/*
* Like select(2) but set the signals to block while waiting in
* select.  This version is not entirely race condition safe. Only
* operating system support can make it so.
*/

#include <config.h>

#include <sys/time.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <unistd.h>
#include <signal.h>

int
pselect (int n,
        fd_set *readfds,
        fd_set *writefds,
        fd_set *exceptfds,
        const struct timespec *timeout,
        const sigset_t *sigmask)
{
       int result;
       sigset_t saved_sigmask;
       struct timeval saved_timeout;

       if (sigmask && sigprocmask(SIG_SETMASK, sigmask, &saved_sigmask) == -1)
               return -1;

       if (timeout) {
               saved_timeout.tv_sec = timeout->tv_sec;
               saved_timeout.tv_usec = timeout->tv_nsec / 1000;
               result = select(n, readfds, writefds, exceptfds, &saved_timeout);
       } else {
               result = select(n, readfds, writefds, exceptfds, NULL);
       }

       if (sigmask && sigprocmask(SIG_SETMASK, &saved_sigmask, NULL) == -1)
               return -1;

       return result;
}