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intf_eject.c
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2003-04-07
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/*****************************************************************************
* intf_eject.c: CD/DVD-ROM ejection handling functions
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: intf_eject.c,v 1.20 2003/03/24 17:15:30 gbazin Exp $
*
* Author: Julien Blache <jb@technologeek.org> for the Linux part
* with code taken from the Linux "eject" command
* Jon Lech Johansen <jon-vl@nanocrew.net> for Darwin
* Gildas Bazin <gbazin@netcourrier.com> for Win32
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#include <vlc/vlc.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#ifdef HAVE_DVD_H
# include <dvd.h>
#endif
#if defined(SYS_LINUX) && defined(HAVE_LINUX_VERSION_H)
# include <linux/version.h>
/* handy macro found in 2.1 kernels, but not in older ones */
# ifndef KERNEL_VERSION
# define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
# endif
# include <sys/types.h>
# include <sys/stat.h>
# include <sys/ioctl.h>
# include <sys/ioctl.h>
# include <sys/mount.h>
# include <linux/cdrom.h>
# if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
# include <linux/ucdrom.h>
# endif
# include <scsi/scsi.h>
# include <scsi/sg.h>
# include <scsi/scsi_ioctl.h>
#endif
#if defined( WIN32 ) && !defined( UNDER_CE )
# include <mmsystem.h>
#endif
/*****************************************************************************
* Local prototypes
*****************************************************************************/
#if defined(SYS_LINUX) && defined(HAVE_LINUX_VERSION_H)
static int EjectSCSI ( int i_fd );
#endif
/*****************************************************************************
* intf_Eject: eject the CDRom
*****************************************************************************
* returns 0 on success
* returns 1 on failure
* returns -1 if not implemented
*****************************************************************************/
int __intf_Eject( vlc_object_t *p_this, const char *psz_device )
{
int i_ret = VLC_SUCCESS;
#ifdef SYS_DARWIN
FILE *p_eject;
char *psz_disk;
char sz_cmd[32];
/*
* The only way to cleanly unmount the disc under MacOS X
* is to use the 'disktool' command line utility. It uses
* the non-public Disk Arbitration API, which can not be
* used by Cocoa or Carbon applications.
*/
if( ( psz_disk = (char *)strstr( psz_device, "disk" ) ) != NULL &&
strlen( psz_disk ) > 4 )
{
#define EJECT_CMD "/usr/sbin/disktool -e %s 0"
snprintf( sz_cmd, sizeof(sz_cmd), EJECT_CMD, psz_disk );
#undef EJECT_CMD
if( ( p_eject = popen( sz_cmd, "r" ) ) != NULL )
{
char psz_result[0x200];
i_ret = fread( psz_result, 1, sizeof(psz_result) - 1, p_eject );
if( i_ret == 0 && ferror( p_eject ) != 0 )
{
pclose( p_eject );
return VLC_EGENERIC;
}
pclose( p_eject );
psz_result[ i_ret ] = 0;
if( strstr( psz_result, "Disk Ejected" ) != NULL )
{
return VLC_SUCCESS;
}
}
}
return VLC_EGENERIC;
#elif defined(UNDER_CE)
msg_Warn( p_this, "CD-Rom ejection unsupported on this platform" );
return i_ret;
#elif defined(WIN32)
MCI_OPEN_PARMS op;
MCI_STATUS_PARMS st;
DWORD i_flags;
char psz_drive[4];
memset( &op, 0, sizeof(MCI_OPEN_PARMS) );
op.lpstrDeviceType = (LPCSTR)MCI_DEVTYPE_CD_AUDIO;
strcpy( psz_drive, "X:" );
psz_drive[0] = psz_device[0];
op.lpstrElementName = psz_drive;
/* Set the flags for the device type */
i_flags = MCI_OPEN_TYPE | MCI_OPEN_TYPE_ID |
MCI_OPEN_ELEMENT | MCI_OPEN_SHAREABLE;
if( !mciSendCommand( 0, MCI_OPEN, i_flags, (unsigned long)&op ) )
{
st.dwItem = MCI_STATUS_READY;
/* Eject disc */
i_ret = mciSendCommand( op.wDeviceID, MCI_SET, MCI_SET_DOOR_OPEN, 0 );
/* Release access to the device */
mciSendCommand( op.wDeviceID, MCI_CLOSE, MCI_WAIT, 0 );
}
else i_ret = VLC_EGENERIC;
return i_ret;
#else /* WIN32 */
int i_fd;
/* This code could be extended to support CD/DVD-ROM chargers */
i_fd = open( psz_device, O_RDONLY | O_NONBLOCK );
if( i_fd == -1 )
{
msg_Err( p_this, "could not open device %s", psz_device );
return VLC_EGENERIC;
}
#if defined(SYS_LINUX) && defined(HAVE_LINUX_VERSION_H)
/* Try a simple ATAPI eject */
i_ret = ioctl( i_fd, CDROMEJECT, 0 );
if( i_ret != 0 )
{
i_ret = EjectSCSI( i_fd );
}
if( i_ret != 0 )
{
msg_Err( p_this, "could not eject %s", psz_device );
}
#elif defined (HAVE_DVD_H)
i_ret = ioctl( i_fd, CDROMEJECT, 0 );
#else
msg_Warn( p_this, "CD-Rom ejection unsupported on this platform" );
i_ret = -1;
#endif
close( i_fd );
return i_ret;
#endif
}
/* The following functions are local */
#if defined(SYS_LINUX) && defined(HAVE_LINUX_VERSION_H)
/*****************************************************************************
* Eject using SCSI commands. Return 0 if successful
*****************************************************************************/
static int EjectSCSI( int i_fd )
{
int i_status;
struct sdata
{
int inlen;
int outlen;
char cmd[256];
} scsi_cmd;
scsi_cmd.inlen = 0;
scsi_cmd.outlen = 0;
scsi_cmd.cmd[0] = ALLOW_MEDIUM_REMOVAL;
scsi_cmd.cmd[1] = 0;
scsi_cmd.cmd[2] = 0;
scsi_cmd.cmd[3] = 0;
scsi_cmd.cmd[4] = 0;
scsi_cmd.cmd[5] = 0;
i_status = ioctl( i_fd, SCSI_IOCTL_SEND_COMMAND, (void *)&scsi_cmd );
if( i_status != 0 )
{
return VLC_EGENERIC;
}
scsi_cmd.inlen = 0;
scsi_cmd.outlen = 0;
scsi_cmd.cmd[0] = START_STOP;
scsi_cmd.cmd[1] = 0;
scsi_cmd.cmd[2] = 0;
scsi_cmd.cmd[3] = 0;
scsi_cmd.cmd[4] = 1;
scsi_cmd.cmd[5] = 0;
i_status = ioctl( i_fd, SCSI_IOCTL_SEND_COMMAND, (void *)&scsi_cmd );
if( i_status != 0 )
{
return VLC_EGENERIC;
}
scsi_cmd.inlen = 0;
scsi_cmd.outlen = 0;
scsi_cmd.cmd[0] = START_STOP;
scsi_cmd.cmd[1] = 0;
scsi_cmd.cmd[2] = 0;
scsi_cmd.cmd[3] = 0;
scsi_cmd.cmd[4] = 2;
scsi_cmd.cmd[5] = 0;
i_status = ioctl( i_fd, SCSI_IOCTL_SEND_COMMAND, (void *)&scsi_cmd );
if( i_status != 0 )
{
return VLC_EGENERIC;
}
/* Force kernel to reread partition table when new disc inserted */
i_status = ioctl( i_fd, BLKRRPART );
return i_status;
}
#endif