1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
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);
}
|
