[wasi-libc.git] / libc-top-half / musl / src / conf / sysconf.c

#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <sys/resource.h>
#include <signal.h>
#include <sys/sysinfo.h>
#include "syscall.h"
#include "libc.h"

#define JT(x) (-256|(x))
#define VER JT(1)
#define JT_ARG_MAX JT(2)
#ifdef __wasilibc_unmodified_upstream // WASI has no mq
#define JT_MQ_PRIO_MAX JT(3)
#endif
#define JT_PAGE_SIZE JT(4)
#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores
#define JT_SEM_VALUE_MAX JT(5)
#endif
#define JT_NPROCESSORS_CONF JT(6)
#define JT_NPROCESSORS_ONLN JT(7)
#define JT_PHYS_PAGES JT(8)
#define JT_AVPHYS_PAGES JT(9)
#define JT_ZERO JT(10)
#define JT_DELAYTIMER_MAX JT(11)

#define RLIM(x) (-32768|(RLIMIT_ ## x))

long sysconf(int name)
{
	static const short values[] = {
		[_SC_ARG_MAX] = JT_ARG_MAX,
#ifdef __wasilibc_unmodified_upstream // WASI has no processes
		[_SC_CHILD_MAX] = RLIM(NPROC),
#else
		// Not supported on wasi.
		[_SC_CHILD_MAX] = -1,
#endif
		[_SC_CLK_TCK] = 100,
		[_SC_NGROUPS_MAX] = 32,
#ifdef __wasilibc_unmodified_upstream // WASI has no rlimit
		[_SC_OPEN_MAX] = RLIM(NOFILE),
#else
		// Rlimit is not supported on wasi.
		[_SC_OPEN_MAX] = -1,
#endif

		[_SC_STREAM_MAX] = -1,
		[_SC_TZNAME_MAX] = TZNAME_MAX,
		[_SC_JOB_CONTROL] = 1,
		[_SC_SAVED_IDS] = 1,
		[_SC_REALTIME_SIGNALS] = VER,
		[_SC_PRIORITY_SCHEDULING] = -1,
		[_SC_TIMERS] = VER,
		[_SC_ASYNCHRONOUS_IO] = VER,
		[_SC_PRIORITIZED_IO] = -1,
		[_SC_SYNCHRONIZED_IO] = -1,
		[_SC_FSYNC] = VER,
		[_SC_MAPPED_FILES] = VER,
		[_SC_MEMLOCK] = VER,
		[_SC_MEMLOCK_RANGE] = VER,
		[_SC_MEMORY_PROTECTION] = VER,
		[_SC_MESSAGE_PASSING] = VER,
		[_SC_SEMAPHORES] = VER,
		[_SC_SHARED_MEMORY_OBJECTS] = VER,
		[_SC_AIO_LISTIO_MAX] = -1,
		[_SC_AIO_MAX] = -1,
		[_SC_AIO_PRIO_DELTA_MAX] = JT_ZERO, /* ?? */
		[_SC_DELAYTIMER_MAX] = JT_DELAYTIMER_MAX,
#ifdef __wasilibc_unmodified_upstream // WASI has no mq
		[_SC_MQ_OPEN_MAX] = -1,
		[_SC_MQ_PRIO_MAX] = JT_MQ_PRIO_MAX,
#endif
		[_SC_VERSION] = VER,
		[_SC_PAGE_SIZE] = JT_PAGE_SIZE,
#ifdef __wasilibc_unmodified_upstream // WASI has no realtime signals
		[_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3,
#else
		// Not supported on wasi.
		[_SC_RTSIG_MAX] = -1,
#endif
#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores
		[_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX,
		[_SC_SEM_VALUE_MAX] = JT_SEM_VALUE_MAX,
#else
		[_SC_SEM_NSEMS_MAX] = -1,
		[_SC_SEM_VALUE_MAX] = -1,
#endif
		[_SC_SIGQUEUE_MAX] = -1,
		[_SC_TIMER_MAX] = -1,
#ifdef __wasilibc_unmodified_upstream // WASI has no shell commands
		[_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX,
		[_SC_BC_DIM_MAX] = _POSIX2_BC_DIM_MAX,
		[_SC_BC_SCALE_MAX] = _POSIX2_BC_SCALE_MAX,
		[_SC_BC_STRING_MAX] = _POSIX2_BC_STRING_MAX,
#else
		[_SC_BC_BASE_MAX] = -1,
		[_SC_BC_DIM_MAX] = -1,
		[_SC_BC_SCALE_MAX] = -1,
		[_SC_BC_STRING_MAX] = -1,
#endif
		[_SC_COLL_WEIGHTS_MAX] = COLL_WEIGHTS_MAX,
		[_SC_EXPR_NEST_MAX] = -1,
		[_SC_LINE_MAX] = -1,
		[_SC_RE_DUP_MAX] = RE_DUP_MAX,
		[_SC_2_VERSION] = VER,
		[_SC_2_C_BIND] = VER,
		[_SC_2_C_DEV] = -1,
		[_SC_2_FORT_DEV] = -1,
		[_SC_2_FORT_RUN] = -1,
		[_SC_2_SW_DEV] = -1,
		[_SC_2_LOCALEDEF] = -1,
		[_SC_IOV_MAX] = IOV_MAX,
		[_SC_THREADS] = VER,
		[_SC_THREAD_SAFE_FUNCTIONS] = VER,
		[_SC_GETGR_R_SIZE_MAX] = -1,
		[_SC_GETPW_R_SIZE_MAX] = -1,
		[_SC_LOGIN_NAME_MAX] = 256,
		[_SC_TTY_NAME_MAX] = TTY_NAME_MAX,
#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
		[_SC_THREAD_DESTRUCTOR_ITERATIONS] = PTHREAD_DESTRUCTOR_ITERATIONS,
		[_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX,
		[_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN,
#else
		[_SC_THREAD_DESTRUCTOR_ITERATIONS] = -1,
		[_SC_THREAD_KEYS_MAX] = -1,
		[_SC_THREAD_STACK_MIN] = -1,
#endif
		[_SC_THREAD_THREADS_MAX] = -1,
		[_SC_THREAD_ATTR_STACKADDR] = VER,
		[_SC_THREAD_ATTR_STACKSIZE] = VER,
		[_SC_THREAD_PRIORITY_SCHEDULING] = VER,
		[_SC_THREAD_PRIO_INHERIT] = -1,
		[_SC_THREAD_PRIO_PROTECT] = -1,
		[_SC_THREAD_PROCESS_SHARED] = VER,
		[_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF,
		[_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN,
		[_SC_PHYS_PAGES] = JT_PHYS_PAGES,
		[_SC_AVPHYS_PAGES] = JT_AVPHYS_PAGES,
		[_SC_ATEXIT_MAX] = -1,
		[_SC_PASS_MAX] = -1,
		[_SC_XOPEN_VERSION] = _XOPEN_VERSION,
		[_SC_XOPEN_XCU_VERSION] = _XOPEN_VERSION,
		[_SC_XOPEN_UNIX] = 1,
		[_SC_XOPEN_CRYPT] = -1,
		[_SC_XOPEN_ENH_I18N] = 1,
		[_SC_XOPEN_SHM] = 1,
		[_SC_2_CHAR_TERM] = -1,
		[_SC_2_UPE] = -1,
		[_SC_XOPEN_XPG2] = -1,
		[_SC_XOPEN_XPG3] = -1,
		[_SC_XOPEN_XPG4] = -1,
		[_SC_NZERO] = NZERO,
		[_SC_XBS5_ILP32_OFF32] = -1,
		[_SC_XBS5_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1,
		[_SC_XBS5_LP64_OFF64] = sizeof(long)==8 ? 1 : -1,
		[_SC_XBS5_LPBIG_OFFBIG] = -1,
		[_SC_XOPEN_LEGACY] = -1,
		[_SC_XOPEN_REALTIME] = -1,
		[_SC_XOPEN_REALTIME_THREADS] = -1,
		[_SC_ADVISORY_INFO] = VER,
		[_SC_BARRIERS] = VER,
		[_SC_CLOCK_SELECTION] = VER,
		[_SC_CPUTIME] = VER,
		[_SC_THREAD_CPUTIME] = VER,
		[_SC_MONOTONIC_CLOCK] = VER,
		[_SC_READER_WRITER_LOCKS] = VER,
		[_SC_SPIN_LOCKS] = VER,
		[_SC_REGEXP] = 1,
		[_SC_SHELL] = 1,
		[_SC_SPAWN] = VER,
		[_SC_SPORADIC_SERVER] = -1,
		[_SC_THREAD_SPORADIC_SERVER] = -1,
		[_SC_TIMEOUTS] = VER,
		[_SC_TYPED_MEMORY_OBJECTS] = -1,
		[_SC_2_PBS] = -1,
		[_SC_2_PBS_ACCOUNTING] = -1,
		[_SC_2_PBS_LOCATE] = -1,
		[_SC_2_PBS_MESSAGE] = -1,
		[_SC_2_PBS_TRACK] = -1,
		[_SC_SYMLOOP_MAX] = SYMLOOP_MAX,
		[_SC_STREAMS] = JT_ZERO,
		[_SC_2_PBS_CHECKPOINT] = -1,
		[_SC_V6_ILP32_OFF32] = -1,
		[_SC_V6_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1,
		[_SC_V6_LP64_OFF64] = sizeof(long)==8 ? 1 : -1,
		[_SC_V6_LPBIG_OFFBIG] = -1,
		[_SC_HOST_NAME_MAX] = HOST_NAME_MAX,
		[_SC_TRACE] = -1,
		[_SC_TRACE_EVENT_FILTER] = -1,
		[_SC_TRACE_INHERIT] = -1,
		[_SC_TRACE_LOG] = -1,

		[_SC_IPV6] = VER,
		[_SC_RAW_SOCKETS] = VER,
		[_SC_V7_ILP32_OFF32] = -1,
		[_SC_V7_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1,
		[_SC_V7_LP64_OFF64] = sizeof(long)==8 ? 1 : -1,
		[_SC_V7_LPBIG_OFFBIG] = -1,
		[_SC_SS_REPL_MAX] = -1,
		[_SC_TRACE_EVENT_NAME_MAX] = -1,
		[_SC_TRACE_NAME_MAX] = -1,
		[_SC_TRACE_SYS_MAX] = -1,
		[_SC_TRACE_USER_EVENT_MAX] = -1,
		[_SC_XOPEN_STREAMS] = JT_ZERO,
		[_SC_THREAD_ROBUST_PRIO_INHERIT] = -1,
		[_SC_THREAD_ROBUST_PRIO_PROTECT] = -1,
	};

	if (name >= sizeof(values)/sizeof(values[0]) || !values[name]) {
		errno = EINVAL;
		return -1;
	} else if (values[name] >= -1) {
		return values[name];
	} else if (values[name] < -256) {
#ifdef __wasilibc_unmodified_upstream // WASI has no getrlimit
		struct rlimit lim;
		getrlimit(values[name]&16383, &lim);
		if (lim.rlim_cur == RLIM_INFINITY)
			return -1;
		return lim.rlim_cur > LONG_MAX ? LONG_MAX : lim.rlim_cur;
#else
		// Not supported on wasi.
		errno = EINVAL;
		return -1;
#endif
	}

	switch ((unsigned char)values[name]) {
	case VER & 255:
		return _POSIX_VERSION;
	case JT_ARG_MAX & 255:
		return ARG_MAX;
#ifdef __wasilibc_unmodified_upstream // WASI has no mq
	case JT_MQ_PRIO_MAX & 255:
		return MQ_PRIO_MAX;
#endif
	case JT_PAGE_SIZE & 255:
		return PAGE_SIZE;
#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores
	case JT_SEM_VALUE_MAX & 255:
		return SEM_VALUE_MAX;
#endif
	case JT_DELAYTIMER_MAX & 255:
		return DELAYTIMER_MAX;
	case JT_NPROCESSORS_CONF & 255:
	case JT_NPROCESSORS_ONLN & 255: ;
#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
		unsigned char set[128] = {1};
		int i, cnt;
		__syscall(SYS_sched_getaffinity, 0, sizeof set, set);
		for (i=cnt=0; i<sizeof set; i++)
			for (; set[i]; set[i]&=set[i]-1, cnt++);
		return cnt;
#else
		// With no thread support, just say there's 1 processor.
		return 1;
#endif
#ifdef __wasilibc_unmodified_upstream // WASI has no sysinfo
	case JT_PHYS_PAGES & 255:
	case JT_AVPHYS_PAGES & 255: ;
		unsigned long long mem;
		struct sysinfo si;
		__lsysinfo(&si);
		if (!si.mem_unit) si.mem_unit = 1;
		if (name==_SC_PHYS_PAGES) mem = si.totalram;
		else mem = si.freeram + si.bufferram;
		mem *= si.mem_unit;
		mem /= PAGE_SIZE;
		return (mem > LONG_MAX) ? LONG_MAX : mem;
#endif
	case JT_ZERO & 255:
		return 0;
	}
	return values[name];
}
Commit	Line	Data
320054e8 DG	1	#include <unistd.h>
	2	#include <limits.h>
	3	#include <errno.h>
	4	#include <sys/resource.h>
	5	#include <signal.h>
	6	#include <sys/sysinfo.h>
	7	#include "syscall.h"
	8	#include "libc.h"
	9
	10	#define JT(x) (-256\|(x))
	11	#define VER JT(1)
	12	#define JT_ARG_MAX JT(2)
e5f14be3	13	#ifdef __wasilibc_unmodified_upstream // WASI has no mq
320054e8 DG	14	#define JT_MQ_PRIO_MAX JT(3)
	15	#endif
	16	#define JT_PAGE_SIZE JT(4)
9f0d8e85	17	#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores
320054e8	18	#define JT_SEM_VALUE_MAX JT(5)
9f0d8e85	19	#endif
320054e8 DG	20	#define JT_NPROCESSORS_CONF JT(6)
	21	#define JT_NPROCESSORS_ONLN JT(7)
	22	#define JT_PHYS_PAGES JT(8)
	23	#define JT_AVPHYS_PAGES JT(9)
	24	#define JT_ZERO JT(10)
	25	#define JT_DELAYTIMER_MAX JT(11)
	26
	27	#define RLIM(x) (-32768\|(RLIMIT_ ## x))
	28
	29	long sysconf(int name)
	30	{
	31	static const short values[] = {
	32	[_SC_ARG_MAX] = JT_ARG_MAX,
e5f14be3	33	#ifdef __wasilibc_unmodified_upstream // WASI has no processes
320054e8 DG	34	[_SC_CHILD_MAX] = RLIM(NPROC),
320054e8 DG	35	#else
ec9f1c39	36	// Not supported on wasi.
320054e8 DG	37	[_SC_CHILD_MAX] = -1,
	38	#endif
	39	[_SC_CLK_TCK] = 100,
	40	[_SC_NGROUPS_MAX] = 32,
e5f14be3	41	#ifdef __wasilibc_unmodified_upstream // WASI has no rlimit
320054e8 DG	42	[_SC_OPEN_MAX] = RLIM(NOFILE),
320054e8 DG	43	#else
e5f14be3	44	// Rlimit is not supported on wasi.
320054e8 DG	45	[_SC_OPEN_MAX] = -1,
320054e8 DG	46	#endif
e5f14be3	47
320054e8 DG	48	[_SC_STREAM_MAX] = -1,
	49	[_SC_TZNAME_MAX] = TZNAME_MAX,
	50	[_SC_JOB_CONTROL] = 1,
	51	[_SC_SAVED_IDS] = 1,
	52	[_SC_REALTIME_SIGNALS] = VER,
	53	[_SC_PRIORITY_SCHEDULING] = -1,
	54	[_SC_TIMERS] = VER,
	55	[_SC_ASYNCHRONOUS_IO] = VER,
	56	[_SC_PRIORITIZED_IO] = -1,
	57	[_SC_SYNCHRONIZED_IO] = -1,
	58	[_SC_FSYNC] = VER,
	59	[_SC_MAPPED_FILES] = VER,
	60	[_SC_MEMLOCK] = VER,
	61	[_SC_MEMLOCK_RANGE] = VER,
	62	[_SC_MEMORY_PROTECTION] = VER,
	63	[_SC_MESSAGE_PASSING] = VER,
	64	[_SC_SEMAPHORES] = VER,
	65	[_SC_SHARED_MEMORY_OBJECTS] = VER,
	66	[_SC_AIO_LISTIO_MAX] = -1,
	67	[_SC_AIO_MAX] = -1,
	68	[_SC_AIO_PRIO_DELTA_MAX] = JT_ZERO, /* ?? */
	69	[_SC_DELAYTIMER_MAX] = JT_DELAYTIMER_MAX,
e5f14be3	70	#ifdef __wasilibc_unmodified_upstream // WASI has no mq
320054e8 DG	71	[_SC_MQ_OPEN_MAX] = -1,
	72	[_SC_MQ_PRIO_MAX] = JT_MQ_PRIO_MAX,
	73	#endif
	74	[_SC_VERSION] = VER,
	75	[_SC_PAGE_SIZE] = JT_PAGE_SIZE,
e5f14be3	76	#ifdef __wasilibc_unmodified_upstream // WASI has no realtime signals
320054e8 DG	77	[_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3,
320054e8 DG	78	#else
ec9f1c39	79	// Not supported on wasi.
320054e8 DG	80	[_SC_RTSIG_MAX] = -1,
320054e8 DG	81	#endif
9f0d8e85	82	#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores
320054e8 DG	83	[_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX,
320054e8 DG	84	[_SC_SEM_VALUE_MAX] = JT_SEM_VALUE_MAX,
9f0d8e85 DG	85	#else
	86	[_SC_SEM_NSEMS_MAX] = -1,
	87	[_SC_SEM_VALUE_MAX] = -1,
	88	#endif
320054e8 DG	89	[_SC_SIGQUEUE_MAX] = -1,
320054e8 DG	90	[_SC_TIMER_MAX] = -1,
9f0d8e85	91	#ifdef __wasilibc_unmodified_upstream // WASI has no shell commands
320054e8 DG	92	[_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX,
	93	[_SC_BC_DIM_MAX] = _POSIX2_BC_DIM_MAX,
	94	[_SC_BC_SCALE_MAX] = _POSIX2_BC_SCALE_MAX,
	95	[_SC_BC_STRING_MAX] = _POSIX2_BC_STRING_MAX,
9f0d8e85 DG	96	#else
	97	[_SC_BC_BASE_MAX] = -1,
	98	[_SC_BC_DIM_MAX] = -1,
	99	[_SC_BC_SCALE_MAX] = -1,
	100	[_SC_BC_STRING_MAX] = -1,
	101	#endif
320054e8 DG	102	[_SC_COLL_WEIGHTS_MAX] = COLL_WEIGHTS_MAX,
	103	[_SC_EXPR_NEST_MAX] = -1,
	104	[_SC_LINE_MAX] = -1,
	105	[_SC_RE_DUP_MAX] = RE_DUP_MAX,
	106	[_SC_2_VERSION] = VER,
	107	[_SC_2_C_BIND] = VER,
	108	[_SC_2_C_DEV] = -1,
	109	[_SC_2_FORT_DEV] = -1,
	110	[_SC_2_FORT_RUN] = -1,
	111	[_SC_2_SW_DEV] = -1,
	112	[_SC_2_LOCALEDEF] = -1,
	113	[_SC_IOV_MAX] = IOV_MAX,
	114	[_SC_THREADS] = VER,
	115	[_SC_THREAD_SAFE_FUNCTIONS] = VER,
	116	[_SC_GETGR_R_SIZE_MAX] = -1,
	117	[_SC_GETPW_R_SIZE_MAX] = -1,
	118	[_SC_LOGIN_NAME_MAX] = 256,
	119	[_SC_TTY_NAME_MAX] = TTY_NAME_MAX,
9f0d8e85	120	#if defined(__wasilibc_unmodified_upstream) \|\| defined(_REENTRANT)
320054e8 DG	121	[_SC_THREAD_DESTRUCTOR_ITERATIONS] = PTHREAD_DESTRUCTOR_ITERATIONS,
	122	[_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX,
	123	[_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN,
9f0d8e85 DG	124	#else
	125	[_SC_THREAD_DESTRUCTOR_ITERATIONS] = -1,
	126	[_SC_THREAD_KEYS_MAX] = -1,
	127	[_SC_THREAD_STACK_MIN] = -1,
	128	#endif
320054e8 DG	129	[_SC_THREAD_THREADS_MAX] = -1,
	130	[_SC_THREAD_ATTR_STACKADDR] = VER,
	131	[_SC_THREAD_ATTR_STACKSIZE] = VER,
	132	[_SC_THREAD_PRIORITY_SCHEDULING] = VER,
	133	[_SC_THREAD_PRIO_INHERIT] = -1,
	134	[_SC_THREAD_PRIO_PROTECT] = -1,
	135	[_SC_THREAD_PROCESS_SHARED] = VER,
	136	[_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF,
	137	[_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN,
	138	[_SC_PHYS_PAGES] = JT_PHYS_PAGES,
	139	[_SC_AVPHYS_PAGES] = JT_AVPHYS_PAGES,
	140	[_SC_ATEXIT_MAX] = -1,
	141	[_SC_PASS_MAX] = -1,
	142	[_SC_XOPEN_VERSION] = _XOPEN_VERSION,
	143	[_SC_XOPEN_XCU_VERSION] = _XOPEN_VERSION,
	144	[_SC_XOPEN_UNIX] = 1,
	145	[_SC_XOPEN_CRYPT] = -1,
	146	[_SC_XOPEN_ENH_I18N] = 1,
	147	[_SC_XOPEN_SHM] = 1,
	148	[_SC_2_CHAR_TERM] = -1,
	149	[_SC_2_UPE] = -1,
	150	[_SC_XOPEN_XPG2] = -1,
	151	[_SC_XOPEN_XPG3] = -1,
	152	[_SC_XOPEN_XPG4] = -1,
	153	[_SC_NZERO] = NZERO,
	154	[_SC_XBS5_ILP32_OFF32] = -1,
	155	[_SC_XBS5_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1,
	156	[_SC_XBS5_LP64_OFF64] = sizeof(long)==8 ? 1 : -1,
	157	[_SC_XBS5_LPBIG_OFFBIG] = -1,
	158	[_SC_XOPEN_LEGACY] = -1,
	159	[_SC_XOPEN_REALTIME] = -1,
	160	[_SC_XOPEN_REALTIME_THREADS] = -1,
	161	[_SC_ADVISORY_INFO] = VER,
	162	[_SC_BARRIERS] = VER,
	163	[_SC_CLOCK_SELECTION] = VER,
	164	[_SC_CPUTIME] = VER,
	165	[_SC_THREAD_CPUTIME] = VER,
	166	[_SC_MONOTONIC_CLOCK] = VER,
	167	[_SC_READER_WRITER_LOCKS] = VER,
	168	[_SC_SPIN_LOCKS] = VER,
	169	[_SC_REGEXP] = 1,
	170	[_SC_SHELL] = 1,
	171	[_SC_SPAWN] = VER,
	172	[_SC_SPORADIC_SERVER] = -1,
	173	[_SC_THREAD_SPORADIC_SERVER] = -1,
	174	[_SC_TIMEOUTS] = VER,
	175	[_SC_TYPED_MEMORY_OBJECTS] = -1,
	176	[_SC_2_PBS] = -1,
	177	[_SC_2_PBS_ACCOUNTING] = -1,
	178	[_SC_2_PBS_LOCATE] = -1,
	179	[_SC_2_PBS_MESSAGE] = -1,
	180	[_SC_2_PBS_TRACK] = -1,
	181	[_SC_SYMLOOP_MAX] = SYMLOOP_MAX,
	182	[_SC_STREAMS] = JT_ZERO,
	183	[_SC_2_PBS_CHECKPOINT] = -1,
	184	[_SC_V6_ILP32_OFF32] = -1,
	185	[_SC_V6_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1,
	186	[_SC_V6_LP64_OFF64] = sizeof(long)==8 ? 1 : -1,
	187	[_SC_V6_LPBIG_OFFBIG] = -1,
	188	[_SC_HOST_NAME_MAX] = HOST_NAME_MAX,
	189	[_SC_TRACE] = -1,
	190	[_SC_TRACE_EVENT_FILTER] = -1,
	191	[_SC_TRACE_INHERIT] = -1,
	192	[_SC_TRACE_LOG] = -1,
193
194	[_SC_IPV6] = VER,
195	[_SC_RAW_SOCKETS] = VER,
196	[_SC_V7_ILP32_OFF32] = -1,
197	[_SC_V7_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : -1,
198	[_SC_V7_LP64_OFF64] = sizeof(long)==8 ? 1 : -1,
199	[_SC_V7_LPBIG_OFFBIG] = -1,
200	[_SC_SS_REPL_MAX] = -1,
201	[_SC_TRACE_EVENT_NAME_MAX] = -1,
202	[_SC_TRACE_NAME_MAX] = -1,
203	[_SC_TRACE_SYS_MAX] = -1,
204	[_SC_TRACE_USER_EVENT_MAX] = -1,
205	[_SC_XOPEN_STREAMS] = JT_ZERO,
206	[_SC_THREAD_ROBUST_PRIO_INHERIT] = -1,
207	[_SC_THREAD_ROBUST_PRIO_PROTECT] = -1,
208	};
209
210	if (name >= sizeof(values)/sizeof(values[0]) \|\| !values[name]) {
211	errno = EINVAL;
212	return -1;
213	} else if (values[name] >= -1) {
214	return values[name];
215	} else if (values[name] < -256) {
e5f14be3	216	#ifdef __wasilibc_unmodified_upstream // WASI has no getrlimit
320054e8 DG	217	struct rlimit lim;
	218	getrlimit(values[name]&16383, &lim);
	219	if (lim.rlim_cur == RLIM_INFINITY)
	220	return -1;
	221	return lim.rlim_cur > LONG_MAX ? LONG_MAX : lim.rlim_cur;
	222	#else
ec9f1c39	223	// Not supported on wasi.
320054e8 DG	224	errno = EINVAL;
	225	return -1;
	226	#endif
	227	}
	228
	229	switch ((unsigned char)values[name]) {
	230	case VER & 255:
	231	return _POSIX_VERSION;
	232	case JT_ARG_MAX & 255:
	233	return ARG_MAX;
e5f14be3	234	#ifdef __wasilibc_unmodified_upstream // WASI has no mq
320054e8 DG	235	case JT_MQ_PRIO_MAX & 255:
	236	return MQ_PRIO_MAX;
	237	#endif
	238	case JT_PAGE_SIZE & 255:
	239	return PAGE_SIZE;
9f0d8e85	240	#ifdef __wasilibc_unmodified_upstream // WASI has no semaphores
320054e8 DG	241	case JT_SEM_VALUE_MAX & 255:
320054e8 DG	242	return SEM_VALUE_MAX;
9f0d8e85	243	#endif
320054e8 DG	244	case JT_DELAYTIMER_MAX & 255:
	245	return DELAYTIMER_MAX;
	246	case JT_NPROCESSORS_CONF & 255:
	247	case JT_NPROCESSORS_ONLN & 255: ;
	248	#if defined(__wasilibc_unmodified_upstream) \|\| defined(_REENTRANT)
	249	unsigned char set[128] = {1};
	250	int i, cnt;
	251	__syscall(SYS_sched_getaffinity, 0, sizeof set, set);
	252	for (i=cnt=0; i<sizeof set; i++)
	253	for (; set[i]; set[i]&=set[i]-1, cnt++);
	254	return cnt;
	255	#else
ec9f1c39	256	// With no thread support, just say there's 1 processor.
320054e8 DG	257	return 1;
320054e8 DG	258	#endif
e5f14be3	259	#ifdef __wasilibc_unmodified_upstream // WASI has no sysinfo
320054e8 DG	260	case JT_PHYS_PAGES & 255:
	261	case JT_AVPHYS_PAGES & 255: ;
	262	unsigned long long mem;
	263	struct sysinfo si;
	264	__lsysinfo(&si);
	265	if (!si.mem_unit) si.mem_unit = 1;
	266	if (name==_SC_PHYS_PAGES) mem = si.totalram;
	267	else mem = si.freeram + si.bufferram;
	268	mem *= si.mem_unit;
	269	mem /= PAGE_SIZE;
	270	return (mem > LONG_MAX) ? LONG_MAX : mem;
	271	#endif
	272	case JT_ZERO & 255:
	273	return 0;
	274	}
	275	return values[name];
	276	}