История изменений

может это сигнал для винды?

Читаю маны, вслух, дорого: (man printf)

     Character escape sequences are in backslash notation as defined in the ANSI X3.159-1989
     (``ANSI C89"), with extensions.  The characters and their meanings are as follows:

           \a      Write a <bell> character.
           \b      Write a <backspace> character.
           \c      Ignore remaining characters in this string.
           \f      Write a <form-feed> character.
           \n      Write a <new-line> character.
           \r      Write a <carriage return> character.
           \t      Write a <tab> character.
           \v      Write a <vertical tab> character.
           \'      Write a <single quote> character.
           \\      Write a backslash character.
           \num    Write a byte whose value is the 1-, 2-, or 3-digit octal number num.
                   Multibyte characters can be constructed using multiple \num sequences.

Далее, man xset:

       b       The b option controls bell volume, pitch and duration.  This option accepts up
               to three numerical parameters, a preceding dash(-), or a 'on/off' flag.  If no
               parameters are given, or the 'on' flag is used, the system  defaults  will  be
               used.

может это сигнал для винды?

Читаю маны, вслух, дорого: (man printf)

     Character escape sequences are in backslash notation as defined in the ANSI X3.159-1989
     (``ANSI C89"), with extensions.  The characters and their meanings are as follows:

           \a      Write a <bell> character.
           \b      Write a <backspace> character.
           \c      Ignore remaining characters in this string.
           \f      Write a <form-feed> character.
           \n      Write a <new-line> character.
           \r      Write a <carriage return> character.
           \t      Write a <tab> character.
           \v      Write a <vertical tab> character.
           \'      Write a <single quote> character.
           \\      Write a backslash character.
           \num    Write a byte whose value is the 1-, 2-, or 3-digit octal number num.
                   Multibyte characters can be constructed using multiple \num sequences.

man set:

       b       The b option controls bell volume, pitch and duration.  This option accepts up
               to three numerical parameters, a preceding dash(-), or a 'on/off' flag.  If no
               parameters are given, or the 'on' flag is used, the system  defaults  will  be
               used.