xargs使用需要注意的地方

[root@SVNServer test]# man xargs
XARGS(1) XARGS(1)

NAME
       xargs - build and execute command lines from standard input

SYNOPSIS
       xargs [-0prtx] [-E  eof-str] [-e[eof-str]] [--eof[=eof-str]] [--null] [-d  delimiter]
       [--delimiter  delimiter] [-I   replace-str] [-i[replace-str]] [--replace[=replace-str]]
       [-l[max-lines]] [-L max-lines] [--max-lines[=max-lines]] [-n max-args] [--max-args=max-args]
       [-s    max-chars] [--max-chars=max-chars] [-P    max-procs] [--max-procs=max-procs]
       [--interactive] [--verbose] [--exit] [--no-run-if-empty] [--arg-file=file] [--show-limits]
       [--version] [--help] [command [initial-arguments]]

DESCRIPTION
       This manual page documents the GNU version of xargs. xargs reads items  from  the  standard
       input, delimited  by blanks (which can be protected with double or single quotes or a back-
       slash) or newlines, and executes the command (default is /bin/echo) one or more  times  with
       any  initial-arguments followed by items read from standard input. Blank lines on the stan-
       dard input are ignored.

       Because Unix filenames can contain blanks and newlines, this default  behaviour  is  often
       problematic; filenames containing blanks and/or newlines are incorrectly processed by xargs.
       In these situations it is better to use the -0 option, which prevents such problems. When
       using this option you  will  need to ensure that the program which produces the input for
       xargs also uses a null character as a separator. If that program is GNU find for example,
       the -print0 option does this for you.

       If any  invocation of the command exits with a status of 255, xargs will stop immediately
       without reading any further input. An error message is issued on stderr when this happens.

也就是说
linux文件名有的可能包含空格的 比如创建一个文件 touch a\ b.txt  ，这样的话，会生成一个带空格的文件名，
在使用的时候用args处理时候，xargs会默认使用空格作为分隔，认为是a文件和 b.txt这两个文件，所以会造成误操作的情况，官方给出的处理方法是在 处理的时候 加上-0 ，将'\0'作为分隔符，这样做的前提是需要保证xargs的输入源中在最后的时候才能含有null字符，中间不能含有。因此在跟find命令结合使用的时候，需要在find命令的后面添加  -print0 参数而不是-print.
此为操作隐患，需要注意

另外看下一find的参数描述

        -print True; print  the  full file name on the standard output, followed by a newline. If
              you are piping the output of find into another program and there is the faintest pos-
              sibility that the files which you are searching for might contain a newline, then you
              should seriously consider using the -print0 option instead of -print. See  the
              UNUSUAL  FILENAMES  section for information about how unusual characters in filenames
              are handled.

       -print0
              True; print the full file name on the standard output, followed by a  null  character
              (instead of the  newline  character that -print uses). This allows file names that
              contain newlines or other types of white space to be correctly  interpreted  by  pro-
              grams  that  process  the  find  output. This option corresponds to the -0 option of
              xargs.

    因此在处理的时候要额外的注意！