| /* |
| * Dynamic devices support |
| * |
| * Copyright 2006 Alexandre Julliard |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| #include "config.h" |
| #include "wine/port.h" |
| |
| #include <assert.h> |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <sys/time.h> |
| |
| #include "windef.h" |
| #include "winbase.h" |
| #include "winreg.h" |
| #include "winuser.h" |
| #include "dbt.h" |
| |
| #include "wine/library.h" |
| #include "wine/list.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(explorer); |
| |
| struct dos_drive |
| { |
| struct list entry; |
| char *udi; |
| int drive; |
| }; |
| |
| static struct list drives_list = LIST_INIT(drives_list); |
| |
| static char *get_dosdevices_path(void) |
| { |
| const char *config_dir = wine_get_config_dir(); |
| size_t len = strlen(config_dir) + sizeof("/dosdevices/a::"); |
| char *path = HeapAlloc( GetProcessHeap(), 0, len ); |
| if (path) |
| { |
| strcpy( path, config_dir ); |
| strcat( path, "/dosdevices/a::" ); |
| } |
| return path; |
| } |
| |
| /* send notification about a change to a given drive */ |
| static void send_notify( int drive, int code ) |
| { |
| DWORD_PTR result; |
| DEV_BROADCAST_VOLUME info; |
| |
| info.dbcv_size = sizeof(info); |
| info.dbcv_devicetype = DBT_DEVTYP_VOLUME; |
| info.dbcv_reserved = 0; |
| info.dbcv_unitmask = 1 << drive; |
| info.dbcv_flags = DBTF_MEDIA; |
| SendMessageTimeoutW( HWND_BROADCAST, WM_DEVICECHANGE, code, (LPARAM)&info, |
| SMTO_ABORTIFHUNG, 0, &result ); |
| } |
| |
| static inline int is_valid_device( struct stat *st ) |
| { |
| #if defined(linux) || defined(__sun__) |
| return S_ISBLK( st->st_mode ); |
| #else |
| /* disks are char devices on *BSD */ |
| return S_ISCHR( st->st_mode ); |
| #endif |
| } |
| |
| /* find or create a DOS drive for the corresponding device */ |
| static int add_drive( const char *device, const char *type ) |
| { |
| char *path, *p; |
| char in_use[26]; |
| struct stat dev_st, drive_st; |
| int drive, first, last, avail = 0; |
| |
| if (stat( device, &dev_st ) == -1 || !is_valid_device( &dev_st )) return -1; |
| |
| if (!(path = get_dosdevices_path())) return -1; |
| p = path + strlen(path) - 3; |
| |
| memset( in_use, 0, sizeof(in_use) ); |
| |
| first = 2; |
| last = 26; |
| if (type && !strcmp( type, "floppy" )) |
| { |
| first = 0; |
| last = 2; |
| } |
| |
| while (avail != -1) |
| { |
| avail = -1; |
| for (drive = first; drive < last; drive++) |
| { |
| if (in_use[drive]) continue; /* already checked */ |
| *p = 'a' + drive; |
| if (stat( path, &drive_st ) == -1) |
| { |
| if (lstat( path, &drive_st ) == -1 && errno == ENOENT) /* this is a candidate */ |
| { |
| if (avail == -1) |
| { |
| p[2] = 0; |
| /* if mount point symlink doesn't exist either, it's available */ |
| if (lstat( path, &drive_st ) == -1 && errno == ENOENT) avail = drive; |
| p[2] = ':'; |
| } |
| } |
| else in_use[drive] = 1; |
| } |
| else |
| { |
| in_use[drive] = 1; |
| if (!is_valid_device( &drive_st )) continue; |
| if (dev_st.st_rdev == drive_st.st_rdev) goto done; |
| } |
| } |
| if (avail != -1) |
| { |
| /* try to use the one we found */ |
| drive = avail; |
| *p = 'a' + drive; |
| if (symlink( device, path ) != -1) goto done; |
| /* failed, retry the search */ |
| } |
| } |
| drive = -1; |
| |
| done: |
| HeapFree( GetProcessHeap(), 0, path ); |
| return drive; |
| } |
| |
| static BOOL set_mount_point( struct dos_drive *drive, const char *mount_point ) |
| { |
| char *path, *p; |
| struct stat path_st, mnt_st; |
| BOOL modified = FALSE; |
| |
| if (drive->drive == -1) return FALSE; |
| if (!(path = get_dosdevices_path())) return FALSE; |
| p = path + strlen(path) - 3; |
| *p = 'a' + drive->drive; |
| p[2] = 0; |
| |
| if (mount_point[0]) |
| { |
| /* try to avoid unlinking if already set correctly */ |
| if (stat( path, &path_st ) == -1 || stat( mount_point, &mnt_st ) == -1 || |
| path_st.st_dev != mnt_st.st_dev || path_st.st_ino != mnt_st.st_ino) |
| { |
| unlink( path ); |
| symlink( mount_point, path ); |
| modified = TRUE; |
| } |
| } |
| else |
| { |
| if (unlink( path ) != -1) modified = TRUE; |
| } |
| |
| HeapFree( GetProcessHeap(), 0, path ); |
| return modified; |
| } |
| |
| BOOL add_dos_device( const char *udi, const char *device, |
| const char *mount_point, const char *type ) |
| { |
| struct dos_drive *drive; |
| |
| /* first check if it already exists */ |
| LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry ) |
| { |
| if (!strcmp( udi, drive->udi )) goto found; |
| } |
| |
| if (!(drive = HeapAlloc( GetProcessHeap(), 0, sizeof(*drive) ))) return FALSE; |
| if (!(drive->udi = HeapAlloc( GetProcessHeap(), 0, strlen(udi)+1 ))) |
| { |
| HeapFree( GetProcessHeap(), 0, drive ); |
| return FALSE; |
| } |
| strcpy( drive->udi, udi ); |
| list_add_tail( &drives_list, &drive->entry ); |
| |
| found: |
| drive->drive = add_drive( device, type ); |
| if (drive->drive != -1) |
| { |
| HKEY hkey; |
| |
| set_mount_point( drive, mount_point ); |
| |
| WINE_TRACE( "added device %c: udi %s for %s on %s type %s\n", |
| 'a' + drive->drive, wine_dbgstr_a(udi), wine_dbgstr_a(device), |
| wine_dbgstr_a(mount_point), wine_dbgstr_a(type) ); |
| |
| /* hack: force the drive type in the registry */ |
| if (!RegCreateKeyA( HKEY_LOCAL_MACHINE, "Software\\Wine\\Drives", &hkey )) |
| { |
| char name[3] = "a:"; |
| name[0] += drive->drive; |
| if (!type || strcmp( type, "cdrom" )) type = "floppy"; /* FIXME: default to floppy */ |
| RegSetValueExA( hkey, name, 0, REG_SZ, (const BYTE *)type, strlen(type) + 1 ); |
| RegCloseKey( hkey ); |
| } |
| |
| send_notify( drive->drive, DBT_DEVICEARRIVAL ); |
| } |
| return TRUE; |
| } |
| |
| BOOL remove_dos_device( const char *udi ) |
| { |
| HKEY hkey; |
| struct dos_drive *drive; |
| |
| LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry ) |
| { |
| if (strcmp( udi, drive->udi )) continue; |
| |
| if (drive->drive != -1) |
| { |
| BOOL modified = set_mount_point( drive, "" ); |
| |
| /* clear the registry key too */ |
| if (!RegOpenKeyA( HKEY_LOCAL_MACHINE, "Software\\Wine\\Drives", &hkey )) |
| { |
| char name[3] = "a:"; |
| name[0] += drive->drive; |
| RegDeleteValueA( hkey, name ); |
| RegCloseKey( hkey ); |
| } |
| |
| if (modified) send_notify( drive->drive, DBT_DEVICEREMOVECOMPLETE ); |
| } |
| |
| list_remove( &drive->entry ); |
| HeapFree( GetProcessHeap(), 0, drive->udi ); |
| HeapFree( GetProcessHeap(), 0, drive ); |
| return TRUE; |
| } |
| return FALSE; |
| } |
