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Re: bin/44246: enhance mv to work better with xargs

On Mon, 14 Jan 2013, James K. Lowden wrote:

On Mon, 14 Jan 2013 13:15:28 -0800 (PST)
Paul Goyette <> wrote:

        $ echo * newdir | xargs mv


It only works while the expansion of * is shorter than xargs's
maximum command length.  Once you exceed that limit, you fail.

Hmm?  xargs has no internal "maximum command length" afaik.  xargs
reads from stdin and invokes mv with execve(2).  execve may fail with
E2BIG, but not because of how the xargs command line is formed.

Yeah, I misphrased.

As Christos pointed out, the breakage occurs when the command line used to invoke 'mv' exceeds ARG_MAX - 4096 (or some other value provided to xargs with the -s flag).

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