after modify /etc/inittab, my daemon never work, unless reboot the machine

[incle]

after modify /etc/inittab, my daemon never work, unless reboot the machine

[incle]

After modify the /etc/inittab file, then
i type 'init q', 'init Q' or 'telinit q' anyway, my daemon process cannot start.

my modification as following:
mydm:2345:respawn:/sbin/mydm

but if reboot the machine, then everything is ok. (every times)

why and how can I deal with this problem?
( I want to after modify the /etc/inittab and type 'init q' then my process immediately running. need not reboot)

thanks
--Incle

[Amit Parui · Accepted solution]

Can you brief what modifications have you done in you /etc/inittab? Have you got a copy or backup of /etc/inittab file before changes done, check out the differences.

diff changed previous

[incle]

#!/bin/bash

echo "Let's begin"

[ -f /home/incle/daemon_other ] && {
while fgrep daemon_other /etc/inittab >/dev/null
do
echo -e "/daemon_other\nd\nw\nq\n" | ed /etc/inittab - >/dev/null
done
echo -e "$\na\ndoor:2345:respawn:/home/incle/daemon_other\n.\nw\nq\n" |
ed /etc/inittab - >/dev/null

/sbin/init q
}
[ -f /home/incle/daemon_loop ] && {
while fgrep daemon_loop /etc/inittab >/dev/null
do
echo -e "/daemon_loop\nd\nw\nq\n" | ed /etc/inittab - >/dev/null
done
echo -e "$\na\ndaem:2345:respawn:/home/incle/daemon_loop\n.\nw\nq\n" |
ed /etc/inittab - >/dev/null

/sbin/init q
}
echo "Good job, bye!"

[Dennis Handly]

>And you mean that I should use 'sh' as my shell in the script.

Yes, actually /sbin/sh.

>in my HP machine the /usr never mounted.

/usr/ is mounted with the rest of the file systems when you go to multiuser mode.

[Duncan Edmonstone]

Well what's your current/deafult run-level?

who -r

grep initdefault /etc/iniitab

HTH

Duncan

[incle]

>> /usr/ is mounted with the rest of the file systems when you go to multiuser

mode.
how to make /usr/ isnt't mounted? changes the runlever?


>> Well what's your current/deafult run-level?
bash-3.2# who -r
. run-level 3 Sep 29 10:25 3 0 S
bash-3.2# grep initdefault /etc/inittab
init:3:initdefault:

[Dennis Handly]

>how to make /usr/ isn't mounted? change the run level?

The easiest is to boot into single user mode.

[Duncan Edmonstone]

hmmm - can we do a little test here to confirm this is an init problem and not your daemon (as root):

cat > /init-test <#!/sbin/sh
while true do
sleep 10
done
EOF

chmod u+x /init-test

echo "test:2345:respawn:/init-test" >> /etc/inittab

init q

ps -ef | grep init-test

Do you see the process running or not?

(This little test works fine on my system)

Don't forget to remove this test line from inittab and 'init q' after running all this.

HTH

Duncan

[Duncan Edmonstone]

oops - typo:

cat > /init-test <#!/sbin/sh
while true
do
sleep 10
done
EOF

chmod u+x /init-test

echo "test:2345:respawn:/init-test" >> /etc/inittab

init q

ps -ef | grep init-test

[incle]

bash-3.2# vi /etc/inittab
init:3:initdefault:
.
.
.
.
/etc/opt/resmon/persistence/runlevel4_flag"
ems4:0123456:respawn:/etc/opt/resmon/lbin/p_client



----
bash-3.2# ./daemon.sh
+ echo Let's begin
Let's begin
+ [ -f /home/incle/daemon_other ]
+ fgrep daemon_other /etc/inittab
+ 1> /dev/null
+ ed /etc/inittab -
+ echo -e $\na\ndoor:2345:respawn:/home/incle/daemon_other\n.\nw\nq\n
+ 1> /dev/null
+ /sbin/init q
+ [ -f /home/incle/daemon_loop ]
+ fgrep daemon_loop /etc/inittab
+ 1> /dev/null
+ echo -e $\na\ndaem:2345:respawn:/home/incle/daemon_loop\n.\nw\nq\n
+ ed /etc/inittab -
+ 1> /dev/null
+ /sbin/init q
+ echo Good job, bye!
Good job, bye!
bash-3.2#
bash-3.2#
bash-3.2# ps -ef|grep daemon_
root 3015 2919 1 11:07:29 pts/ta 0:00 grep daemon_
root 3009 1 153 11:06:34 ? 0:54 /home/incle/daemon_other
bash-3.2#
bash-3.2# uname -a
HP-UX l1000 B.11.11 U 9000/800 545706547 unlimited-user license
bash-3.2#
bash-3.2#init Q
bash-3.2# ps -ef|grep daemon_
root 3020 2919 2 11:08:37 pts/ta 0:00 grep daemon_
root 3009 1 229 11:06:34 ? 2:02 /home/incle/daemon_other
bash-3.2#


-----
bash-3.2# vi /etc/inittab
init:3:initdefault:
.
.
.
./etc/opt/resmon/persistence/runlevel4_flag"
ems4:0123456:respawn:/etc/opt/resmon/lbin/p_client
door:2345:respawn:/home/incle/daemon_other
daem:2345:respawn:/home/incle/daemon_loop

[incle]

bash-3.2# chmod u+x init-test
bash-3.2# ls -lat init-test
-rwxrw-rw- 1 root sys 39 Sep 29 11:26 init-test
bash-3.2# echo -e "test:2345:respawn:/home/incle/init-test">>/etc/inittab
bash-3.2# init q
bash-3.2# ps -ef|grep init-test
root 3054 1 0 11:27:57 ? 0:00 /sbin/sh /home/incle/init-test
root 3058 2919 1 11:28:08 pts/ta 0:00 grep init-test

[incle]

see also in my running the ./daemon.sh

you can see just the first(daemon_other) daemon work, but the second(daemon_loop) never work.

[incle]

And I found use the same script(daemon.sh) to run this daemons( daemon_loop and daemon_other) was OK on RedHat linux-2.6

[incle]

hi, friends. do you got the same problem?
and how to deal with it?

[tkc]

hi incle, try assigning points to those who have assisted you. this will encourage more people to participate in the forum. :)

[incle]

thanks your advice.