servers/mfs/time.c

   1
   2
   3
   4 #include "fs.h"
   5 #include <minix/callnr.h>
   6 #include <minix/com.h>
   7 #include "inode.h"
   8
   9 #include <minix/vfsif.h>
  10
  11
  12 /*===========================================================================*
  13  *                              fs_utime                                     *
  14  *===========================================================================*/
  15 PUBLIC int fs_utime()
  16 {
  17   register struct inode *rip;
  18   register int r;
  19
  20   caller_uid = fs_m_in.REQ_UID;
  21   caller_gid = fs_m_in.REQ_GID;
  22
  23   /* Temporarily open the file. */
  24   if ( (rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE) {
  25 printf("MFS(%d) get_inode by fs_utime() failed\n", SELF_E);
  26         return(EINVAL);
  27   }
  28
  29   /* Only the owner of a file or the super_user can change its time. */
  30   r = OK;
  31   if (rip->i_uid != caller_uid && caller_uid != SU_UID) r = EPERM;
  32   if (fs_m_in.REQ_ACTIME == 0 && r != OK) r = forbidden(rip, W_BIT);
  33   if (read_only(rip) != OK) r = EROFS;  /* not even su can touch if R/O */
  34   if (r == OK) {
  35         if (fs_m_in.REQ_ACTIME == 0) {
  36                 rip->i_atime = fs_m_in.REQ_MODTIME;
  37                 rip->i_mtime = rip->i_atime;
  38         } else {
  39                 rip->i_atime = fs_m_in.REQ_ACTIME;
  40                 rip->i_mtime = fs_m_in.REQ_MODTIME;
  41         }
  42         rip->i_update = CTIME;  /* discard any stale ATIME and MTIME flags */
  43         rip->i_dirt = DIRTY;
  44   }
  45
  46   put_inode(rip);
  47   return(r);
  48 }
  49
  50 PUBLIC int fs_stime()
  51 {
  52   boottime = fs_m_in.REQ_BOOTTIME;
  53 printf("MFS(%d) boottime: %d\n", SELF_E, boottime);
  54   return OK;
  55 }
  56