Le lundi 28 février 2011 19:33:57 Benoît Burnichon, vous avez écrit :
>
> How could I tell ipkg not to overwrite the already present configuration
> files? I know there is an option when building ipkgs to indicate that
> files are config ones (conffiles in CONTROL directory of the ipk). And how
> to indicate ptxdist that there are some prerm, postrm, preinst and
> postinst scripts?
>
>
> Thanks for your help.
>
> Ben
To add files to conffile, we created new make macros (ptxdist 1.x):
#
# install_control
#
# Installs a file in the control section of the package
#
#
# $1: packet label
# $2: source
# $3: destination file, either preinst, postinst, prerm or postrm
#
install_control =
\
PKG=$(strip $(1));
\
SRC=$(strip $(2));
\
DST=$(strip $(3));
\
echo "install_control:";
\
echo " src=$$SRC";
\
echo " dst=$$DST";
\
if [ "$$DST" != "preinst" -a "$$DST" != "postinst" ]; then
\
if [ "$$DST" != "prerm" -a "$$DST" != "postrm" ]; then
\
echo "Error: install_control failed : $$DST not valid !";
\
exit 1;
\
fi;
\
fi;
\
chmod u+x $$SRC;
\
$(INSTALL) -m 0750 $$SRC $(IMAGEDIR)/$$PKG/ipkg/CONTROL/$$DST;
\
if [ $$? -ne 0 ]; then
\
echo "Error: install_control failed!";
\
exit 1;
\
fi;
\
echo "done";
#
# install_conffile
#
# Flags a file as a configuration file in package
# This enables updating a packet without overwriting existing
# configuration
#
#
# $1: packet label
# $2: dest
#
install_conffile =
\
PKG=$(strip $(1));
\
DST=$(strip $(2));
\
echo "install_conffile:";
\
echo " dst=$$DST";
\
grep $$DST $(IMAGEDIR)/$$PKG/ipkg/CONTROL/conffiles ||
\
echo $$DST >> $(IMAGEDIR)/$$PKG/ipkg/CONTROL/conffiles;
\
if [ $$? -ne 0 ]; then
\
echo "Error: install_conffile failed : " $$?;
\
exit 1;
\
fi;
\
echo "done";
The point is that updating a packet basically boils down to uninstalling the
old one and installing the new one. In this case, the modified conf files are
not preserved.
We did not face the issue of preserving modified files, as the first upgrade
we needed to do was to introduce the ability to modify some conf files which
were static before.
In your case, I would try to insert new fake packets depending on the main
packets with preinst rules that copy the conf files in some safe place. Then
when upgrading, the new main packages are updated and their conf files
overwritten, but just after the new fake packets'postinst rule copies them
back with their original content. Once the files are correctly tagged as
conffiles the fake packet is no longer needed and can be discarded
Hope this helps,
Jean-Noël Avila
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