postfix.inc: fix start postfix failed while hostname is numeric

While hostname is numeric, start postfix failed
...
root@qemux86-64:~# hostname 1.2.3.4
root@qemux86-64:~# systemctl restart postfix
|Job for postfix.service failed because the control process exited
with error code. See "systemctl status postfix.service" and
"journalctl -xe" for details.

root@qemux86-64:~# systemctl status postfix -l
Dec 02 08:05:40 1.2.3.4 aliasesdb[535]: /usr/sbin/postconf: fatal: unable to use my own hostname
Dec 02 08:05:41 1.2.3.4 aliasesdb[535]: newaliases: warning: valid_hostname: numeric hostname: 1.2.3.4
Dec 02 08:05:41 1.2.3.4 postfix/sendmail[537]: warning: valid_hostname: numeric hostname: 1.2.3.4
Dec 02 08:05:41 1.2.3.4 aliasesdb[535]: newaliases: fatal: unable to use my own hostname
Dec 02 08:05:42 1.2.3.4 postfix[540]: warning: valid_hostname: numeric hostname: 1.2.3.4
Dec 02 08:05:42 1.2.3.4 postfix[540]: fatal: unable to use my own hostname
...

Refer meta/recipes-core/initscripts/initscripts-1.0/hostname.sh in oe-core,
add check_hostname.sh and invoke it before postfix start, if the hostname
is invalid, set "localhost" to main.cf.

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/meta-networking/recipes-daemons/postfix/files/check_hostname.sh b/meta-networking/recipes-daemons/postfix/files/check_hostname.sh
new file mode 100755
index 0000000000..37a0dd088c
--- /dev/null
+++ b/meta-networking/recipes-daemons/postfix/files/check_hostname.sh
@@ -0,0 +1,13 @@
+#! /bin/sh
+
+HOSTNAME=$(/bin/hostname)
+
+if [ -z "$HOSTNAME" -o "$HOSTNAME" = "(none)" -o ! -z "`echo $HOSTNAME | sed -n '/^[0-9]*\.[0-9].*/p'`" ]; then
+        # If hostname is invalid, and myhostname not existed in main.cf
+        /usr/sbin/postconf -h "myhostname" 2>/dev/null
+        if [ $? -ne 0 ]; then
+                # Set "localhost" to main.cf
+                /usr/sbin/postconf -e "myhostname=localhost"
+        fi
+fi
+