Update logmgmt to use python3

This reverts commit 115332ef6b.

Change python to python3 about script and spec
fix log runtime errors in python3 env
1. layer build OK
2. logmgmt.service running and stop ok
3. log rotate and force rotate ok
4. logmgmt manage and delete monitored or unmonitored log ok
5. logmgmgt.log back up ok

Story: 2007106
Task: 39288
Depends-on: https://review.opendev.org/#/c/728323/
Depends-on: https://review.opendev.org/#/c/728325/
Signed-off-by: Long Li <lilong-neu@neusoft.com>
Signed-off-by: SidneyAn <ran1.an@intel.com>
Change-Id: I08d6396922cea2d8d4d485f3cc66f522f6579f2e

utilities/logmgmt/centos/build_srpm.data

@@ -1,4 +1,4 @@
 SRC_DIR="logmgmt"
 COPY_LIST_TO_TAR="scripts"
 COPY_LIST="$SRC_DIR/LICENSE"
-TIS_PATCH_VER=4
+TIS_PATCH_VER=5

utilities/logmgmt/centos/logmgmt.spec

@@ -9,12 +9,13 @@ URL: unknown
 Source0: %{name}-%{version}.tar.gz
 Source1: LICENSE
 
-BuildRequires: python-setuptools
-BuildRequires: python2-pip
-BuildRequires: python2-wheel
+BuildRequires: python3-setuptools
+BuildRequires: python3-pip
+BuildRequires: python3-wheel
 BuildRequires: systemd-devel
+BuildRequires: python3-devel
 Requires: systemd
-Requires: python-daemon
+Requires: python3-daemon
 
 %description
 Management of /var/log filesystem
@@ -22,7 +23,7 @@ Management of /var/log filesystem
 %define local_bindir /usr/bin/
 %define local_etc_initd /etc/init.d/
 %define local_etc_pmond /etc/pmon.d/
-%define pythonroot /usr/lib64/python2.7/site-packages
+%define pythonroot %{python3_sitearch}
 
 %define debug_package %{nil}
 
@@ -33,11 +34,11 @@ Management of /var/log filesystem
 rm -rf *.egg-info
 
 %build
-%{__python} setup.py build
-%py2_build_wheel
+%{__python3} setup.py build
+%{__python3} setup.py bdist_wheel
 
 %install
-%{__python} setup.py install --root=$RPM_BUILD_ROOT \
+%{__python3} setup.py install --root=$RPM_BUILD_ROOT \
                              --install-lib=%{pythonroot} \
                              --prefix=/usr \
                              --install-data=/usr/share \
@@ -74,8 +75,8 @@ rm -rf $RPM_BUILD_ROOT
 %{_unitdir}/logmgmt.service
 %dir %{pythonroot}/%{name}
 %{pythonroot}/%{name}/*
-%dir %{pythonroot}/%{name}-%{version}.0-py2.7.egg-info
-%{pythonroot}/%{name}-%{version}.0-py2.7.egg-info/*
+%dir %{pythonroot}/%{name}-%{version}.0-py3.6.egg-info
+%{pythonroot}/%{name}-%{version}.0-py3.6.egg-info/*
 
 %package wheels
 Summary: %{name} wheels

utilities/logmgmt/logmgmt/logmgmt/logmgmt.py

@@ -42,7 +42,7 @@ LOGROTATE_PERIOD = 600  # Every ten minutes
 ###################
 def start_polling():
     logmgmt_daemon = LogMgmtDaemon()
-    logmgmt_runner = runner.DaemonRunner(logmgmt_daemon)
+    logmgmt_runner = MyDaemonRunner(logmgmt_daemon)
     logmgmt_runner.daemon_context.umask = 0o022
     logmgmt_runner.do_action()
 
@@ -57,6 +57,18 @@ def handle_exception(exc_type, exc_value, exc_traceback):
 ###################
 # CLASSES
 ###################
+class MyDaemonRunner(runner.DaemonRunner):
+    # Workaround: fix the "unbuffered bytes I/O for py3" runtime
+    # error in pyhon3 env.
+    def _open_streams_from_app_stream_paths(self, app):
+        self.daemon_context.stdin = open(app.stdin_path, 'rt')
+        self.daemon_context.stdout = open(app.stdout_path, 'w+t')
+        try:
+            self.daemon_context.stderr = open(app.stderr_path, 'w+t', buffering=0)
+        except:
+            self.daemon_context.stderr = open(app.stderr_path, 'wb+', buffering=0)
+
+
 class LogMgmtDaemon():
     """Daemon process representation of the /var/log monitoring program"""
     def __init__(self):
@@ -122,7 +134,7 @@ class LogMgmtDaemon():
             output = subprocess.check_output(['/usr/sbin/logrotate', '-d', '/etc/logrotate.conf'],
                                              stderr=subprocess.STDOUT)
 
-            for line in output.split('\n'):
+            for line in output.decode().split('\n'):
                 fields = line.split()
                 if len(fields) > 0 and fields[0] == "considering":
                     self.monitored_files.extend(glob.glob(fields[2]))
@@ -140,7 +152,7 @@ class LogMgmtDaemon():
         try:
             output = subprocess.check_output(['find', '/var/log', '-type', 'f'])
 
-            for fname in output.split('\n'):
+            for fname in output.decode().split('\n'):
                 if fname in self.monitored_files:
                     continue
 

utilities/logmgmt/logmgmt/setup.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Copyright (c) 2014 Wind River Systems, Inc.

utilities/logmgmt/scripts/bin/logmgmt

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Copyright (c) 2014 Wind River Systems, Inc.

utilities/logmgmt/scripts/bin/logmgmt_postrotate

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Copyright (c) 2014 Wind River Systems, Inc.

utilities/logmgmt/scripts/bin/logmgmt_prerotate

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """
 Copyright (c) 2014 Wind River Systems, Inc.