minix/lib/libc/sys/sizeup.c

   1 #include <sys/cdefs.h>
   2 #include "namespace.h"
   3 #include <lib.h>
   4 #include <minix/u64.h>
   5 #include <sys/types.h>
   6 #include <sys/stat.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <fcntl.h>
  10 #include <limits.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #include <unistd.h>
  15 #include <minix/config.h>
  16 #include <minix/const.h>
  17 #include <minix/type.h>
  18 #include <minix/minlib.h>
  19 #include <minix/partition.h>
  20 #include <sys/ioctl.h>
  21 #include <sys/ioc_disk.h>
  22
  23 #include <unistd.h>
  24
  25 /*================================================================
  26  *                    minix_sizeup  -  determine device size
  27  *===============================================================*/
  28 int minix_sizeup(device, bytes)
  29 char *device;
  30 u64_t *bytes;
  31 {
  32   int fd;
  33   struct part_geom entry;
  34   struct stat st;
  35
  36   if ((fd = open(device, O_RDONLY)) == -1) {
  37         if (errno != ENOENT)
  38                 perror("sizeup open");
  39         return -1;
  40   }
  41   if (ioctl(fd, DIOCGETP, &entry) == -1) {
  42         perror("sizeup ioctl");
  43         if(fstat(fd, &st) < 0) {
  44                 perror("fstat");
  45                 entry.size = ((u64_t)(0));
  46         } else {
  47                 entry.size = ((u64_t)(st.st_size));
  48         }
  49   }
  50   close(fd);
  51   *bytes = entry.size;
  52   return 0;
  53 }