1STATSERIAL(1)                    User Commands                   STATSERIAL(1)
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NAME

6       statserial - display serial port modem status lines
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SYNOPSIS

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

14       Statserial  displays  a  table  of  the  signals on a standard 9-pin or
15       25-pin serial port, and indicates the status of the handshaking  lines.
16       It can be useful for debugging problems with serial ports or modems.
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18       The  optional device-name parameter is the full name of the device file
19       for the serial port in question. If not specified, the default is taken
20       from the environment variable MODEM if set, otherwise /dev/cua1.
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COMMAND-LINE OPTIONS

24       Each of the command line options is mutually exclusive.
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27       -n   Normally statserial will loop continuously, updating the status at
28            one second intervals; you can exit using Control-C. The -n  option
29            disables looping.
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32       -d
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34            With  this  option the status of the modem is printed as a decimal
35            number. The bits are encoded  as  follows  (XXX  indicates  unused
36            bits):
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38            +---+---+---+---+---+---+---+---+---+
39            | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
40            +---+---+---+---+---+---+---+---+---+
41            |DSR|RI |DCD|CTS|XXX|XXX|RTS|DTR|XXX|
42            +---+---+---+---+---+---+---+---+---+
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45       -x   This  option is the same as -d, except that the output is in hexa‐
46            decimal.
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BUGS/LIMITATIONS

50       Statserial only works with devices that support the TIOCMGET ioctl.
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52       You need permission to read the device file.
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54       The device file may be locked if other applications are using it.
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AUTHOR

58       Statserial was written by Jeff Tranter (Jeff_Tranter@Mitel.COM),  later
59       updated  by  Frank  Baumgart  (godot@uni-paderborn.de)  and is released
60       under the conditions of the GNU General Public License.  See  the  file
61       COPYING and notes in the source code for details.
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SEE ALSO

65       setserial(8) stty(1)
66       /usr/src/linux/drivers/char/serial.c /usr/include/linux/termios.h
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70Linux                          17 December 1994                  STATSERIAL(1)