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If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner] .TH TTYMON 8 "Feb 17, 2023" .SH NAME ttymon \- port monitor for terminal ports .SH SYNOPSIS .nf \fB/usr/lib/saf/ttymon\fR .fi .LP .nf \fB/usr/lib/saf/ttymon\fR \fB-g\fR [\fB-d\fR \fIdevice\fR] [\fB-h\fR] [\fB-t\fR \fItimeout\fR] [\fB-l\fR \fIttylabel\fR] [\fB-p\fR \fIprompt\fR] [\fB-m\fR \fImodules\fR] [\fB-T\fR \fItermtype\fR] .fi .SH DESCRIPTION \fBttymon\fR is a STREAMS-based TTY port monitor. Its function is to monitor ports, to set terminal modes, baud rates, and line disciplines for the ports, and to connect users or applications to services associated with the ports. Normally, \fBttymon\fR is configured to run under the Service Access Controller, \fBsac\fR(8), as part of the Service Access Facility (SAF). It is configured using the \fBsacadm\fR(8) command. Each instance of \fBttymon\fR can monitor multiple ports. The ports monitored by an instance of \fBttymon\fR are specified in the port monitor's administrative file. The administrative file is configured using the \fBpmadm\fR(8) and \fBttyadm\fR(8) commands. When an instance of \fBttymon\fR is invoked by the \fBsac\fR command, it starts to monitor its ports. For each port, \fBttymon\fR first initializes the line disciplines, if they are specified, and the speed and terminal settings. For ports with entries in \fB/etc/logindevperm\fR, device owner, group and permissions are set. (See \fBlogindevperm\fR(5).) The values used for initialization are taken from the appropriate entry in the TTY settings file. This file is maintained by the \fBsttydefs\fR(8) command. Default line disciplines on ports are usually set up by the \fBautopush\fR(8) command of the Autopush Facility. .sp .LP \fBttymon\fR then writes the prompt and waits for user input. If the user indicates that the speed is inappropriate by pressing the BREAK key, \fBttymon\fR tries the next speed and writes the prompt again. When valid input is received, \fBttymon\fR interprets the per-service configuration file for the port, if one exists, creates a \fButmpx\fR entry if required (see \fButmpx\fR(5)), establishes the service environment, and then invokes the service associated with the port. Valid input consists of a string of at least one non-newline character, terminated by a carriage return. After the service terminates, \fBttymon\fR cleans up the \fButmpx\fR entry, if one exists, and returns the port to its initial state. .sp .LP If \fIautobaud\fR is enabled for a port, \fBttymon\fR will try to determine the baud rate on the port automatically. Users must enter a carriage return before \fBttymon\fR can recognize the baud rate and print the prompt. Currently, the baud rates that can be determined by \fIautobaud\fR are \fB110\fR, \fB1200\fR, \fB2400\fR, \fB4800\fR, and \fB9600\fR. .sp .LP If a port is configured as a bidirectional port, \fBttymon\fR will allow users to connect to a service, and, if the port is free, will allow \fBuucico\fR(8), \fBcu\fR(1C), or \fBct\fR(1C) to use it for dialing out. If a port is bidirectional, \fBttymon\fR will wait to read a character before it prints a prompt. .sp .LP If the \fIconnect-on-carrier\fR flag is set for a port, \fBttymon\fR will immediately invoke the port's associated service when a connection request is received. The prompt message will not be sent. .sp .LP If a port is disabled, \fBttymon\fR will not start any service on that port. If a disabled message is specified, \fBttymon\fR will send out the disabled message when a connection request is received. If \fBttymon\fR is disabled, all ports under that instance of \fBttymon\fR will also be disabled. .SS "Service Invocation" The service \fBttymon\fR invokes for a port is specified in the \fBttymon\fR administrative file. \fBttymon\fR will scan the character string giving the service to be invoked for this port, looking for a \fB%d\fR or a \fB%%\fR two-character sequence. If \fB%d\fR is found, \fBttymon\fR will modify the service command to be executed by replacing those two characters by the full path name of this port (the device name). If \fB%%\fR is found, they will be replaced by a single \fB%\fR. When the service is invoked, file descriptor \fB0\fR, \fB1\fR, and \fB2\fR are opened to the port device for reading and writing. The service is invoked with the user ID, group ID and current home directory set to that of the user name under which the service was registered with \fBttymon\fR. Two environment variables, \fBHOME\fR and \fBTTYPROMPT\fR, are added to the service's environment by \fBttymon\fR. \fBHOME\fR is set to the home directory of the user name under which the service is invoked. \fBTTYPROMPT\fR is set to the prompt string configured for the service on the port. This is provided so that a service invoked by \fBttymon\fR has a means of determining if a prompt was actually issued by \fBttymon\fR and, if so, what that prompt actually was. .sp .LP See \fBttyadm\fR(8) for options that can be set for ports monitored by \fBttymon\fR under the Service Access Controller. .SS "System Console Invocation" The invocation of ttymon on the system console is managed under \fBsmf\fR(7) by the service \fBsvc:/system/console-login\fR. It provides a number of properties within the property group \fBttymon\fR to control the invocation, as follows: .sp .in +2 .nf NAME TYPE TTYMON OPTION ---------------------------------------------------------- device astring [-d device] nohangup boolean [-h] label astring [-l label] modules astring [-m module1,module2] prompt astring [-p prompt] timeout count [-t timeout] terminal_type astring [-T termtype] .fi .in -2 .sp .sp .LP If any value is the empty string or an integer set to zero, then the option is not passed to the ttymon invocation. The \fB-g\fR option is always specified for this invocation. The \fB-d\fR option always defaults to \fB/dev/console\fR if it is not set. .sp .LP See \fBEXAMPLES\fR. .SH SECURITY \fBttymon\fR uses \fBpam\fR(3PAM) for session management. The \fBPAM\fR configuration policy, listed through \fB/etc/pam.conf\fR, specifies the modules to be used for \fBttymon\fR. Here is a partial \fBpam.conf\fR file with entries for \fBttymon\fR using the UNIX session management module. .sp .in +2 .nf ttymon session required /usr/lib/security/pam_unix_session.so.1 .fi .in -2 .sp .LP If there are no entries for the \fBttymon\fR service, then the entries for the "other" service will be used. .SH OPTIONS The following options are supported: .sp .ne 2 .na \fB\fB-g\fR\fR .ad .RS 14n A special invocation of \fBttymon\fR is provided with the \fB-g\fR option. This form of the command should only be called by applications that need to set the correct baud rate and terminal settings on a port and then connect to \fBlogin\fR service, but that cannot be pre-configured under the SAC. The following combinations of options can be used with \fB-g\fR: .RE .sp .ne 2 .na \fB\fB-d\fR\fIdevice\fR\fR .ad .RS 14n \fIdevice\fR is the full path name of the port to which \fBttymon\fR is to attach. If this option is not specified, file descriptor \fB0\fR must be set up by the invoking process to a TTY port. .RE .sp .ne 2 .na \fB\fB-h\fR\fR .ad .RS 14n If the -h flag is not set, \fBttymon\fR will force a hangup on the line by setting the speed to zero before setting the speed to the default or specified speed. .RE .sp .ne 2 .na \fB\fB-l\fR\fIttylabel\fR\fR .ad .RS 14n \fIttylabel\fR is a link to a speed and TTY definition in the \fBttydefs\fR file. This definition tells \fBttymon\fR at what speed to run initially, what the initial TTY settings are, and what speed to try next if the user indicates that the speed is inappropriate by pressing the BREAK key. The default speed is 9600 baud. .RE .sp .ne 2 .na \fB\fB-m\fR\fImodules\fR\fR .ad .RS 14n When initializing the port, \fBttymon\fR will pop all modules on the port, and then push \fImodules\fR in the order specified. \fImodules\fR is a comma-separated list of pushable modules. Default modules on the ports are usually set up by the Autopush Facility. .RE .sp .ne 2 .na \fB\fB-p\fR\fIprompt\fR\fR .ad .RS 14n Allows the user to specify a prompt string. The default prompt is \fBLogin:\fR. .RE .sp .ne 2 .na \fB\fB-t\fR\fItimeout\fR\fR .ad .RS 14n Specifies that \fBttymon\fR should exit if no one types anything in \fItimeout\fR seconds after the prompt is sent. .RE .sp .ne 2 .na \fB\fB-T\fR\fItermtype\fR\fR .ad .RS 14n Sets the \fBTERM\fR environment variable to \fItermtype\fR. .RE .SH EXAMPLES \fBExample 1 \fRSetting the Terminal Type .sp .LP The following example sets the value of the terminal type (\fB-T\fR) option for the system console \fBttymon\fR invocation: .sp .in +2 .nf svccfg -s svc:/system/console-login setprop \e ttymon/terminal_type = "xterm" svcadm refresh svc:/system/console-login:default .fi .in -2 .sp .SH ENVIRONMENT VARIABLES If any of the \fBLC_*\fR variables (\fBLC_CTYPE\fR, \fBLC_MESSAGES\fR, \fBLC_TIME\fR, \fBLC_COLLATE\fR, \fBLC_NUMERIC\fR, and \fBLC_MONETARY\fR) (see \fBenviron\fR(7)) are not set in the environment, the operational behavior of \fBttymon\fR for each corresponding locale category is determined by the value of the \fBLANG\fR environment variable. If \fBLC_ALL\fR is set, its contents are used to override both the \fBLANG\fR and the other \fBLC_*\fR variables. If none of the above variables is set in the environment, the "C" (U.S. style) locale determines how \fBttymon\fR behaves. .sp .ne 2 .na \fB\fBLC_CTYPE\fR\fR .ad .RS 12n Determines how \fBttymon\fR handles characters. When \fBLC_CTYPE\fR is set to a valid value, \fBttymon\fR can display and handle text and filenames containing valid characters for that locale. \fBttymon\fR can display and handle Extended Unix Code (EUC) characters where any individual character can be 1, 2, or 3 bytes wide. \fBttymon\fR can also handle EUC characters of 1, 2, or more column widths. In the "C" locale, only characters from ISO 8859-1 are valid. .RE .SH FILES .ne 2 .na \fB\fB/etc/logindevperm\fR\fR .ad .RS 21n .RE .sp .LP The command-line syntax is Stable. The SMF properties are Evolving. .SH SEE ALSO .BR ct (1C), .BR cu (1C), .BR pam (3PAM), .BR logindevperm (5), .BR pam.conf (5), .BR utmpx (5), .BR attributes (7), .BR environ (7), .BR pam_authtok_check (7), .BR pam_authtok_get (7), .BR pam_authtok_store (7), .BR pam_dhkeys (7), .BR pam_passwd_auth (7), .BR pam_unix_account (7), .BR pam_unix_auth (7), .BR pam_unix_session (7), .BR smf (7), .BR autopush (8), .BR pmadm (8), .BR sac (8), .BR sacadm (8), .BR sttydefs (8), .BR ttyadm (8), .BR uucico (8) .sp .LP \fI\fR .SH NOTES If a port is monitored by more than one \fBttymon\fR, it is possible for the \fBttymon\fRs to send out prompt messages in such a way that they compete for input. .sp .LP The \fBpam_unix\fR(7) module is no longer supported. Similar functionality is provided by \fBpam_authtok_check\fR(7), \fBpam_authtok_get\fR(7), \fBpam_authtok_store\fR(7), \fBpam_dhkeys\fR(7), \fBpam_passwd_auth\fR(7), \fBpam_unix_account\fR(7), \fBpam_unix_auth\fR(7), and \fBpam_unix_session\fR(7).