Weird behavior with /dev/mem

From: Daniel C. Sobral <dcs_at_tcoip.com.br>
Date: Fri, 31 Oct 2003 17:31:33 -0200
Weird thing. I updated my system today (October 31), and now I can't 
list routes from syscons. But I still can list routes from Konsole, on 
X. Following a suggestion by Genesys, I checked permissions of /dev/mem 
and netstat and... for some reason, I can't stat /dev/mem under syscons! 
Here are a couple of typescripts I got:

[0] dcs_at_dcs:/opt/home/dcs$ cat from_konsole
Script started on Fri Oct 31 17:25:04 2003
dcs_at_dcs:/opt/home/dcs$ ls -ld /dev
dr-xr-xr-x  4 root  wheel  512 Oct 31 13:56 /dev
dcs_at_dcs:/opt/home/dcs$ ls -l /dev/mem
crw-r-----  1 root  kmem    2,   0 Oct 31 15:54 /dev/mem
dcs_at_dcs:/opt/home/dcs$ ls -l /usr/bin/netstat
-r-xr-sr-x  1 root  kmem  108664 Oct 31 13:18 /usr/bin/netstat
dcs_at_dcs:/opt/home/dcs$ netstat -nr
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            10.0.11.1          UGSc        0        0   fxp0
10/16              link#1             UC          0        0   fxp0
10.0.2.72          00:04:23:2a:13:7b  UHLW        0        1   fxp0    881
10.0.11.1          00:10:54:cd:58:40  UHLW       28        0   fxp0   1197
10.0.12.131        00:01:30:26:e0:00  UHLW        0        0   fxp0   1186
10.0.14.20         00:02:55:58:22:0a  UHLW        6    39928   fxp0    975
127.0.0.1          127.0.0.1          UH          0        6    lo0
dcs_at_dcs:/opt/home/dcs$ exit
exit

Script done on Fri Oct 31 17:25:20 2003
[0] dcs_at_dcs:/opt/home/dcs$ cat from_syscons
Script started on Fri Oct 31 17:26:01 2003
root_at_dcs:/root$ ls -ld /dev
dr-xr-xr-x  4 root  wheel  512 Oct 31 13:56 /dev
root_at_dcs:/root$ ls -l /dev/mem
ls: /dev/mem: Permission denied
root_at_dcs:/root$ ls -l /usr/bin/netstat
-r-xr-sr-x  1 root  kmem  108664 Oct 31 13:18 /usr/bin/netstat
root_at_dcs:/root$ netstat -nr
netstat: kvm not available
Routing tables
rt_tables: symbol not in namelist
root_at_dcs:/root$ exit
exit

Script done on Fri Oct 31 17:26:18 2003
[0] dcs_at_dcs:/opt/home/dcs$ which ls
/bin/ls
[0] dcs_at_dcs:/opt/home/dcs$ type ls
ls is aliased to `ls -G'
[0] dcs_at_dcs:/opt/home/dcs$ unalias ls
[0] dcs_at_dcs:/opt/home/dcs$ ls -l /dev/mem
crw-r-----  1 root  kmem    2,   0 Oct 31 15:54 /dev/mem

I'm CCing phk on the grounds of Mr Devfs, and Sam as I blamed the 
networking code earlier... :-)

-- 
Daniel C. Sobral                   (8-DCS)
Gerencia de Operacoes
Divisao de Comunicacao de Dados
Coordenacao de Seguranca
VIVO Centro Oeste Norte
Fones: 55-61-313-7654/Cel: 55-61-9618-0904
E-mail: Daniel.Capo_at_tco.net.br
         Daniel.Sobral_at_tcoip.com.br
         dcs_at_tcoip.com.br

Outros:
	dcs_at_newsguy.com
	dcs_at_freebsd.org
	capo_at_notorious.bsdconspiracy.net

Ignisecond, n.:
	The overlapping moment of time when the hand is locking the car
door even as the brain is saying, "my keys are in there!"
		-- Rich Hall, "Sniglets"
Received on Fri Oct 31 2003 - 10:31:39 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:37:27 UTC