servers/mfs/stadir.c

   1 #include "fs.h"
   2 #include <sys/stat.h>
   3 #include <sys/statfs.h>
   4 #include <minix/com.h>
   5 #include <string.h>
   6 #include "buf.h"
   7 #include "inode.h"
   8 #include "super.h"
   9 #include <minix/vfsif.h>
  10
  11 FORWARD _PROTOTYPE( int stat_inode, (struct inode *rip, int who_e,
  12                                      cp_grant_id_t gid)                 );
  13
  14
  15 /*===========================================================================*
  16  *                              stat_inode                                   *
  17  *===========================================================================*/
  18 PRIVATE int stat_inode(rip, who_e, gid)
  19 register struct inode *rip;     /* pointer to inode to stat */
  20 int who_e;                      /* Caller endpoint */
  21 cp_grant_id_t gid;              /* grant for the stat buf */
  22 {
  23 /* Common code for stat and fstat system calls. */
  24
  25   struct stat statbuf;
  26   mode_t mo;
  27   int r, s;
  28
  29   /* Update the atime, ctime, and mtime fields in the inode, if need be. */
  30   if (rip->i_update) update_times(rip);
  31
  32   /* Fill in the statbuf struct. */
  33   mo = rip->i_mode & I_TYPE;
  34
  35   /* true iff special */
  36   s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
  37
  38   statbuf.st_dev = rip->i_dev;
  39   statbuf.st_ino = rip->i_num;
  40   statbuf.st_mode = rip->i_mode;
  41   statbuf.st_nlink = rip->i_nlinks;
  42   statbuf.st_uid = rip->i_uid;
  43   statbuf.st_gid = rip->i_gid;
  44   statbuf.st_rdev = (dev_t) (s ? rip->i_zone[0] : NO_DEV);
  45   statbuf.st_size = rip->i_size;
  46   statbuf.st_atime = rip->i_atime;
  47   statbuf.st_mtime = rip->i_mtime;
  48   statbuf.st_ctime = rip->i_ctime;
  49
  50   /* Copy the struct to user space. */
  51   r = sys_safecopyto(who_e, gid, 0, (vir_bytes) &statbuf,
  52                 (phys_bytes) sizeof(statbuf), D);
  53
  54   return(r);
  55 }
  56
  57
  58 /*===========================================================================*
  59  *                              fs_fstatfs                                   *
  60  *===========================================================================*/
  61 PUBLIC int fs_fstatfs()
  62 {
  63   struct statfs st;
  64   struct inode *rip;
  65   int r;
  66
  67   if((rip = find_inode(fs_dev, ROOT_INODE)) == NIL_INODE)
  68           return(EINVAL);
  69
  70   st.f_bsize = rip->i_sp->s_block_size;
  71
  72   /* Copy the struct to user space. */
  73   r = sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0, (vir_bytes) &st,
  74                      (phys_bytes) sizeof(st), D);
  75
  76   return(r);
  77 }
  78
  79
  80 /*===========================================================================*
  81  *                             fs_stat                                       *
  82  *===========================================================================*/
  83 PUBLIC int fs_stat()
  84 {
  85   register int r;              /* return value */
  86   register struct inode *rip;  /* target inode */
  87
  88   if ((rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE)
  89         return(EINVAL);
  90
  91   r = stat_inode(rip, fs_m_in.m_source, fs_m_in.REQ_GRANT);
  92   put_inode(rip);               /* release the inode */
  93   return(r);
  94 }
  95