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/*
* Copyright (c) 2005-2018 Douglas Gilbert.
* All rights reserved.
* Use of this source code is governed by a BSD-style
* license that can be found in the BSD_LICENSE file.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <getopt.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "sg_lib.h"
#include "sg_cmds_basic.h"
#include "sg_cmds_extra.h"
#include "sg_unaligned.h"
#include "sg_pr2serr.h"
/* A utility program was originally written for the Linux OS SCSI subsystem.
*
*
* This program issues the SCSI command READ MEDIA SERIAL NUMBER
* to the given SCSI device.
*/
static const char * version_str = "1.18 20180628";
#define SERIAL_NUM_SANITY_LEN (16 * 1024)
static struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"raw", no_argument, 0, 'r'},
{"readonly", no_argument, 0, 'R'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{0, 0, 0, 0},
};
static void usage()
{
pr2serr("Usage: sg_rmsn [--help] [--raw] [--readonly] [--verbose] "
"[--version]\n"
" DEVICE\n"
" where:\n"
" --help|-h print out usage message\n"
" --raw|-r output serial number to stdout "
"(potentially binary)\n"
" --readonly|-R open DEVICE read-only (def: open it "
"read-write)\n"
" --verbose|-v increase verbosity\n"
" --version|-V print version string and exit\n\n"
"Performs a SCSI READ MEDIA SERIAL NUMBER command\n");
}
int main(int argc, char * argv[])
{
bool raw = false;
bool readonly = false;
bool verbose_given = false;
bool version_given = false;
int res, c, sn_len, n;
int sg_fd = -1;
int ret = 0;
int verbose = 0;
uint8_t rmsn_buff[4];
uint8_t * bp = NULL;
const char * device_name = NULL;
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "hrRvV", long_options,
&option_index);
if (c == -1)
break;
switch (c) {
case 'h':
case '?':
usage();
return 0;
case 'r':
raw = true;
break;
case 'R':
readonly = true;
break;
case 'v':
verbose_given = true;
++verbose;
break;
case 'V':
version_given = true;
break;
default:
pr2serr("unrecognised option code 0x%x ??\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)
pr2serr("Unexpected extra argument: %s\n", argv[optind]);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
#ifdef DEBUG
pr2serr("In DEBUG mode, ");
if (verbose_given && version_given) {
pr2serr("but override: '-vV' given, zero verbose and continue\n");
verbose_given = false;
version_given = false;
verbose = 0;
} else if (! verbose_given) {
pr2serr("set '-vv'\n");
verbose = 2;
} else
pr2serr("keep verbose=%d\n", verbose);
#else
if (verbose_given && version_given)
pr2serr("Not in DEBUG mode, so '-vV' has no special action\n");
#endif
if (version_given) {
pr2serr("version: %s\n", version_str);
return 0;
}
if (NULL == device_name) {
pr2serr("missing device name!\n");
usage();
return SG_LIB_SYNTAX_ERROR;
}
if (raw) {
if (sg_set_binary_mode(STDOUT_FILENO) < 0) {
perror("sg_set_binary_mode");
return SG_LIB_FILE_ERROR;
}
}
sg_fd = sg_cmds_open_device(device_name, readonly, verbose);
if (sg_fd < 0) {
if (verbose)
pr2serr("open error: %s: %s\n", device_name,
safe_strerror(-sg_fd));
ret = sg_convert_errno(-sg_fd);
goto err_out;
}
memset(rmsn_buff, 0x0, sizeof(rmsn_buff));
res = sg_ll_read_media_serial_num(sg_fd, rmsn_buff, sizeof(rmsn_buff),
true, verbose);
ret = res;
if (0 == res) {
sn_len = sg_get_unaligned_be32(rmsn_buff + 0);
if (! raw)
printf("Reported serial number length = %d\n", sn_len);
if (0 == sn_len) {
pr2serr(" This implies the media has no serial number\n");
goto err_out;
}
if (sn_len > SERIAL_NUM_SANITY_LEN) {
pr2serr(" That length (%d) seems too long for a serial "
"number\n", sn_len);
goto err_out;
}
sn_len += 4;
bp = (uint8_t *)malloc(sn_len);
if (NULL == bp) {
pr2serr(" Out of memory (ram)\n");
goto err_out;
}
res = sg_ll_read_media_serial_num(sg_fd, bp, sn_len, true, verbose);
if (0 == res) {
sn_len = sg_get_unaligned_be32(bp + 0);
if (raw) {
if (sn_len > 0) {
n = fwrite(bp + 4, 1, sn_len, stdout);
if (n) { ; } /* unused, dummy to suppress warning */
}
} else {
printf("Serial number:\n");
if (sn_len > 0)
hex2stdout(bp + 4, sn_len, 0);
}
}
}
if (res) {
char b[80];
sg_get_category_sense_str(res, sizeof(b), b, verbose);
pr2serr("Read Media Serial Number: %s\n", b);
if (0 == verbose)
pr2serr(" try '-v' for more information\n");
}
err_out:
if (bp)
free(bp);
if (sg_fd >= 0) {
res = sg_cmds_close_device(sg_fd);
if (res < 0) {
pr2serr("close error: %s\n", safe_strerror(-res));
if (0 == ret)
ret = sg_convert_errno(-res);
}
}
if (0 == verbose) {
if (! sg_if_can2stderr("sg_rmsn failed: ", ret))
pr2serr("Some error occurred, try again with '-v' "
"or '-vv' for more information\n");
}
return (ret >= 0) ? ret : SG_LIB_CAT_OTHER;
}
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