mailing list of musl libc

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 #include <sys/select.h>
#include "syscall.h"
#include "libc.h"

int select(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, struct timeval *restrict tv)
{
#ifdef SYS_select
	return syscall_cp(SYS_select, n, rfds, wfds, efds, tv);
#else
	long data[2] = { 0, _NSIG/8 };
	struct timespec ts;
	if (tv) {
		ts.tv_sec = tv->tv_sec;
		ts.tv_nsec = tv->tv_usec * 1000;
	}
	return syscall_cp(SYS_pselect6, n, rfds, wfds, efds, tv ? &ts : 0, data);
#endif
}