--- cdrtools-2.01/scsilib/libscg/oexcl.c.excl	2004-09-22 12:03:23.426676328 +0200
+++ cdrtools-2.01/scsilib/libscg/oexcl.c	2004-09-22 12:03:23.426676328 +0200
@@ -0,0 +1,29 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+int openexcl(const char *device, int mode)
+{
+  int f, i;
+
+  f = open(device, mode | O_EXCL);
+
+  if (f < 0) {
+    f = open(device, mode);
+
+    if (f >= 0) {
+      close(f);
+      f = -1;
+      for (i = 0; (i < 10) && (f == -1); i++) {
+	fprintf(stderr, "Error trying to open %s exclusively ... retrying in 1 second.\n", device);
+	usleep(1000000 + 100000.0 * rand()/(RAND_MAX+1.0));
+	f = open(device, O_RDONLY | O_NONBLOCK | O_EXCL);
+      }
+    }
+  }
+
+  return f;
+}
--- cdrtools-2.01/scsilib/libscg/scsi-linux-ata.c.excl	2004-09-22 12:03:23.423676784 +0200
+++ cdrtools-2.01/scsilib/libscg/scsi-linux-ata.c	2004-09-22 12:03:23.427676176 +0200
@@ -112,6 +112,7 @@
 LOCAL	void	sglog		__PR((const char *fmt, ...));
 
 #include <vadefs.h>
+#include "oexcl.h"
 
 /* VARARGS1 */
 #ifdef	PROTOTYPES
@@ -267,7 +268,7 @@
 			starget,
 			slun;
 
-		f = open(device, O_RDWR | O_NONBLOCK);
+		f = openexcl(device, O_RDWR | O_NONBLOCK);
 
 		if (f < 0) {
 			if (scgp->errstr)
--- cdrtools-2.01/scsilib/libscg/oexcl.h.excl	2004-09-22 12:03:23.428676024 +0200
+++ cdrtools-2.01/scsilib/libscg/oexcl.h	2004-09-22 12:03:23.428676024 +0200
@@ -0,0 +1,5 @@
+#ifndef OEXCL_H
+
+extern int openexcl(const char *device, int mode);
+
+#endif
--- cdrtools-2.01/scsilib/libscg/Targets.excl	2002-10-19 20:33:37.000000000 +0200
+++ cdrtools-2.01/scsilib/libscg/Targets	2004-09-22 12:03:23.428676024 +0200
@@ -1,3 +1,3 @@
 CFILES=		scsitransp.c scsihack.c scsiopen.c scgsettarget.c \
-		scsierrs.c scgtimes.c scsihelp.c \
+		scsierrs.c scgtimes.c scsihelp.c oexcl.c \
 		rdummy.c
--- cdrtools-2.01/scsilib/libscg/scsi-linux-sg.c.excl	2004-09-22 12:03:23.422676936 +0200
+++ cdrtools-2.01/scsilib/libscg/scsi-linux-sg.c	2004-09-22 12:12:49.271654816 +0200
@@ -79,6 +79,7 @@
 #endif
 
 #include "scsi/sg.h"
+#include "oexcl.h"
 
 #undef sense			/* conflict in struct cdrom_generic_command */
 #include <linux/cdrom.h>
@@ -94,7 +95,7 @@
  *	Choose your name instead of "schily" and make clear that the version
  *	string is related to a modified source.
  */
-LOCAL	char	_scg_trans_version[] = "scsi-linux-sg.c-1.83";	/* The version for this transport*/
+LOCAL	char	_scg_trans_version[] = "scsi-linux-sg.c-1.83-RH";	/* The version for this transport*/
 
 #ifndef	SCSI_IOCTL_GET_BUS_NUMBER
 #define	SCSI_IOCTL_GET_BUS_NUMBER 0x5386
@@ -247,7 +249,7 @@
 		 * return "schily" for the SCG_AUTHOR request.
 		 */
 		case SCG_AUTHOR:
-			return (_scg_auth_schily);
+			return ("schily - Red Hat");
 		case SCG_SCCS_ID:
 			return (__sccsid);
 		case SCG_KVERSION:
@@ -479,7 +483,7 @@
 				b = -1;
 		}
 		/* O_NONBLOCK is dangerous */
-		f = open(device, O_RDWR | O_NONBLOCK);
+		f = openexcl(device, O_RDWR | O_NONBLOCK);
 /*		if (f < 0 && errno == ENOENT)*/
 /*			goto openpg;*/