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-rw-r--r--libc-top-half/musl/src/conf/sysconf.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/conf/sysconf.c b/libc-top-half/musl/src/conf/sysconf.c
new file mode 100644
index 0000000..c72174f
--- /dev/null
+++ b/libc-top-half/musl/src/conf/sysconf.c
@@ -0,0 +1,282 @@
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#ifdef __wasilibc_unmodified_upstream // WASI has no process-level accounting
+#include <sys/resource.h>
+#endif
+#ifdef __wasilibc_unmodified_upstream // WASI has no realtime signals
+#include <signal.h>
+#endif
+#include <sys/sysinfo.h>
+#ifdef __wasilibc_unmodified_upstream
+#include "syscall.h"
+#endif
+#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: ;
+#ifdef __wasilibc_unmodified_upstream
+ 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
+ // WASI has no way to query the processor count
+ 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];
+}