Is it possible for a program or a shell script to query from the
system what runlevel it's in?


Thanks.

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themf@graffiti.net (Mister Anon) writes:

> Is it possible for a program or a shell script to query from the
> system what runlevel it's in?
>

Depends. Some systems provide this information in 'who -r', some don't
(e.g. some distributions of Linux).

Dragan

--
Dragan Cvetkovic,

To be or not to be is true. G. Boole      No it isn't.  L. E. J. Brouwer

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themf@graffiti.net (Mister Anon) writes:

> Is it possible for a program or a shell script to query from the
> system what runlevel it's in?
>
>
> Thanks.

Try "ps -ef | grep init".
on some (most ?) systems, the runlevel is written like
init [2]

Uli

--
'''
(0 0)
+------oOO----(_)--------------+
|                              |
|         Ulrich Herbst        |
|                              |
|      Ulrich.Herbst@gmx.de    |
+-------------------oOO--------+
|__|__|
|| ||
ooO Ooo

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Mister Anon wrote:

> Is it possible for a program or a shell script to query from the
> system what runlevel it's in?
>
>
> Thanks.

I don't know what OS you are using, but with Mandrake Linux there is
"runlevel" or "who -r" in solaris.

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matt_left_coast <Not@given.org> writes:

> Mister Anon wrote:
> 
>
> I don't know what OS you are using, but with Mandrake Linux there is
> "runlevel" or "who -r" in solaris.

"who -r" works also on AIX and most modern Linux distros (old RH based
distros didn't accept who -r and therefore had need for, above mentioned,
runlevel command).

Of course, BSDes don't have 'who -r' as they don't have a concept of run
levels.

Dragan

--
Dragan Cvetkovic,

To be or not to be is true. G. Boole      No it isn't.  L. E. J. Brouwer

!!! Sender/From address is bogus. Use reply-to one !!!

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Keith Thompson <kst-u@mib.org> writes:

> Ulrich Herbst <ulrich.herbst@gmx.de> writes: 
>
> Not on most of the systems I've tried.  I see it on my Fedora Core 2
> system, but not on Red Hat (several versions), Solaris, or AIX.
>
OK,
"ps -ef | grep init" does work on:
RH9: yes
Debian: yes
RH EL4: yes
AIX: no
HP/UX 11: no
Solaris: no
Irix: no

=> "ps -ef | grep init" seems to work on many linux systems, but not
on many commercial unixes.

Uli

--
'''
(0 0)
+------oOO----(_)--------------+
|                              |
|         Ulrich Herbst        |
|                              |
|      Ulrich.Herbst@gmx.de    |
+-------------------oOO--------+
|__|__|
|| ||
ooO Ooo

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Ulrich Herbst <ulrich.herbst@gmx.de> writes:

> Keith Thompson <kst-u@mib.org> writes:
> 
[vbcol=seagreen] 
> OK,
> "ps -ef | grep init" does work on:
> RH9: yes

Not on our RH9 system either:

hector$ /bin/ps -fe | grep '[i]'nit
root         1     0  0 Mar30 ?        00:00:04 init
hector$ cat /etc/issue
Red Hat Linux release 9 (Shrike)
Kernel \r on an \m

hector$ uname -r
2.4.20-35_39.rh9.at

> Debian: yes
> RH EL4: yes
> AIX: no
> HP/UX 11: no
> Solaris: no
> Irix: no
>
> => "ps -ef | grep init" seems to work on many linux systems, but not
> on many commercial unixes.

In other words, it works nowhere except on (some) Linux systems :-)

'who -r' is more common.

Dragan

--
Dragan Cvetkovic,

To be or not to be is true. G. Boole      No it isn't.  L. E. J. Brouwer

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