Solaris ptree equivalent command in Linux

Solaris ptree command produces something like:

159 /usr/sbin/inetd -s
26072 in.telnetd
26074 -ksh
4771 /usr/local/bin/ksh trap11.ksh
4772 /usr/local/bin/ksh trap11.ksh
4773 /usr/local/bin/ksh trap11.ksh
4774 /bin/sleep 1

I need Linux equivalent. ps --forest -eaf works, but
I have to get ALL PIDs. Why ps --forest --pid does not work?

pstree -a -p works some what, but if you gives a child ID, it does
show the whole tree. -H would get the whole PIDs in the system.

What is the closest match to solaris simple ptree command output?
--
Michael Wang * http://www.unixlabplus.com/ * mwang@unixlabplus.com

On Wed, 30 Jul 2003 23:44:33 +0200, Peter T. Breuer wrote:

>> pstree -a -p works some what,

> It works perfectly. Why the "-a"?

To include command-line arguments, which Solaris ptree evidently does.

>> but if you gives a child ID, it does
>> show the whole tree. -H would get the whole PIDs in the system.

> Mind rephrasing your question in better english? I don't see what
> pstree -p doesn't get you.

More specifically:

'pstree -a -p 123' will show process 123 and its descendants, with
arguments and process IDs.

'pstree -a -p -H 123' will show all processes, with arguments and
process IDs, and with process 123 and its ancestors highlighted.

In article <18e9gb.00l.ln@news.it.uc3m.es>,
Peter T. Breuer <ptb@oboe.it.uc3m.es> wrote:
>Michael Wang <mwang@unixlabplus.com> wrote:
>> Solaris ptree command produces something like:
>
>> 159 /usr/sbin/inetd -s
>> 26072 in.telnetd
>> 26074 -ksh
>> 4771 /usr/local/bin/ksh trap11.ksh
>> 4772 /usr/local/bin/ksh trap11.ksh
>> 4773 /usr/local/bin/ksh trap11.ksh
>> 4774 /bin/sleep 1
>
>> I need Linux equivalent. ps --forest -eaf works, but
>> I have to get ALL PIDs. Why ps --forest --pid does not work?
>
>It does.
>
>
>> pstree -a -p works some what, but if you gives a child ID, it does
>
>It works perfectly. Why the "-a"?
>
>> show the whole tree. -H would get the whole PIDs in the system.
>
>Mind rephrasing your question in better english? I don't see what
>pstree -p doesn't get you.

Considering this tree:

root 1659 1 0 Jul06 ? 00:00:20 /usr/sbin/sshd
root 1835 1659 0 Jul06 ? 00:00:00 \_ /usr/sbin/sshd
root 1837 1835 0 Jul06 pts/0 00:00:00 | \_ -dtksh
root 3716 1659 0 20:45 ? 00:00:01 \_ /usr/sbin/sshd
root 3719 3716 0 20:46 pts/1 00:00:02 \_ -bash

[root@localhost tmp]# ps --forest --pid 3719 | more
PID TTY TIME CMD
3719 pts/1 00:00:02 bash

does not get me the tree.

[root@localhost tmp]# pstree -a -p 3719
bash,3719
`-pstree,3869 -a -p 3719

does not give the tree either.

They just give me a branch.

while ps --forest -eaf gives the whole forest.

So on Linux, I either get a branch (too little) or a forest (too much).
I need a tree like what shown at the beginning.
--
Michael Wang * http://www.unixlabplus.com/ * mwang@unixlabplus.com

On Thu, 31 Jul 2003 01:45:23 +0000, Michael Wang wrote:

> Considering this tree:
>
> root 1659 1 0 Jul06 ? 00:00:20 /usr/sbin/sshd
> root 1835 1659 0 Jul06 ? 00:00:00 \_ /usr/sbin/sshd
> root 1837 1835 0 Jul06 pts/0 00:00:00 | \_ -dtksh
> root 3716 1659 0 20:45 ? 00:00:01 \_ /usr/sbin/sshd
> root 3719 3716 0 20:46 pts/1 00:00:02 \_ -bash
>
> [root@localhost tmp]# ps --forest --pid 3719 | more
> PID TTY TIME CMD
> 3719 pts/1 00:00:02 bash
>
> does not get me the tree.
>
> [root@localhost tmp]# pstree -a -p 3719
> bash,3719
> `-pstree,3869 -a -p 3719
>
> does not give the tree either.
>
> They just give me a branch.
>
> while ps --forest -eaf gives the whole forest.
>
> So on Linux, I either get a branch (too little) or a forest (too much).
> I need a tree like what shown at the beginning.

You have to specify the root of the tree. 'pstree -a -p 1659' will
give you what you want.

Or do you want to specify a descendant and display the tree rooted at
its second-oldest ancestor? Here's some plumbing for you:

#!/bin/sh
pstree -a -p `pstree -a -p -H $1 | grep '1m.*0m' | head -2 | tail +2 | sed -e
's/^.*,//' -e 's/).*$//'`

Save this as a text file ~/bin/ptree (assuming ~/bin is in your PATH)

Note that it is two lines long, with a very long second line (which may
wrap in your newsreader).

'chmod o+x ~/bin/ptree'

Now you can 'ptree 3719' and get what you want.

1m is part of ANSI highlight-on; 0m is part of ANSI highlight-off.

It works on my system, at least. I'm sure it could be improved in any
number of ways, but it's good enough for light interactive use.