[PATCH] base-files: allow for more flexibility related to hostname

[PATCH] base-files: allow for more flexibility related to hostname

[Mark Asselstine]

Current logic used to create the /etc/hostname file is fairly
restrictive and doesn't allow for easy customization since the
variable 'hostname' is local to the base-files recipe. Changing
'hostname' to a globally recognized variable which can be overwritten
overcomes these restrictions. Additionally it is not always desirable
to establish a /etc/hostname file, such as when we want to define the
hostname via dhcp or using the kernel command line, so we provide a
mechanism to skip its creation.

Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
---
 meta/conf/local.conf.sample                       |   11 +++++++++++
 meta/recipes-core/base-files/base-files_3.0.14.bb |   15 +++++++--------
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/meta/conf/local.conf.sample b/meta/conf/local.conf.sample
index 5679c03..50696e4 100644
--- a/meta/conf/local.conf.sample
+++ b/meta/conf/local.conf.sample
@@ -43,6 +43,17 @@
 MACHINE ??= "qemux86"
 
 #
+# Hostname
+#
+# The openembedded default is to write a '${sysconfdir}/hostname' file which
+# will have ${MACHINE} as the hostname. If you want to use a different hostname
+# set it here. You may also set this to 'none' which will forgo the creation of
+# the '${sysconfdir}/hostname' file allowing, for example, the hostname to be
+# provided by your dhcp configuration or via the kernel command line.
+#
+#MACHINE_HOSTNAME ?= "none"
+
+#
 # Where to place downloads
 #
 # During a first build the system will download many different source code tarballs
diff --git a/meta/recipes-core/base-files/base-files_3.0.14.bb b/meta/recipes-core/base-files/base-files_3.0.14.bb
index 6bab040..571eded 100644
--- a/meta/recipes-core/base-files/base-files_3.0.14.bb
+++ b/meta/recipes-core/base-files/base-files_3.0.14.bb
@@ -60,10 +60,7 @@ conffiles = "${sysconfdir}/debian_version ${sysconfdir}/host.conf \
              ${sysconfdir}/nsswitch.conf ${sysconfdir}/profile \
              ${sysconfdir}/default"
 
-#
-# set standard hostname, might be a candidate for a DISTRO variable? :M:
-#
-hostname = "openembedded"
+MACHINE_HOSTNAME ?= "openembedded"
 
 BASEFILESISSUEINSTALL ?= "do_install_basefilesissue"
 
@@ -107,10 +104,12 @@ do_install () {
 }
 
 do_install_basefilesissue () {
-	if [ -n "${MACHINE}" -a "${hostname}" = "openembedded" ]; then
-		echo ${MACHINE} > ${D}${sysconfdir}/hostname
-	else
-		echo ${hostname} > ${D}${sysconfdir}/hostname
+	if [ "${MACHINE_HOSTNAME}" != "none" ]; then
+		if [ -n "${MACHINE}" -a "${MACHINE_HOSTNAME}" = "openembedded" ]; then
+			echo ${MACHINE} > ${D}${sysconfdir}/hostname
+		else
+			echo ${MACHINE_HOSTNAME} > ${D}${sysconfdir}/hostname
+		fi
 	fi
 
 	install -m 644 ${WORKDIR}/issue*  ${D}${sysconfdir}  
-- 
1.7.9.5

Re: [PATCH] base-files: allow for more flexibility related to hostname

[Koen Kooi]

Op 27 aug. 2012, om 17:24 heeft Mark Asselstine <mark.asselstine@windriver.com> het volgende geschreven:

> Current logic used to create the /etc/hostname file is fairly
> restrictive and doesn't allow for easy customization since the
> variable 'hostname' is local to the base-files recipe. 

hostname_pn-basefiles_someotheroverride = "foo"

Re: [PATCH] base-files: allow for more flexibility related to hostname

[Mark Asselstine]

On August 28, 2012 08:47:33 Koen Kooi wrote:
> Op 27 aug. 2012, om 17:24 heeft Mark Asselstine 
<mark.asselstine@windriver.com> het volgende geschreven:
> > Current logic used to create the /etc/hostname file is fairly
> > restrictive and doesn't allow for easy customization since the
> > variable 'hostname' is local to the base-files recipe.
> 
> hostname_pn-basefiles_someotheroverride = "foo"

Point taken. Do you object to the attempt at making it less obscure however?

Any thoughts about the second part to this, not creating the /etc/hostname 
file? Without being able to avoid the creation of /etc/hostname the 
initscripts 'init.d/hostname.sh' will set the hostname overwriting what is set 
by the kernel cmdline or dhcp.

Thanks for the feedback,
Mark

Re: [PATCH] base-files: allow for more flexibility related to hostname

[Koen Kooi]

Op 28 aug. 2012, om 15:45 heeft Mark Asselstine <mark.asselstine@windriver.com> het volgende geschreven:

> On August 28, 2012 08:47:33 Koen Kooi wrote:
>> Op 27 aug. 2012, om 17:24 heeft Mark Asselstine 
> <mark.asselstine@windriver.com> het volgende geschreven:
>>> Current logic used to create the /etc/hostname file is fairly
>>> restrictive and doesn't allow for easy customization since the
>>> variable 'hostname' is local to the base-files recipe.
>> 
>> hostname_pn-basefiles_someotheroverride = "foo"
> 
> Point taken. Do you object to the attempt at making it less obscure however?

Yes, since that was the outcome of the discussion in this list not so long ago.