2 * Dynamic devices support
4 * Copyright 2006 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
36 #include "wine/library.h"
37 #include "wine/list.h"
38 #include "wine/debug.h"
40 WINE_DEFAULT_DEBUG_CHANNEL(explorer);
49 static struct list drives_list = LIST_INIT(drives_list);
51 static char *get_dosdevices_path(void)
53 const char *config_dir = wine_get_config_dir();
54 size_t len = strlen(config_dir) + sizeof("/dosdevices/a::");
55 char *path = HeapAlloc( GetProcessHeap(), 0, len );
58 strcpy( path, config_dir );
59 strcat( path, "/dosdevices/a::" );
64 /* send notification about a change to a given drive */
65 static void send_notify( int drive, int code )
68 DEV_BROADCAST_VOLUME info;
70 info.dbcv_size = sizeof(info);
71 info.dbcv_devicetype = DBT_DEVTYP_VOLUME;
72 info.dbcv_reserved = 0;
73 info.dbcv_unitmask = 1 << drive;
74 info.dbcv_flags = DBTF_MEDIA;
75 SendMessageTimeoutW( HWND_BROADCAST, WM_DEVICECHANGE, code, (LPARAM)&info,
76 SMTO_ABORTIFHUNG, 0, &result );
79 static inline int is_valid_device( struct stat *st )
81 #if defined(linux) || defined(__sun__)
82 return S_ISBLK( st->st_mode );
84 /* disks are char devices on *BSD */
85 return S_ISCHR( st->st_mode );
89 /* find or create a DOS drive for the corresponding device */
90 static int add_drive( const char *device, const char *type )
94 struct stat dev_st, drive_st;
95 int drive, first, last, avail = 0;
97 if (stat( device, &dev_st ) == -1 || !is_valid_device( &dev_st )) return -1;
99 if (!(path = get_dosdevices_path())) return -1;
100 p = path + strlen(path) - 3;
102 memset( in_use, 0, sizeof(in_use) );
106 if (type && !strcmp( type, "floppy" ))
115 for (drive = first; drive < last; drive++)
117 if (in_use[drive]) continue; /* already checked */
119 if (stat( path, &drive_st ) == -1)
121 if (lstat( path, &drive_st ) == -1 && errno == ENOENT) /* this is a candidate */
126 /* if mount point symlink doesn't exist either, it's available */
127 if (lstat( path, &drive_st ) == -1 && errno == ENOENT) avail = drive;
131 else in_use[drive] = 1;
136 if (!is_valid_device( &drive_st )) continue;
137 if (dev_st.st_rdev == drive_st.st_rdev) goto done;
142 /* try to use the one we found */
145 if (symlink( device, path ) != -1) goto done;
146 /* failed, retry the search */
152 HeapFree( GetProcessHeap(), 0, path );
156 static BOOL set_mount_point( struct dos_drive *drive, const char *mount_point )
159 struct stat path_st, mnt_st;
160 BOOL modified = FALSE;
162 if (drive->drive == -1) return FALSE;
163 if (!(path = get_dosdevices_path())) return FALSE;
164 p = path + strlen(path) - 3;
165 *p = 'a' + drive->drive;
170 /* try to avoid unlinking if already set correctly */
171 if (stat( path, &path_st ) == -1 || stat( mount_point, &mnt_st ) == -1 ||
172 path_st.st_dev != mnt_st.st_dev || path_st.st_ino != mnt_st.st_ino)
175 symlink( mount_point, path );
181 if (unlink( path ) != -1) modified = TRUE;
184 HeapFree( GetProcessHeap(), 0, path );
188 BOOL add_dos_device( const char *udi, const char *device,
189 const char *mount_point, const char *type )
191 struct dos_drive *drive;
193 /* first check if it already exists */
194 LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
196 if (!strcmp( udi, drive->udi )) goto found;
199 if (!(drive = HeapAlloc( GetProcessHeap(), 0, sizeof(*drive) ))) return FALSE;
200 if (!(drive->udi = HeapAlloc( GetProcessHeap(), 0, strlen(udi)+1 )))
202 HeapFree( GetProcessHeap(), 0, drive );
205 strcpy( drive->udi, udi );
206 list_add_tail( &drives_list, &drive->entry );
209 drive->drive = add_drive( device, type );
210 if (drive->drive != -1)
214 set_mount_point( drive, mount_point );
216 WINE_TRACE( "added device %c: udi %s for %s on %s type %s\n",
217 'a' + drive->drive, wine_dbgstr_a(udi), wine_dbgstr_a(device),
218 wine_dbgstr_a(mount_point), wine_dbgstr_a(type) );
220 /* hack: force the drive type in the registry */
221 if (!RegCreateKeyA( HKEY_LOCAL_MACHINE, "Software\\Wine\\Drives", &hkey ))
224 name[0] += drive->drive;
225 if (!type || strcmp( type, "cdrom" )) type = "floppy"; /* FIXME: default to floppy */
226 RegSetValueExA( hkey, name, 0, REG_SZ, (const BYTE *)type, strlen(type) + 1 );
230 send_notify( drive->drive, DBT_DEVICEARRIVAL );
235 BOOL remove_dos_device( const char *udi )
238 struct dos_drive *drive;
240 LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
242 if (strcmp( udi, drive->udi )) continue;
244 if (drive->drive != -1)
246 BOOL modified = set_mount_point( drive, "" );
248 /* clear the registry key too */
249 if (!RegOpenKeyA( HKEY_LOCAL_MACHINE, "Software\\Wine\\Drives", &hkey ))
252 name[0] += drive->drive;
253 RegDeleteValueA( hkey, name );
257 if (modified) send_notify( drive->drive, DBT_DEVICEREMOVECOMPLETE );
260 list_remove( &drive->entry );
261 HeapFree( GetProcessHeap(), 0, drive->udi );
262 HeapFree( GetProcessHeap(), 0, drive );