326 lines
7.9 KiB
C++
326 lines
7.9 KiB
C++
/* fhandler_netdrive.cc: fhandler for // and //MACHINE handling
|
|
|
|
Copyright 2005, 2006, 2007, 2008, 2009, 2010 Red Hat, Inc.
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#include "winsup.h"
|
|
#include <stdlib.h>
|
|
#include "cygerrno.h"
|
|
#include "security.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
#include "dtable.h"
|
|
#include "cygheap.h"
|
|
#include "cygthread.h"
|
|
#include <winnetwk.h>
|
|
|
|
#include <dirent.h>
|
|
|
|
enum
|
|
{
|
|
GET_RESOURCE_OPENENUM = 1,
|
|
GET_RESOURCE_OPENENUMTOP = 2,
|
|
GET_RESOURCE_ENUM = 3
|
|
};
|
|
|
|
struct netdriveinf
|
|
{
|
|
int what;
|
|
int ret;
|
|
PVOID in;
|
|
PVOID out;
|
|
DWORD outsize;
|
|
HANDLE sem;
|
|
};
|
|
|
|
struct net_hdls
|
|
{
|
|
HANDLE net;
|
|
HANDLE dom;
|
|
};
|
|
|
|
static DWORD WINAPI
|
|
thread_netdrive (void *arg)
|
|
{
|
|
netdriveinf *ndi = (netdriveinf *) arg;
|
|
char provider[256], *dummy = NULL;
|
|
LPNETRESOURCE nro;
|
|
DWORD cnt, size;
|
|
struct net_hdls *nh;
|
|
|
|
ReleaseSemaphore (ndi->sem, 1, NULL);
|
|
switch (ndi->what)
|
|
{
|
|
case GET_RESOURCE_OPENENUMTOP:
|
|
nro = (LPNETRESOURCE) alloca (size = 4096);
|
|
nh = (struct net_hdls *) ndi->out;
|
|
ndi->ret = WNetGetProviderName (WNNC_NET_LANMAN, provider,
|
|
(size = 256, &size));
|
|
if (ndi->ret != NO_ERROR)
|
|
break;
|
|
memset (nro, 0, sizeof *nro);
|
|
nro->dwScope = RESOURCE_GLOBALNET;
|
|
nro->dwType = RESOURCETYPE_ANY;
|
|
nro->dwDisplayType = RESOURCEDISPLAYTYPE_GROUP;
|
|
nro->dwUsage = RESOURCEUSAGE_RESERVED | RESOURCEUSAGE_CONTAINER;
|
|
nro->lpRemoteName = provider;
|
|
nro->lpProvider = provider;
|
|
ndi->ret = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
|
|
RESOURCEUSAGE_ALL, nro, &nh->net);
|
|
if (ndi->ret != NO_ERROR)
|
|
break;
|
|
while ((ndi->ret = WNetEnumResource (nh->net, (cnt = 1, &cnt), nro,
|
|
(size = 4096, &size))) == NO_ERROR)
|
|
{
|
|
ndi->ret = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
|
|
RESOURCEUSAGE_ALL, nro, &nh->dom);
|
|
if (ndi->ret == NO_ERROR)
|
|
break;
|
|
}
|
|
break;
|
|
case GET_RESOURCE_OPENENUM:
|
|
nro = (LPNETRESOURCE) alloca (size = 4096);
|
|
nh = (struct net_hdls *) ndi->out;
|
|
ndi->ret = WNetGetProviderName (WNNC_NET_LANMAN, provider,
|
|
(size = 256, &size));
|
|
if (ndi->ret != NO_ERROR)
|
|
break;
|
|
((LPNETRESOURCE) ndi->in)->lpProvider = provider;
|
|
ndi->ret = WNetGetResourceInformation ((LPNETRESOURCE) ndi->in,
|
|
nro, &size, &dummy);
|
|
if (ndi->ret != NO_ERROR)
|
|
break;
|
|
ndi->ret = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
|
|
RESOURCEUSAGE_ALL, nro, &nh->dom);
|
|
break;
|
|
case GET_RESOURCE_ENUM:
|
|
nh = (struct net_hdls *) ndi->in;
|
|
if (!nh->dom)
|
|
{
|
|
ndi->ret = ERROR_NO_MORE_ITEMS;
|
|
break;
|
|
}
|
|
while ((ndi->ret = WNetEnumResource (nh->dom, (cnt = 1, &cnt),
|
|
(LPNETRESOURCE) ndi->out,
|
|
&ndi->outsize)) != NO_ERROR
|
|
&& nh->net)
|
|
{
|
|
WNetCloseEnum (nh->dom);
|
|
nh->dom = NULL;
|
|
nro = (LPNETRESOURCE) alloca (size = 4096);
|
|
while ((ndi->ret = WNetEnumResource (nh->net, (cnt = 1, &cnt), nro,
|
|
(size = 4096, &size))) == NO_ERROR)
|
|
{
|
|
ndi->ret = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
|
|
RESOURCEUSAGE_ALL, nro, &nh->dom);
|
|
if (ndi->ret == NO_ERROR)
|
|
break;
|
|
}
|
|
if (ndi->ret != NO_ERROR)
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
ReleaseSemaphore (ndi->sem, 1, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static DWORD
|
|
create_thread_and_wait (int what, PVOID in, PVOID out, DWORD outsize,
|
|
const char *name)
|
|
{
|
|
netdriveinf ndi = { what, 0, in, out, outsize,
|
|
CreateSemaphore (&sec_none_nih, 0, 2, NULL) };
|
|
cygthread *thr = new cygthread (thread_netdrive, &ndi, name);
|
|
if (thr->detach (ndi.sem))
|
|
ndi.ret = ERROR_OPERATION_ABORTED;
|
|
CloseHandle (ndi.sem);
|
|
return ndi.ret;
|
|
}
|
|
|
|
/* Returns 0 if path doesn't exist, >0 if path is a directory,
|
|
-1 if path is a file, -2 if it's a symlink. */
|
|
virtual_ftype_t
|
|
fhandler_netdrive::exists ()
|
|
{
|
|
char *to;
|
|
const char *from;
|
|
size_t len = strlen (get_name ());
|
|
if (len == 2)
|
|
return virt_rootdir;
|
|
char namebuf[len + 1];
|
|
for (to = namebuf, from = get_name (); *from; to++, from++)
|
|
*to = (*from == '/') ? '\\' : *from;
|
|
*to = '\0';
|
|
|
|
struct net_hdls nh = { NULL, NULL };
|
|
NETRESOURCE nr = {0};
|
|
nr.dwType = RESOURCETYPE_DISK;
|
|
nr.lpRemoteName = namebuf;
|
|
DWORD ret = create_thread_and_wait (GET_RESOURCE_OPENENUM,
|
|
&nr, &nh, 0, "WNetOpenEnum");
|
|
if (nh.dom)
|
|
WNetCloseEnum (nh.dom);
|
|
return ret != NO_ERROR ? virt_none : virt_directory;
|
|
}
|
|
|
|
fhandler_netdrive::fhandler_netdrive ():
|
|
fhandler_virtual ()
|
|
{
|
|
}
|
|
|
|
int
|
|
fhandler_netdrive::fstat (struct __stat64 *buf)
|
|
{
|
|
const char *path = get_name ();
|
|
debug_printf ("fstat (%s)", path);
|
|
|
|
fhandler_base::fstat (buf);
|
|
|
|
buf->st_mode = S_IFDIR | STD_RBITS | STD_XBITS;
|
|
buf->st_ino = get_ino ();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fhandler_netdrive::readdir (DIR *dir, dirent *de)
|
|
{
|
|
NETRESOURCE *nro;
|
|
DWORD ret;
|
|
int res;
|
|
|
|
if (!dir->__d_position)
|
|
{
|
|
size_t len = strlen (get_name ());
|
|
char *namebuf = NULL;
|
|
NETRESOURCE nr = { 0 };
|
|
struct net_hdls *nh;
|
|
|
|
if (len != 2) /* // */
|
|
{
|
|
const char *from;
|
|
char *to;
|
|
namebuf = (char *) alloca (len + 1);
|
|
for (to = namebuf, from = get_name (); *from; to++, from++)
|
|
*to = (*from == '/') ? '\\' : *from;
|
|
*to = '\0';
|
|
}
|
|
|
|
nr.lpRemoteName = namebuf;
|
|
nr.dwType = RESOURCETYPE_DISK;
|
|
nh = (struct net_hdls *) ccalloc (HEAP_FHANDLER, 1, sizeof *nh);
|
|
ret = create_thread_and_wait (len == 2 ? GET_RESOURCE_OPENENUMTOP
|
|
: GET_RESOURCE_OPENENUM,
|
|
&nr, nh, 0, "WNetOpenEnum");
|
|
if (ret != NO_ERROR)
|
|
{
|
|
dir->__handle = INVALID_HANDLE_VALUE;
|
|
res = geterrno_from_win_error (ret);
|
|
goto out;
|
|
}
|
|
dir->__handle = (HANDLE) nh;
|
|
}
|
|
ret = create_thread_and_wait (GET_RESOURCE_ENUM, dir->__handle,
|
|
nro = (LPNETRESOURCE) alloca (16384),
|
|
16384, "WnetEnumResource");
|
|
if (ret != NO_ERROR)
|
|
res = geterrno_from_win_error (ret);
|
|
else
|
|
{
|
|
dir->__d_position++;
|
|
char *bs = strrchr (nro->lpRemoteName, '\\');
|
|
strcpy (de->d_name, bs ? bs + 1 : nro->lpRemoteName);
|
|
if (strlen (get_name ()) == 2)
|
|
{
|
|
strlwr (de->d_name);
|
|
de->d_ino = hash_path_name (get_ino (), de->d_name);
|
|
}
|
|
else
|
|
{
|
|
de->d_ino = readdir_get_ino (nro->lpRemoteName, false);
|
|
/* We can't trust remote inode numbers of only 32 bit. That means,
|
|
all remote inode numbers when running under NT4, as well as
|
|
remote NT4 NTFS, as well as shares of Samba version < 3.0. */
|
|
if (de->d_ino <= UINT_MAX)
|
|
de->d_ino = hash_path_name (0, nro->lpRemoteName);
|
|
}
|
|
de->d_type = DT_DIR;
|
|
|
|
res = 0;
|
|
}
|
|
out:
|
|
syscall_printf ("%d = readdir (%p, %p)", res, dir, de);
|
|
return res;
|
|
}
|
|
|
|
void
|
|
fhandler_netdrive::seekdir (DIR *dir, long pos)
|
|
{
|
|
rewinddir (dir);
|
|
if (pos < 0)
|
|
return;
|
|
while (dir->__d_position < pos)
|
|
if (readdir (dir, dir->__d_dirent))
|
|
break;
|
|
}
|
|
|
|
void
|
|
fhandler_netdrive::rewinddir (DIR *dir)
|
|
{
|
|
if (dir->__handle != INVALID_HANDLE_VALUE)
|
|
{
|
|
struct net_hdls *nh = (struct net_hdls *) dir->__handle;
|
|
if (nh->dom)
|
|
WNetCloseEnum (nh->dom);
|
|
if (nh->net)
|
|
WNetCloseEnum (nh->net);
|
|
cfree (nh);
|
|
}
|
|
dir->__handle = INVALID_HANDLE_VALUE;
|
|
return fhandler_virtual::rewinddir (dir);
|
|
}
|
|
|
|
int
|
|
fhandler_netdrive::closedir (DIR *dir)
|
|
{
|
|
rewinddir (dir);
|
|
return fhandler_virtual::closedir (dir);
|
|
}
|
|
|
|
int
|
|
fhandler_netdrive::open (int flags, mode_t mode)
|
|
{
|
|
int res = fhandler_virtual::open (flags, mode);
|
|
if (!res)
|
|
goto out;
|
|
|
|
nohandle (true);
|
|
|
|
if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
|
|
{
|
|
set_errno (EEXIST);
|
|
res = 0;
|
|
goto out;
|
|
}
|
|
else if (flags & O_WRONLY)
|
|
{
|
|
set_errno (EISDIR);
|
|
res = 0;
|
|
goto out;
|
|
}
|
|
|
|
res = 1;
|
|
set_flags ((flags & ~O_TEXT) | O_BINARY | O_DIROPEN);
|
|
set_open_status ();
|
|
out:
|
|
syscall_printf ("%d = fhandler_netdrive::open (%p, %d)", res, flags, mode);
|
|
return res;
|
|
}
|
|
|