memcheck/tests/linux/check_preadv2_pwritev2.c

   1 #include <sys/syscall.h>
   2 #include <errno.h>
   3 #include <unistd.h>
   4 #include <stddef.h>
   5
   6 int main(int argc, char **argv)
   7 {
   8    int has_preadv2 = 0;
   9    int has_pwritev2 = 0;
  10 #if defined(__NR_preadv2)
  11    errno = 0;
  12    syscall(__NR_preadv2, 0, NULL, 0, 0, 0);
  13    has_preadv2 = errno != ENOSYS;
  14 #else
  15    has_preadv2 = 0;
  16 #endif
  17
  18 #if defined(__NR_pwritev2)
  19    errno = 0;
  20    syscall(__NR_pwritev2, 0, NULL, 0, 0, 0);
  21    has_pwritev2 = errno != ENOSYS;
  22 #else
  23    has_pwritev2 = 0;
  24 #endif
  25
  26    return !(has_preadv2 && has_pwritev2);
  27 }