debian/dpkg.postinst

   1 #!/bin/sh
   2 # See deb-postinst(5).
   3
   4 set -e
   5
   6 PROGNAME=dpkg
   7
   8 . /usr/share/dpkg/sh/dpkg-error.sh
   9
  10 setup_colors
  11
  12 get_vendor()
  13 {
  14   local origin="$DPKG_ROOT/etc/dpkg/origins/default"
  15   local vendor
  16
  17   if [ -n "$DEB_VENDOR" ]; then
  18     vendor="$DEB_VENDOR"
  19   elif [ -e "$origin" ]; then
  20     vendor=$(sed -ne 's/^Vendor: *\([^ ]\+\) */\1/p' "$origin" | tr A-Z a-z)
  21   fi
  22
  23   echo "${vendor:-default}"
  24 }
  25
  26 check_merged_usr_via_aliased_dirs()
  27 {
  28   local vendor
  29
  30   vendor=$(get_vendor)
  31
  32   case "$vendor" in
  33   debian)
  34     # In Debian some people have gotten so offended by the following _warning_
  35     # that they have resorted to bullying and abuse. Life's too short, sorry.
  36     return
  37     ;;
  38   ubuntu)
  39     # Ubuntu does not seem interested in it.
  40     return
  41     ;;
  42   esac
  43
  44   for d in /bin /sbin /lib /lib32 /libo32 /libx32 /lib64; do
  45     linkname="$(readlink $DPKG_ROOT$d || true)"
  46     if [ "$linkname" = "usr$d" ] || [ "$linkname" = "/usr$d" ]; then
  47       warning "This system uses merged-usr-via-aliased-dirs, going behind dpkg's"
  48       warning "back, breaking its core assumptions. This can cause silent file"
  49       warning "overwrites and disappearances, and its general tools misbehavior."
  50       warning "See <https://wiki.debian.org/Teams/Dpkg/FAQ#broken-usrmerge>."
  51       break
  52     fi
  53   done
  54 }
  55
  56 setup_aliases()
  57 {
  58   local prog=start-stop-daemon
  59
  60   # Add a backward compatibility symlink alias for s-s-d, which is now
  61   # installed in its canonical location.
  62   if [ ! -f "$DPKG_ROOT/sbin/$prog" ]; then
  63     ln -s "/usr/sbin/$prog" "$DPKG_ROOT/sbin/$prog"
  64   fi
  65 }
  66
  67 case "$1" in
  68 configure)
  69   check_merged_usr_via_aliased_dirs
  70   setup_aliases
  71   ;;
  72 abort-upgrade|abort-deconfigure|abort-remove)
  73   ;;
  74 *)
  75   error "called with unknown argument '$1'"
  76   ;;
  77 esac
  78
  79 # Due to #932360 in debhelper we need to explicitly tell systemd to reload.
  80 case "$1" in
  81 configure|abort-upgrade|abort-deconfigure|abort-remove)
  82   if [ -d /run/systemd/system ]; then
  83     systemctl --system daemon-reload >/dev/null || true
  84   fi
  85   ;;
  86 esac
  87
  88 #DEBHELPER#
  89 exit 0