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