servers/iso9660fs/misc.c

   1 #include "inc.h"
   2 #include <fcntl.h>
   3 #include <minix/vfsif.h>
   4 #include <minix/bdev.h>
   5
   6
   7 /*===========================================================================*
   8  *                              fs_sync                                      *
   9  *===========================================================================*/
  10 int fs_sync()
  11 {
  12   /* Always mounted read only, so nothing to sync */
  13   return(OK);           /* sync() can't fail */
  14 }
  15
  16
  17 /*===========================================================================*
  18  *                              fs_new_driver                                *
  19  *===========================================================================*/
  20 int fs_new_driver(void)
  21 {
  22 /* Set a new driver endpoint for this device. */
  23   dev_t dev;
  24   cp_grant_id_t label_gid;
  25   size_t label_len;
  26   char label[sizeof(fs_dev_label)];
  27   int r;
  28
  29   dev = (dev_t) fs_m_in.REQ_DEV;
  30   label_gid = (cp_grant_id_t) fs_m_in.REQ_GRANT;
  31   label_len = (size_t) fs_m_in.REQ_PATH_LEN;
  32
  33   if (label_len > sizeof(label))
  34         return(EINVAL);
  35
  36   r = sys_safecopyfrom(fs_m_in.m_source, label_gid, (vir_bytes) 0,
  37         (vir_bytes) label, label_len);
  38
  39   if (r != OK) {
  40         printf("ISOFS: fs_new_driver safecopyfrom failed (%d)\n", r);
  41         return(EINVAL);
  42   }
  43
  44   bdev_driver(dev, label);
  45
  46   return(OK);
  47 }