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CVS log for src/bin/dd/dd.c

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Default branch: MAIN
Current tag: pgoyette-localcount-20160726


Revision 1.50 / (download) - annotate - [select for diffs], Wed Mar 18 13:23:49 2015 UTC (9 years ago) by manu
Branch: MAIN
CVS Tags: pgoyette-localcount-base, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount
Changes since 1.49: +24 -4 lines
Diff to previous 1.49 (colored)

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

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