1 files changed, 124 insertions, 0 deletions
diff --git a/mam2debug2.c b/mam2debug2.c
new file mode 100644
index 0000000..9d59395
--- /dev/null
+++ b/mam2debug2.c
@@ -0,0 +1,124 @@
+/* Mammoth 2 Debug Buffer Dumper
+   Copyright 2000 Enhanced Software Technologies Inc.
+   Copyright 2007-2008 by Robert Nelson <robertn@the-nelsons.org>
+
+$Date: 2008-08-19 03:03:38 -0700 (Tue, 19 Aug 2008) $
+$Revision: 193 $
+
+   Written by Eric Lee Green <eric@badtux.org>
+   Released under the terms of the GNU General Public License v2 or
+    above.
+
+   This is an example of how to use the mtx library file 'mtxl.c' to
+   do a special-purpose task -- dump the Mammoth2 debug buffer, in this case. 
+   Note that this debug buffer is 1M-4M in size, thus may overwhelm the
+   SCSI generic subsystem on some supported platforms...
+
+   syntax:
+
+   mam2debug generic-filename output-filename.
+
+
+*/
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "mtx.h"
+#include "mtxl.h"
+
+/* This is a TOTALLY UNDOCUMENTED feature to read the debug data buffer
+ * in an Exabyte Mammoth II and dump it to a file:
+ */
+
+static RequestSense_T *DumpM2DebugBuff(DEVICE_TYPE MediumChangerFD, int outfile) 
+{
+  RequestSense_T *RequestSense = xmalloc(sizeof(RequestSense_T));
+  CDB_T CDB;
+
+  unsigned char *databuffer;
+  unsigned char buff_descriptor[4];
+  int numbytes;
+  int testbytes;
+
+  CDB[0]=0x3c; /* command. */ 
+  CDB[1]=0x03;  /* mode - read buff_descriptor! */ 
+  CDB[2]=0x00;    /* page -- data. */ 
+  CDB[3]=0;   /* offset. */
+  CDB[4]=0;
+  CDB[5]=0;  
+  CDB[6]=0;    /* length. */
+  CDB[7]=0;
+  CDB[8]=4;   /* the descriptor is 4 long. */ 
+  CDB[9]=0;
+  
+  if ((testbytes=SCSI_ExecuteCommand(MediumChangerFD, Input, &CDB, 10,
+			  buff_descriptor, 4, RequestSense)) != 0){
+    fprintf(stderr,"mam2debug: could not read buff_descriptor. [%d]\n",testbytes);
+    return RequestSense;  /* couldn't do it. */ 
+  }
+
+  /* okay, read numbytes: */
+  numbytes=(buff_descriptor[1]<<16) + (buff_descriptor[2]<<8) + buff_descriptor[3];
+  databuffer=(unsigned char *) xmalloc(numbytes+1000000); /* see if this helps :-(. */
+  CDB[6]=buff_descriptor[1];
+  CDB[7]=buff_descriptor[2];
+  CDB[8]=buff_descriptor[3];
+
+  CDB[1]=0x02; /* mode -- read buffer! */
+  
+  if (SCSI_ExecuteCommand(MediumChangerFD, Input, &CDB, 10,
+			  databuffer, numbytes, RequestSense) != 0){
+    fprintf(stderr,"mam2debug: could not read buffer.\n");
+    free(databuffer);
+    return RequestSense;  /* couldn't do it. */ 
+  }
+  
+  write(outfile,databuffer,numbytes);
+  close(outfile);
+  free(databuffer);
+  free(RequestSense);
+  return NULL;  /* okay! */
+}
+
+static void usage(void) {
+  fprintf(stderr,"Usage: mam2debug scsi-generic-file output-file-name\n");
+  exit(1);
+}
+
+/* Now for the actual main() routine: */
+
+int main(int argc,char** argv) {
+  DEVICE_TYPE changer_fd;
+  static RequestSense_T *result;
+  int outfile;
+
+  if (argc != 3) {
+    usage();
+  }
+  
+  changer_fd=SCSI_OpenDevice(argv[1]);
+  
+  if (changer_fd <= 0) {
+    fprintf(stderr,"Could not open input device\n");
+    usage();
+  }
+
+  outfile=open(argv[2],O_CREAT|O_WRONLY);
+  if (outfile <=0) {
+    fprintf(stderr,"Could not open output file\n");
+    usage();
+  }
+
+  result=DumpM2DebugBuff(changer_fd, outfile);
+
+  if (result) {
+    PrintRequestSense(result);
+    exit(1);
+  }
+
+  exit(0);
+}
+