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tdemultimedia/kscd/libwm/plat_linux.c

804 lines
21 KiB

/*
* $Id$
*
* This file is part of WorkMan, the civilized CD player library
* (c) 1991-1997 by Steven Grimm (original author)
* (c) by Dirk Försterling (current 'author' = maintainer)
* The maintainer can be contacted by his e-mail address:
* milliByte@DeathsDoor.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*
* Linux-specific drive control routines. Very similar to the Sun module.
*/
#if defined(__linux__)
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/wait.h>
/* Try to get around bug #29274 */
#include <linux/version.h>
#if 0
/* this breaks the build on ia64 and s390 for example.
sys/types.h is already included and should provide __u64.
please tell where we really need this and let's try to find
a working #if case for everyone ... adrian@suse.de */
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,50)) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,21) && LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
#undef __GNUC__
typedef unsigned long long __u64;
#endif
#endif
#include "include/wm_config.h"
#include "include/wm_struct.h"
#include "include/wm_cdtext.h"
#if defined(BSD_MOUNTTEST)
#include <mntent.h>
#else
/*
* this is for glibc 2.x which defines ust structure in
* ustat.h not stat.h
*/
#ifdef __GLIBC__
#include <sys/ustat.h>
#endif
#endif
#include <sys/time.h>
#include <sys/ioctl.h>
#ifndef __GNUC__
#define __GNUC__ 1
#endif
/* needed for vanilla kernel headers, which do provide __u64 only
for ansi */
#undef __STRICT_ANSI__
/* needed for non-ansi kernel headers */
#define asm __asm__
#define inline __inline__
#include <asm/types.h>
#include <linux/cdrom.h>
#undef asm
#undef inline
#include "include/wm_cdda.h"
#include "include/wm_struct.h"
#include "include/wm_platform.h"
#include "include/wm_cdrom.h"
#include "include/wm_scsi.h"
#include "include/wm_helpers.h"
#ifdef OSS_SUPPORT
#include <linux/soundcard.h>
#define CD_CHANNEL SOUND_MIXER_CD
#endif
#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
#define max(a,b) ((a) > (b) ? (a) : (b))
#ifdef LINUX_SCSI_PASSTHROUGH
/* this is from <scsi/scsi_ioctl.h> */
# define SCSI_IOCTL_SEND_COMMAND 1
#endif
#ifdef BUILD_CDDA
int gen_cdda_init( struct wm_drive *d );
#endif
int min_volume = 0;
int max_volume = 255;
#ifdef OSS_SUPPORT
int mixer;
char mixer_dev_name[20] = "/dev/mixer";
#endif
/*-------------------------------------------------------*
*
*
* CD-ROM drive functions.
*
*
*-------------------------------------------------------*/
/*--------------------------------------------------------*
* Initialize the drive. A no-op for the generic driver.
*--------------------------------------------------------*/
int
gen_init( struct wm_drive *d )
{
return (0);
} /* gen_init() */
/*---------------------------------------------------------------------------*
* Open the CD device and figure out what kind of drive is attached.
*---------------------------------------------------------------------------*/
int
wmcd_open( struct wm_drive *d )
{
int fd;
char vendor[32], model[32], rev[32];
if (d->cd_device == NULL)
d->cd_device = DEFAULT_CD_DEVICE;
if (d->fd >= 0) { /* Device already open? */
/* wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): [device is open (fd=%d)]\n", d->fd);*/
return (0);
}
fd = open(d->cd_device, O_RDONLY | O_NONBLOCK);
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): device=%s fd=%d\n", d->cd_device, fd);
if (fd < 0)
return -errno;
/* Now fill in the relevant parts of the wm_drive structure. */
d->fd = fd;
/*
* See if we can do digital audio.
*/
#if defined(BUILD_CDDA)
if(d->cdda && gen_cdda_init(d)) {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): failed in gen_cdda_init\n");
gen_close(d);
return -1;
}
#endif
/* Can we figure out the drive type? */
if (wm_scsi_get_drive_type(d, vendor, model, rev)) {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): inquiry failed\n");
strcpy(vendor, "Generic");
strcpy(model, "drive type");
strcpy(rev, "");
}
if(find_drive_struct(vendor, model, rev) < 0) {
gen_close(d);
return -1;
}
if(d->proto->gen_init)
return (d->proto->gen_init)(d);
return 0;
} /* wmcd_open() */
/*
* Re-Open the device if it is open.
*/
int
wmcd_reopen( struct wm_drive *d )
{
int status;
int tries = 0;
do {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen\n");
gen_close(d);
wm_susleep( 1000 );
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "calls wmcd_open()\n");
status = wmcd_open( d ); /* open it as usual */
wm_susleep( 1000 );
tries++;
} while ( (status != 0) && (tries < 10) );
return status;
} /* wmcd_reopen() */
/*---------------------------------------------*
* Send an arbitrary SCSI command to a device.
*---------------------------------------------*/
int
wm_scsi( struct wm_drive *d, unsigned char *cdb, int cdblen,
void *retbuf, int retbuflen, int getreply )
{
#ifdef LINUX_SCSI_PASSTHROUGH
char *cmd;
int cmdsize;
cmdsize = 2 * sizeof(int);
if (retbuf)
{
if (getreply) cmdsize += max(cdblen, retbuflen);
else cmdsize += (cdblen + retbuflen);
}
else cmdsize += cdblen;
cmd = malloc(cmdsize);
if (cmd == NULL)
return (-1);
((int*)cmd)[0] = cdblen + ((retbuf && !getreply) ? retbuflen : 0);
((int*)cmd)[1] = ((retbuf && getreply) ? retbuflen : 0);
memcpy(cmd + 2*sizeof(int), cdb, cdblen);
if (retbuf && !getreply)
memcpy(cmd + 2*sizeof(int) + cdblen, retbuf, retbuflen);
if (ioctl(d->fd, SCSI_IOCTL_SEND_COMMAND, cmd))
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%s: ioctl() failure\n", __FILE__);
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "command buffer is:\n");
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%02x %02x %02x %02x %02x %02x\n",
cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5]);
free(cmd);
return (-1);
}
if (retbuf && getreply)
memcpy(retbuf, cmd + 2*sizeof(int), retbuflen);
free(cmd);
return 0;
#else /* Linux SCSI passthrough*/
/*----------------------------------------*
* send packet over cdrom interface
* kernel >= 2.2.16
*----------------------------------------*/
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,2,15))
struct cdrom_generic_command cdc;
struct request_sense sense;
int capability;
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wm_scsi over CDROM_SEND_PACKET entered\n");
capability = ioctl(d->fd, CDROM_GET_CAPABILITY);
if(!(capability & CDC_GENERIC_PACKET))
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "your CDROM or/and kernel don't support CDC_GENERIC_PACKET ...\n");
return -1;
}
memset(&cdc, 0, sizeof(struct cdrom_generic_command));
memset(&sense, 0, sizeof(struct request_sense));
memcpy(cdc.cmd, cdb, cdblen);
cdc.buffer = retbuf;
cdc.buflen = retbuflen;
cdc.stat = 0;
cdc.sense = &sense;
cdc.data_direction = getreply?CGC_DATA_READ:CGC_DATA_WRITE;
/* sendpacket_over_cdrom_interface() */
return ioctl(d->fd, CDROM_SEND_PACKET, &cdc);
#endif /* CDROM_SEND_PACKET */
printf("ERROR: this binary was compiled without CDROM GENERIC PACKET SUPPORT. kernel version < 2.2.16?\n");
printf("ERROR: if you have a SCSI CDROM, rebuild it with a #define LINUX_SCSI_PASSTHROUGH\n");
return (-1);
#endif
} /* wm_scsi */
int
gen_close( struct wm_drive *d )
{
if(d->fd != -1) {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "closing the device\n");
close(d->fd);
d->fd = -1;
}
return 0;
}
/*--------------------------------*
* Keep the CD open all the time.
* disabled, analogous to 1.4b3
*--------------------------------*
void
keep_cd_open( void )
{
int fd;
struct flock fl;
extern end;
for (fd = 0; fd < 256; fd++)
close(fd);
if (fork())
exit(0);
#if defined(O_NOFOLLOW)
if ((fd = open("/tmp/cd.lock", O_RDWR | O_CREAT | O_NOFOLLOW, 0666)) < 0)
#else
if ((fd = open("/tmp/cd.lock", O_RDWR | O_CREAT, 0666)) < 0)
#endif
exit(0);
fl.l_type = F_WRLCK;
fl.l_whence = 0;
fl.l_start = 0;
fl.l_len = 0;
if (fcntl(fd, F_SETLK, &fl) < 0)
exit(0);
if (open(cd_device, 0) >= 0)
{
brk(&end);
pause();
}
exit(0);
}
*/
/*--------------------------------------------------------------------------*
* Get the current status of the drive: the current play mode, the absolute
* position from start of disc (in frames), and the current track and index
* numbers if the CD is playing or paused.
*--------------------------------------------------------------------------*/
int
gen_get_drive_status( struct wm_drive *d, int oldmode,
int *mode, int *pos, int *track, int *ind )
{
struct cdrom_subchnl sc;
int ret;
#ifdef SBPCD_HACK
static int prevpos = 0;
#endif
/* Is the device open? */
if (d->fd < 0) {
ret = wmcd_open(d);
if(ret < 0) /* error */
return ret;
if(ret == 1) {
/* retry */
*mode = WM_CDM_UNKNOWN;
return 0;
}
}
/* Try to get rid of the door locking */
/* Don't care about return value. If it */
/* works - fine. If not - ... */
ioctl(d->fd, CDROM_LOCKDOOR, 0);
*mode = WM_CDM_UNKNOWN;
sc.cdsc_format = CDROM_MSF;
#if defined(BUILD_CDDA)
IFCDDA(d) {
if(!cdda_get_drive_status(d, oldmode, mode, pos, track, ind)) {
if(*mode == WM_CDM_STOPPED)
*mode = WM_CDM_UNKNOWN; /* dont believe */
}
} else
#endif
if(!ioctl(d->fd, CDROMSUBCHNL, &sc)) {
switch (sc.cdsc_audiostatus) {
case CDROM_AUDIO_PLAY:
*mode = WM_CDM_PLAYING;
*track = sc.cdsc_trk;
*ind = sc.cdsc_ind;
*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
sc.cdsc_absaddr.msf.second * 75 +
sc.cdsc_absaddr.msf.frame;
#ifdef SBPCD_HACK
if( *pos < prevpos ) {
if( (prevpos - *pos) < 75 ) {
*mode = WM_CDM_TRACK_DONE;
}
}
prevpos = *pos;
#endif
break;
case CDROM_AUDIO_PAUSED:
if (oldmode == WM_CDM_PLAYING || oldmode == WM_CDM_PAUSED) {
*mode = WM_CDM_PAUSED;
*track = sc.cdsc_trk;
*ind = sc.cdsc_ind;
*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
sc.cdsc_absaddr.msf.second * 75 +
sc.cdsc_absaddr.msf.frame;
} else
*mode = WM_CDM_STOPPED;
break;
case CDROM_AUDIO_NO_STATUS:
*mode = WM_CDM_STOPPED;
break;
case CDROM_AUDIO_COMPLETED:
*mode = WM_CDM_TRACK_DONE; /* waiting for next track. */
break;
case CDROM_AUDIO_INVALID: /**/
default:
*mode = WM_CDM_UNKNOWN;
break;
}
}
if(WM_CDS_NO_DISC(*mode)) {
/* verify status of drive */
ret = ioctl(d->fd, CDROM_DRIVE_STATUS, 0/* slot */);
if(ret == CDS_DISC_OK)
ret = ioctl(d->fd, CDROM_DISC_STATUS, 0);
switch(ret) {
case CDS_NO_DISC:
*mode = WM_CDM_NO_DISC;
break;
case CDS_TRAY_OPEN:
*mode = WM_CDM_EJECTED;
break;
case CDS_AUDIO:
case CDS_MIXED:
*mode = WM_CDM_STOPPED;
break;
case CDS_DRIVE_NOT_READY:
case CDS_NO_INFO:
case CDS_DATA_1:
case CDS_DATA_2:
case CDS_XA_2_1:
case CDS_XA_2_2:
default:
*mode = WM_CDM_UNKNOWN;
}
}
return (0);
} /* gen_get_drive_status */
/*-------------------------------------*
* Get the number of tracks on the CD.
*-------------------------------------*/
int
gen_get_trackcount(struct wm_drive *d, int *tracks)
{
struct cdrom_tochdr hdr;
if (ioctl(d->fd, CDROMREADTOCHDR, &hdr))
return (-1);
*tracks = hdr.cdth_trk1;
return (0);
} /* gen_get_trackcount() */
/*---------------------------------------------------------*
* Get the start time and mode (data or audio) of a track.
*---------------------------------------------------------*/
int
gen_get_trackinfo(struct wm_drive *d, int track, int *data, int *startframe)
{
struct cdrom_tocentry entry;
entry.cdte_track = track;
entry.cdte_format = CDROM_MSF;
if (ioctl(d->fd, CDROMREADTOCENTRY, &entry))
return (-1);
*startframe = entry.cdte_addr.msf.minute * 60 * 75 +
entry.cdte_addr.msf.second * 75 +
entry.cdte_addr.msf.frame;
*data = entry.cdte_ctrl & CDROM_DATA_TRACK ? 1 : 0;
return (0);
}
/*-------------------------------------*
* Get the number of frames on the CD.
*-------------------------------------*/
int
gen_get_cdlen(struct wm_drive *d, int *frames)
{
int tmp;
return gen_get_trackinfo( d, CDROM_LEADOUT, &tmp, frames);
} /* gen_get_cdlen() */
/*------------------------------------------------------------*
* Play the CD from one position to another (both in frames.)
*------------------------------------------------------------*/
int
gen_play(struct wm_drive *d, int start, int end, int realstart)
{
struct cdrom_msf msf;
CDDARETURN(d) cdda_play(d, start, end, realstart);
msf.cdmsf_min0 = start / (60*75);
msf.cdmsf_sec0 = (start % (60*75)) / 75;
msf.cdmsf_frame0 = start % 75;
msf.cdmsf_min1 = end / (60*75);
msf.cdmsf_sec1 = (end % (60*75)) / 75;
msf.cdmsf_frame1 = end % 75;
if (ioctl(d->fd, CDROMPLAYMSF, &msf)) {
if (ioctl(d->fd, CDROMSTART))
return (-1);
if (ioctl(d->fd, CDROMPLAYMSF, &msf))
return (-2);
}
/*
* I hope no drive gets really confused after CDROMSTART
* If so, I need to make this run-time configurable.
*
#ifndef FAST_IDE
if (ioctl( d->fd, CDROMSTART))
return (-1);
#endif
if (ioctl( d->fd, CDROMPLAYMSF, &msf ))
return (-2);
*/
return (0);
} /* gen_play() */
/*---------------*
* Pause the CD.
*---------------*/
int
gen_pause(struct wm_drive *d)
{
CDDARETURN(d) cdda_pause(d);
return (ioctl(d->fd, CDROMPAUSE));
}
/*-------------------------------------------------*
* Resume playing the CD (assuming it was paused.)
*-------------------------------------------------*/
int
gen_resume(struct wm_drive *d)
{
CDDARETURN(d) cdda_pause(d);
return (ioctl(d->fd, CDROMRESUME));
}
/*--------------*
* Stop the CD.
*--------------*/
int
gen_stop(struct wm_drive *d)
{
CDDARETURN(d) cdda_stop(d);
return (ioctl(d->fd, CDROMSTOP));
}
/*----------------------------------------*
* Eject the current CD, if there is one.
*----------------------------------------*/
int
gen_eject(struct wm_drive *d)
{
struct stat stbuf;
#if !defined(BSD_MOUNTTEST)
struct ustat ust;
#else
struct mntent *mnt;
FILE *fp;
#endif
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "ejecting?\n");
if (fstat(d->fd, &stbuf) != 0) {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "that weird fstat() thingy\n");
return (-2);
}
/* Is this a mounted filesystem? */
#if !defined(BSD_MOUNTTEST)
if (ustat(stbuf.st_rdev, &ust) == 0)
return (-3);
#else
/*
* This is the same test as in the WorkBone interface.
* I should eliminate it there, because there is no need
* for it in the UI
*/
/* check if drive is mounted (from Mark Buckaway's cdplayer code) */
/* Changed it again (look at XPLAYCD from ???? */
/* It's better to check the device name rather than one device is */
/* mounted as iso9660. That prevents "no playing" if you have more*/
/* than one CD-ROM, and one of them is mounted, but it's not the */
/* audio CD -dirk */
if ((fp = setmntent (MOUNTED, "r")) == NULL)
{
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "Could not open %s: %s\n", MOUNTED, strerror (errno));
return(-3);
}
while ((mnt = getmntent (fp)) != NULL)
{
if (strcmp (mnt->mnt_fsname, d->cd_device) == 0)
{
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "CDROM already mounted (according to mtab). Operation aborted.\n");
endmntent (fp);
return(-3);
}
}
endmntent (fp);
#endif /* BSD_MOUNTTEST */
IFCDDA(d) {
cdda_eject(d);
}
ioctl( d->fd, CDROM_LOCKDOOR, 0 );
if (ioctl(d->fd, CDROMEJECT))
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "eject failed (%s).\n", strerror(errno));
return (-1);
}
/*------------------
* Things in "foobar_one" are left over from 1.4b3
* I put them here for further observation. In 1.4b3, however,
* that workaround didn't help at least for /dev/sbpcd
* (The tray closed just after ejecting because re-opening the
* device causes the tray to close)
*------------------*/
#ifdef foobar_one
extern int intermittent_dev
/*
* Some drives (drivers?) won't recognize a new CD if we leave the
* device open.
*/
if (intermittent_dev)
gen_close(d);
#endif
return (0);
} /* gen_eject() */
/*----------------------------------------*
* Close the CD tray
*----------------------------------------*/
int
gen_closetray(struct wm_drive *d)
{
#ifdef CAN_CLOSE
#ifdef CDROMCLOSETRAY
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "CDROMCLOSETRAY closing tray...\n");
if (ioctl(d->fd, CDROMCLOSETRAY))
return (-1);
#else
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen() closing tray...\n");
if(!gen_close(d))
{
return(wmcd_reopen(d));
} else {
return(-1);
}
#endif /* CDROMCLOSETRAY */
#endif /* CAN_CLOSE */
/* Always succeed if the drive can't close. */
return(0);
} /* gen_closetray() */
/*------------------------------------------------------------------------*
* scale_volume(vol, max)
*
* Return a volume value suitable for passing to the CD-ROM drive. "vol"
* is a volume slider setting; "max" is the slider's maximum value.
* This is not used if sound card support is enabled.
*
*------------------------------------------------------------------------*/
static int
scale_volume( int vol, int max )
{
#ifdef CURVED_VOLUME
return ((max * max - (max - vol) * (max - vol)) *
(max_volume - min_volume) / (max * max) + min_volume);
#else
return ((vol * (max_volume - min_volume)) / max + min_volume);
#endif
} /* scale_volume() */
static int
unscale_volume( int vol, int max )
{
#ifdef CURVED_VOLUME
/* FIXME do it simpler */
int tmp = (((max_volume - min_volume - vol) * max * max) - (vol + min_volume));
return max - sqrt((tmp/(max_volume - min_volume)));
#else
return (((vol - min_volume) * max) / (max_volume - min_volume));
#endif
} /* unscale_volume() */
/*---------------------------------------------------------------------*
* Set the volume level for the left and right channels. Their values
* range from 0 to 100.
*---------------------------------------------------------------------*/
int
gen_set_volume( struct wm_drive *d, int left, int right )
{
struct cdrom_volctrl v;
CDDARETURN(d) cdda_set_volume(d, left, right);
/* Adjust the volume to make up for the CD-ROM drive's weirdness. */
left = scale_volume(left, 100);
right = scale_volume(right, 100);
v.channel0 = v.channel2 = left < 0 ? 0 : left > 255 ? 255 : left;
v.channel1 = v.channel3 = right < 0 ? 0 : right > 255 ? 255 : right;
return (ioctl(d->fd, CDROMVOLCTRL, &v));
} /* gen_set_volume() */
/*---------------------------------------------------------------------*
* Read the volume from the drive, if available. Each channel
* ranges from 0 to 100, with -1 indicating data not available.
*---------------------------------------------------------------------*/
int
gen_get_volume( struct wm_drive *d, int *left, int *right )
{
struct cdrom_volctrl v;
CDDARETURN(d) cdda_get_volume(d, left, right);
#if defined(CDROMVOLREAD)
if(!ioctl(d->fd, CDROMVOLREAD, &v)) {
*left = unscale_volume((v.channel0 + v.channel2)/2, 100);
*right = unscale_volume((v.channel1 + v.channel3)/2, 100);
} else
#endif
/* Suns, HPs, Linux, NEWS can't read the volume; oh well */
*left = *right = -1;
return 0;
} /* gen_get_volume() */
/*------------------------------------------------------------------------*
* gen_get_cdtext(drive, buffer, length)
*
* Return a buffer with cdtext-stream. buffer will be allocated and filled
*
* needs send packet interface -> for IDE, linux at 2.2.16
* depends on scsi.c which depends on wm_scsi defined in here
* (which also takes care of IDE drives)
*------------------------------------------------------------------------*/
int
gen_get_cdtext(struct wm_drive *d, unsigned char **pp_buffer, int *p_buffer_length)
{
return wm_scsi_get_cdtext(d, pp_buffer, p_buffer_length);
} /* gen_get_cdtext() */
#endif /* __linux__ */