servers/mfs/stadir.c

   1
   2
   3 #include "fs.h"
   4 #include <sys/stat.h>
   5 #include <sys/statfs.h>
   6 #include <minix/com.h>
   7 #include <string.h>
   8 #include "buf.h"
   9 #include "inode.h"
  10 #include "super.h"
  11
  12 #include <minix/vfsif.h>
  13
  14
  15 FORWARD _PROTOTYPE( int stat_inode, (struct inode *rip, int pipe_pos,
  16                         int who_e, cp_grant_id_t gid)                   );
  17
  18
  19 /*===========================================================================*
  20  *                              stat_inode                                   *
  21  *===========================================================================*/
  22 PRIVATE int stat_inode(rip, pipe_pos, who_e, gid)
  23 register struct inode *rip;     /* pointer to inode to stat */
  24 int pipe_pos;                   /* position in a pipe, supplied by fstat() */
  25 int who_e;                      /* Caller endpoint */
  26 cp_grant_id_t gid;              /* grant for the stat buf */
  27 {
  28 /* Common code for stat and fstat system calls. */
  29
  30   struct stat statbuf;
  31   mode_t mo;
  32   int r, s;
  33
  34   /* Update the atime, ctime, and mtime fields in the inode, if need be. */
  35   if (rip->i_update) update_times(rip);
  36
  37   /* Fill in the statbuf struct. */
  38   mo = rip->i_mode & I_TYPE;
  39
  40   /* true iff special */
  41   s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
  42
  43   statbuf.st_dev = rip->i_dev;
  44   statbuf.st_ino = rip->i_num;
  45   statbuf.st_mode = rip->i_mode;
  46   statbuf.st_nlink = rip->i_nlinks;
  47   statbuf.st_uid = rip->i_uid;
  48   statbuf.st_gid = rip->i_gid;
  49   statbuf.st_rdev = (dev_t) (s ? rip->i_zone[0] : NO_DEV);
  50   statbuf.st_size = rip->i_size;
  51
  52   if (rip->i_pipe == I_PIPE) {
  53         statbuf.st_mode &= ~I_REGULAR;  /* wipe out I_REGULAR bit for pipes */
  54         statbuf.st_size -= pipe_pos;
  55   }
  56
  57   statbuf.st_atime = rip->i_atime;
  58   statbuf.st_mtime = rip->i_mtime;
  59   statbuf.st_ctime = rip->i_ctime;
  60
  61   /* Copy the struct to user space. */
  62   r = sys_safecopyto(who_e, gid, 0, (vir_bytes) &statbuf,
  63                 (phys_bytes) sizeof(statbuf), D);
  64
  65   return(r);
  66 }
  67
  68
  69 /*===========================================================================*
  70  *                              fs_fstatfs                                   *
  71  *===========================================================================*/
  72 PUBLIC int fs_fstatfs()
  73 {
  74   struct statfs st;
  75   struct inode *rip;
  76   int r;
  77
  78   if ((rip = find_inode(fs_dev, fs_m_in.REQ_FD_INODE_NR))
  79           == NIL_INODE) {
  80       printf("FSfstatfs: couldn't find inode %d\n", fs_m_in.REQ_FD_INODE_NR);
  81       return EINVAL;
  82   }
  83
  84   st.f_bsize = rip->i_sp->s_block_size;
  85
  86   /* Copy the struct to user space. */
  87   r = sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0,
  88         (vir_bytes) &st, (phys_bytes) sizeof(st), D);
  89
  90   return(r);
  91 }
  92
  93 /*===========================================================================*
  94  *                             fs_stat                                       *
  95  *===========================================================================*/
  96 PUBLIC int fs_stat()
  97 {
  98   register int r;              /* return value */
  99   register struct inode *rip;  /* target inode */
 100
 101   if ( (rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE) {
 102 printf("MFS(%d) get_inode by fs_stat() failed\n", SELF_E);
 103         return(EINVAL);
 104   }
 105
 106   r = stat_inode(rip, 0, fs_m_in.m_source, fs_m_in.REQ_GRANT);
 107   put_inode(rip);               /* release the inode */
 108   return(r);
 109 }
 110
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 112