From: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Date: Mon, 13 Feb 2012 12:10:42 +0000 (+0100)
Subject: Kernel and init script cleanup.
X-Git-Tag: debian/6.0.3~1
X-Git-Url: http://ftp.carnet.hr/carnet-debian/scm?a=commitdiff_plain;h=a15294f52fc01f32e55378ef8f3ef8973700e743;p=carnet-upgrade.git

Kernel and init script cleanup.
---

diff --git a/src/actions/main.queue b/src/actions/main.queue
index b4bd0e3..313bcf0 100644
--- a/src/actions/main.queue
+++ b/src/actions/main.queue
@@ -46,7 +46,9 @@ true				remove_orphaned		# ocisti stare libove nakon sto su cn paketi nadogradje
 # i ostatak
 true				add_group_proc		# za oidentd
 true				enable_monit
+true				clean_old_kernels
 pkg kernel-2.6-cn		dpkg-reconfigure kernel-2.6-cn
+true				clean_initd_packages
 true				dpkg-reconfigure sysv-rc
 # ovo bi trebalo biti predzadnje na popisu
 #  - izvrsi sve uvjetne post_upgrade akcije
diff --git a/src/functions.sh b/src/functions.sh
index 6beb99b..0fee7ca 100644
--- a/src/functions.sh
+++ b/src/functions.sh
@@ -1062,16 +1062,29 @@ check_archives_space() {
   fi
 }
 
-check_kernel_space() {
-  local available_disk_space kernel_size linux_images metapkg pkg ret
-  available_disk_space=$(free_space /)
+# calculate the list of linux-image packages from kernel-2.6-cn dependencies
+get_cn_kernels() {
+  local cn_kernels linux_images metapkg pkg
+
+  cn_kernels=
   linux_images=$(apt-cache show kernel-2.6-cn | grep ^Depends: \
     | grep -o 'linux-image[^, ]*')
   for metapkg in $linux_images; do
     pkg=$(apt-cache show $metapkg | grep ^Depends: \
           | grep -o 'linux-image[^, ]*' | head -1)
-    [ "$pkg" ] || continue
+    [ "$pkg" ] && cn_kernels="$cn_kernels $pkg"
+  done
+
+  echo $cn_kernels
+}
 
+# check if there is enough space on / for the new kernel package
+check_kernel_space() {
+  local available_disk_space kernel_size linux_images pkg ret
+  available_disk_space=$(free_space /)
+
+  linux_images=$( get_cn_kernels )
+  for pkg in $linux_images; do
     kernel_size=$(installed_size $pkg)
     ret=$?
     [ $ret -eq 0 ] && break
@@ -1100,6 +1113,82 @@ check_kernel_space() {
   fi
 }
 
+# free some space on / partition by cleaning old unused kernels
+clean_old_kernels() {
+  local installed keep pkg keep remove delete name dialog_list selection
+
+  # find all installed kernels
+  installed=$(
+    dpkg -l | egrep '^ii  linux-image-[0-9]+[.][0-9]+[.][0-9]+-' \
+    | awk '{print $2}'
+  )
+  log "Found kernel packages: $installed"
+
+  # leave current and new kernels
+  keep="linux-image-$(uname -r) $(get_cn_kernels)"
+  log "Keep kernel packages: $keep"
+
+  # check what to remove
+  remove=
+  for pkg in $installed; do
+    delete=yes
+    for name in $keep; do
+      [ "$pkg" = "$name" ] && delete=
+    done
+    if [ "$delete" = yes ]; then
+      remove="$remove $pkg"
+    fi
+  done
+  log "Obsolete kernel packages: $remove"
+
+  if [ "$remove" ]; then
+    for pkg in $remove; do
+      dialog_list="$dialog_list $pkg '' off"
+    done
+
+    # user selects the packages to delete
+    selection=$( mktemp /var/lib/carnet-upgrade/selection.XXXXXX )
+    eval LC_MESSAGES=hr_HR dialog --nocancel --backtitle \""$title"\" \
+      --checklist \""$msg_remove_kernels"\" 20 75 6 $dialog_list 2>$selection
+
+    selected=$( tr -d \" < $selection )
+    rm -f $selection
+
+    if [ "$selected" ]; then
+      log "Removing kernel packages: $selected"
+      pkgrm $selected
+    fi
+  fi
+}
+
+# prevent sysv-rc migration problems
+clean_initd_packages() {
+  local list removed pkg dialog_list selection selected
+
+  list=$( dpkg -S /etc/init.d/\* | grep -v ^diversion | cut -d: -f1 | sort -u )
+  removed=$( dpkg -l $list | sed -n 's/^r.[[:space:]]\+\([^[:space:]]\+\).*/\1/p' )
+  log "Found removed packages: $removed"
+
+  if [ "$removed" ]; then
+    for pkg in $removed; do
+      dialog_list="$dialog_list $pkg '' off"
+    done
+
+    # user selects the packages to delete
+    selection=$( mktemp /var/lib/carnet-upgrade/selection.XXXXXX )
+    eval LC_MESSAGES=hr_HR dialog --nocancel --backtitle \""$title"\" \
+      --checklist \""$msg_remove_initd"\" 20 75 6 $dialog_list 2>$selection
+
+    selected=$( tr -d \" < $selection )
+    rm -f $selection
+
+    if [ "$selected" ]; then
+      log "Purging packages: $selected"
+      dpkg -P $selected
+    fi
+  fi
+}
+
 free_space() {
   df --portability --block-size=1M "$1" | tail -1 | awk '{print $4}'
 }
diff --git a/src/messages.sh b/src/messages.sh
index 8e4bc8c..23ea728 100644
--- a/src/messages.sh
+++ b/src/messages.sh
@@ -45,6 +45,27 @@ neki od navedenih servisa ukljucite oznaku ispred imena odgovarajuceg paketa.
 Odaberite servise koje zelite UKLONITI:
 "
 
+msg_remove_kernels="Da bi se izbjeglo zapunjenje / particije preporuca se brisanje starih \
+kernela. U ovom koraku nudi se mogucnost uklanjanja nekoristenih \
+kernel paketa sa vaseg posluzitelja. Ukoliko zelite ukloniti neki od \
+trenutno instaliranih kernela ukljucite oznaku ispred imena odgovarajuceg \
+paketa.
+
+Odaberite pakete koje zelite UKLONITI:
+"
+
+msg_remove_initd="Nova inacica Debiana donosi mogucnost paralelnog pokretanja servisa \
+kod pokretanja posluzitelja.  Da bi se proveo prijelaz na sustav paralelnog \
+pokretanja potrebno je obrisati nekoristene init skripte. Obicno \
+se radi o skriptama koje su ostale nakon nepotpunog brisanja paketa. \
+U ovom koraku nudi se mogucnost brisanja konfiguracija i init skripti \
+paketa koji su djelomicno obrisani.  Ukoliko zelite ukloniti datoteke \
+preostale nakon brisanja paketa ukljucite oznaku ispred imena odgovarajuceg \
+paketa.
+
+Odaberite pakete cije konfiguracije i init skripte zelite UKLONITI:
+"
+
 msg_comment_force_overwrite="U vasem /etc/dpkg/dpkg.cfg je pronadjena opcija\
  force-overwrite koja nije preporucljiva za uobicajen rad. Ukoliko\
  zelite, odkomentirajte je nakon zavrsetka rada skripte."