создавать списки аргументов и вызывать утилиту (construct argument lists and invoke utility)
Описание (Description)
The xargs utility shall construct a command line consisting of
the utility and argument operands specified followed by as many
arguments read in sequence from standard input as fit in length
and number constraints specified by the options. The xargs
utility shall then invoke the constructed command line and wait
for its completion. This sequence shall be repeated until one of
the following occurs:
* An end-of-file condition is detected on standard input.
* An argument consisting of just the logical end-of-file string
(see the -E eofstr option) is found on standard input after
double-quote processing, <apostrophe> processing, and
<backslash>-escape processing (see next paragraph). All
arguments up to but not including the argument consisting of
just the logical end-of-file string shall be used as
arguments in constructed command lines.
* An invocation of a constructed command line returns an exit
status of 255.
The application shall ensure that arguments in the standard input
are separated by unquoted <blank> characters, unescaped <blank>
characters, or <newline> characters. A string of zero or more
non-double-quote ('"') characters and non-<newline> characters
can be quoted by enclosing them in double-quotes. A string of
zero or more non-<apostrophe> ('\'') characters and non-<newline>
characters can be quoted by enclosing them in <apostrophe>
characters. Any unquoted character can be escaped by preceding it
with a <backslash>. The utility named by utility shall be
executed one or more times until the end-of-file is reached or
the logical end-of file string is found. The results are
unspecified if the utility named by utility attempts to read from
its standard input.
The generated command line length shall be the sum of the size in
bytes of the utility name and each argument treated as strings,
including a null byte terminator for each of these strings. The
xargs utility shall limit the command line length such that when
the command line is invoked, the combined argument and
environment lists (see the exec family of functions in the System
Interfaces volume of POSIX.1‐2017) shall not exceed
{ARG_MAX}-2048 bytes. Within this constraint, if neither the -n
nor the -s option is specified, the default command line length
shall be at least {LINE_MAX}.
