Re: Hidden PIDs in /proc

[Albert Cahalan]

> I allready did it ... infact the second test I posted
> correctly shows the  thread ... but, why ps ax -m does
> *not* show it ??  

It does show the threads, but your "grep" missed them.
The built-in process selection and sorting features
are properly thread-aware.

> uh oh .. my bad ...  but .. my ignorance now ask
> what is the real diff between  -m and -T option for ps ...

-m  process followed by threads, Tru64 SysV style
m   process followed by threads, Tru64 BSD style
-T  grouped threads with TID column, Irix style
-L  grouped threads with LWP (and NLWP maybe), Solaris style
H   loose threads, FreeBSD style

I'll give you a few examples with a 2-thread process.
Note how the m option distinguishes signals that are
pending on a process from signals that are pending on
a thread. (some whitespace has been trimmed out too)
Also, the H option's PID column most likely should show
the thread ID instead; help with FreeBSD 5's thread
and MAC behavior would be appreciated.

$ ps -C clone-once sH
UID PID   PENDING   BLOCKED   IGNORED    CAUGHT STAT TTY   TIME COMMAND         
100 634  00000000  00000000 <00000000  00000001 S    pts/9 0:00 clone-once           
100 634  00000000  00000000 <00000000  00000001 S    pts/9 0:00 clone-once           
$ ps -C clone-once sm
UID PID   PENDING   BLOCKED   IGNORED    CAUGHT STAT TTY   TIME COMMAND         
100 634  00000000         -         -         - -    pts/9 0:00 clone-once           
100   -  00000000  00000000 <00000000  00000001 S    -     0:00 -         
100   -  00000000  00000000 <00000000  00000001 S    -     0:00 -         
$ ps -C clone-once -fm
UID    PID  PPID C STIME TTY       TIME CMD        
albert 634     1 0 20:42 pts/9 00:00:00 clone-once          
albert   -     - 0 20:42 -     00:00:00 -        
albert   -     - 0 20:42 -     00:00:00 -        
$ ps -C clone-once -fT
UID    PID  SPID  PPID C STIME TTY       TIME CMD        
albert 634 16634     1 0 20:42 pts/9 00:00:00 clone-once          
albert 634 16635     1 0 20:42 pts/9 00:00:00 clone-once          
$ ps -C clone-once -fL
UID    PID  PPID   LWP C NLWP STIME TTY       TIME CMD        
albert 634     1 16634 0    2 20:42 pts/9 00:00:00 clone-once          
albert 634     1 16635 0    2 20:42 pts/9 00:00:00 clone-once          
$ 


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