fileops/readwd.c

   1 /*  WARNING: I got spontaneous hangups with the following code in NetBSD 4.99.20
   2    compile with:
   3    gcc readwd.c -o readwd -Wall -W -Wextra -ansi -pedantic */
   4
   5 #include <fcntl.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <dev/ata/atareg.h>
  10 #include <sys/ataio.h>
  11 #include <sys/ioctl.h>
  12 #include <sys/param.h>
  13
  14 int main(int argc, char *argv[])
  15 {
  16     int fd;
  17     unsigned int i;
  18     struct atareq req;
  19     union {
  20         unsigned char inbuf[DEV_BSIZE];
  21         struct ataparams inqbuf;
  22     } inbuf;
  23     u_int16_t *p;
  24
  25     /* check argument count */
  26     if (argc != 2) {
  27         fprintf(stderr, "usage: %s /dev/file\n", argv[0]);
  28         exit(EXIT_FAILURE);
  29     }
  30
  31     /* open device file descriptor */
  32     if ((fd = open(argv[1], O_RDONLY)) == -1) {
  33         perror("open");
  34         exit(EXIT_FAILURE);
  35     }
  36
  37     /* construct an ata request */
  38     memset(&req, 0, sizeof req);
  39     req.flags = ATACMD_READ;
  40     req.command = WDCC_IDENTIFY;
  41     req.databuf = (caddr_t) &inbuf;
  42     req.datalen = sizeof(inbuf);
  43     req.timeout = 1000;    /* 1 sec */
  44
  45     /* make the ioctl call */
  46     if (ioctl(fd, ATAIOCCOMMAND, &req) == -1) {
  47         perror("ioctl");
  48         exit(EXIT_FAILURE);
  49     }
  50
  51     /* handle ata request return status */
  52     switch (req.retsts) {
  53     case ATACMD_OK:
  54         break;
  55     case ATACMD_TIMEOUT:
  56         fprintf(stderr, "ata request timed out\n");
  57         exit(EXIT_FAILURE);
  58     case ATACMD_DF:
  59         fprintf(stderr, "ata device returned a device fault\n");
  60         exit(EXIT_FAILURE);
  61     case ATACMD_ERROR:
  62         fprintf(stderr, "ata device returned error code: %0x\n", req.error);
  63         exit(EXIT_FAILURE);
  64     default:
  65         fprintf(stderr, "unknown ata request return status: %d\n", req.retsts);
  66         exit(EXIT_FAILURE);
  67     }
  68
  69     /* print the model */
  70     for (i = 0; i < sizeof(inbuf.inqbuf.atap_model); i+=2) {
  71         p = (u_int16_t *) (inbuf.inqbuf.atap_model + i);
  72         *p = ntohs(*p);
  73     }
  74
  75     for (i = 0; i < sizeof(inbuf.inqbuf.atap_model); i++)
  76             printf("%c", inbuf.inqbuf.atap_model[i]);
  77
  78     /* close file descriptor */
  79     close(fd);
  80
  81     return EXIT_SUCCESS;
  82 }