find: argumento faltando para '-exec' ao usar + forma de find

Question

Eu quero executar um comando nos caminhos encontrados com o comando find e quero usar + para reduzir o número de vezes que o comando externo é iniciado.

Criticamente, o comando possui um argumento final de valor fixo. Aqui está um exemplo concreto com echo como o comando, embora no real:

mkdir blah && cd blah
touch fooA
touch fooB
find . -name 'foo*' -exec echo {} second +

Espero que isso seja impresso:

./fooA ./fooB second

mas, em vez disso, recebo o erro find: missing argument to -exec ' . I've tried all sorts of permutations to get it to work with +. Why isn't this working? It works find with the \;' variante:

find . -name 'foo*' -exec echo {} second \;
./fooB second
./fooA second

... mas não é isso que eu estou procurando.

find --version relatórios:

find (GNU findutils) 4.4.2
Copyright (C) 2007 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.
Built using GNU gnulib version e5573b1bad88bfabcda181b9e0125fb0c52b7d3b
Features enabled: D_TYPE O_NOFOLLOW(enabled) LEAF_OPTIMISATION FTS() CBO(level=0) 

Veja um trecho das man pages sobre as formas + e ; :

   -exec command ;
          Execute  command;  true  if 0 status is returned.  All following arguments to find are taken to be arguments to the command until an argument consisting of ';' is encoun‐
          tered.  The string '{}' is replaced by the current file name being processed everywhere it occurs in the arguments to the command, not  just  in  arguments  where  it  is
          alone,  as  in  some  versions of find.  Both of these constructions might need to be escaped (with a '\') or quoted to protect them from expansion by the shell.  See the
          EXAMPLES section for examples of the use of the -exec option.  The specified command is run once for each matched file.  The command is executed in  the  starting  direc‐
          tory.   There are unavoidable security problems surrounding use of the -exec action; you should use the -execdir option instead.

   -exec command {} +
          This  variant  of  the  -exec  action runs the specified command on the selected files, but the command line is built by appending each selected file name at the end; the
          total number of invocations of the command will be much less than the number of matched files.  The command line is built in much the same way that xargs builds its  com‐
          mand lines.  Only one instance of '{}' is allowed within the command.  The command is executed in the starting directory.

    

Answer 1

Não consegui encontrar uma solução com find -exec + ou find | xargs , mas o GNU Parallel pode fazer a trabalho.

mkdir blah && cd blah
touch fooA
touch fooB
find . -name 'foo*' -print0 | parallel -0 -j1 -X echo {} second

Produz:

./fooA ./fooB second

Observe que a opção -j1 limita parallel a um trabalho por vez, que é usado aqui apenas na tentativa de reproduzir o comportamento que seria esperado de find -exec + .