freebsd-skq/bin/dd/misc.c
Edward Tomasz Napierala 75e5511214 Add speed limit to dd(1). This is useful for testing RCTL disk io limits
(when they actually get committed, that is), and might also come in handy
in other situations.

Reviewed by:	wblock@ (man page)
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
2016-02-28 10:27:12 +00:00

119 lines
3.3 KiB
C

/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego and Lance
* Visser of Convex Computer Corporation.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)misc.c 8.3 (Berkeley) 4/2/94";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <inttypes.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "dd.h"
#include "extern.h"
double
secs_elapsed(void)
{
struct timespec end, ts_res;
double secs, res;
if (clock_gettime(CLOCK_MONOTONIC, &end))
err(1, "clock_gettime");
if (clock_getres(CLOCK_MONOTONIC, &ts_res))
err(1, "clock_getres");
secs = (end.tv_sec - st.start.tv_sec) + \
(end.tv_nsec - st.start.tv_nsec) * 1e-9;
res = ts_res.tv_sec + ts_res.tv_nsec * 1e-9;
if (secs < res)
secs = res;
return (secs);
}
void
summary(void)
{
double secs;
if (ddflags & C_NOINFO)
return;
secs = secs_elapsed();
(void)fprintf(stderr,
"%ju+%ju records in\n%ju+%ju records out\n",
st.in_full, st.in_part, st.out_full, st.out_part);
if (st.swab)
(void)fprintf(stderr, "%ju odd length swab %s\n",
st.swab, (st.swab == 1) ? "block" : "blocks");
if (st.trunc)
(void)fprintf(stderr, "%ju truncated %s\n",
st.trunc, (st.trunc == 1) ? "block" : "blocks");
if (!(ddflags & C_NOXFER)) {
(void)fprintf(stderr,
"%ju bytes transferred in %.6f secs (%.0f bytes/sec)\n",
st.bytes, secs, st.bytes / secs);
}
need_summary = 0;
}
/* ARGSUSED */
void
siginfo_handler(int signo __unused)
{
need_summary = 1;
}
/* ARGSUSED */
void
terminate(int sig)
{
summary();
_exit(sig == 0 ? 0 : 1);
}