Bug#571054: Divert /sbin/initctl to fix start(8) in lucid postinsts.

[Trent W. Buck]

Package: pbuilder
Version: 0.196
Severity: normal

pbuilder currently creates a policy-rc.d that prevents daemons from
starting when they are installed to satisfy build dependencies.  This
works well for sysvinit packages.

However, when working with Ubuntu Lucid[0] chroots, many daemons use
upstart instead of sysvinit.  Thus, they ignore policy-rc.d, try (and
fail) to start, further causing the postinst, dpkg, satisfybuildepends
and ultimately the entire pdebuild to fail.

According to CJ Watson of #ubuntu-devel, this can be done by diverting
/sbin/initctl and substituting a stub.  An example of this can be seen
in debootstrap's "gutsy" script (excerpt below).  Please add something
similar, I guess to /usr/lib/pbuilder/pbuilder-modules:mountproc.

        mv "$TARGET/sbin/start-stop-daemon" "$TARGET/sbin/start-stop-daemon.REAL"
        echo \
    "#!/bin/sh
    echo
    echo \"Warning: Fake start-stop-daemon called, doing nothing\"" > "$TARGET/sbin/start-stop-daemon"
        chmod 755 "$TARGET/sbin/start-stop-daemon"

        if [ -x "$TARGET/sbin/initctl" ]; then
          mv "$TARGET/sbin/initctl" "$TARGET/sbin/initctl.REAL"
          echo \
    "#!/bin/sh
    echo
    echo \"Warning: Fake initctl called, doing nothing\"" > "$TARGET/sbin/initctl"
          chmod 755 "$TARGET/sbin/initctl"
        fi

[0] In theory this was an issue with earlier Ubuntu releases, but it
    seems to be far more prevalent in Lucid.

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.24-23-openvz (SMP w/4 CPU cores)
Locale: LANG=en_AU.utf8, LC_CTYPE=en_AU.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages pbuilder depends on:
ii  cdebootstrap                  0.5.5      Bootstrap a Debian system
ii  coreutils                     8.4-1      GNU core utilities
ii  debconf [debconf-2.0]         1.5.28     Debian configuration management sy
ii  debianutils                   3.2.2      Miscellaneous utilities specific t
ii  debootstrap                   1.0.20     Bootstrap a basic Debian system
ii  wget                          1.12-1.1   retrieves files from the web

Versions of packages pbuilder recommends:
ii  devscripts                    2.10.61    scripts to make the life of a Debi
ii  fakeroot                      1.14.4-1   Gives a fake root environment
ii  sudo                          1.7.2p1-1  Provide limited super user privile

Versions of packages pbuilder suggests:
pn  cowdancer                     <none>     (no description available)
pn  gdebi-core                    <none>     (no description available)
pn  pbuilder-uml                  <none>     (no description available)

-- debconf information:
  pbuilder/rewrite: false
* pbuilder/mirrorsite: http://mirror.internode.on.net/pub/debian
* pbuilder/nomirror: