minix/lib/libhgfs/attr.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

102 lines
3 KiB
C

/* Part of libhgfs - (c) 2009, D.C. van Moolenbroek */
#include "inc.h"
#include <sys/stat.h>
/*===========================================================================*
* attr_get *
*===========================================================================*/
void attr_get(attr)
struct sffs_attr *attr;
{
/* Get attribute information from the RPC buffer, storing the requested parts
* in the given attr structure.
*/
mode_t mode;
u32_t size_lo, size_hi;
mode = (RPC_NEXT32) ? S_IFDIR : S_IFREG;
size_lo = RPC_NEXT32;
size_hi = RPC_NEXT32;
if (attr->a_mask & SFFS_ATTR_SIZE)
attr->a_size = make64(size_lo, size_hi);
time_get((attr->a_mask & SFFS_ATTR_CRTIME) ? &attr->a_crtime : NULL);
time_get((attr->a_mask & SFFS_ATTR_ATIME) ? &attr->a_atime : NULL);
time_get((attr->a_mask & SFFS_ATTR_MTIME) ? &attr->a_mtime : NULL);
time_get((attr->a_mask & SFFS_ATTR_CTIME) ? &attr->a_ctime : NULL);
mode |= HGFS_PERM_TO_MODE(RPC_NEXT8);
if (attr->a_mask & SFFS_ATTR_MODE) attr->a_mode = mode;
}
/*===========================================================================*
* hgfs_getattr *
*===========================================================================*/
int hgfs_getattr(path, attr)
char *path;
struct sffs_attr *attr;
{
/* Get selected attributes of a file by path name.
*/
int r;
RPC_REQUEST(HGFS_REQ_GETATTR);
path_put(path);
if ((r = rpc_query()) != OK)
return r;
attr_get(attr);
return OK;
}
/*===========================================================================*
* hgfs_setattr *
*===========================================================================*/
int hgfs_setattr(path, attr)
char *path;
struct sffs_attr *attr;
{
/* Set selected attributes of a file by path name.
*/
u8_t mask;
RPC_REQUEST(HGFS_REQ_SETATTR);
/* This library implements the HGFS v1 protocol, which is largely
* path-oriented. This is the only method to set the file size, and thus,
* truncating a deleted file is not possible. This has been fixed in later
* HGFS protocol version (v2/v3).
*/
mask = 0;
if (attr->a_mask & SFFS_ATTR_MODE) mask |= HGFS_ATTR_MODE;
if (attr->a_mask & SFFS_ATTR_SIZE) mask |= HGFS_ATTR_SIZE;
if (attr->a_mask & SFFS_ATTR_CRTIME) mask |= HGFS_ATTR_CRTIME;
if (attr->a_mask & SFFS_ATTR_ATIME)
mask |= HGFS_ATTR_ATIME | HGFS_ATTR_ATIME_SET;
if (attr->a_mask & SFFS_ATTR_MTIME)
mask |= HGFS_ATTR_MTIME | HGFS_ATTR_MTIME_SET;
if (attr->a_mask & SFFS_ATTR_CTIME) mask |= HGFS_ATTR_CTIME;
RPC_NEXT8 = mask;
RPC_NEXT32 = !!(S_ISDIR(attr->a_mode));
RPC_NEXT32 = ex64lo(attr->a_size);
RPC_NEXT32 = ex64hi(attr->a_size);
time_put((attr->a_mask & HGFS_ATTR_CRTIME) ? &attr->a_crtime : NULL);
time_put((attr->a_mask & HGFS_ATTR_ATIME) ? &attr->a_atime : NULL);
time_put((attr->a_mask & HGFS_ATTR_MTIME) ? &attr->a_mtime : NULL);
time_put((attr->a_mask & HGFS_ATTR_CTIME) ? &attr->a_ctime : NULL);
RPC_NEXT8 = HGFS_MODE_TO_PERM(attr->a_mode);
path_put(path);
return rpc_query();
}