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mountmgr: Add a helper function to update symlinks.

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This commit is contained in:
Alexandre Julliard 2009-07-22 17:57:08 +02:00
parent 878459383a
commit e38aff419b
1 changed files with 41 additions and 32 deletions
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73
dlls/mountmgr.sys/device.c
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@ -148,6 +148,20 @@ static char *read_symlink( const char *path )
}
}
/* update a symlink if it changed; return TRUE if updated */
static void update_symlink( const char *path, const char *dest, const char *orig_dest )
{
if (dest && dest[0])
{
if (!orig_dest || strcmp( orig_dest, dest ))
{
unlink( path );
symlink( dest, path );
}
}
else unlink( path );
}
/* send notification about a change to a given drive */
static void send_notify( int drive, int code )
{
@ -517,42 +531,32 @@ done:
return drive;
}
static BOOL set_unix_mount_point( struct dos_drive *drive, const char *mount_point )
static void set_unix_mount_point( struct dos_drive *drive, const char *mount_point )
{
char *path, *p;
BOOL modified = FALSE;
struct volume *volume = drive->volume;
struct disk_device *device = volume->device;
if (!(path = get_dosdevices_path( &p ))) return FALSE;
if (!(path = get_dosdevices_path( &p ))) return;
p[0] = 'a' + drive->drive;
p[2] = 0;
update_symlink( path, mount_point, device->unix_mount );
RtlFreeHeap( GetProcessHeap(), 0, device->unix_mount );
device->unix_mount = strdupA( mount_point );
if (mount_point && mount_point[0])
{
/* try to avoid unlinking if already set correctly */
if (!device->unix_mount || strcmp( device->unix_mount, mount_point ))
{
unlink( path );
symlink( mount_point, path );
modified = TRUE;
}
RtlFreeHeap( GetProcessHeap(), 0, device->unix_mount );
device->unix_mount = strdupA( mount_point );
if (drive->mount) set_mount_point_id( drive->mount, mount_point, strlen(mount_point) + 1 );
if (volume->mount) set_mount_point_id( volume->mount, mount_point, strlen(mount_point) + 1 );
}
else
{
if (unlink( path ) != -1) modified = TRUE;
RtlFreeHeap( GetProcessHeap(), 0, device->unix_mount );
device->unix_mount = NULL;
if (drive->mount) set_mount_point_id( drive->mount, NULL, 0 );
if (volume->mount) set_mount_point_id( volume->mount, NULL, 0 );
}
HeapFree( GetProcessHeap(), 0, path );
return modified;
}
/* create devices for mapped drives */
@ -662,8 +666,7 @@ NTSTATUS add_dos_device( int letter, const char *udi, const char *device,
if (!(path = get_dosdevices_path( &p ))) return STATUS_NO_MEMORY;
*p = 'a' + letter;
unlink( path );
if (device) symlink( device, path );
update_symlink( path, device, NULL );
}
LIST_FOR_EACH_ENTRY_SAFE( drive, next, &drives_list, struct dos_drive, entry )
@ -721,31 +724,37 @@ NTSTATUS remove_dos_device( int letter, const char *udi )
{
HKEY hkey;
struct dos_drive *drive;
char *path, *p;
LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
{
if (letter != -1 && drive->drive != letter) continue;
if (udi)
{
if (!drive->volume->udi) continue;
if (strcmp( udi, drive->volume->udi )) continue;
}
else if (drive->drive != letter) continue;
if (drive->drive != -1)
if ((path = get_dosdevices_path( &p )))
{
BOOL modified = set_unix_mount_point( drive, NULL );
/* clear the registry key too */
if (!RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
{
WCHAR name[3] = {'a',':',0};
name[0] += drive->drive;
RegDeleteValueW( hkey, name );
RegCloseKey( hkey );
}
if (modified && udi) send_notify( drive->drive, DBT_DEVICEREMOVECOMPLETE );
p[0] = 'a' + drive->drive;
p[2] = 0;
unlink( path );
RtlFreeHeap( GetProcessHeap(), 0, path );
}
/* clear the registry key too */
if (!RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
{
WCHAR name[3] = {'a',':',0};
name[0] += drive->drive;
RegDeleteValueW( hkey, name );
RegCloseKey( hkey );
}
if (udi && drive->volume->device->unix_mount)
send_notify( drive->drive, DBT_DEVICEREMOVECOMPLETE );
delete_dos_device( drive );
return STATUS_SUCCESS;
}