runaway zselect

[Atom Smasher <atom@smasher.org>]

i would expect zselect to return an error and stop the while loop when "w" 
stops producing output. instead i'm seeing an infinite loop of blank 
lines, after "w" finishes:

while zselect -r 0
do
   read -r foo
   print -r -- $foo
done < <( w )

same thing reading from a coproc with "done <& p"

the weird thing is that i have it working as desired (reading from a 
coproc) in a script, but i can't reproduce it outside of the script... the 
weirder thing is that i can get this working when i test it:
 	sysread -i 0 -o 1 -t 200 <& p
  but in the script mentioned above, it fails:
 	coprocess: bad file descriptor

any ideas? thanks...


-- 
         ...atom

  ________________________
  http://atom.smasher.org/
  762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
  -------------------------------------------------

 	"People have so manipulated the concept of freedom that it
 	 finally boils down to the right of the stronger and richer to
 	 take from the weaker and poorer whatever they still have."
 		-- Theodor Adorno