[oe] [meta-oe][PATCH] rsyslog: add UPDATE_ALTERNATIVE for syslog-service

[Qi.Chen at windriver.com]

From: Chen Qi <Qi.Chen at windriver.com>

Use ALTERNATIVE mechanism in OE to manage the syslog service to
avoid conflicts with other syslog implementations like sysklogd
or busybox.

Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
---
 meta-oe/recipes-extended/rsyslog/rsyslog_7.4.4.bb |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/meta-oe/recipes-extended/rsyslog/rsyslog_7.4.4.bb b/meta-oe/recipes-extended/rsyslog/rsyslog_7.4.4.bb
index 6ee571e..143e1c6 100644
--- a/meta-oe/recipes-extended/rsyslog/rsyslog_7.4.4.bb
+++ b/meta-oe/recipes-extended/rsyslog/rsyslog_7.4.4.bb
@@ -97,9 +97,16 @@ RDEPENDS_${PN} += "logrotate"
 
 # no syslog-init for systemd
 python () {
-    if 'sysvinit' in d.getVar("DISTRO_FEATURES", True).split():
+    if bb.utils.contains('DISTRO_FEATURES', 'sysvinit', True, False, d):
         pn = d.getVar('PN', True)
         sysconfdir = d.getVar('sysconfdir', True)
         d.appendVar('ALTERNATIVE_%s' % (pn), ' syslog-init')
         d.setVarFlag('ALTERNATIVE_LINK_NAME', 'syslog-init', '%s/init.d/syslog' % (sysconfdir))
+        d.setVarFlag('ALTERNATIVE_TARGET', 'syslog-init', '%s/init.d/syslog.%s' % (d.getVar('sysconfdir', True), d.getVar('BPN', True)))
+
+    if bb.utils.contains('DISTRO_FEATURES', 'systemd', True, False, d):
+        pn = d.getVar('PN', True)
+        d.appendVar('ALTERNATIVE_%s' % (pn), ' syslog-service')
+        d.setVarFlag('ALTERNATIVE_LINK_NAME', 'syslog-service', '%s/systemd/system/syslog.service' % (d.getVar('sysconfdir', True)))
+        d.setVarFlag('ALTERNATIVE_TARGET', 'syslog-service', '%s/system/rsyslog.service' % (d.getVar('systemd_unitdir', True)))
 }
-- 
1.7.9.5