Comments on: MDB Example: Displaying environment variables of a process http://blog.curthread.org/posts/solaris/mdb/display_envp.html Most advanced OS on the planet Wed, 10 Mar 2010 21:34:29 +0000 http://wordpress.org/?v=2.6.3 By: Eoin Hughes http://blog.curthread.org/posts/solaris/mdb/display_envp.html#comment-108491 Eoin Hughes Mon, 15 Jun 2009 10:17:17 +0000 http://blog.curthread.org/?p=7#comment-108491 Thank you, I found this very helpful. I did noticed one very helpful little thing. When you get the first pointer, if you resolve it to a string immediately, the rest of the values returned by '+' will also be resolved. I deal very rarely with mdb, so I don't know if this is something that should be relied upon to work, but it is very cool: > 0x8044200/X 0x8044200: 8044950 > 8044950/S 0x8044950: _=/usr/bin/rsh > + 0x804495f: ADM_MESSAGES=/var/adm/messages (and + from then on shows me the variable values, without needed a second pass) Thank you, I found this very helpful.

I did noticed one very helpful little thing. When you get the first pointer, if you resolve it to a string immediately, the rest of the values returned by ‘+’ will also be resolved. I deal very rarely with mdb, so I don’t know if this is something that should be relied upon to work, but it is very cool:
> 0×8044200/X
0×8044200: 8044950
> 8044950/S
0×8044950: _=/usr/bin/rsh
> +
0×804495f: ADM_MESSAGES=/var/adm/messages

(and + from then on shows me the variable values, without needed a second pass)

]]> By: Ilya Voronin http://blog.curthread.org/posts/solaris/mdb/display_envp.html#comment-2983 Ilya Voronin Sun, 07 Jan 2007 15:42:25 +0000 http://blog.curthread.org/?p=7#comment-2983 I think that this is a feature of shells, - they use internal structures to store variables. I think that this is a feature of shells, - they use internal structures to store variables.

]]> By: Yong Huang http://blog.curthread.org/posts/solaris/mdb/display_envp.html#comment-2982 Yong Huang Sun, 07 Jan 2007 14:46:15 +0000 http://blog.curthread.org/?p=7#comment-2982 Thanks for this tip, Mr (can't find your name). Do you know any way to find the real running process environment? I mean, your method, as well as /usr/ucb/ps eww and pargs -e, finds the environment of the process when it was created, not as of now. If my shell does export A=B now, all these methods won't detect this new setting. Thanks. -- Yong Huang Thanks for this tip, Mr (can’t find your name). Do you know any way to find the real running process environment? I mean, your method, as well as /usr/ucb/ps eww and pargs -e, finds the environment of the process when it was created, not as of now. If my shell does export A=B now, all these methods won’t detect this new setting. Thanks. — Yong Huang

]]> By: Ilya Voronin http://blog.curthread.org/posts/solaris/mdb/display_envp.html#comment-3 Ilya Voronin Wed, 23 Aug 2006 00:29:00 +0000 http://blog.curthread.org/?p=7#comment-3 Do not mix up "-k" (lower case) and "-K" (upper case) options. mdb with "-K" option will load kmdb and stop kernel execution. "-k" option is a synonym for "mdb /dev/ksyms /dev/kmem" Do not mix up “-k” (lower case) and “-K” (upper case) options. mdb with “-K” option will load kmdb and stop kernel execution. “-k” option is a synonym for “mdb /dev/ksyms /dev/kmem”

]]> By: Alexander Nasonov http://blog.curthread.org/posts/solaris/mdb/display_envp.html#comment-2 Alexander Nasonov Wed, 23 Aug 2006 00:09:00 +0000 http://blog.curthread.org/?p=7#comment-2 It's not clear from your post that mdb -k stops the entire system, doesn't it? It’s not clear from your post that mdb -k stops the entire system, doesn’t it?

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