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/*
* Copyright (c) 2005 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 <errno.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "sg_include.h"
#include "sg_lib.h"
#include "sg_cmds.h"
/* A utility program for the Linux OS SCSI subsystem.
*
*
* This program issues these SCSI commands: REPORT DEVICE IDENTIFIER,
* SET DEVICE IDENTIFIER and/or INQUIRY (VPD=0x83 [device identifier]).
*/
static char * version_str = "1.00 20050808";
#define ME "sg_ident: "
#define REPORT_DEV_ID_SANITY_LEN 512
static struct option long_options[] = {
{"ascii", 0, 0, 'A'},
{"clear", 0, 0, 'C'},
{"help", 0, 0, 'h'},
{"raw", 0, 0, 'r'},
{"set", 0, 0, 'S'},
{"verbose", 0, 0, 'v'},
{"version", 0, 0, 'V'},
{0, 0, 0, 0},
};
static void usage()
{
fprintf(stderr, "Usage: "
"sg_ident [--ascii] [--clear] [--help] [--raw] [--set] "
"[--verbose]\n"
" [--version] <scsi_device>\n"
" where: --ascii|-A report device identifier as ASCII "
"string\n"
" --clear|-C clear (set to zero length) device "
"identifier\n"
" --help|-h print out usage message\n"
" --raw|-r output device identifier to stdout\n"
" fetch from stdin (when '--set')\n"
" --set|-S invoke set device identifier with data "
"from stdin\n"
" --verbose|-v set device identifier\n"
" --version|-V print version string and exit\n\n"
"Performs a REPORT or SET DEVICE IDENTIFIER SCSI command\n"
);
}
int main(int argc, char * argv[])
{
int sg_fd, res, c, di_len, n;
unsigned char rdi_buff[REPORT_DEV_ID_SANITY_LEN + 4];
unsigned char * ucp = NULL;
int ascii = 0;
int do_clear = 0;
int raw = 0;
int do_set = 0;
int verbose = 0;
char device_name[512];
int ret = 1;
memset(device_name, 0, sizeof device_name);
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "AChrSvV", long_options,
&option_index);
if (c == -1)
break;
switch (c) {
case 'A':
ascii = 1;
break;
case 'C':
do_clear = 1;
break;
case 'h':
case '?':
usage();
return 0;
case 'r':
raw = 1;
break;
case 'S':
do_set = 1;
break;
case 'v':
++verbose;
break;
case 'V':
fprintf(stderr, ME "version: %s\n", version_str);
return 0;
default:
fprintf(stderr, "unrecognised switch code 0x%x ??\n", c);
usage();
return 1;
}
}
if (optind < argc) {
if ('\0' == device_name[0]) {
strncpy(device_name, argv[optind], sizeof(device_name) - 1);
device_name[sizeof(device_name) - 1] = '\0';
++optind;
}
if (optind < argc) {
for (; optind < argc; ++optind)
fprintf(stderr, "Unexpected extra argument: %s\n",
argv[optind]);
usage();
return 1;
}
}
if (0 == device_name[0]) {
fprintf(stderr, "missing device name!\n");
usage();
return 1;
}
if (do_set && do_clear) {
fprintf(stderr, "only one of '--clear' and '--set' can be given\n");
usage();
return 1;
}
if (ascii && raw) {
fprintf(stderr, "only one of '--ascii' and '--raw' can be given\n");
usage();
return 1;
}
if ((do_set || do_clear) && (raw || ascii)) {
fprintf(stderr, "'--set' cannot be used with either '--ascii' or "
"'--raw'\n");
usage();
return 1;
}
sg_fd = open(device_name, O_RDWR | O_NONBLOCK);
if (sg_fd < 0) {
fprintf(stderr, ME "open error: %s: ", device_name);
perror("");
return 1;
}
memset(rdi_buff, 0x0, sizeof(rdi_buff));
if (do_set || do_clear) {
if (do_set) {
res = fread(rdi_buff, 1, REPORT_DEV_ID_SANITY_LEN + 2, stdin);
if (res <= 0) {
fprintf(stderr, "no data read from stdin; to clear "
"identifier use '--clear' instead\n");
goto err_out;
} else if (res > REPORT_DEV_ID_SANITY_LEN) {
fprintf(stderr, "SPC-3 limits identifier length to 512 "
"bytes\n");
goto err_out;
}
di_len = res;
res = sg_ll_set_dev_id(sg_fd, rdi_buff, di_len, 1, verbose);
} else /* do_clear */
res = sg_ll_set_dev_id(sg_fd, rdi_buff, 0, 1, verbose);
if (0 == res)
ret = 0;
else {
if (SG_LIB_CAT_INVALID_OP == res)
fprintf(stderr, "Set Device Identifier command not "
"supported\n");
else if (SG_LIB_CAT_ILLEGAL_REQ == res)
fprintf(stderr, "bad field in Set Device Identifier "
"cdb\n");
else {
fprintf(stderr, "Set Device Identifier command failed\n");
if (0 == verbose)
fprintf(stderr, " try '-v' for more information\n");
}
}
} else { /* do report device identifier */
res = sg_ll_report_dev_id(sg_fd, rdi_buff, 4, 1, verbose);
if (0 == res) {
di_len = (rdi_buff[0] << 24) + (rdi_buff[1] << 16) +
(rdi_buff[2] << 8) + rdi_buff[3];
if (! raw)
printf("Reported device identifier length = %d\n", di_len);
if (0 == di_len) {
fprintf(stderr, " This implies the device has an empty "
"identifier\n");
goto err_out;
}
if (di_len > REPORT_DEV_ID_SANITY_LEN) {
fprintf(stderr, " That length (%d) seems too long for a "
"device identifier\n", di_len);
goto err_out;
}
ucp = rdi_buff;
res = sg_ll_report_dev_id(sg_fd, ucp, di_len + 4, 1, verbose);
if (0 == res) {
di_len = (ucp[0] << 24) + (ucp[1] << 16) + (ucp[2] << 8) +
ucp[3];
if (raw) {
if (di_len > 0)
n = fwrite(ucp + 4, 1, di_len, stdout);
} else {
printf("Device identifier:\n");
if (di_len > 0) {
if (ascii)
printf("%.*s\n", di_len, (const char *)ucp + 4);
else
dStrHex((const char *)ucp + 4, di_len, 0);
}
}
ret = 0;
}
}
if (0 != res) {
if (SG_LIB_CAT_INVALID_OP == res)
fprintf(stderr, "Report Device Identifier command not "
"supported\n");
else if (SG_LIB_CAT_ILLEGAL_REQ == res)
fprintf(stderr, "bad field in Report Device Identifier "
"cdb\n");
else {
fprintf(stderr, "Report Device Identifier command failed\n");
if (0 == verbose)
fprintf(stderr, " try '-v' for more information\n");
}
}
}
err_out:
res = close(sg_fd);
if (res < 0) {
perror(ME "close error");
return 1;
}
return ret;
}
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