xargs(1posix) - construct argument lists and invoke utility
-E  eofstr
       Use  eofstr  as  the logical end-of-file string. If -E is not specified, it is unspecified whether
       the logical end-of-file string is the underscore character (  '_'  )  or  the  end-of-file  string
       capability  is disabled. When eofstr is the null string, the logical end-of-file string capability
       shall be disabled and underscore characters shall be taken literally.
-I  replstr
       Insert mode: utility is executed for each line from standard input, taking the entire  line  as  a
       single  argument,  inserting  it  in  arguments  for each occurrence of replstr. A maximum of five
       arguments in arguments can each contain one or more instances of  replstr.  Any  <blank>s  at  the
       beginning  of each line shall be ignored. Constructed arguments cannot grow larger than 255 bytes.
       Option -x shall be forced on.
-L  number
       The utility shall be executed for each non-empty number lines of arguments  from  standard  input.
       The last invocation of utility shall be with fewer lines of arguments if fewer than number remain.
       A line is considered to end with the first <newline> unless the last character of the  line  is  a
       <blank>; a trailing <blank> signals continuation to the next non-empty line, inclusive. The -L and
       -n options are mutually-exclusive; the last one specified shall take effect.
-n  number
       Invoke utility using as many standard input arguments  as  possible,  up  to  number  (a  positive
       decimal integer) arguments maximum. Fewer arguments shall be used if:

        * The  command line length accumulated exceeds the size specified by the -s option (or {LINE_MAX}
          if there is no -s option).

        * The last iteration has fewer than number, but not zero, operands remaining.
-p     Prompt mode: the user is asked whether to execute utility at each invocation. Trace mode ( -t)  is
       turned on to write the command instance to be executed, followed by a prompt to standard error. An
       affirmative response read from /dev/tty shall execute  the  command;  otherwise,  that  particular
       invocation of utility shall be skipped.
-s  size
       Invoke  utility  using as many standard input arguments as possible yielding a command line length
       less than size (a positive decimal integer) bytes. Fewer arguments shall be used if:

        * The total number of arguments exceeds that specified by the -n option.

        * The total number of lines exceeds that specified by the -L option.

        * End-of-file is encountered on standard input before size bytes are accumulated.

Values of size up to at least  {LINE_MAX}  bytes  shall  be  supported,  provided  that  the  constraints
specified  in  the  DESCRIPTION  are met. It shall not be considered an error if a value larger than that
supported by the implementation or exceeding the constraints specified in the DESCRIPTION is given; xargs
shall use the largest value it supports within the constraints.
-t     Enable  trace  mode.  Each generated command line shall be written to standard error just prior to
-x     Terminate if a command line containing number arguments (see the -n  option  above)     or  number
       lines  (see the -L option above)  will not fit in the implied or specified size (see the -s option