servers/pfs/open.c

   1 #include "fs.h"
   2 #include <sys/stat.h>
   3 #include "buf.h"
   4 #include "inode.h"
   5 #include <minix/vfsif.h>
   6
   7
   8 /*===========================================================================*
   9  *                              fs_newnode                                   *
  10  *===========================================================================*/
  11 int fs_newnode(message *fs_m_in, message *fs_m_out)
  12 {
  13   register int r = OK;
  14   mode_t bits;
  15   struct inode *rip;
  16   dev_t dev;
  17
  18   caller_uid = (uid_t) fs_m_in->REQ_UID;
  19   caller_gid = (gid_t) fs_m_in->REQ_GID;
  20   bits = (mode_t) fs_m_in->REQ_MODE;
  21   dev = (dev_t) fs_m_in->REQ_DEV;
  22
  23   /* Try to allocate the inode */
  24   if( (rip = alloc_inode(dev, bits) ) == NULL) return(err_code);
  25
  26   switch (bits & S_IFMT) {
  27         case S_IFBLK:
  28         case S_IFCHR:
  29                 rip->i_rdev = dev;              /* Major/minor dev numbers */
  30                 break;
  31         case S_IFIFO:
  32                 if ((get_block(dev, rip->i_num)) == NULL)
  33                         r = EIO;
  34                 break;
  35         default:
  36                 r = EIO; /* Unsupported file type */
  37   }
  38
  39   if (r != OK) {
  40         free_inode(rip);
  41   } else {
  42         /* Fill in the fields of the response message */
  43         fs_m_out->RES_INODE_NR = rip->i_num;
  44         fs_m_out->RES_MODE = rip->i_mode;
  45         fs_m_out->RES_FILE_SIZE_LO = rip->i_size;
  46         fs_m_out->RES_UID = rip->i_uid;
  47         fs_m_out->RES_GID = rip->i_gid;
  48         fs_m_out->RES_DEV = dev;
  49   }
  50
  51   return(r);
  52 }