drv_type.c

读取音乐光盘磁道为磁盘文件的程序

/*
 * $Id: drv_type.c,v 1.4 1997/10/14 07:33:22 jim Exp $
 * Get CDROM drive type
 *
 * $Log: drv_type.c,v $
 * Revision 1.4  1997/10/14 07:33:22  jim
 * can specify device.  Output stuff to stderr
 *
 * Revision 1.3  1996/06/04 23:02:28  jim
 * Patch from Hans Werner Strube ([e-mail])
 * to open volmgt device if normal open fails.
 *
 * Revision 1.2  1996/01/18 14:21:39  jim
 * Fixing a casting warning
 *
 * Revision 1.1  1996/01/18 14:06:37  jim
 * Initial revision
 *
 */

#include "read_cdda.h"

/* 
 * send command to CD-ROM to read model and vendor.
 */

void
get_drv_type(int fd, char *device)
{
  struct uscsi_cmd cmd;
  unsigned char cdb[12];
  unsigned char buf[36];
  char vendor[STR_LEN], model[STR_LEN], rev[STR_LEN];
    
  /* open the device */
  if(device != NULL)
    fd = open(device, 0);
  else {
    fd = open("/dev/rdsk/c0t6d0s2", 0);
    if(fd < 0)
      fd = open("/vol/dev/aliases/cdrom0", 0);
  }
  
  if(fd < 0)
    pop_error(ERR_FILE, "Open of CD-ROM device failed");

  cdb[0] = SCMD_INQUIRY;
  cdb[1] = 0;
  cdb[2] = 0;
  cdb[3] = 0;
  cdb[4] = 36;
  cdb[5] = 0;
  
  memset(&cmd, 0, sizeof(cmd));
  cmd.uscsi_cdb = (void *) &cdb;
  cmd.uscsi_cdblen = 6;
  cmd.uscsi_bufaddr = (void *) &buf;
  cmd.uscsi_buflen = 36;
  cmd.uscsi_flags = USCSI_ISOLATE | USCSI_SILENT | USCSI_READ;

  if(ioctl(fd, USCSICMD, &cmd))
    pop_error(ERR_GEN, "Error getting drive type");
  
  if(cmd.uscsi_status)
    pop_error(ERR_GEN, "Getting drive type returned error");
  
  memcpy(vendor, buf + 8, 8);
  vendor[8] = '\0';
  memcpy(model, buf + 16, 16);
  model[16] = '\0';
  memcpy(rev, buf + 32, 4);
  rev[4] = '\0';
  
  /* print out the info */

  fprintf(stderr, "Vendor: %s\n", vendor);
  fprintf(stderr, " Model: %s\n", model);
  fprintf(stderr, "  rev.: %s\n", rev);
}