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#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include "sg_lib.h"
#include "sg_cmds.h"
/* This program sends a user specified number of TEST UNIT READY commands
to the given sg device. Since TUR is a simple command involing no
data transfer (and no REQUEST SENSE command iff the unit is ready)
then this can be used for timing per SCSI command overheads.
* Copyright (C) 2000-2006 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.
*/
static char * version_str = "3.20 20060623";
static void usage()
{
printf("Usage: 'sg_turs [-n=<num_of_test_unit_readys>] [-p] [-t] "
"[-v] [-V]\n"
" <scsi_device>'\n"
" where '-n=<num>' number of test_unit_ready commands "
"(def: 1)\n"
" '-p' outputs progress indication (percentage) "
"if available\n"
" '-t' outputs total duration and commands per "
"second\n"
" '-v' increase verbosity\n"
" '-V' print version string then exit\n\n"
"Performs a TEST UNIT READY SCSI command (or many of them)\n");
}
int main(int argc, char * argv[])
{
int sg_fd, k, plen, jmp_out, res;
const char * file_name = 0;
const char * cp;
int num_turs = 1;
int do_progress = 0;
int progress;
int num_errs = 0;
int do_time = 0;
int verbose = 0;
int reported = 0;
int ret = 0;
struct timeval start_tm, end_tm;
for (k = 1; k < argc; ++k) {
cp = argv[k];
plen = strlen(cp);
if (plen <= 0)
continue;
if ('-' == *cp) {
for (--plen, ++cp, jmp_out = 0; plen > 0; --plen, ++cp) {
switch (*cp) {
case 'p':
do_progress = 1;
break;
case 't':
do_time = 1;
break;
case 'v':
++verbose;
break;
case 'V':
fprintf(stderr, "Version string: %s\n", version_str);
exit(0);
case '?':
usage();
return 0;
default:
jmp_out = 1;
break;
}
if (jmp_out)
break;
}
if (plen <= 0)
continue;
if (0 == strncmp("n=", cp, 2)) {
num_turs = sg_get_num(cp + 2);
if (num_turs <= 0) {
printf("Couldn't decode number after 'n=' option\n");
usage();
return SG_LIB_SYNTAX_ERROR;
}
} else if (jmp_out) {
fprintf(stderr, "Unrecognized option: %s\n", cp);
usage();
return SG_LIB_SYNTAX_ERROR;
}
} else if (0 == file_name)
file_name = cp;
else {
fprintf(stderr, "too many arguments, got: %s, not expecting: "
"%s\n", file_name, cp);
usage();
return SG_LIB_SYNTAX_ERROR;
}
}
if (0 == file_name) {
fprintf(stderr, "No <scsi_device> argument given\n");
usage();
return SG_LIB_SYNTAX_ERROR;
}
if ((sg_fd = sg_cmds_open_device(file_name, 1 /* ro */, verbose)) < 0) {
fprintf(stderr, "sg_turs: error opening file: %s: %s\n",
file_name, safe_strerror(-sg_fd));
return SG_LIB_FILE_ERROR;
}
if (do_progress) {
for (k = 0; k < num_turs; ++k) {
if (k > 0)
sleep(30);
progress = -1;
res = sg_ll_test_unit_ready_progress(sg_fd, k, &progress,
((1 == num_turs) ? 1 : 0), verbose);
if (progress < 0) {
ret = res;
break;
} else
printf("Progress indication: %d%% done\n",
(progress * 100) / 65536);
}
if (num_turs > 1)
printf("Completed %d Test Unit Ready commands\n",
((k < num_turs) ? k + 1 : k));
} else {
if (do_time) {
start_tm.tv_sec = 0;
start_tm.tv_usec = 0;
gettimeofday(&start_tm, NULL);
}
for (k = 0; k < num_turs; ++k) {
res = sg_ll_test_unit_ready(sg_fd, k, 0, verbose);
if (res) {
++num_errs;
ret = res;
if ((1 == num_turs) && (SG_LIB_CAT_NOT_READY == res)) {
printf("device not ready\n");
reported = 1;
break;
}
}
}
if ((do_time) && (start_tm.tv_sec || start_tm.tv_usec)) {
struct timeval res_tm;
double a, b;
gettimeofday(&end_tm, NULL);
res_tm.tv_sec = end_tm.tv_sec - start_tm.tv_sec;
res_tm.tv_usec = end_tm.tv_usec - start_tm.tv_usec;
if (res_tm.tv_usec < 0) {
--res_tm.tv_sec;
res_tm.tv_usec += 1000000;
}
a = res_tm.tv_sec;
a += (0.000001 * res_tm.tv_usec);
b = (double)num_turs;
printf("time to perform commands was %d.%06d secs",
(int)res_tm.tv_sec, (int)res_tm.tv_usec);
if (a > 0.00001)
printf("; %.2f operations/sec\n", b / a);
else
printf("\n");
}
if (((num_turs > 1) || (num_errs > 0)) && (! reported))
printf("Completed %d Test Unit Ready commands with %d errors\n",
num_turs, num_errs);
}
sg_cmds_close_device(sg_fd);
return (ret >= 0) ? ret : SG_LIB_CAT_OTHER;
}
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