bootlogd(8) [linux man page]

BOOTLOGD(8)						Linux System Administrator's Manual					       BOOTLOGD(8)

NAME

       bootlogd - record boot messages

SYNOPSIS

       /sbin/bootlogd [-c] [-d] [-r] [-s] [-v] [ -l logfile ] [ -p pidfile ]

DESCRIPTION

       Bootlogd  runs in the background and copies all strings sent to the /dev/console device to a logfile. If the logfile is not accessible, the
       messages will be kept in memory until it is.

OPTIONS

       -d     Do not fork and run in the background.

       -c     Attempt to write to the logfile even if it does not yet exist.  Without this option, bootlogd will wait for the  logfile	to  appear
	      before attempting to write to it.  This behavior prevents bootlogd from creating logfiles under mount points.

       -r     If there is an existing logfile called logfile rename it to logfile~ unless logfile~ already exists.

       -s     Ensure  that the data is written to the file after each line by calling fdatasync(3).  This will slow down a fsck(8) process running
	      in parallel.

       -v     Show version.

       -l logfile
	      Log to this logfile. The default is /var/log/boot.

       -p pidfile
	      Put process-id in this file. The default is no pidfile.

BUGS

       Bootlogd works by redirecting the console output from the console device.  (Consequently bootlogd requires PTY support in the  kernel  con-
       figuration.)   It  copies that output to the real console device and to a log file.  There is no standard way of ascertaining the real con-
       sole device if you have a new-style /dev/console device (major 5, minor 1) so bootlogd parses the kernel  command  line	looking  for  con-
       sole=... lines and deduces the real console device from that.  If that syntax is ever changed by the kernel, or a console type is used that
       bootlogd does not know about then bootlogd will not work.

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl

SEE ALSO

       dmesg(8),fdatasync(3).

								   Jul 21, 2003 						       BOOTLOGD(8)

CONSCONTROL(8)						    BSD System Manager's Manual 					    CONSCONTROL(8)

NAME

     conscontrol -- control physical console devices

SYNOPSIS

     conscontrol [list]
     conscontrol mute on | off
     conscontrol add | delete console
     conscontrol set | unset console

DESCRIPTION

     The conscontrol utility is used to examine and modify the physical devices which back the virtual console devices.  If no arguments (or only
     the list command) are specified, the current console settings are shown.

     There are two types of logical consoles; a high level console which is represented by /dev/console, and a low level console.  The low level
     console is used for kernel printf(9) and ddb(4) debugger support, while the high level console is used by user programs like syslogd(8).
     Multiple device support is implemented only for the low level console; the high level console is set to the first device in the console list.

     Multiple console support may be invoked by passing the kernel the -D flag from the boot loader, or by using conscontrol to change the list of
     console devices after the system has booted.

     The following options are available:

     add | delete console
	     Add or delete a physical device from the logical console.	The device must support low-level console operations.  Adding a device
	     will place it at the front of the list of console devices; the first device is used for the high level console.

	     The console argument is the name of a console device in /dev; the name of the directory may be omitted.

     mute on | off
	     Change the state of console muting.  All console output is suppressed when console muting is on.

     set | unset console
	     Set or unset the virtual console.	When unset, output from the system, such as the kernel printf(9), always goes out to the real main
	     console.  When set, it goes to another.  This is an interface to the tty ioctl TIOCCONS.

SEE ALSO

     sio(4), syscons(4), tty(4), vt(4), boot(8), loader(8)

HISTORY

     The conscontrol utility first appeared in FreeBSD 5.0.

AUTHORS

     Jonathan Lemon

BSD
								  April 14, 2011							       BSD