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* Add speed limit to dd(1). This is useful for testing RCTL disk io limitstrasz2016-02-281-5/+16
| | | | | | | | | (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
* Incorporate feedback from bde and jilles regarding r265472 to dd(1).asomers2014-05-081-9/+9
| | | | | | | | | | | | | | | * Don't use sysexits.h. Just exit 1 on error and 0 otherwise. * Don't sacrifice precision by converting the output of clock_gettime() to a double and then comparing the results. Instead, subtract the values of the two clock_gettime() calls, then convert to double. * Don't use CLOCK_MONOTONIC_PRECISE. It's an unportable synonym for CLOCK_MONOTONIC. * Use more appropriate names for some local variables. * In the summary message, round elapsed time to the nearest microsecond. Reported by: bde, jilles MFC after: 3 days X-MFC-With: 265472
* dd(1) uses gettimeofday(2) to compute the throughput statistics. However,asomers2014-05-061-8/+14
| | | | | | | | | | | | | | | gettimeofday returns the system clock, which may jump forward or back, especially if NTP is in use. If the time jumps backwards, then dd will see negative elapsed time, round it up to 1usec, and print an absurdly fast transfer rate. The solution is to use clock_gettime(2) with CLOCK_MONOTONIC_PRECISE as the clock_id. That clock advances steadily, regardless of changes to the system clock. Reviewed by: delphij MFC after: 3 days Sponsored by: Spectra Logic
* Implement GNU's extension of 'status' operand. The GNU syntax isdelphij2014-04-031-3/+8
| | | | | | | | | | | | borrowed where syntax status=noxfer means no transfer statistics and status=none means no status information at all. This feature is useful because the statistics information can sometimes be annoying, and redirecting stderr to /dev/null would mean error messages also gets silenced. Obtained from: OpenBSD MFC after: 2 weeks
* Make dd's signal handler async safe.eadler2013-05-101-18/+10
| | | | | | | | | PR: bin/75258 Submitted by: "Oleg V. Nauman" <oleg@reis.zp.ua> Arrival Date: Sun Dec 19 14:50:21 GMT 2004 Reviewed by: mjg, jhb Reviewed by: jilles (earlier version) MFC after: 1 week
* Rework all non-contributed files that use `struct timezone'.ed2012-09-011-1/+1
| | | | | | | | | | | | | | This structure is not part of POSIX. According to POSIX, gettimeofday() has the following prototype: int gettimeofday(struct timeval *restrict tp, void *restrict tzp); Also, POSIX states that gettimeofday() shall return 0 (as long as tzp is not used). Remove dead error handling code. Also use NULL for a nul-pointer instead of integer 0. While there, change all pieces of code that only use tv_sec to use time(3), as this provides less overhead.
* Remove clause 3 from the UCB licenses.markm2004-04-061-4/+0
| | | | OK'ed by: imp, core
* WARNS=4 fixes. This would be WARNS=9 if we were -std=99 instead ofmarkm2003-02-271-4/+5
| | | | | | -ansi, due to 'long long'. Reviewed by: green (slightly earlier version)
* Consistently use __FBSDIDobrien2002-06-301-2/+2
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* Replace <strings.h> with <string.h>. No functions from the former arekeramida2002-06-091-1/+1
| | | | | | | used in this file, and strlen() needs to be prototyped by the latter, for this to compile without warnings. Reviewed by: mike
* o __P has been reovedimp2002-02-021-5/+3
| | | | | | | | | | | o Old-style K&R declarations have been converted to new C89 style o register has been removed o prototype for main() has been removed (gcc3 makes it an error) o int main(int argc, char *argv[]) is the preferred main definition. o Attempt to not break style(9) conformance for declarations more than they already are. Approved by: arch@, new style(9)
* Use __unused for non-used variables.green2001-06-291-1/+1
| | | | Submitted by: Mike Barcroft <mike@q9media.com>
* Previous commit broke dd(1)'s I/O summary when it's terminated by add2001-06-251-0/+1
| | | | | | | | | signal. Fix it by adding an explicit call to summary() in terminate() (it was previously called implicitly by exit() because summary() was registered with atexit()). summary() is supposed to be signal-safe-- it handles SIGINFO almost exclusively--so this should be safe. Submitted by: bde
* Don't call exit(3) from a signal handler.dd2001-06-241-2/+1
| | | | Obtained from: OpenBSD
* Add more headers that are required with -fno-builtin (stdlib and strings)des2001-06-191-0/+2
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* $Id$ -> $FreeBSD$peter1999-08-271-1/+1
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* Miscellaneous dd(1) changes: mainly fixing variable types (size_t, ssize_t,green1999-06-191-4/+4
| | | | | off_t, int, u_int64_t, etc.). dd(1) should now work properly with REALLY big amounts of data.
* Fixed printf format errors.bde1998-12-071-4/+4
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* Restore Lite-2 sccsid. Restore include of sys/types.h.charnier1998-05-131-2/+3
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* Correct use of .Nm and other cosmetics. Add rcsid. Remove unused #inc.charnier1998-05-061-7/+4
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* Exit with a nonzero status if we get killed by a SIGINT. POSIX.2bde1998-02-241-4/+5
| | | | | | | | | specifies exiting with a zero status if the file was copied successfully, and with a nonzero status if an error occurred. We are too sloppy to tell if the file was copied successfully when we get killed by a SIGINT, but it is unlikely to have been. Added a comment about related sloppiness (calling exit() from a signal handler).
* Fix printing for bytes read > 4G.asami1998-02-111-2/+2
| | | | Reviewed by: bde
* It's more portable to use <errno.h> than <sys/errno.h>eivind1997-12-151-2/+2
| | | | Pointed-out-by: bde (a long while ago)
* Add <sys/errno.h>eivind1997-10-091-1/+2
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* make signal handlers errno safeeivind1997-10-081-1/+3
| | | | Obtained from: OpenBSD (file rev 1.5) Theo de Raadt <deraadt@openbsd.org>
* Revert $FreeBSD$ to $Id$peter1997-02-221-1/+1
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* Make the long-awaited change from $Id$ to $FreeBSD$jkh1997-01-141-1/+1
| | | | | | | | This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
* -Wall cleaning.steve1996-12-141-2/+2
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* Bruce says: "You have been programming in the kernel for too long :-)."phk1996-11-131-25/+10
| | | | | | | | | | | | | | | | | and he's right ... I forgot about this floating point stuff you can use in user-land :-) Increase precision of duration to microseconds. No heuristics to avoid overflow in calculation needed - just depend on DBL_MAX being a bit larger than LONG_MAX. Use double instead of `struct timeval' in dd.h so that everything doesn't have to include <sys/time.h>. Fixed style bugs in recent and old FreeBSD changes. Reviewed by: phk Submitted by: bde
* Increase precision of duration to milliseconds.phk1996-11-121-8/+26
| | | | Some heuristics to avoid overflow in calculation attempted.
* Added $Id$dg1994-09-241-0/+2
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* BSD 4.4 Lite bin Sourcesrgrimes1994-05-261-0/+100
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