minix/lib/libhgfs/dir.c
David van Moolenbroek ef7b484e5c Create SFFS library out of HGFS
This Shared Folders File System library (libsffs) now contains all the
file system logic originally in HGFS. The actual HGFS server code is
now a stub that passes on all the work to libsffs. The libhgfs library
is changed accordingly.
2012-04-09 18:08:26 +02:00

79 lines
2.1 KiB
C

/* Part of libhgfs - (c) 2009, D.C. van Moolenbroek */
#include "inc.h"
/*===========================================================================*
* hgfs_opendir *
*===========================================================================*/
int hgfs_opendir(path, handle)
char *path;
sffs_dir_t *handle;
{
/* Open a directory. Store a directory handle upon success.
*/
int r;
RPC_REQUEST(HGFS_REQ_OPENDIR);
path_put(path);
if ((r = rpc_query()) != OK)
return r;
*handle = (sffs_dir_t)RPC_NEXT32;
return OK;
}
/*===========================================================================*
* hgfs_readdir *
*===========================================================================*/
int hgfs_readdir(handle, index, buf, size, attr)
sffs_dir_t handle;
unsigned int index;
char *buf;
size_t size;
struct sffs_attr *attr;
{
/* Read a directory entry from an open directory, using a zero-based index
* number. Upon success, the resulting path name is stored in the given buffer
* and the given attribute structure is filled selectively as requested. Upon
* error, the contents of the path buffer and attribute structure are
* undefined. ENOENT is returned upon end of directory.
*/
int r;
RPC_REQUEST(HGFS_REQ_READDIR);
RPC_NEXT32 = (u32_t)handle;
RPC_NEXT32 = index;
/* EINVAL signifies end of directory. */
if ((r = rpc_query()) != OK)
return (r == EINVAL) ? ENOENT : OK;
attr_get(attr);
if ((r = path_get(buf, size)) != OK)
return r;
/* VMware Player 3 returns an empty name, instead of EINVAL, when reading
* from an EOF position right after opening the directory handle. Seems to be
* a newly introduced bug..
*/
return (!buf[0]) ? ENOENT : OK;
}
/*===========================================================================*
* hgfs_closedir *
*===========================================================================*/
int hgfs_closedir(handle)
sffs_dir_t handle;
{
/* Close an open directory.
*/
RPC_REQUEST(HGFS_REQ_CLOSEDIR);
RPC_NEXT32 = (u32_t)handle;
return rpc_query();
}