initial commitHEADmaster

1 files changed, 26 insertions, 0 deletions

diff --git a/code/snippets/wait2.rb b/code/snippets/wait2.rb
new file mode 100644
index 0000000..329cbc7
--- /dev/null
+++ b/code/snippets/wait2.rb
@@ -0,0 +1,26 @@
+# We create 5 child processes.
+5.times do
+  fork do
+    # Each generates a random number. If even they exit
+    # with a 111 exit code, otherwise they use a 112 exit code.
+    if rand(5).even?
+      exit 111
+    else
+      exit 112
+    end
+  end
+end
+    
+5.times do
+  # We wait for each of the child processes to exit.
+  pid, status = Process.wait2
+
+  # If the child process exited with the 111 exit code
+  # then we know they encountered an even number.
+  if status.exitstatus == 111
+    puts "#{pid} encountered an even number!"
+  else
+    puts "#{pid} encountered an odd number!"
+  end
+end
+