Re: [PATCH] Re: iflag/oflag for dd(1)

[christos%zoulas.com@localhost (Christos Zoulas)]

On Mar 17,  3:32pm, manu%netbsd.org@localhost (Emmanuel Dreyfus) wrote:
-- Subject: Re: [PATCH] Re: iflag/oflag for dd(1)

| On Tue, Mar 17, 2015 at 03:04:12PM +0000, Christos Zoulas wrote:
| > Some of the flags don't make sense:
| > (O_CREAT,O_RDONLY,O_RDWR,O_TRUNC,O_WRONLY,O_APPEND)
| 
| Don't they? 
| - O_CREAT: you may want dd to work only if the file xists
| - O_RDWR: you may want to specify it for the input file
| - O_TRUNC, O_APPEND: for testing purpose?

O_CREAT:
	It is already in the oflag, there is no way to clear it.
	It does not make a lot of sense for the iflag
O_RDWR:
	It is already in the oflag, there is no way to clear it.
	It does not make a lot of sense for the iflag

O_TRUNC:
	For oflag it will lead to confusion with conv=notrunc and no way
	to clear it. Two ways to do the same thing.
	It does not make a lot of sense for the iflag

O_APPEND:
	This is useful for oflag I guess, not for iflag...


christos