#include <unistd.h>
#include <limits.h>
#include <errno.h>
+#include <sys/resource.h>
+#include "syscall.h"
#define VER (-2)
#define OFLOW (-3)
+#define CPUCNT (-4)
+#define RLIM(x) (-32768|(RLIMIT_ ## x))
long sysconf(int name)
{
static const short values[] = {
[_SC_ARG_MAX] = OFLOW,
- [_SC_CHILD_MAX] = -1,
+ [_SC_CHILD_MAX] = RLIM(NPROC),
[_SC_CLK_TCK] = 100,
[_SC_NGROUPS_MAX] = 32,
- [_SC_OPEN_MAX] = 1024,
+ [_SC_OPEN_MAX] = RLIM(NOFILE),
[_SC_STREAM_MAX] = -1,
[_SC_TZNAME_MAX] = TZNAME_MAX,
[_SC_JOB_CONTROL] = 1,
[_SC_AIO_PRIO_DELTA_MAX] = 0, /* ?? */
[_SC_DELAYTIMER_MAX] = _POSIX_DELAYTIMER_MAX,
[_SC_MQ_OPEN_MAX] = -1,
- [_SC_MQ_PRIO_MAX] = _POSIX_MQ_PRIO_MAX,
+ [_SC_MQ_PRIO_MAX] = MQ_PRIO_MAX,
[_SC_VERSION] = VER,
[_SC_PAGE_SIZE] = PAGE_SIZE,
[_SC_RTSIG_MAX] = 63, /* ?? */
- [_SC_SEM_NSEMS_MAX] = _POSIX_SEM_NSEMS_MAX,
- [_SC_SEM_VALUE_MAX] = _POSIX_SEM_VALUE_MAX,
+ [_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX,
+ [_SC_SEM_VALUE_MAX] = OFLOW,
[_SC_SIGQUEUE_MAX] = -1,
[_SC_TIMER_MAX] = -1,
[_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX,
[_SC_LOGIN_NAME_MAX] = 256,
[_SC_TTY_NAME_MAX] = TTY_NAME_MAX,
[_SC_THREAD_DESTRUCTOR_ITERATIONS] = _POSIX_THREAD_DESTRUCTOR_ITERATIONS,
- [_SC_THREAD_KEYS_MAX] = -1,
- [_SC_THREAD_STACK_MIN] = 2*PAGE_SIZE,
+ [_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX,
+ [_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN,
[_SC_THREAD_THREADS_MAX] = -1,
- [_SC_THREAD_ATTR_STACKADDR] = -1,
+ [_SC_THREAD_ATTR_STACKADDR] = VER,
[_SC_THREAD_ATTR_STACKSIZE] = VER,
- [_SC_THREAD_PRIORITY_SCHEDULING] = -1,
+ [_SC_THREAD_PRIORITY_SCHEDULING] = VER,
[_SC_THREAD_PRIO_INHERIT] = -1,
[_SC_THREAD_PRIO_PROTECT] = -1,
[_SC_THREAD_PROCESS_SHARED] = VER,
- [_SC_NPROCESSORS_CONF] = -1,
- [_SC_NPROCESSORS_ONLN] = -1,
+ [_SC_NPROCESSORS_CONF] = CPUCNT,
+ [_SC_NPROCESSORS_ONLN] = CPUCNT,
[_SC_PHYS_PAGES] = -1,
[_SC_AVPHYS_PAGES] = -1,
[_SC_ATEXIT_MAX] = -1,
} else if (values[name] == VER) {
return _POSIX_VERSION;
} else if (values[name] == OFLOW) {
- return ARG_MAX;
- } else {
- return values[name];
+ if (name == _SC_ARG_MAX) return ARG_MAX;
+ if (name == _SC_SEM_VALUE_MAX) return SEM_VALUE_MAX;
+ } else if (values[name] == CPUCNT) {
+ 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 if (values[name] < OFLOW) {
+ long lim[2];
+ __syscall(SYS_getrlimit, values[name]&16383, lim);
+ return lim[0] < 0 ? LONG_MAX : lim[0];
}
+ return values[name];
}