CVS commit: src/bin/dd

["Emmanuel Dreyfus" <manu%netbsd.org@localhost>]

Module Name:    src
Committed By:   manu
Date:           Wed Mar 18 13:23:49 UTC 2015

Modified Files:
        src/bin/dd: Makefile args.c dd.1 dd.c dd.h extern.h

Log Message:
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


To generate a diff of this commit:
cvs rdiff -u -r1.17 -r1.18 src/bin/dd/Makefile
cvs rdiff -u -r1.38 -r1.39 src/bin/dd/args.c
cvs rdiff -u -r1.25 -r1.26 src/bin/dd/dd.1
cvs rdiff -u -r1.49 -r1.50 src/bin/dd/dd.c
cvs rdiff -u -r1.15 -r1.16 src/bin/dd/dd.h
cvs rdiff -u -r1.22 -r1.23 src/bin/dd/extern.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.