diff options
| -rw-r--r-- | libexec/getty/ttys.5 | 12 | ||||
| -rw-r--r-- | sbin/init/init.8 | 27 |
2 files changed, 31 insertions, 8 deletions
diff --git a/libexec/getty/ttys.5 b/libexec/getty/ttys.5 index 502decb..43404e6 100644 --- a/libexec/getty/ttys.5 +++ b/libexec/getty/ttys.5 @@ -56,9 +56,11 @@ Blank lines and comments may appear anywhere in the file; comments are delimited by hash marks (``#'') and new lines. Any unspecified fields will default to null. .Pp -The first field is the +The first field is normally the name of the terminal special file as it is found in .Pa /dev . +However, it can be any arbitrary string +when the associated command is not related to a tty. .Pp The second field of the file is the command to execute for the line, usually @@ -125,6 +127,14 @@ If no group is specified, then the tty becomes a member of the group "none". For backwards compatibility, the ``group='' should appear last on the line, immediately before the optional comment. +.Pp +Both the second field and any command specified with ``window='' +will be split into words and executed using +.Xr execve 2 . +Words are separated by any combinations of tabs and spaces. +Arguments containing whitespace should be enclosed in single quotes +.Pq ' . +Note that no shell-style globbing or other variable substitution occurs. .Sh EXAMPLES .Bd -literal # root login on console at 1200 baud diff --git a/sbin/init/init.8 b/sbin/init/init.8 index d779c0e..c254963 100644 --- a/sbin/init/init.8 +++ b/sbin/init/init.8 @@ -152,7 +152,11 @@ maintains processes for the terminal ports found in the file .Xr ttys 5 . .Nm Init -reads this file, and executes the command found in the second field. +reads this file and executes the command found in the second field, +unless the first field refers to a device in +.Pa /dev +which is not configured. +The first field is supplied as the final argument to the command. This command is usually .Xr getty 8 ; .Nm getty @@ -182,6 +186,18 @@ executing a new .Nm getty for the line. .Pp +.Nm Init +can also be used to keep arbitrary daemons running, +automatically restarting them if they die. +In this case, the first field in the +.Xr ttys 5 +file must not reference the path to a configured device node +and will be passed to the daemon +as the final argument on its command line. +This is similar to the facility offered in the +.At V +.Pa /etc/inittab . +.Pp Line status (on, off, secure, getty, or window information) may be changed in the .Xr ttys 5 @@ -205,10 +221,8 @@ For any lines that were previously turned off in the .Xr ttys 5 file and are now on, .Nm -executes a new -.Nm getty -to enable a new login. -If the getty or window field for a line is changed, +executes the command specified in the second field. +If the command or window field for a line is changed, the change takes effect at the end of the current login session (e.g., the next time .Nm @@ -238,8 +252,7 @@ will not wait for them all to die (which might take forever), but will time out after 30 seconds and print a warning message. .Pp .Nm Init -will cease creating new -.Nm getty Ns 's +will cease creating new processes and allow the system to slowly die away, if it is sent a terminal stop .Pq Dv TSTP signal, i.e. |
