Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Make dd's signal handler async safe.

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

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

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)

Consistently use __FBSDID

o __P has been reoved
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)

Allow negative seek offsets for files that can be seeked upon. It
makes dd(1) a more complete "filter", even if this functionality is
limited to seekable streams.

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.

Make count=0 set cpy_cnt to -1, which is slight overloading, but makes
what I was trying to do work much better (ie at all. I could have sworn
it was working...) Fix a SEEK_SET to be SEEK_CUR, and make Bruce's
lseek() test work correctly.

Even more dd(1) cleanups! Thanks to Bruce for staying on my case until
we're done (not yet!) :)

ISDISK -> ISSEEK

Allow a device type of D_DISK or D_MEM to be ISSEEK.

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.

Make a bit more headway with dd's argument parsing, etc. get_bsz() is
renamed get_num() since it's not just about block sizes. skip and
seek can be any offset, including negative, now. Some style bogons are fixed.

$Id$ -> $FreeBSD$

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

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

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.

Restore Lite-2 sccsid. Restore include of sys/types.h.

Correct use of .Nm and other cosmetics. Add rcsid. Remove unused #inc.

Fixed overflow for attempts to seek to offsets > ULONG_MAX. See the
OpenBSD version for more complete fixes. E.g., to seek to offsets >
INT_MAX using a block size of 1, block numbers need to be off_t's
instead of u_long's.

Revert $FreeBSD$ to $Id$

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.

-Wall cleaning.

Added $Id$

This commit was generated by cvs2svn to compensate for changes in r1556,
which included commits to RCS files with non-trunk default branches.

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