bootlogd(8)
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 configuration.)
It copies that output to the real console device and to a log file.
There is no standard way of ascertaining the real console device
if you have a new-style
/dev/console device (major 5, minor 1)
so
bootlogd parses the kernel command line looking for
console=... 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.
