[bug #58149] Whitespace parsing differs with and without -i

URL:
  <https://savannah.gnu.org/bugs/?58149>

                 Summary: Whitespace parsing differs with and without -i
                 Project: findutils
            Submitted by: None
            Submitted on: Thu 09 Apr 2020 05:55:59 PM UTC
                Category: xargs
                Severity: 3 - Normal
              Item Group: Wrong result
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Ryan Moore
        Originator Email: [email protected]
             Open/Closed: Open
                 Release: 4.7.0
         Discussion Lock: Any
           Fixed Release: None

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Details:

I would expect this to use -n1 to separate the whitespace-delimited parameters
"a" and "b" and "c" to print 3 separate lines:


root@rmoore:~# echo "a b c" | xargs -n1 -i{} echo foo {}
foo a b c


If I manually specify a space as the delimiter, it works as expected (and
gives an extra CR with the last line, since it's now "c\n"):


root@rmoore:~# echo "a b c" | xargs -d\  -n1 -i{} echo foo {}
foo a
foo b
foo c




If I run without -I{} as a substitution, it works as expected (and prints {}
explicitly):

root@rmoore:~# echo "a b c" | xargs -n1 echo foo {}
foo {} a
foo {} b
foo {} c



Version info, from Ubuntu 16.04 (also confirmed on 18.04):

root@rmoore:~# xargs --version
xargs (GNU findutils) 4.7.0-git
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Eric B. Decker, James Youngman, and Kevin Dalley.






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