EFAULT);
return -1;
}
stodi = (PSYSTEM_TIME_OF_DAY_INFORMATION) malloc (sizeof_stodi);
status = NtQuerySystemInformation (SystemTimeOfDayInformation, (PVOID) stodi,
sizeof_stodi, NULL);
if (NT_SUCCESS (status))
uptime = (stodi->CurrentTime.QuadPart - stodi->BootTime.QuadPart)
/ 10000000ULL;
else
debug_printf ("NtQuerySystemInformation(SystemTimeOfDayInformation), "
"status %p", status);
if (stodi)
free (stodi);
memory_status.dwLength = sizeof (MEMORYSTATUSEX);
GlobalMemoryStatusEx (&memory_status);
totalram = memory_status.ullTotalPhys / wincap.page_size ();
freeram = memory_status.ullAvailPhys / wincap.page_size ();
spi = (PSYSTEM_PAGEFILE_INFORMATION) malloc (sizeof_spi);
if (spi)
{
status = NtQuerySystemInformation (SystemPagefileInformation, (PVOID) spi,
sizeof_spi, &sizeof_spi);
if (status == STATUS_INFO_LENGTH_MISMATCH)
{
free (spi);
spi = (PSYSTEM_PAGEFILE_INFORMATION) malloc (sizeof_spi);
if (spi)
status = NtQuerySystemInformation (SystemPagefileInformation,
(PVOID) spi, sizeof_spi,
&sizeof_spi);
}
}
if (!spi || !NT_SUCCESS (status))
{
debug_printf ("NtQuerySystemInformation(SystemPagefileInformation), "
"status %p", status);
totalswap = (memory_status.ullTotalPageFile - memory_status.ullTotalPhys)
/ wincap.page_size ();
freeswap = (memory_status.ullAvailPageFile - memory_status.ullTotalPhys)
/ wincap.page_size ();
}
else
{
PSYSTEM_PAGEFILE_INFORMATION spp = spi;
do
{
totalswap += spp->CurrentSize;
freeswap += spp->CurrentSize - spp->TotalUsed;
}
while (spp->NextEntryOffset
&& (spp = (PSYSTEM_PAGEFILE_INFORMATION)
((char *) spp + spp->NextEntryOffset)));
}
if (spi)
free (spi);
info->uptime = (long) uptime;
info->totalram = (unsigned long) totalram;
info->freeram = (unsigned long) freeram;
info->totalswap = (unsigned long) totalswap;
info->freeswap = (unsigned long) freeswap;
info->procs = (unsigned short) pids.npids;
info->mem_unit = (unsigned int) wincap.page_size ();
/* FIXME: unsupported */
info->loads[0] = 0UL;
info->loads[1] = 0UL;
info->loads[2] = 0UL;
info->sharedram = 0UL;
info->bufferram = 0UL;
info->totalhigh = 0UL;
info->freehigh = 0UL;
return 0;
}
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