update header too.

copy libc's swab.c into dd as dd_swab(), and remove the restrict.

our implementation was fine, but the restrict marker is problematic
as gcc 8 is now more strict about checking for restrict issues.

this is the only actual consumer of swab(3) in our tree, though,
besides the test for it. oh well.

branches: 1.23.16;
Add iflag and oflag operands to dd(1)

Like GNU dd(1) similar operands, iflag and oflag allow specifying the
O_* flags given to open(2) for the input and the output file. The values
are comma-sepratated, lower-case, O_ prefix-stripped constants documented
in open(2).

Since iflag and oflag override default values, specifying oflag means
O_CREATE is not set by default and must be specified explicitely.

Some values do not make sense (e.g.: iflag=directory) but are still used
and will raise a warning. For oflag, values rdonly, rdwr and wronly are
filtered out with a warning (dd(1) attempts open(2) with O_RDWR and
then O_WRONLY on failure).

Specifying oflag=trunc along with (seek, oseek or conv=notrunc) is
contradictory and will raise an error.

iflag and oflag are disabled if building with -DMALLPROG

branches: 1.22.20;
As suggested by Enami, rework the msgfmt logic a bit:
- error out when an unknown specifier is used. Do this in f_msgfmt(),
before dd(1) starts operation.
- allow buffer_write() to flush the internal buffer even when NULL is
passed as parameter.

Some whitespace fixes too.

Add a new command to dd(1): msgfmt. The command modifies the
output of the information summary returned by dd(1). This can be used
to specify messages in a more usable (or parseable) format like
human-readable values.

My intent is to re-use this for building image files and quick I/O
benchmarking.

Reviewed by tsutsui@ on tech-userlevel. See also
http://mail-index.netbsd.org/tech-userlevel/2010/12/03/msg004179.html

Some examples:

$ dd if=/dev/zero of=/dev/null bs=1m count=1 msgfmt=human
1+0 records in
1+0 records out
1048576 bytes (1,0 MB) transferred in 0.001 secs (1048576000 bytes/sec - 1,0 GB/sec)

$ dd if=/dev/zero of=/dev/null count=1 msgfmt='
> <speed>%E</speed>
> <time>%s</time>
> <bytes>%b</bytes>
> '
<speed>500 KB/sec</speed>
<time>0.001</time>
<bytes>512</bytes>

branches: 1.20.2;
Use __dead for the small build too

Use __dead

Add two new operands: "rif" and "rof". They operate exactly like
"if" and "of" with the exception that the communicate with a rump
kernel instead of the host kernel.

For example, to write stdout to /tmp/file.txt in a rump kernel namespace:
dd rof=/tmp/file.txt

copy /file1 to /file2 inside a rump kernel:
dd rif=/file1 rof=/file2

copy a snippet from /dev/rmd0d on the rump kernel to the host fs:
dd rif=/dev/rmd0d of=save seek=1000 count=3

Eat that, usermode OS.

(I'll document the operands one I have some manpage to refer to
for rump client use).

In "dd progress=N", let the value of N control how often
to print a "." to stderr. Previously, any non-zero
value behaved like "progress=1".

PR 24300

Approved by christos

Following private discussion with kleink@ and hubertf@ and public discussion
on tech-userlevel@, back out printescaped() functionality.
kleink: ``We sell rope.''

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22249, verified by myself.

As discusses a little while back on tech-userlevel:

If stdout is a tty, use vis(3) to print any filenames to prevent garbage
from being printed if the filename contains control- or other non-printable
characters.

While here, sprinkle some EXIT_FAILURE and NOTREACHED where appropriate.

Replace {u_,}longlong_t usage with {u,}int64_t, as the former has
"issues" and really shouldn't be used outside of the Sun XDR stuff.
Thanks again to Chuck Silvers for reminding me.

- Use u_longlong_t instead of u_quad_t, u_long, or int for various buffer sizes
- Add strsuftoull(), which parses a number into a u_longlong_t, with
multiplication support, and support for 'g' (GB) and 't' (TB) suffices.
If an error occurs, print to stderr and exit.
Based on get_blk() from args.c and strsufto*() (in other programs)
- Add strsuftoullx(), which acts as per strsuftoull() but returns the
error in the supplied buffer instead (if the returned buffer != "", an
error occurred)
- Replace get_bsz() use with strsuftoull()
- Remove (now) unnecessary argument validation
- Remove unused {f,p,s,t}_stats fields in struct IO

- ANSI KNF
- WARNS=2 (mainly converting some "char *" -> "const char *")

block siginfo during writes.

branches: 1.9.8;
Add "progress=1" switch to show a sign of life by printing a '.' for
every block written to the output file.

Fix compiler warnings.
Add WARNS=1

Re-do change to use const qualifer with conversion tables.

Fixed bug where pre-computed upper/lower case conversion tables were
used. This won't work if user selected a different locale.

Previous change (Use const qualifier with conversion tables) is broken.
(1) It won't compile, and (2) there's code in dd.c which actually
does modify (some, all, used?) conversion tables, so they can't _all_ be
const (if any can).

Use const qualifier with conversion tables

convert to new RCS id conventions.

Merge 4.4-Lite version.

Add RCS identifiers.

branches: 1.1.1;
added dd(1) from ftp.uu.net:bsd-sources; torching GNU dd