Introducing a proper syslog daemon allows us to remove the syslogd stub we have.

1 files changed, 88 insertions, 0 deletions

diff --git a/backend_log.py b/backend_log.py
new file mode 100644
index 000000000..fd11692c9
--- /dev/null
+++ b/backend_log.py
@@ -0,0 +1,88 @@
+# backend_log.py
+# Logging infrastructure for Anaconda's backend.
+#
+# Copyright (C) 2009  Red Hat, Inc.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions of
+# the GNU General Public License v.2, or (at your option) any later version.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY expressed or implied, including the implied warranties of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+# Public License for more details.  You should have received a copy of the
+# GNU General Public License along with this program; if not, write to the
+# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
+# source code or documentation are not subject to the GNU General Public
+# License and may only be used or replicated with the express permission of
+# Red Hat, Inc.
+#
+# Red Hat Author(s): Ales Kozumplik <akozumpl@redhat.com>
+#
+
+import logging
+import os
+import signal
+
+import anaconda_log
+import iutil
+
+SYSLOG_PATH           = '/sbin/rsyslogd'
+SYSLOG_PIDFILE        = '/var/run/rsyslog_backend.pid'
+SYSLOG_CFGFILE        = '/etc/rsyslog_backend.conf'
+
+CFG_TEMPLATE = """
+$ModLoad imuxsock
+$InputUnixListenSocketHostName sysimage
+$AddUnixListenSocket %(socket)s
++sysimage
+*.* %(logfile)s;RSYSLOG_TraditionalFileFormat
+%(remote_syslog)s
+"""
+
+global_log = logging.getLogger("anaconda")
+class BackendSyslog:
+    def __init__(self):
+        pass
+    
+    def build_cfg(self, root, log):
+        socket = "%s/dev/log" % (root, )
+        remote_syslog = ''
+        if anaconda_log.logger.remote_syslog:
+            remote_syslog = "*.* @@%s" % (anaconda_log.logger.remote_syslog, )
+        
+        cfg = CFG_TEMPLATE % {
+            'socket' : socket,
+            'logfile' : log,
+            'remote_syslog' : remote_syslog
+            }
+        with open(SYSLOG_CFGFILE, 'w') as cfg_file:
+            cfg_file.write(cfg)
+
+    def start(self, root, log):
+        """ Start an rsyslogd instance dedicated for the sysimage.
+
+        Other possibility would be to change configuration and SIGHUP the
+        existing instance, but it could lose some of its internal queues and
+        give us problems with remote logging.
+        """
+        self.build_cfg(root, log)
+        args = ['-c', '4', 
+                '-f', SYSLOG_CFGFILE,
+                '-i', str(SYSLOG_PIDFILE)]
+        status = iutil.execWithRedirect(SYSLOG_PATH, args)
+        if status == 0:
+            global_log.info("Backend logger started.")
+        else:
+            global_log.error("Unable to start backend logger")
+    
+    def stop(self):
+        try:
+            with open(SYSLOG_PIDFILE, 'r') as pidfile:
+                pid = int(pidfile.read())
+            os.kill(pid, signal.SIGKILL)
+        except:
+            return
+        global_log.info("Backend logger stopped.")
+
+log = BackendSyslog()