tty Path to a serial device like /dev/ttyS*, /dev/cua* or
/dev/ptmx to spawn a new pseudo tty.
[-c command]
Execute command when the line is hung up. This can be used
to run scripts or re-establish connections when a link
goes down.
[-d] Enable debugging output. Useful when determining why a
given setup doesn't work.
[-h] Exit when the carrier is lost. This works on both /dev/tty
and /dev/cua devices by directly monitoring the carrier
status every 15 seconds.
[-v] Enable verbose output. Useful in shell scripts.
[-q] Operate in quiet mode - no messages at all.
[-l] Create an UUCP-style lockfile for the device in /var/lock.
[-n] Equivalent to the "mesg n" command.
[-m] Do not initialize the line into 8 bits raw mode.
[-e] Exit right after initializing device, instead of waiting
for the line to hang up.
[-L] Enable 3 wire operation. The terminal is moved into CLOCAL
mode, carrier watching is disabled.
[-p proto]
Set a specific kind of protocol to use on the line. The
default is set to cslip, i.e. compressed SLIP. Other
possible values are slip (normal SLIP), adaptive (adaptive
CSLIP/SLIP), ppp (Point-to-Point Protocol) and kiss (a
protocol used for communicating with AX.25 packet radio
terminal node controllers). The special argument tty can
be used to put the device back into normal serial
operation. Using 'ppp' mode is not normally useful as ppp
requires an additional ppp daemon pppd to be active on the
line. For kiss connections the kissattach program should
be used.
[-s speed]
Set a specific line speed, other than the default.
If no arguments are given, the current terminal line (usually:
the login device) is used. Otherwise, an attempt is made to
claim the indicated terminal port, lock it, and open it.
