Subject: Re: boot message
To: Marcin Jessa <email@example.com>
From: Hubert Feyrer <firstname.lastname@example.org>
Date: 04/03/2005 13:05:16
On Sun, 3 Apr 2005, Marcin Jessa wrote:
> Is there a way one can make a booting kernel be silent and not to spit out all the info of what's going on?
> I wish my soekris build to be quiet and display only boot loader's message and then go straight to the login prompt.
There are two ways to get that done:
1) re-enable console=pc, and make sure you have gettys enabled, esp.
on your serial port (tty00).
2) Really tell the kernel to not print anything at all. I don't know to
what extent that is supported, some support is available: printf(9)
documents in the aprint_*() functions that you can set a "boothowto"
variable to values like AB_QUIET, AB_VERBOSE and AB_SILENT.
I think the variable can be set from the bootprompt, setting a default in
src/sys/kern/init_main.c would make sense to me. You'll need to change the
C file for that.
In the bootloader, interrupt the countdown and type "boot -q".
The result is not too impressive though:
> boot -q
booting hd0a:netbsd (howto 0x10000)
BIOS CFG: Model-SubM-Rev: fc-00-01, 0x4074<EBDA,KBDINT,RTC,IC2,KBDF>
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
The NetBSD Foundation, Inc. All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
NetBSD 2.0.1 (GENERIC_IPSEC) #0: Sun Feb 27 00:57:26 CET 2005
total memory = 32380 KB
avail memory = 23780 KB
BIOS32 rev. 0 found at 0xf9700
Found mainbus0 (root)
Found cpu0 at mainbus0: (uniprocessor)
cpu0: Intel Pentium Pro (686-class), 801.13 MHz, id 0x613
cpu0: features a1bd<FPU,DE,PSE,TSC,MSR,MCE,CX8>
cpu0: features a1bd<PGE,CMOV>
cpu0: I-cache 8 KB 32B/line 4-way
cpu0: L2 cache 128 KB 32B/line 4-way
cpu0: 8 page colors
Found pci0 at mainbus0: configuration mode 1
Found pchb0 at pci0
pchb0: Intel 82441FX PCI and Memory Controller (PMC) (rev. 0x02)
Found pcib0 at pci0
pcib0: Intel 82371SB PCI-to-ISA Bridge (PIIX3) (rev. 0x00)
Found piixide0 at pci0: disk controller
piixide0: primary channel interrupting at irq 14
Found atabus0 at piixide0
piixide0: secondary channel interrupting at irq 15
Found atabus1 at piixide0
Found vga1 at pci0: Cirrus Logic CL-GD5446 (rev. 0x00)
I didn't find anything in the boot(8) manpage that indicates how to set
AB_SILENT (or AB_QUIET?). Try modifying the named .c file.
Having some switch to make things really silent would be nice.
NetBSD - Free AND Open! (And of course secure, portable, yadda yadda)