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.

Drop -D_INCOMPLETE_XOPEN_C063 from dd(1)

branches: 1.18.16;
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: 1.17.12;
let the standard rules deal with librumpclient

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: 1.15.4;
Remove the rif/rof options and add rump.dd. This makes usage
consistent with other rump clients. Copying between kernels is
done using the host pipe, e.g.:

dd if=foo rof=bar skip=1 seek=1 => dd if=foo skip=1 | rump.dd of=bar seek=1

Also, the pipe idiom extends to copying between different rump
kernels, e.g.:

env RUMP_SERVER=unix://srv1 rump.dd if=thefile \
| env RUMP_SERVER=unix://srv2 rump.dd of=thefile

Pipe approach suggested by yamt (thanks!)

branches: 1.14.2;
extra crunchgen hoops

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).

Convert to using raise_default_signal(3).

branches: 1.11.10;
sprinkle a little const, and now everything compiles with WARNS=3

convert to using strsuftoll(3) from libc

.ifdef SMALLPROG, compile with -DNO_CONV and don't compile in conv_tab.o

- 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 *")

Remove WARNS=1 from all the subdirectory Makefiles, and add it to Makefile.inc
now that all /bin has been cleaned.

Fix compiler warnings.
Add WARNS=1

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