install everything in /usr

This patch is needed for the /usr-move feature
https://fedoraproject.org/wiki/Features/UsrMove

This package requires now 'filesystem' >= 3, which is only installable
on a system which has /bin, /sbin, /lib, /lib64 as symlinks to /usr and
not regular directories. The 'filesystem' package acts as a guard, to
prevent *this* package to be installed on old unconverted systems.

New installations will have the 'filesystem' >=3 layout right away, old
installations need to be converted with anaconda or dracut first; only
after that, the 'filesystem' package, and also *this* package can be
installed.

Packages *should* not install files in /bin, /sbin, /lib, /lib64, but
only in the corresponding directories in /usr. Packages *must* not
install conflicting files with the same names in the corresponding
directories in / and /usr. Especially compatibilty symlinks must not be
installed.

Feel free to modify any of the changes to the spec file, but keep the
above in mind.

filesystem.spec

@@ -1,6 +1,6 @@
 Summary: The basic directory layout for a Linux system
 Name: filesystem
-Version: 2.4.46
+Version: 3
 Release: 1%{?dist}
 License: Public Domain
 URL: https://fedorahosted.org/filesystem
@@ -12,6 +12,10 @@ Source3: iso_3166.sed
 BuildRequires: iso-codes
 Requires(pre): setup
 
+# old installations; this ensures we can not install the incompatible
+# filesystem.rpm on unconverted systems
+#Requires: rpmlib(X-CheckUnifiedSystemdir) >= 1
+
 %description
 The filesystem package is one of the basic packages that is installed
 on a Linux system. Filesystem contains the basic directory layout
@@ -31,14 +35,18 @@ install -p -c -m755 %SOURCE3 %{buildroot}/iso_3166.sed
 
 cd %{buildroot}
 
-mkdir -p bin boot dev \
+mkdir -p boot dev \
         etc/{X11/{applnk,fontpath.d},xdg/autostart,opt,pm/{config.d,power.d,sleep.d},xinetd.d,skel,sysconfig,pki} \
-        home lib/modules %{_lib}/tls media mnt opt proc root run/lock sbin srv sys tmp \
+        home media mnt opt proc root run/lock srv sys tmp \
-        usr/{bin,etc,games,include,%{_lib}/{games,sse2,tls,X11,pm-utils/{module.d,power.d,sleep.d}},lib/{games,locale,sse2},libexec,local/{bin,etc,games,lib,%{_lib},sbin,src,share/{applications,man/man{1,2,3,4,5,6,7,8,9,n,1x,2x,3x,4x,5x,6x,7x,8x,9x},info},libexec,include,},sbin,share/{aclocal,applications,augeas/lenses,backgrounds,desktop-directories,dict,doc,empty,games,ghostscript/conf.d,gnome,icons,idl,info,man/man{1,2,3,4,5,6,7,8,9,n,1x,2x,3x,4x,5x,6x,7x,8x,9x,0p,1p,3p},mime-info,misc,omf,pixmaps,sounds,themes,xsessions,X11},src,src/kernels,src/debug} \
+        usr/{bin,etc,games,include,%{_lib}/{games,sse2,tls,X11,pm-utils/{module.d,power.d,sleep.d}},lib/{games,locale,modules,sse2},libexec,local/{bin,etc,games,lib,%{_lib},sbin,src,share/{applications,man/man{1,2,3,4,5,6,7,8,9,n,1x,2x,3x,4x,5x,6x,7x,8x,9x},info},libexec,include,},sbin,share/{aclocal,applications,augeas/lenses,backgrounds,desktop-directories,dict,doc,empty,games,ghostscript/conf.d,gnome,icons,idl,info,man/man{1,2,3,4,5,6,7,8,9,n,1x,2x,3x,4x,5x,6x,7x,8x,9x,0p,1p,3p},mime-info,misc,omf,pixmaps,sounds,themes,xsessions,X11},src,src/kernels,src/debug} \
         var/{adm,empty,gopher,lib/{games,misc,rpm-state},local,lock/subsys,log,nis,preserve,run,spool/{mail,lpd,uucp},tmp,db,cache,opt,games,yp}
 
 ln -snf ../var/tmp usr/tmp
 ln -snf spool/mail var/mail
+ln -snf usr/bin bin
+ln -snf usr/sbin sbin
+ln -snf usr/lib lib
+ln -snf usr/%{_lib} %{_lib}
 
 sed -n -f %{buildroot}/iso_639.sed /usr/share/xml/iso-codes/iso_639.xml \
   >%{buildroot}/iso_639.tab
@@ -60,9 +68,9 @@ cat %{SOURCE1} | grep -v "^#" | grep -v "^$" | while read loc ; do
     locale=$loc
     locality=
     special=
-    [[ "$locale" =~ "@" ]] && locale=${locale%%@*}
+    [[ "$locale" =~ "@" ]] && locale=${locale%%%%@*}
     [[ "$locale" =~ "_" ]] && locality=${locale##*_}
-    [[ "$locality" =~ "." ]] && locality=${locality%%.*}
+    [[ "$locality" =~ "." ]] && locality=${locality%%%%.*}
     [[ "$loc" =~ "_" ]] || [[ "$loc" =~ "@" ]] || special=$loc
 
     # If the locality is not official, skip it
@@ -71,7 +79,7 @@ cat %{SOURCE1} | grep -v "^#" | grep -v "^$" | while read loc ; do
     fi
     # If the locale is not official and not special, skip it
     if [ -z "$special" ]; then
-        egrep -q "[[:space:]]${locale%_*}[[:space:]]" \
+        egrep -q "[[:space:]]${locale%%_*}[[:space:]]" \
            %{buildroot}/iso_639.tab || continue
     fi
     echo "%lang(${locale})	/usr/share/locale/${loc}" >> $RPM_BUILD_DIR/filelist
@@ -98,6 +106,29 @@ done
 %clean
 rm -rf %{buildroot}
 
+%pretrans -p <lua>
+--#
+--# If we are running in pretrans in a fresh root, there is no /usr and symlinks.
+--# We cannot be sure, to be the very first rpm in the transaction list,
+--# so, let's create the toplevel symlinks here and the directories they point to.
+--# When our rpm is unpacked by cpio, it will set all permissions and modes later.
+--#
+
+if posix.stat("/usr") == nil then
+    posix.mkdir("/usr")
+end
+
+for i,dir in ipairs({"/lib", "/%{_lib}", "/sbin", "/bin"}) do
+    if posix.stat("/usr"..dir) == nil then
+        posix.mkdir("/usr"..dir)
+        if posix.stat(dir, "mode") == nil then
+            posix.symlink("usr"..dir, dir)
+        end
+    end
+end
+
+return 0
+
 %post -p <lua>
 posix.symlink("../run", "/var/run")
 posix.symlink("../run/lock", "/var/lock")
@@ -105,7 +136,7 @@ posix.symlink("../run/lock", "/var/lock")
 %files -f filelist
 %defattr(0755,root,root,-)
 %dir %attr(555,root,root) /
-%attr(555,root,root) /bin
+/bin
 %attr(555,root,root) /boot
 /dev
 %dir /etc
@@ -118,9 +149,9 @@ posix.symlink("../run/lock", "/var/lock")
 /etc/sysconfig
 /etc/pki
 /home
-%attr(555,root,root) /lib
+/lib
 %ifarch x86_64 ppc ppc64 sparc sparc64 s390 s390x
-%attr(555,root,root) /%{_lib}
+/%{_lib}
 %endif
 /media
 %dir /mnt
@@ -128,7 +159,7 @@ posix.symlink("../run/lock", "/var/lock")
 %attr(555,root,root) /proc
 %attr(550,root,root) /root
 /run
-%attr(555,root,root) /sbin
+/sbin
 /srv
 /sys
 %attr(1777,root,root) /tmp
@@ -196,6 +227,10 @@ posix.symlink("../run/lock", "/var/lock")
 /var/yp
 
 %changelog
+* Wed Jan 25 2012 Harald Hoyer <harald@redhat.com> 3-1
+- install everything in /usr
+  https://fedoraproject.org/wiki/Features/UsrMove
+
 * Thu Jan 12 2012 Ondrej Vasik <ovasik@redhat.com>  2.4.46-1
 - own and create /var/lib/rpm-state (#771713)