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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* Copyright (c) 2009 Douglas Gilbert.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#define __STDC_FORMAT_MACROS 1
#include <inttypes.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "sg_lib.h"
#include "sg_cmds_basic.h"
#include "sg_cmds_extra.h"
/* A utility program originally written for the Linux OS SCSI subsystem.
*
*
* This program issues the SCSI READ BLOCK LIMITS command (SSC) to the given
* SCSI device.
*/
static char * version_str = "1.01 20090816";
#define MAX_READ_BLOCK_LIMITS_LEN 6
static unsigned char readBlkLmtBuff[MAX_READ_BLOCK_LIMITS_LEN];
static struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"hex", no_argument, 0, 'H'},
{"raw", no_argument, 0, 'r'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{0, 0, 0, 0},
};
static void
usage()
{
fprintf(stderr, "Usage: "
"sg_read_block_limits [--help] [--hex] [--raw] [--verbose] "
"[--version]\n"
" DEVICE\n"
" where:\n"
" --help|-h print out usage message\n"
" --hex|-H output response in hexadecimal\n"
" --raw|-r output response in binary to stdout\n"
" --verbose|-v increase verbosity\n"
" --version|-V print version string and exit\n\n"
"Performs a SCSI READ BLOCK LIMITS command and decode the "
"response\n"
);
}
static void
dStrRaw(const char* str, int len)
{
int k;
for (k = 0 ; k < len; ++k)
printf("%c", str[k]);
}
int
main(int argc, char * argv[])
{
int sg_fd, k, m, res, c;
int do_hex = 0;
int do_raw = 0;
int verbose = 0;
const char * device_name = NULL;
int ret = 0;
uint32_t max_block_size;
uint16_t min_block_size;
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "hHrvV", long_options,
&option_index);
if (c == -1)
break;
switch (c) {
case 'h':
case '?':
usage();
return 0;
case 'H':
++do_hex;
break;
case 'r':
++do_raw;
break;
case 'v':
++verbose;
break;
case 'V':
fprintf(stderr, "version: %s\n", version_str);
return 0;
default:
fprintf(stderr, "invalid option -%c ??\n", c);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
if (optind < argc) {
if (NULL == device_name) {
device_name = argv[optind];
++optind;
}
if (optind < argc) {
for (; optind < argc; ++optind)
fprintf(stderr, "Unexpected extra argument: %s\n",
argv[optind]);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
if (NULL == device_name) {
fprintf(stderr, "missing device name!\n");
usage();
return SG_LIB_SYNTAX_ERROR;
}
sg_fd = sg_cmds_open_device(device_name, 0 /* rw */, verbose);
if (sg_fd < 0) {
fprintf(stderr, "open error: %s: %s\n", device_name,
safe_strerror(-sg_fd));
return SG_LIB_FILE_ERROR;
}
memset(readBlkLmtBuff, 0x0, 6);
res = sg_ll_read_block_limits(sg_fd, readBlkLmtBuff, 6, 1,
verbose);
ret = res;
if (0 == res) {
if (do_hex) {
dStrHex((const char *)readBlkLmtBuff, sizeof(readBlkLmtBuff), 1);
goto the_end;
} else if (do_raw) {
dStrRaw((const char *)readBlkLmtBuff, sizeof(readBlkLmtBuff));
goto the_end;
}
max_block_size = (readBlkLmtBuff[0] << 24) +
(readBlkLmtBuff[1] << 16) +
(readBlkLmtBuff[2] << 8) + readBlkLmtBuff[3];
min_block_size = (readBlkLmtBuff[4] << 8) + readBlkLmtBuff[5];
k = min_block_size / 1024;
fprintf(stderr, "Read Block Limits results:\n");
fprintf(stderr, "\tMinimum block size: %d byte(s)",
(int)min_block_size);
if (k != 0)
fprintf(stderr, ", %d KB", k);
fprintf(stderr, "\n");
k = max_block_size / 1024;
m = max_block_size / 1048576;
fprintf(stderr, "\tMaximum block size: %d byte(s)",
max_block_size);
if (k != 0)
fprintf(stderr, ", %d KB", k);
if (m != 0)
fprintf(stderr, ", %d MB", m);
fprintf(stderr, "\n");
} else if (SG_LIB_CAT_INVALID_OP == res)
fprintf(stderr, "Read block limits not supported\n");
else if (SG_LIB_CAT_ABORTED_COMMAND == res)
fprintf(stderr, "Read block limits, aborted command\n");
else if (SG_LIB_CAT_ILLEGAL_REQ == res)
fprintf(stderr, "Read block limits command has bad field in cdb\n");
else {
fprintf(stderr, "Read block limits command failed\n");
if (0 == verbose)
fprintf(stderr, " try '-v' option for more information\n");
}
the_end:
res = sg_cmds_close_device(sg_fd);
if (res < 0) {
fprintf(stderr, "close error: %s\n", safe_strerror(-res));
if (0 == ret)
return SG_LIB_FILE_ERROR;
}
return (ret >= 0) ? ret : SG_LIB_CAT_OTHER;
}
|
