minix/fs/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   uid_t uid;
  17   gid_t gid;
  18   dev_t dev;
  19
  20   uid = fs_m_in->m_vfs_fs_newnode.uid;
  21   gid = fs_m_in->m_vfs_fs_newnode.gid;
  22   bits = fs_m_in->m_vfs_fs_newnode.mode;
  23   dev = fs_m_in->m_vfs_fs_newnode.device;
  24
  25   /* Try to allocate the inode */
  26   if( (rip = alloc_inode(dev, bits, uid, gid) ) == NULL) return(err_code);
  27
  28   switch (bits & S_IFMT) {
  29         case S_IFBLK:
  30         case S_IFCHR:
  31                 rip->i_rdev = dev;              /* Major/minor dev numbers */
  32                 break;
  33         case S_IFIFO:
  34                 if ((get_block(dev, rip->i_num)) == NULL)
  35                         r = EIO;
  36                 break;
  37         default:
  38                 r = EIO; /* Unsupported file type */
  39   }
  40
  41   if (r != OK) {
  42         free_inode(rip);
  43   } else {
  44         /* Fill in the fields of the response message */
  45         fs_m_out->m_fs_vfs_newnode.inode = rip->i_num;
  46         fs_m_out->m_fs_vfs_newnode.mode = rip->i_mode;
  47         fs_m_out->m_fs_vfs_newnode.file_size = rip->i_size;
  48         fs_m_out->m_fs_vfs_newnode.uid = rip->i_uid;
  49         fs_m_out->m_fs_vfs_newnode.gid = rip->i_gid;
  50         fs_m_out->m_fs_vfs_newnode.device = dev;
  51   }
  52
  53   return(r);
  54 }