[PD] setuid root problem: "failed to map segment from shared object: Resource temporarily unavailable"

[derek holzer]

Hi gang,

just recommended Wade try the "chown root/chmod u+s" trick, and now it 
see it causes me some headaches that weren't there before.

I was also unable to run pd -rt with realtime-lsm as a user, but *only* 
on my laptop. I must have done something different to my dekstop a while 
back, but who knows what that was!!! I also could not connect a "sudo pd 
-rt" to a "qjackctl" running RT as a user. I did not get a failure 
connect segfault, but I'm also not running pd 0.38 [only pd 0.37-4].

So, to cut to the chase...after doing this:

chown root /usr/local/bin/pd
chmod u+s /usr/local/bin/pd

and running pd -rt, I get some problems loading externals:

priority 8 scheduling enabled.
memory locking enabled.
priority 6 scheduling enabled.
memory locking enabled.
zexy: can't load library
/usr/local/lib/pd/extra/iemlib1.pd_linux: 
/usr/local/lib/pd/extra/iemlib1.pd_linux: failed to map segment from 
shared object: Resource temporarily unavailable
iemlib1: can't load library
/usr/local/lib/pd/extra/iemlib2.pd_linux: 
/usr/local/lib/pd/extra/iemlib2.pd_linux: failed to map segment from 
shared object: Resource temporarily unavailable
iemlib2: can't load library
/usr/local/lib/pd/extra/iem_mp3.pd_linux: 
/usr/local/lib/pd/extra/iem_mp3.pd_linux: failed to map segment from 
shared object: Resource temporarily unavailable
iem_mp3: can't load library
iem_t3_lib (R-1.15) library loaded!

But this problem does not occur when I do not run -rt.

Curiously, iem_t3_lib  loads, even though all have the same permissions:

-rwxr-xr-x  1 root  root  17176 Jan  3 16:52 iem_t3_lib.pd_linux
-rwxr-xr-x  1 root  root  71364 Jan  3 16:54 iemlib1.pd_linux
-rwxr-xr-x  1 root  root  99664 Jan  3 16:52 iemlib2.pd_linux
-rwxr-xr-x  1 root  root  69388 Jan  3 16:52 iem_mp3.pd_linux

Can anyone explain this one?
d.

-- 
derek holzer ::: http://www.umatic.nl
---Oblique Strategy # 36:
"Consult other sources
-promising
-unpromising"