[PATCH] dd fsync support

[Denys Vlasenko]

On Wednesday 02 April 2008 22:03, James Simmons wrote:
> Support to physically write output file data before finishing.
> 
> Index: dd.c
> ===================================================================
> --- dd.c	(revision 21619)
> +++ dd.c	(working copy)
> @@ -87,6 +87,7 @@
>  		FLAG_NOTRUNC = 1 << 2,
>  		FLAG_TWOBUFS = 1 << 3,
>  		FLAG_COUNT   = 1 << 4,
> +		FLAG_FSYNC   = 1 << 5,
>  	};
>  	static const char keywords[] ALIGN1 =
>  		"bs=\0""count=\0""seek=\0""skip=\0""if=\0""of=\0"
> @@ -108,6 +109,7 @@
>  		OP_conv_notrunc,
>  		OP_conv_sync,
>  		OP_conv_noerror,
> +		OP_conv_fsync,
>  #endif
>  	};
>  	int exitcode = EXIT_FAILURE;
> @@ -185,6 +187,8 @@
>  					flags |= FLAG_SYNC;
>  				if (what == OP_conv_noerror)
>  					flags |= FLAG_NOERROR;
> +				if (what == OP_conv_fsync)
> +					flags |= FLAG_FSYNC;
>  				if (!key) /* no ',' left, so this was the last specifier */
>  					break;
>  				arg = key + 1; /* skip this keyword and ',' */
> @@ -304,6 +308,11 @@
>  			}
>  		} else if (write_and_stats(ibuf, n, obs, outfile))
>  			goto out_status;
> +
> +		if (flags & FLAG_FSYNC) {
> +			if (fsync(ofd) < 0)
> +				goto die_outfile;
> +		}
>  	}
>  
>  	if (ENABLE_FEATURE_DD_IBS_OBS && oc) {


Seems like the string "fsync\0" is not added by this patch...

I fixed it up. Applied to current svn. Thanks.
--
vda