From: ts <decoux@...>
Date: 2008-02-10T20:38:26+09:00
Subject: Re: Possibly a timeout related problem

>>>>> "D" == Dave Thomas <dave@pragprog.com> writes:

D> Setting up a sleep seems to interfere with signal handlers.

 Well, it seems that it's the opposite : sending a signal interfere with
 sleep. 

 This is because the parent process receive SIGCHLD that it interrupt the
 sleep, no ?

vgs% cat b.rb
trap("CLD") do
   pid = Process.wait
   puts "Child pid #{pid}: terminated"
end

exec("/bin/sh -c 'echo hello'") if fork.nil?

puts "start"
sleep 12
puts "done"
vgs% emacs -nw b.rb
vgs% cat b.rb
trap("CLD") do
   pid = Process.wait
   puts "Child pid #{pid}: terminated"
end

exec("/bin/sh -c 'echo hello'") if fork.nil?

puts "start"
sleep 2
puts "done"
vgs% 

vgs% ./ruby -v b.rb
ruby 1.9.0 (2008-02-09 revision 15320) [i686-linux]
start
hello
Child pid 9185: terminated
done
vgs% 


Guy Decoux