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