gistfile1.txt

XARGS(1)                  BSD General Commands Manual                 XARGS(1)

NAME
     xargs -- construct argument list(s) and execute utility

SYNOPSIS
     xargs [-0opt] [-E eofstr] [-I replstr [-R replacements]] [-J replstr] [-L number] [-n number [-x]]
           [-P maxprocs] [-s size] [utility [argument ...]]



-J replstr
             If this option is specified, xargs will use the data read from standard input to replace
             the first occurrence of replstr instead of appending that data after all other arguments.
             This option will not affect how many arguments will be read from input (-n), or the size
             of the command(s) xargs will generate (-s).  The option just moves where those arguments
             will be placed in the command(s) that are executed.  The replstr must show up as a dis-
             tinct argument to xargs.  It will not be recognized if, for instance, it is in the middle
             of a quoted string.  Furthermore, only the first occurrence of the replstr will be
             replaced.  For example, the following command will copy the list of files and directories
             which start with an uppercase letter in the current directory to destdir:

                   /bin/ls -1d [A-Z]* | xargs -J % cp -rp % destdir