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dockapps/ascd/libworkman/plat_svr4.c

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/*
* $Id: plat_svr4.c,v 1.7 1999/03/07 08:36:41 dirk Exp $
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* SVR4 specific. Much of this is similar to plat_hpux.c.
*/
#if defined(SVR4) && !defined(sun) && !defined(__sun__) && !defined(__sony_news)
static char plat_svr4_id[] = "$Id: plat_svr4.c,v 1.7 1999/03/07 08:36:41 dirk Exp $";
#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/mkdev.h>
#include <sys/stat.h>
#include <sys/sdi.h>
#include <sys/sdi_edt.h>
#include <sys/scsi.h>
#include <errno.h>
#include "include/wm_config.h"
#include "include/wm_struct.h"
#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
void *malloc();
char *strchr();
int min_volume = 0;
int max_volume = 255;
extern char *cd_device;
/*
* Initialize the drive. A no-op for the generic driver.
*/
int
gen_init(d)
struct wm_drive *d;
{
return (0);
}
/*
* Get the number of tracks on the CD.
*/
int
gen_get_trackcount(d, tracks)
struct wm_drive *d;
int *tracks;
{
return (wm_scsi2_get_trackcount(d, tracks));
}
/*
* Get the start time and mode (data or audio) of a track.
*/
int
gen_get_trackinfo(d, track, data, startframe)
struct wm_drive *d;
int track, *data, *startframe;
{
return (wm_scsi2_get_trackinfo(d, track, data, startframe));
}
/*
* Get the number of frames on the CD.
*/
int
gen_get_cdlen(d, frames)
struct wm_drive *d;
int *frames;
{
int tmp;
return (wm_scsi2_get_cdlen(d, frames));
}
/*
* 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(d, oldmode, mode, pos, track, index)
struct wm_drive *d;
enum wm_cd_modes oldmode, *mode;
int *pos, *track, *index;
{
return (wm_scsi2_get_drive_status(d, oldmode, mode, pos, track, index));
}
/*
* Set the volume level for the left and right channels. Their values
* range from 0 to 100.
*/
int
gen_set_volume(d, left, right)
struct wm_drive *d;
int left, right;
{
return (wm_scsi2_set_volume(d, left, right));
}
/*
* Read the initial volume from the drive, if available. Each channel
* ranges from 0 to 100, with -1 indicating data not available.
*/
int
gen_get_volume(d, left, right)
struct wm_drive *d;
int *left, *right;
{
return (wm_scsi2_get_volume(d, left, right));
}
/*
* Pause the CD.
*/
int
gen_pause(d)
struct wm_drive *d;
{
return (wm_scsi2_pause(d));
}
/*
* Resume playing the CD (assuming it was paused.)
*/
int
gen_resume(d)
struct wm_drive *d;
{
return (wm_scsi2_resume(d));
}
/*
* Stop the CD.
*/
int
gen_stop(d)
struct wm_drive *d;
{
return (wm_scsi2_stop(d));
}
/*
* Play the CD from one position to another (both in frames.)
*/
int
gen_play(d, start, end)
struct wm_drive *d;
int start, end;
{
return (wm_scsi2_play(d, start, end));
}
/*
* Eject the current CD, if there is one.
*/
int
gen_eject(struct wm_drive *d)
{
return (wm_scsi2_eject(d));
} /* gen_eject() */
/*
* Close the tray.
* please review scsi.c / wm_scsi2_closetray()
* and send changes to milliByte@DeathsDoor.com
*/
int
gen_closetray( struct wm_drive *d )
{
return(wm_scsi2_closetray(d));
} /* gen_closetray() */
static int
create_cdrom_node(char *dev_name)
{
char pass_through[100];
int file_des;
dev_t pass_thru_device;
int err;
int ccode;
strcpy(pass_through, dev_name);
strcat(pass_through, "p" );
if (setreuid(-1,0) < 0)
{
perror("setregid/setreuid/access");
exit(1);
}
ccode = access(pass_through, F_OK);
if (ccode < 0)
{
if ((file_des = open(dev_name, O_RDONLY)) < 0)
{
perror("open cdrom devices failed");
return -1;
}
if (ioctl(file_des, B_GETDEV, &pass_thru_device) < 0)
{
perror("Call to get pass-through device number failed");
return -1;
}
(void)close(file_des);
if (mknod(pass_through, (S_IFCHR | S_IREAD | S_IWRITE),
pass_thru_device) < 0)
{
perror("Unable to make pass-through node");
return -1;
}
if (chown(pass_through, 0 , 0) < 0)
{
perror("chown");
return -1;
}
if (chmod(pass_through, 0660 ) < 0)
{
perror("chmod");
return -1;
}
}
file_des = open( pass_through, O_RDWR);
err = errno;
if ( (setreuid(-1,getuid()) < 0) || (setregid(-1,getgid()) < 0) )
{
perror("setreuid/setregid");
exit(1);
}
errno = err;
return file_des;
}
/*
* Open the CD and figure out which kind of drive is attached.
*/
int
wmcd_open(d)
struct wm_drive *d;
{
int fd, flag = 1;
static int warned = 0;
char vendor[32] = WM_STR_GENVENDOR;
char model[32] = WM_STR_GENMODEL;
char rev[32] = WM_STR_GENREV;
if (d->fd >= 0) /* Device already open? */
return (0);
if (cd_device == NULL)
cd_device = DEFAULT_CD_DEVICE;
d->fd = create_cdrom_node(cd_device); /* this will do open */
if (d->fd < 0)
{
if (errno == EACCES)
{
if (! warned)
{
fprintf(stderr,"Cannot access %s\n",cd_device);
warned++;
}
}
else if (errno != EINTR)
{
perror(cd_device);
exit(1);
}
/* No CD in drive. (Is this true also for svr4 ? XXX ) */
return (1);
}
if (warned)
{
warned = 0;
fprintf(stderr, "Thank you.\n");
}
/* Now fill in the relevant parts of the wm_drive structure. */
fd = d->fd;
if (wm_scsi_get_drive_type(d, vendor, model, rev) < 0)
{
perror("Cannot inquiry drive for it's type");
exit(1);
}
*d = *(find_drive_struct(vendor, model, rev));
wm_drive_settype(vendor, model, rev);
d->fd = fd;
return (0);
} /* wmcd_open() */
/*
* Re-Open the device if it is open.
*/
int
wmcd_reopen( struct wm_drive *d )
{
int status;
do {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen ");
if (d->fd >= 0) /* Device really open? */
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "closes the device and ");
status = close( d->fd ); /* close it! */
/* we know, that the file is closed, do we? */
d->fd = -1;
}
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 );
} while ( status != 0 );
return status;
} /* wmcd_reopen() */
/*
* Send a SCSI command out the bus.
*/
int
wm_scsi(d, xcdb, cdblen, retbuf, retbuflen, getreply)
struct wm_drive *d;
unsigned char *xcdb;
int cdblen;
int getreply;
char *retbuf;
int retbuflen;
{
int ccode;
int file_des = d->fd;
int i,j;
unsigned char sense_buffer[ SENSE_SZ ];
int errno_save;
/* getreply == 1 is read, == 0 is write */
struct sb sb;
struct scs scs;
sb.sb_type = ISCB_TYPE;
sb.SCB.sc_comp_code = SDI_PROGRES;
sb.SCB.sc_int = NULL;
sb.SCB.sc_wd = 0;
sb.SCB.sc_dev.sa_major = 0;
sb.SCB.sc_dev.sa_minor = 0;
sb.SCB.sc_dev.sa_lun = 0;
sb.SCB.sc_dev.sa_exlun = 0;
sb.SCB.sc_status = 0;
sb.SCB.sc_link = (struct sb *) NULL;
sb.SCB.sc_resid = 0;
sb.SCB.sc_cmdpt = (void *)xcdb;
sb.SCB.sc_cmdsz = cdblen;
sb.SCB.sc_datapt = retbuf ;
sb.SCB.sc_datasz = retbuflen ;
if (getreply == 1)
sb.SCB.sc_mode = SCB_READ;
else
sb.SCB.sc_mode = SCB_WRITE;
sb.SCB.sc_time = 500;
ccode = ioctl(file_des, SDI_SEND, &sb);
if ( (sb.SCB.sc_comp_code != 0xd000000e ) ||
( sb.SCB.sc_status != 02) )
return ccode;
errno_save = errno;
sb.SCB.sc_comp_code = SDI_PROGRES;
sb.SCB.sc_int = NULL;
sb.SCB.sc_wd = 0;
sb.SCB.sc_dev.sa_major = 0;
sb.SCB.sc_dev.sa_minor = 0;
sb.SCB.sc_dev.sa_lun = 0;
sb.SCB.sc_dev.sa_exlun = 0;
sb.SCB.sc_status = 0;
sb.SCB.sc_link = (struct sb *) NULL;
sb.SCB.sc_resid = 0;
scs.ss_op = SS_REQSEN;
scs.ss_lun = 0;
scs.ss_addr1 = 0;
scs.ss_addr = 0;
scs.ss_len = SENSE_SZ;
scs.ss_cont = 0;
sb.SCB.sc_cmdpt = SCS_AD(&scs);
sb.SCB.sc_cmdsz = SCS_SZ;
sb.SCB.sc_datapt = sense_buffer;
sb.SCB.sc_datasz = 18;
sb.SCB.sc_mode = SCB_READ;
sb.SCB.sc_time = 5000;
if (ioctl(file_des, SDI_SEND, &sb) < 0)
{
fprintf(stderr,"Cannot read sense.\n");
exit(-1);
}
errno=errno_save;
return -1;
}
#endif
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