lib/libc/sys-minix/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/ioc_disk.h>
  21
  22 #include <unistd.h>
  23
  24 /*================================================================
  25  *                    minix_sizeup  -  determine device size
  26  *===============================================================*/
  27 int minix_sizeup(device, bytes)
  28 char *device;
  29 u64_t *bytes;
  30 {
  31   int fd;
  32   struct partition entry;
  33   struct stat st;
  34
  35   if ((fd = open(device, O_RDONLY)) == -1) {
  36         if (errno != ENOENT)
  37                 perror("sizeup open");
  38         return -1;
  39   }
  40   if (ioctl(fd, DIOCGETP, &entry) == -1) {
  41         perror("sizeup ioctl");
  42         if(fstat(fd, &st) < 0) {
  43                 perror("fstat");
  44                 entry.size = cvu64(0);
  45         } else {
  46                 entry.size = cvu64(st.st_size);
  47         }
  48   }
  49   close(fd);
  50   *bytes = entry.size;
  51   return 0;
  52 }