memcheck/tests/freebsd/aio_read.c

   1 // my_aio_read.c
   2 // from https://github.com/imyjf/apue/blob/master/my_aio_read.c
   3 // and I guess originally from APUE but it isn't in my second
   4 // edition (and I didn't keep the first edition)
   5 #include <unistd.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <fcntl.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <aio.h>
  12 #include <strings.h>
  13 #include <errno.h>
  14
  15 #define ERR_EXIT(msg) do { perror(msg); exit(1); } while(0)
  16
  17 int main() {
  18   int ret;
  19   char buf[64];
  20   struct aiocb my_aiocb;
  21
  22   bzero((char*)&my_aiocb, sizeof(struct aiocb));
  23
  24   my_aiocb.aio_buf = buf;
  25   my_aiocb.aio_fildes = STDIN_FILENO;
  26   my_aiocb.aio_nbytes = 64;
  27   my_aiocb.aio_offset = 0;
  28
  29   ret = aio_read(&my_aiocb);
  30   if (ret < 0) {
  31      ERR_EXIT("aio_read");
  32   }
  33
  34   while (aio_error(&my_aiocb) == EINPROGRESS) {
  35     //write(STDOUT_FILENO, ".", 1);
  36     sleep(1);
  37   }
  38
  39   ret = aio_return(&my_aiocb);
  40   if (ret < 0) {
  41      ERR_EXIT("aio_return");
  42   }
  43
  44   buf[ret] = '\0';
  45   printf("content: %s\n", buf);
  46
  47   return 0;
  48 }