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dno
n00b
Joined: 30 Nov 2003
Posts: 4
Location: Asia / Taiwan / Taoyuan
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 Posted: Tue Jun 01, 2004 3:26 pm Post subject: INIT(8) Manual |
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quoted from init manual | Code: |
Init sets the following environment variables for all its children:
PATH /usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin
INIT_VERSION
As the name says. Useful to determine if a script runs directly
from init.
RUNLEVEL
The current system runlevel.
PREVLEVEL
The previous runlevel (useful after a runlevel switch).
CONSOLE
The system console. This is really inherited from the kernel;
however if it is not set init will set it to /dev/console by
default. |
but, when i trying access those variables with env commend
i just got nothing. what i messed ? |
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sapphirecat
Guru
Joined: 15 Jan 2003
Posts: 376
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| Posted: Tue Jun 01, 2004 5:50 pm Post subject: |
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I'm pretty sure login cleans out the environment, so those variables are only accessible to things run directly from init itself. On Gentoo, that's the /sbin/rc script which manages runlevel changes.
_________________
Former Gentoo user; switched to Kubuntu 7.04 when I got sick of waiting on gcc. Chance of thread necro if you reply now approaching 100%... |
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dno
n00b
Joined: 30 Nov 2003
Posts: 4
Location: Asia / Taiwan / Taoyuan
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| Posted: Tue Jun 01, 2004 6:45 pm Post subject: |
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| sapphirecat wrote: | | I'm pretty sure login cleans out the environment |
and sshd cleans out those environment variables too
sorry, i did not mention i'm working through ssh 
| Code: | $ pidof sshd
9808 9805 30764 30761 1314
$ pstree -ap 1314
sshd,1314
|-sshd,30761
| `-sshd,30764
| `-bash,30765
| |-man,31662 init
| | `-sh,31665 -c ...
| | `-sh,31666 -c ...
| | `-less,31671
| |-man,31718 init
| | `-sh,31721 -c ...
| | `-sh,31722 -c ...
| | `-less,31727
| |-man,31967 proc
| | `-sh,31970 -c ...
| | `-sh,31971 -c ...
| | `-less,31976
| `-su,9788 -
| `-bash,9789
| `-emerge,9795 -O /usr/bin/emerge sync
| `-rsync,9804 --recursive --links --safe-links ...
| `-rsync,9879 --recursive --links --safe-links ...
`-sshd,9805
`-sshd,9808
`-bash,9809
`-pstree,10036 -ap 1314 |
environment variables still exist in here
| Code: | # more /proc/1314/environ
CONSOLE=/dev/consoleTERM=linuxDEFAULTLEVEL=defaultCRITICAL_SERVICES=checkroot ho
stname modules checkfs localmountINIT_VERSION=sysvinit-2.84PATH=/bin:/sbin:/usr/
bin:/usr/sbin:/usr/local/sbin:/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/binRUNLE
VEL=3PWD=/PREVLEVEL=NBOOTLEVEL=bootSHLVL=1HOME=/SOFTLEVEL=defaultOLDSOFTLEVEL=bo
ot_=/sbin/start-stop-daemon |
all environment variables has been wipe out
| Code: | # more /proc/9805/environ
[
n |
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