File indexing completed on 2024-04-21 04:54:24

 /*
  * 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
  *
  *
  * SVR4 specific.  Much of this is similar to plat_hpux.c.
  */
 
 #if (defined(SVR4) || defined(__SVR4)) && !defined(sun) && !defined(__sun) && !defined(sony_news) && !defined(__sony_news)
 
 
 #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"
 #include "include/wm_cdtext.h"
 
 #define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
 
 
 void *malloc();
 char *strchr();
 
 int min_volume = 0;
 int max_volume = 255;
 
 static int
 create_cdrom_node(char *dev_name)
 {
   char pass_through[100];
   int file_des;
   dev_t pass_thru_device;
   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 ((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");
       return -1;
     }
   errno = err;
   return file_des;
 } /* create_cdrom_node() */
 
 const char*
 find_cdrom()
 {
   /*
   ** the path of the device has to start w/ /dev
   ** otherwise we are vulnerable to race conditions
   ** Thomas Biege <thomas@suse.de>
   */
   const char* device = NULL;
 
   device = getenv("CDROM");
   if ( (device != NULL) &&
        !(strncmp("/dev/", device, 5) ||
      strstr(_device, "/../") ))
     return device;
 
   if (access("/dev/cdrom/cdrom1", F_OK) == 0)
     {
       return "/dev/cdrom/cdrom1";
     }
   else if (access("/dev/cdrom/cdrom2", F_OK) == 0)
     {
       return "/dev/cdrom/cdrom2";
     }
   else
     {
       fprintf(stderr, "Could not find a CD device!\n");
       return NULL;
     }
 } /* find_cdrom() */
 
 /*
  * 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 >= 0) {       /* 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)
             return -6;
 
         /* No CD in drive. (Is this true also for svr4 ? XXX ) */
         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;
   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;
 } /* 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;
 }
 
 /*
  * 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 *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)
 {
   int tmp;
 
   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)
 {
   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() */
 
 
 /*
  * 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