coreutils: yes invocation

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1 15.3 ‘yes’: Print a string until interrupted
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1 ‘yes’ prints the command line arguments, separated by spaces and
1 followed by a newline, forever until it is killed.  If no arguments are
1 given, it prints ‘y’ followed by a newline forever until killed.
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1    Upon a write error, ‘yes’ exits with status ‘1’.
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1    The only options are a lone ‘--help’ or ‘--version’.  To output an
1 argument that begins with ‘-’, precede it with ‘--’, e.g., ‘yes --
1 --help’.  ⇒Common options.
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