Commit Graph

28 Commits

Author SHA1 Message Date
Kurt Jaeger
f4cfd28bb5 bin/dd: revert 273734, as it fails on 32bit platforms
Revert: insufficient testing on 32bit platforms

PR:		191263
2014-10-27 17:39:37 +00:00
Kurt Jaeger
179eb7112b bin/dd: Fix incorrect casting of arguments
dd(1) casts many of its numeric arguments from uintmax_t to intmax_t
and back again to detect whether or not the original arguments were
negative. This caused wrong behaviour in some boundary cases:

$ dd if=/dev/zero of=/dev/null count=18446744073709551615
dd: count cannot be negative

After the fix:

$ dd if=/dev/zero of=/dev/null count=18446744073709551615
dd: count: Result too large

PR:		191263
Submitted by:	will@worrbase.com
Approved by:	cognet@
2014-10-27 11:38:17 +00:00
Alan Somers
540c78258c Incorporate feedback from bde and jilles regarding r265472 to dd(1).
* 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
2014-05-08 19:10:04 +00:00
Thomas Quinot
37f1b88ba0 Minor comment fix: dbsz is the block size as set by bs/ibs/obs,
not the size of the buffer.
2014-05-03 09:07:02 +00:00
Xin LI
413ef2a3d1 Make C_* contants fit in 32 bits again by using 4 unused bits.
Noticed by:	bde
2014-04-03 06:32:02 +00:00
Xin LI
c3f5e9c515 Implement GNU's extension of 'status' operand. The GNU syntax is
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
2014-04-03 00:55:16 +00:00
Robert Watson
e3edab4a91 Add a "fillchar" command line argument to dd(1) that permits the user
to specify an alternative padding character when using a conversion
mode, or when using noerror with sync and an input error occurs.  This
facilities reading old and error-prone media by allowing the user to
more effectively mark error blocks in the output stream.
2004-08-15 19:10:05 +00:00
Mark Murray
6195fb4102 Remove clause 3 from the UCB licenses.
OK'ed by:	imp, core
2004-04-06 20:06:54 +00:00
Bruce Evans
d493ed0f97 Fixed some style bugs (mainly unsorting and tab lossage in previous commit). 2004-03-06 08:21:32 +00:00
Poul-Henning Kamp
6a3d33ac5e Teach dd(1) about parity bits. 2004-03-05 19:35:51 +00:00
Mark Murray
7503d74f54 WARNS=4 fixes. This would be WARNS=9 if we were -std=99 instead of
-ansi, due to 'long long'.

Reviewed by:	green (slightly earlier version)
2003-02-27 18:04:54 +00:00
Mark Murray
9afa09cd0e Fix warnings inspired by lint, a commercial lint and WARNS=4. 2002-02-22 20:51:00 +00:00
Brian Feldman
c15c898eff Various cleanups are made to reduce warnings and make code prettier :)
Also, check for ftruncate() return value and die on failure, but only
try to ftruncate() when the file is a regular file.
2000-07-01 05:36:25 +00:00
Brian Feldman
7599187e0d Even more dd(1) cleanups! Thanks to Bruce for staying on my case until
we're done (not yet!) :)
1999-09-13 21:47:10 +00:00
Brian Feldman
32952d4b37 ISDISK -> ISSEEK
Allow a device type of D_DISK or D_MEM to be ISSEEK.
1999-09-12 18:56:12 +00:00
Brian Feldman
5868747254 Even more cleanups to dd(1). This is probably the culmination of the
BDEification process of dd(1). Most of the changes are from BDE's archive.
Support for negative offsets is gone again, but the case where you
lseek() onto byte -1 of something from a negative offset using seek/skip
is fixed; if you end up on -1, you won't get a false positive lseek failure.
  The biggest changes are to data types (more size_t, for instance) and
argument parsing. skip/seek on /dev/{,k}mem now occurs (instead of "read
until you reach the offset") due to mem devices now being D_DISK. Some
const things are now correctly declared as such, and the "case table"
building is better. The only thing that seems to be left to make dd(1)
everything TOG wants it to be is l10n.
1999-09-12 16:51:53 +00:00
Peter Wemm
2a4562393f $Id$ -> $FreeBSD$ 1999-08-27 23:15:48 +00:00
Brian Feldman
769e5815e3 Implement seekability for disk devices (not just regular files).
Also, fix pos_out() to do the same checks pos_in() did.

Done for:	jdp, luigi, the good of the world
1999-07-13 18:44:56 +00:00
Brian Feldman
54946e00b2 This is the second round of dd(1) changes. Some changes made/reversed by
request of Bruce. More changes may follow later. 'g' multiplier has
been added (i.e. dd seek=5g if=bigfile.) Some minor corrections were made
as well.

Noticed by: bde
1999-06-20 14:58:55 +00:00
Brian Feldman
767bc8ad79 Miscellaneous dd(1) changes: mainly fixing variable types (size_t, ssize_t,
off_t, int, u_int64_t, etc.). dd(1) should now work properly with REALLY
big amounts of data.
1999-06-19 19:49:35 +00:00
Satoshi Asami
2f719e7069 Fix printing for bytes read > 4G.
Reviewed by:	bde
1998-02-11 02:23:31 +00:00
Joerg Wunsch
4ddfeabd8f Teach dd(1) about an option to write sparse files. Can be useful for
things like diskless clients' swap files etc.

Submitted by:	pascal@zuo.dec.com (Pascal Pederiva) (ages ago, with many
						  stylistic changes by me)
1997-10-11 20:09:05 +00:00
Peter Wemm
b97fa2ef50 Revert $FreeBSD$ to $Id$ 1997-02-22 14:13:04 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
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.
1997-01-14 07:20:47 +00:00
Poul-Henning Kamp
ad66f7ee71 Bruce says: "You have been programming in the kernel for too long :-)."
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
1996-11-13 20:00:03 +00:00
Poul-Henning Kamp
77dfeccef6 Increase precision of duration to milliseconds.
Some heuristics to avoid overflow in calculation attempted.
1996-11-12 23:09:15 +00:00
David Greenman
89730b290a Added $Id$ 1994-09-24 02:59:15 +00:00
Rodney W. Grimes
4b88c807ea BSD 4.4 Lite bin Sources 1994-05-26 06:18:55 +00:00