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statserial




SYNOPSIS

       statserial [-n |  -d | -x] <device-name>


DESCRIPTION

       Statserial  displays  a table of the signals on a standard
       9-pin or 25-pin serial port, and indicates the  status  of
       the  handshaking  lines.  It  can  be useful for debugging
       problems with serial ports or modems.

       The optional device-name parameter is the full name of the
       device file for the serial port in question. If not speci­
       fied, the default is taken from the  environment  variable
       MODEM if set, otherwise /dev/cua1.


COMMAND-LINE OPTIONS

       Each of the command line options is mutually exclusive.

       -n   Normally  statserial will loop continuously, updating
            the status at one  second  intervals;  you  can  exit
            using Control-C. The -n option disables looping.

       -d     With this option the status of the modem is printed
            as a decimal number. The bits are encoded as  follows
            (XXX indicates unused bits):

            +---+---+---+---+---+---+---+---+---+
            | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
            +---+---+---+---+---+---+---+---+---+
            |DSR|RI |DCD|CTS|XXX|XXX|RTS|DTR|XXX|
            +---+---+---+---+---+---+---+---+---+

       -x   This option is the same as -d, except that the output
            is in hexadecimal.


BUGS/LIMITATIONS

       Statserial  only  works  with  devices  that  support  the
       TIOCMGET ioctl.

       You need permission to read the device file.

       The  device  file  may be locked if other applications are
       using it.


Linux                    17 December 1994           STATSERIAL(1)
  

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