servers/mfs/time.c

   1 #include "fs.h"
   2 #include <minix/callnr.h>
   3 #include <minix/com.h>
   4 #include "inode.h"
   5 #include <minix/vfsif.h>
   6
   7
   8 /*===========================================================================*
   9  *                              fs_utime                                     *
  10  *===========================================================================*/
  11 PUBLIC int fs_utime()
  12 {
  13   register struct inode *rip;
  14   register int r;
  15
  16   /* Temporarily open the file. */
  17   if( (rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE)
  18         return(EINVAL);
  19
  20   /* Only the owner of a file or the super_user can change its time. */
  21   r = OK;
  22   if(read_only(rip) != OK) r = EROFS;   /* not even su can touch if R/O */
  23   if(r == OK) {
  24           rip->i_atime = fs_m_in.REQ_ACTIME;
  25           rip->i_mtime = fs_m_in.REQ_MODTIME;
  26           rip->i_update = CTIME; /* discard any stale ATIME and MTIME flags */
  27           rip->i_dirt = DIRTY;
  28   }
  29
  30   put_inode(rip);
  31   return(r);
  32 }
  33