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Mini Shell
Mini Shell
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sg_lib.h"
#include "sg_pt.h"
/* This is a simple program executing a SCSI INQUIRY command and a
TEST UNIT READY command using the SCSI generic pass through
interface. This allows this example program to be ported to
OSes other than linux.
* Copyright (C) 2006-20018 D. Gilbert
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
Invocation: sg_simple5 [-x] <scsi_device>
Version 1.03 (20180220)
*/
#define INQ_REPLY_LEN 96
#define INQ_CMD_LEN 6
#define TUR_CMD_LEN 6
#define CMD_TIMEOUT_SECS 60
int main(int argc, char * argv[])
{
int sg_fd, k, ok, dsize, res, duration, resid, cat, got, slen;
uint8_t inq_cdb [INQ_CMD_LEN] =
{0x12, 0, 0, 0, INQ_REPLY_LEN, 0};
uint8_t tur_cdb [TUR_CMD_LEN] =
{0x00, 0, 0, 0, 0, 0};
uint8_t inqBuff[INQ_REPLY_LEN];
char * file_name = 0;
char b[512];
uint8_t sense_b[32];
int verbose = 0;
struct sg_pt_base * ptvp;
for (k = 1; k < argc; ++k) {
if (0 == strcmp("-v", argv[k]))
verbose = 1;
else if (0 == strcmp("-vv", argv[k]))
verbose = 2;
else if (0 == strcmp("-vvv", argv[k]))
verbose = 3;
else if (*argv[k] == '-') {
printf("Unrecognized switch: %s\n", argv[k]);
file_name = 0;
break;
}
else if (0 == file_name)
file_name = argv[k];
else {
printf("too many arguments\n");
file_name = 0;
break;
}
}
if (0 == file_name) {
printf("Usage: 'sg_simple5 [-v|-vv|-vvv] <device>'\n");
return 1;
}
sg_fd = scsi_pt_open_device(file_name, 1 /* ro */, 0);
/* N.B. An access mode of O_RDWR is required for some SCSI commands */
if (sg_fd < 0) {
fprintf(stderr, "error opening file: %s: %s\n",
file_name, safe_strerror(-sg_fd));
return 1;
}
dsize = sizeof(inqBuff);
ok = 0;
ptvp = construct_scsi_pt_obj(); /* one object per command */
if (NULL == ptvp) {
fprintf(stderr, "sg_simple5: out of memory\n");
return -1;
}
set_scsi_pt_cdb(ptvp, inq_cdb, sizeof(inq_cdb));
set_scsi_pt_sense(ptvp, sense_b, sizeof(sense_b));
set_scsi_pt_data_in(ptvp, inqBuff, dsize);
res = do_scsi_pt(ptvp, sg_fd, CMD_TIMEOUT_SECS, verbose);
if (res < 0) {
fprintf(stderr, " pass through os error: %s\n",
safe_strerror(-res));
goto finish_inq;
} else if (SCSI_PT_DO_BAD_PARAMS == res) {
fprintf(stderr, " bad pass through setup\n");
goto finish_inq;
} else if (SCSI_PT_DO_TIMEOUT == res) {
fprintf(stderr, " pass through timeout\n");
goto finish_inq;
}
if ((verbose > 1) && ((duration = get_scsi_pt_duration_ms(ptvp)) >= 0))
fprintf(stderr, " duration=%d ms\n", duration);
resid = get_scsi_pt_resid(ptvp);
switch ((cat = get_scsi_pt_result_category(ptvp))) {
case SCSI_PT_RESULT_GOOD:
got = dsize - resid;
if (verbose && (resid > 0))
fprintf(stderr, " requested %d bytes but "
"got %d bytes)\n", dsize, got);
break;
case SCSI_PT_RESULT_STATUS: /* other than GOOD and CHECK CONDITION */
if (verbose) {
sg_get_scsi_status_str(get_scsi_pt_status_response(ptvp),
sizeof(b), b);
fprintf(stderr, " scsi status: %s\n", b);
}
goto finish_inq;
case SCSI_PT_RESULT_SENSE:
slen = get_scsi_pt_sense_len(ptvp);
if (verbose) {
sg_get_sense_str("", sense_b, slen, (verbose > 1),
sizeof(b), b);
fprintf(stderr, "%s", b);
}
if (verbose && (resid > 0)) {
got = dsize - resid;
if ((verbose) || (got > 0))
fprintf(stderr, " requested %d bytes but "
"got %d bytes\n", dsize, got);
}
goto finish_inq;
case SCSI_PT_RESULT_TRANSPORT_ERR:
if (verbose) {
get_scsi_pt_transport_err_str(ptvp, sizeof(b), b);
fprintf(stderr, " transport: %s", b);
}
goto finish_inq;
case SCSI_PT_RESULT_OS_ERR:
if (verbose) {
get_scsi_pt_os_err_str(ptvp, sizeof(b), b);
fprintf(stderr, " os: %s", b);
}
goto finish_inq;
default:
fprintf(stderr, " unknown pass through result "
"category (%d)\n", cat);
goto finish_inq;
}
ok = 1;
finish_inq:
destruct_scsi_pt_obj(ptvp);
if (ok) { /* output result if it is available */
char * p = (char *)inqBuff;
printf("Some of the INQUIRY command's results:\n");
printf(" %.8s %.16s %.4s\n", p + 8, p + 16, p + 32);
}
ok = 0;
/* Now prepare TEST UNIT READY command */
ptvp = construct_scsi_pt_obj(); /* one object per command */
if (NULL == ptvp) {
fprintf(stderr, "sg_simple5: out of memory\n");
return -1;
}
set_scsi_pt_cdb(ptvp, tur_cdb, sizeof(tur_cdb));
set_scsi_pt_sense(ptvp, sense_b, sizeof(sense_b));
/* no data in or out */
res = do_scsi_pt(ptvp, sg_fd, CMD_TIMEOUT_SECS, verbose);
if (res < 0) {
fprintf(stderr, " pass through os error: %s\n",
safe_strerror(-res));
goto finish_inq;
} else if (SCSI_PT_DO_BAD_PARAMS == res) {
fprintf(stderr, " bad pass through setup\n");
goto finish_inq;
} else if (SCSI_PT_DO_TIMEOUT == res) {
fprintf(stderr, " pass through timeout\n");
goto finish_inq;
}
if ((verbose > 1) && ((duration = get_scsi_pt_duration_ms(ptvp)) >= 0))
fprintf(stderr, " duration=%d ms\n", duration);
resid = get_scsi_pt_resid(ptvp);
switch ((cat = get_scsi_pt_result_category(ptvp))) {
case SCSI_PT_RESULT_GOOD:
break;
case SCSI_PT_RESULT_STATUS: /* other than GOOD and CHECK CONDITION */
if (verbose) {
sg_get_scsi_status_str(get_scsi_pt_status_response(ptvp),
sizeof(b), b);
fprintf(stderr, " scsi status: %s\n", b);
}
goto finish_tur;
case SCSI_PT_RESULT_SENSE:
slen = get_scsi_pt_sense_len(ptvp);
if (verbose) {
sg_get_sense_str("", sense_b, slen, (verbose > 1),
sizeof(b), b);
fprintf(stderr, "%s", b);
}
goto finish_tur;
case SCSI_PT_RESULT_TRANSPORT_ERR:
if (verbose) {
get_scsi_pt_transport_err_str(ptvp, sizeof(b), b);
fprintf(stderr, " transport: %s", b);
}
goto finish_tur;
case SCSI_PT_RESULT_OS_ERR:
if (verbose) {
get_scsi_pt_os_err_str(ptvp, sizeof(b), b);
fprintf(stderr, " os: %s", b);
}
goto finish_tur;
default:
fprintf(stderr, " unknown pass through result "
"category (%d)\n", cat);
goto finish_tur;
}
ok = 1;
finish_tur:
destruct_scsi_pt_obj(ptvp);
if (ok)
printf("Test Unit Ready successful so unit is ready!\n");
else
printf("Test Unit Ready failed so unit may _not_ be ready!\n");
scsi_pt_close_device(sg_fd);
return 0;
}
Zerion Mini Shell 1.0