fix for utils.daemonize() as reported in https://fedorahosted.org/func/ticket/58

by goozbach

Couple of things wrong, fd's were getting closed in wrong place, the
call to os.cwd('/') was supposed to be os.chdir('/')

Also try duping the fd's just in case

diff --git a/certmaster/utils.py b/certmaster/utils.py
index 22b0afb..ecebad6 100755 (executable)
--- a/certmaster/utils.py
+++ b/certmaster/utils.py
@@ -32,6 +32,14 @@ import sub_process
 # FIXME: can remove this constant?
 REMOTE_ERROR = "REMOTE_ERROR"
 
+# The standard I/O file descriptors are redirected to /dev/null by default.
+if (hasattr(os, "devnull")):
+    REDIRECT_TO = os.devnull
+else:
+    REDIRECT_TO = "/dev/null"
+
+
+
 
 def trace_me():
     x = traceback.extract_stack()
@@ -44,18 +52,26 @@ def daemonize(pidfile=None):
     Writes the new PID to the provided file name if not None.
     """
 
-#    print pidfile
     pid = os.fork()
     if pid > 0:
         sys.exit(0)
-    os.close(0)
-    os.close(1)
-    os.close(2)
-    os.cwd("/")
+    os.chdir("/")
     os.setsid()
     os.umask(0)
     pid = os.fork()
 
+    os.close(0)
+    os.close(1)
+    os.close(2)
+
+    # based on http://code.activestate.com/recipes/278731/
+    os.open(REDIRECT_TO, os.O_RDWR)    # standard input (0)
+
+    os.dup2(0, 1)                      # standard output (1)
+    os.dup2(0, 2)                      # standard error (2)
+
+
+
     if pid > 0:
         if pidfile is not None:
             open(pidfile, "w").write(str(pid))
@@ -116,7 +132,6 @@ def get_hostname(talk_to_certmaster=True):
         try:
             s = socket.socket()
             s.settimeout(5)
-           # print "server, port", server, port
             s.connect((server, port))
             (intf, port) = s.getsockname()
             remote_hostname = socket.gethostbyaddr(intf)[0]