lib/libhgfs/attr.c

   1 /* Part of libhgfs - (c) 2009, D.C. van Moolenbroek */
   2
   3 #include "inc.h"
   4
   5 #include <sys/stat.h>
   6
   7 /*===========================================================================*
   8  *                              attr_get                                     *
   9  *===========================================================================*/
  10 void attr_get(attr)
  11 struct sffs_attr *attr;
  12 {
  13 /* Get attribute information from the RPC buffer, storing the requested parts
  14  * in the given attr structure.
  15  */
  16   mode_t mode;
  17   u32_t size_lo, size_hi;
  18
  19   mode = (RPC_NEXT32) ? S_IFDIR : S_IFREG;
  20
  21   size_lo = RPC_NEXT32;
  22   size_hi = RPC_NEXT32;
  23   if (attr->a_mask & SFFS_ATTR_SIZE)
  24         attr->a_size = make64(size_lo, size_hi);
  25
  26   time_get((attr->a_mask & SFFS_ATTR_CRTIME) ? &attr->a_crtime : NULL);
  27   time_get((attr->a_mask & SFFS_ATTR_ATIME) ? &attr->a_atime : NULL);
  28   time_get((attr->a_mask & SFFS_ATTR_MTIME) ? &attr->a_mtime : NULL);
  29   time_get((attr->a_mask & SFFS_ATTR_CTIME) ? &attr->a_ctime : NULL);
  30
  31   mode |= HGFS_PERM_TO_MODE(RPC_NEXT8);
  32   if (attr->a_mask & SFFS_ATTR_MODE) attr->a_mode = mode;
  33 }
  34
  35 /*===========================================================================*
  36  *                              hgfs_getattr                                 *
  37  *===========================================================================*/
  38 int hgfs_getattr(path, attr)
  39 char *path;
  40 struct sffs_attr *attr;
  41 {
  42 /* Get selected attributes of a file by path name.
  43  */
  44   int r;
  45
  46   RPC_REQUEST(HGFS_REQ_GETATTR);
  47
  48   path_put(path);
  49
  50   if ((r = rpc_query()) != OK)
  51         return r;
  52
  53   attr_get(attr);
  54
  55   return OK;
  56 }
  57
  58 /*===========================================================================*
  59  *                              hgfs_setattr                                 *
  60  *===========================================================================*/
  61 int hgfs_setattr(path, attr)
  62 char *path;
  63 struct sffs_attr *attr;
  64 {
  65 /* Set selected attributes of a file by path name.
  66  */
  67   u8_t mask;
  68
  69   RPC_REQUEST(HGFS_REQ_SETATTR);
  70
  71   /* This library implements the HGFS v1 protocol, which is largely
  72    * path-oriented. This is the only method to set the file size, and thus,
  73    * truncating a deleted file is not possible. This has been fixed in later
  74    * HGFS protocol version (v2/v3).
  75    */
  76   mask = 0;
  77   if (attr->a_mask & SFFS_ATTR_MODE) mask |= HGFS_ATTR_MODE;
  78   if (attr->a_mask & SFFS_ATTR_SIZE) mask |= HGFS_ATTR_SIZE;
  79   if (attr->a_mask & SFFS_ATTR_CRTIME) mask |= HGFS_ATTR_CRTIME;
  80   if (attr->a_mask & SFFS_ATTR_ATIME)
  81         mask |= HGFS_ATTR_ATIME | HGFS_ATTR_ATIME_SET;
  82   if (attr->a_mask & SFFS_ATTR_MTIME)
  83         mask |= HGFS_ATTR_MTIME | HGFS_ATTR_MTIME_SET;
  84   if (attr->a_mask & SFFS_ATTR_CTIME) mask |= HGFS_ATTR_CTIME;
  85
  86   RPC_NEXT8 = mask;
  87
  88   RPC_NEXT32 = !!(S_ISDIR(attr->a_mode));
  89   RPC_NEXT32 = ex64lo(attr->a_size);
  90   RPC_NEXT32 = ex64hi(attr->a_size);
  91
  92   time_put((attr->a_mask & HGFS_ATTR_CRTIME) ? &attr->a_crtime : NULL);
  93   time_put((attr->a_mask & HGFS_ATTR_ATIME) ? &attr->a_atime : NULL);
  94   time_put((attr->a_mask & HGFS_ATTR_MTIME) ? &attr->a_mtime : NULL);
  95   time_put((attr->a_mask & HGFS_ATTR_CTIME) ? &attr->a_ctime : NULL);
  96
  97   RPC_NEXT8 = HGFS_MODE_TO_PERM(attr->a_mode);
  98
  99   path_put(path);
 100
 101   return rpc_query();
 102 }