* Re: init dies after reboot
2004-03-02 16:54 ` Richard B. Johnson
@ 2004-03-03 7:50 ` Anonymous
2004-03-03 9:00 ` Anonymous
1 sibling, 0 replies; 4+ messages in thread
From: Anonymous @ 2004-03-03 7:50 UTC (permalink / raw)
To: root; +Cc: linux-kernel
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Thanks for answer, but the thing with core is
imposible as I said that there is no /proc/1 dir :(
--- "Richard B. Johnson" <root@chaos.analogic.com>
wrote:
> On Tue, 2 Mar 2004, Anonymous wrote:
>
> > Hello
> >
> > I encountered a strange problem, and i'm not sure
> that
> > it originates or not in the kernel.
> > the probl. is that on many slack boxes init dies
> after
> > some time, but the OS is still up and running.
> > if I 'ps aux' the machine,no init, and /proc/1
> doesn't
> > exist.
> > although, `lsof | grep init` shows:init 1
> > root cwd DIR 8,3 472 2 /
> > init 1 root rtd DIR 8,3
> > 472 2 /
> > init 1 root txt REG 8,3
> > 468916 15607 /sbin/init
> > init 1 root 0r CHR 1,3
> > 5659 /dev/null
> > init 1 root 1u CHR 1,3
> > 5659 /dev/null
> > init 1 root 2u CHR 1,3
> > 5659 /dev/null
> > init 1 root 10u FIFO 8,3
> > 137774 /dev/initctl
> >
> >
> > Any kind of ideea?
> >
> > Thanks,
> > Uwe Bower
>
> The kernel will never send a signal 9 to init.
> However, it can
> send many other signals. If the signal handler in
> init got
> corrupt from a buffer overrun, bad memory, etc.,
> it's quite
> possible for init to die. When it dies, it would
> usually
> die as a result of a seg-fault. You can observe
> /proc/1/cwd to
> see where init lives. There may be a core-file in
> that directory.
> The core-file might be able to give you a hint.
> Also, somebody
> who has su privs can `cp /dev/random /dev/initctl`
> with some
> interesting results.
>
> Cheers,
> Dick Johnson
> Penguin : Linux version 2.4.24 on an i686 machine
> (797.90 BogoMips).
> Note 96.31% of all statistics are
> fiction.
>
>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: init dies after reboot
2004-03-02 16:54 ` Richard B. Johnson
2004-03-03 7:50 ` Anonymous
@ 2004-03-03 9:00 ` Anonymous
1 sibling, 0 replies; 4+ messages in thread
From: Anonymous @ 2004-03-03 9:00 UTC (permalink / raw)
To: root; +Cc: linux-kernel
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
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On the other hand, I've made a strace on "/sbin/init
U" for example, wich is supposed to restart the init
process. On a slack box with init running I got:
execve("/sbin/init", ["/sbin/init", "U"], [/* 28 vars
*/]) = 0
fcntl64(0, F_GETFD) = 0
fcntl64(1, F_GETFD) = 0
fcntl64(2, F_GETFD) = 0
geteuid32() = 0
getuid32() = 0
getegid32() = 0
getgid32() = 0
brk(0) = 0x80bb000
brk(0x80bc000) = 0x80bc000
umask(022) = 022
geteuid32() = 0
getpid() = 2509
rt_sigaction(SIGALRM, {0x8048980, [], 0x4000000},
NULL, 8) = 0
alarm(3) = 0
open("/dev/initctl", O_WRONLY) = 3
write(3,
"i\31\t\3\1\0\0\0U\0\0\0\5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
384) = 384
close(3) = 0
alarm(0) = 3
semget(IPC_PRIVATE, 0, 0)
...and init is restarted
And on a slack box *without* init I got:
execve("/sbin/init", ["/sbin/init", "u"], [/* 28 vars
*/]) = 0
fcntl64(0, F_GETFD) = 0
fcntl64(1, F_GETFD) = 0
fcntl64(2, F_GETFD) = 0
geteuid32() = 0
getuid32() = 0
getegid32() = 0
getgid32() = 0
brk(0) = 0x80baeb4
brk(0x80bbeb4) = 0x80bbeb4
brk(0x80bc000) = 0x80bc000
umask(022) = 022
geteuid32() = 0
getpid() = 23212
rt_sigaction(SIGALRM, {0x8048980, [], 0x4000000},
NULL, 8) = 0
alarm(3) = 0
open("/dev/initctl", O_WRONLY) = 3
write(3,
"i\31\t\3\1\0\0\0u\0\0\0\5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
384) = 384
close(3) = 0
alarm(0) = 3
semget(IPC_PRIVATE, 0, 0) = -1 ENOSYS
(Function not implemented)
_exit(0) = ?
...and, of course init is not restarted...
i still don't have more clues...:-/
--- "Richard B. Johnson" <root@chaos.analogic.com>
wrote:
> On Tue, 2 Mar 2004, Anonymous wrote:
>
> > Hello
> >
> > I encountered a strange problem, and i'm not sure
> that
> > it originates or not in the kernel.
> > the probl. is that on many slack boxes init dies
> after
> > some time, but the OS is still up and running.
> > if I 'ps aux' the machine,no init, and /proc/1
> doesn't
> > exist.
> > although, `lsof | grep init` shows:init 1
> > root cwd DIR 8,3 472 2 /
> > init 1 root rtd DIR 8,3
> > 472 2 /
> > init 1 root txt REG 8,3
> > 468916 15607 /sbin/init
> > init 1 root 0r CHR 1,3
> > 5659 /dev/null
> > init 1 root 1u CHR 1,3
> > 5659 /dev/null
> > init 1 root 2u CHR 1,3
> > 5659 /dev/null
> > init 1 root 10u FIFO 8,3
> > 137774 /dev/initctl
> >
> >
> > Any kind of ideea?
> >
> > Thanks,
> > Uwe Bower
>
> The kernel will never send a signal 9 to init.
> However, it can
> send many other signals. If the signal handler in
> init got
> corrupt from a buffer overrun, bad memory, etc.,
> it's quite
> possible for init to die. When it dies, it would
> usually
> die as a result of a seg-fault. You can observe
> /proc/1/cwd to
> see where init lives. There may be a core-file in
> that directory.
> The core-file might be able to give you a hint.
> Also, somebody
> who has su privs can `cp /dev/random /dev/initctl`
> with some
> interesting results.
>
> Cheers,
> Dick Johnson
> Penguin : Linux version 2.4.24 on an i686 machine
> (797.90 BogoMips).
> Note 96.31% of all statistics are
> fiction.
>
>
__________________________________
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Yahoo! Search - Find what you’re looking for faster
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^ permalink raw reply [flat|nested] 4+ messages in thread