File indexing completed on 2024-04-21 04:54:23

 /*
  * This file is part of WorkMan, the civilized CD player library
  * Copyright (C) 1991-1997 by Steven Grimm <koreth@midwinter.com>
  * Copyright (C) by Dirk Försterling <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
  *
  *
  * SCO Openserver R5 specific. Derived from the KSCD plat_scor5.c
  *
  */
 
 #if defined(M_UNIX) || defined(__M_UNIX)
 
 #include "include/wm_config.h"
 
 #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/stat.h>
 #include <sys/scsi.h>
 #include <sys/scsicmd.h>
 #include <errno.h>
 #include <macros.h>
 
 #include "include/wm_struct.h"
 #include "include/gen_scsi.h"
 #include "include/wm_cdtext.h"
 
 #define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
 
 #define SENSE_SZ EXTD_SENSE_LEN
 
 void *malloc();
 char *strchr();
 
 int min_volume = 0;
 int max_volume = 255;
 
 /*
  * platformspecific internal function
  */
 static int
 create_cdrom_node(char *dev_name)
 {
   char pass_through[100];
   int file_des;
   struct stat sbuf;
   int err;
   int ccode;
 
 
   strncpy(pass_through, dev_name, sizeof(pass_through)-2);
   pass_through[sizeof(pass_through) - 2] = '\0';
   strcat(pass_through, "p" );
 
   if (setreuid(-1,0) < 0)
     {
       perror("setregid/setreuid/access");
       return -1;
     }
 
   ccode = access(pass_through, F_OK);
 
   if (ccode < 0)
     {
 
       if (stat(dev_name, &sbuf) < 0)
     {
       perror("Call to get pass-through device number failed");
       return -1;
     }
 
       if (mknod(pass_through, (S_IFCHR | S_IREAD | S_IWRITE),
         sbuf.st_rdev) < 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_RDONLY);
   err = errno;
 
   /*
   if ( (setreuid(-1,getuid()) < 0) || (setregid(-1,getgid()) < 0) )
     {
       perror("setreuid/setregid");
       exit(1);
     }
 
   */
 
   errno = err;
   return file_des;
 } /* create_cdrom_node() */
 
 
 /*
  * Initialize the drive.  A no-op for the generic driver.
  */
 int
 gen_init(struct wm_drive *d)
 {
   return (0);
 } /* gen_init() */
 
 /*
  * Open the CD and figure out which kind of drive is attached.
  */
 int
 gen_open(struct wm_drive *d)
 {
     if (d->fd > -1) {       /* Device already open? */
         wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "gen_open(): [device is open (fd=%d)]\n", d->fd);
         return 0;
     }
 
     d->fd = create_cdrom_node(d->cd_device); /* this will do open */
     if (d->fd < 0) {
         if (errno == EACCES) {
         } else if (errno != EINTR) {
             perror(d->cd_device);
             return -6;
         }
 
         /* cannot access CDROM device */
         return -1;
     }
 
     return 0;
 } /* gen_open */
 
 /*
  * Send a SCSI command out the bus.
  */
 int
 gen_scsi(struct wm_drive *d, unsigned char *xcdb, int cdblen,
     char *retbuf, int retbuflen, int getreply)
 {
   int ccode;
   int file_des = d->fd;
   unsigned char sense_buffer[ SENSE_SZ ];
 
   /* getreply == 1 is read, == 0 is write */
 
   struct scsicmd2 sb;   /* Use command with automatic sense */
 
   if (cdblen > SCSICMDLEN)
     {
       fprintf(stderr,"Cannot handle longer commands than %d bytes.\n", SCSICMDLEN);
       exit(-1);
     }
 
   /* Get the command */
   memcpy(sb.cmd.cdb, xcdb, cdblen);
   sb.cmd.cdb_len = cdblen;
 
   /* Point to data buffer */
   sb.cmd.data_ptr = retbuf;
   sb.cmd.data_len = retbuflen;
 
   /* Is this write or read ? */
   sb.cmd.is_write = (getreply==1) ? 0 : 1;
 
   /* Zero out return status fields */
   sb.cmd.host_sts = 0;
   sb.cmd.target_sts = 0;
 
   /* Set up for possible sense info */
 
   sb.sense_ptr = sense_buffer;
   sb.sense_len = sizeof(sense_buffer);
 
   ccode =  ioctl(file_des, SCSIUSERCMD2,  &sb);
 
   if ( sb.cmd.target_sts != 02 )
     return ccode;
 
   return 0;
 } /* gen_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;
 }
 
 void
 keep_cd_open() { }
 
 /*
  * 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(wm_drive *d, int oldmode, int *mode,
              int *pos, int *track, int *index)
 {
   return (wm_scsi2_get_drive_status(d, oldmode, mode, pos, track, index));
 } /* gen_get_drive_status() */
 
 /*
  * Get the number of tracks on the CD.
  */
 int
 gen_get_trackcount(struct wm_drive *d, int *tracks)
 {
   return (wm_scsi2_get_trackcount(d, tracks));
 } /* 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)
 {
   return (wm_scsi2_get_trackinfo(d, track, data, startframe));
 } /* gen_get_trackinfo() */
 
 /*
  * Get the number of frames on the CD.
  */
 int
 gen_get_cdlen(struct wm_drive *d, int *frames)
 {
   return (wm_scsi2_get_cdlen(d, 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)
 {
   return (wm_scsi2_play(d, start, end));
 } /* gen_play() */
 
 /*
  * Pause the CD.
  */
 int
 gen_pause( struct wm_drive *d )
 {
   return (wm_scsi2_pause(d));
 } /* gen_pause() */
 
 /*
  * Resume playing the CD (assuming it was paused.)
  */
 int
 gen_resume( struct wm_drive *d )
 {
   return (wm_scsi2_resume(d));
 } /* gen_resume() */
 
 /*
  * Stop the CD.
  */
 int
 gen_stop(struct wm_drive *d)
 {
   return (wm_scsi2_stop(d));
 } /* gen_stop() */
 
 /*
  * Eject the current CD, if there is one.
  */
 int
 gen_eject(struct wm_drive *d)
 {
   int stat;
 
   stat = wm_scsi2_eject(d);
   wm_susleep(1000);
   return (stat);
 } /* gen_eject() */
 
 
 int
 gen_closetray(struct wm_drive *d)
 {
   return(wm_scsi2_closetray(d));
 } /* gen_closetray() */
 
 
 /*
  * 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)
 {
   return (wm_scsi2_set_volume(d, left, right));
 } /* gen_set_volume() */
 
 /*
  * 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(struct wm_drive *d, int *left, int *right)
 {
     return (wm_scsi2_get_volume(d, left, right));
 } /* gen_get_volume() */
 
 #endif /* M_UNIX */