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)
Check Out this Related Man Page
consadm(1m) System Administration Commands consadm(1m)NAME
consadm - select or display devices used as auxiliary console devices
SYNOPSIS
/usr/sbin/consadm
/usr/sbin/consadm [-a device...] [-p]
/usr/sbin/consadm [-d device...] [-p]
/usr/sbin/consadm [-p]
DESCRIPTION
consadm selects the hardware device or devices to be used as auxiliary console devices, or displays the current device. Only superusers are
allowed to make or display auxiliary console device selections.
Auxiliary console devices receive copies of console messages, and can be used as the console during single user mode. In particular, they
receive kernel messages and messages directed to /dev/sysmsg. On Solaris x86 based systems they can also be used for interaction with the
bootstrap.
By default, selecting a display device to be used as an auxiliary console device selects that device for the duration the system remains
up. If the administrator needs the selection to persist across reboots the -p option can be specified.
consadm runs a daemon in the background, monitoring auxiliary console devices. Any devices that are disconnected (hang up, lose carrier)
are removed from the auxiliary console device list, though not from the persistent list. While auxiliary console devices may have been
removed from the device list receiving copies of console messages, those messages will always continue to be displayed by the default con-
sole device.
The daemon will not run if it finds there are not any auxiliary devices configured to monitor. Likewise, after the last auxiliary console
is removed, the daemon will shut itself down. Therefore the daemon persists for only as long as auxiliary console devices remain active.
See eeprom(1M) for instructions on assigning an auxiliary console device as the system console.
OPTIONS
The following options are supported:
-a device Adds device to the list of auxiliary console devices. Specify device as the path name to the device or devices to be added to
the auxiliary console device list.
-d device Removes device from the list of auxiliary console devices. Specify device as the path name to the device or devices to be
removed from the auxiliary console device list.
-p Prints the list of auxiliary consoles that will be auxiliary across reboots.
When invoked with the -a or -d options , tells the application to make the change persist across reboot.
EXAMPLES
Example 1 Adding to the list of devices that will receive console messages
The following command adds /dev/term/a to the list of devices that will receive console messages.
example# consadm -a /dev/term/a
Example 2 Removing from the list of devices that will receive console messages
The following command removes /dev/term/a from the list of devices that will receive console messages. This includes removal from the per-
sistent list.
example# consadm -d -p /dev/term/a
Example 3 Printing the list of devices selected as auxiliary console devices
The following command prints the name or names of the device or devices currently selected as auxiliary console devices.
example# consadm
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of consadm: LC_CTYPE, LC_MESSAGES, and
NLSPATH.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Stability Level |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO svcs(1), eeprom(1M), svcadm(1M), syslogd(1M), kadb(1M), environ(5), attributes(5), smf(5), sysmsg(7d), console(7d)NOTES
Auxiliary console devices are not usable for kadb or firmware I/O, do not receive panic messages, and do not receive output directed to
/dev/console.
The consadm service is managed by the service management facility, smf(5), under the service identifier:
svc:/system/consadm
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
SunOS 5.11 27 Oct 2004 consadm(1m)