ps showing [appname] for some things -- how to get whole thing?
Chuck Swiger
cswiger at mac.com
Wed Mar 7 18:34:15 UTC 2007
On Mar 7, 2007, at 2:49 AM, Chad Leigh -- Shire.Net LLC wrote:
> On my 6.1 system I have a script that launches some java programs
> [jdk142] and when I do a "ps -auxwww" I get the whole java command
> line that was used in launching.
>
> On my 6.2 system with jdk15 teh scame scripts launch the same java
> programs but I just get [java] in the ps output. Nothing in the ps
> manpage jumped out at me. I would like to be able to get the whole
> commandline when I do the ps
From the manpage:
When printing using the command keyword, a process that has
exited and
has a parent that has not yet waited for the process (in other
words, a
zombie) is listed as ``<defunct>'', and a process which is
blocked while
trying to exit is listed as ``<exiting>''. If the command
vector cannot
be located (usually because it has not been set, as is the case
of system
processes and/or kernel threads) the command name is printed
within
square brackets. The ps utility makes an educated guess as to
the file
name and arguments given when the process was created by
examining memory
or the swap area. The method is inherently somewhat unreliable
and in
any event a process is entitled to destroy this information, so
the names
cannot be depended on too much. The ucomm (accounting) keyword
can, how-
ever, be depended on.
In other words, the process is allowed to over-write the environment
(aka, the command line args & exported env variables) and that will
prevent ps from reliably returning that info. All you can be sure of
it getting argv[0], which is used for accounting in the ucomm
variable....
--
-Chuck
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