tools-for-build/os-provides-poll-test.c

   1 /* test to build and run so that we know if we have poll that works on
   2  * stdin and /dev/zero -- which is hopefully a sufficient sample to weed
   3  * out crappy versions like that on Darwin.
   4  */
   5
   6 #include <fcntl.h>
   7 #include <poll.h>
   8
   9 int main ()
  10 {
  11     struct pollfd fds;
  12
  13     fds.fd = 0;
  14     fds.events = POLLIN|POLLPRI;
  15     fds.revents = 0;
  16     if (!((1 == poll(&fds, 1, -1)) && ((POLLIN|POLLPRI) & fds.revents)))
  17         return 0;
  18
  19     fds.fd = open("/dev/zero", O_RDONLY);
  20     fds.events = POLLIN|POLLPRI;
  21     fds.revents = 0;
  22     if (!((1 == poll(&fds, 1, -1)) && ((POLLIN|POLLPRI) & fds.revents)))
  23         return 0;
  24
  25     return 104;
  26 }