Changes to xargs option (-L/-n) handling by the Austin Group

[James Youngman]

I have not been able to determine the impact of this change on GNU
findutils, as I'm away and don't have easy access to my development
system.  I should be able to look at this next week, but if anyone
else wants to have a think about what we shoudl do about this in the
meantime, please feel free!

James.

----- Forwarded message from Andrew Josey <address@hidden> -----
[...]
XCU ERN 68  xargs Accept as marked below

 (Note: "{XSI}" in the following means start XSI shading; "{/XSI}"
 means stop XSI shading.)

 Change the SYNOPSIS on P1058, L40762-40763 from:
   xargs [-t] [-p]] [-E eofstr] {XSI}[-I replstr] [-L number]{/XSI}
     [-n number [-x]] [-s size] [utility [argument...]]
 to:
   xargs [-ptx] [-E eofstr] [-s size] [{XSI}-I replstr |
     -L number | {/XSI}-n number] [utility [argument...]]

 Delete the last sentence in the description of the -L option on
 P1059, L40809-40810:
   The -L and -n options are mutually-exclusive; the last one
   specified shall take effect.

 Change the description of the -x option on P1059, L40834-40836 from:
   Terminate if a command line containing number arguments (see the
   -n option above) {XSI}or number lines (see the -L option above) {/XSI}
   will not fit in the implied or specified size (see the -s option
   above).
 to:
   Terminate if a constructed command line will not fit in the
   implied or specified size (see the -s option above).

Add to rationale.
The -I, -L, and -n options are mutually-exclusive.
Some implementations use the last one specified if more than
one is given on a command line , other implementations treat combinations
of the options in different ways.
[..]
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