Contents of /resolvconf/trunk/debian/postinst

#!/bin/bash
# Bash required because /usr/share/debconf/confmodule uses "local" (#252094)

set -e

. /usr/share/debconf/confmodule

MYNAME=resolvconf.postinst
report() { echo "${MYNAME}: $*" ; }
report_err() { report "Error: $*" >&2 ; }
report_info() { report "Info: $*" >&2 ; }

### Create /etc/resolvconf/run ###
case "$1" in
configure|reconfigure)
        # Unfortunately we can't keep state files in /var/run/ because 
        # resolvconf, as it must, initializes before networking does and
        # /var/ can be on the network.
        #
        # Only use an existing symlink if it is canonicalizable
        if [ -L /etc/resolvconf/run ] ; then
                RUN_CANONICALPATH="$(readlink -f /etc/resolvconf/run || :)"
                if [ -z "$RUN_CANONICALPATH" ] ; then
                        report_err "Deleting /etc/resolvconf/run symlink whose canonical path could not be determined"
                        rm -f /etc/resolvconf/run
                elif \
                        [ "$RUN_CANONICALPATH" = "/dev/shm/resolvconf" ] \
                        && [ -d /lib/init/rw ] \
                        && [ -w /lib/init/rw ] \
                        && [ -r /proc/mounts ] \
                        && grep -qs "^tmpfs[[:space:]]\+/lib/init/rw[[:space:]]\+tmpfs[[:space:]]\+\([^[:space:]]\+,\)\?rw" /proc/mounts \
                        && { [ -d /lib/init/rw/resolvconf ] || mkdir -v /lib/init/rw/resolvconf ; } \
                        && { [ -d /lib/init/rw/resolvconf/interface ] || mkdir -v /lib/init/rw/resolvconf/interface ; }
                then
                        report_info "Migrating /dev/shm/resolvconf to /lib/init/rw/resolvconf"
                        F="$(echo /dev/shm/resolvconf/*)"
                        [ "$F" ] && [ "$F" != '/dev/shm/resolvconf/*' ] && cp -a /dev/shm/resolvconf/* /lib/init/rw/resolvconf
                        ln -nsf /lib/init/rw/resolvconf /etc/resolvconf/run
                fi
        fi
        # Delete it if it isn't a directory or a link to one
        if [ -e /etc/resolvconf/run ] && [ ! -d /etc/resolvconf/run ] ; then
                report_err "Deleting /etc/resolvconf/run which isn't a directory"
                rm -f /etc/resolvconf/run
        fi
        # Now /etc/resolvconf/run is either
        # * a directory, or
        # * a symlink to a directory, or
        # * a nonexistent (if you'll pardon the expression), or
        # * a dangling but canonicalizable symlink
        if [ -d /etc/resolvconf/run ] ; then
                # It's a directory or a symlink to one
                [ -d /etc/resolvconf/run/interface ] || mkdir -v /etc/resolvconf/run/interface
        elif [ -L /etc/resolvconf/run ] ; then
                # It's a dangling but canonicalizable symlink
                mkdir -v "$RUN_CANONICALPATH"
                mkdir -v "${RUN_CANONICALPATH}/interface"
        else
                # It's a nonexistent
                # Use /lib/init/rw if possible
                if \
                        [ -d /lib/init/rw ] \
                        && [ -w /lib/init/rw ] \
                        && [ -r /proc/mounts ] \
                        && grep -qs "^tmpfs[[:space:]]\+/lib/init/rw[[:space:]]\+tmpfs[[:space:]]\+\([^[:space:]]\+,\)\?rw" /proc/mounts \
                        && { [ -d /lib/init/rw/resolvconf ] || mkdir -v /lib/init/rw/resolvconf ; } \
                        && { [ -d /lib/init/rw/resolvconf/interface ] || mkdir -v /lib/init/rw/resolvconf/interface ; }
                then
                        ln -s /lib/init/rw/resolvconf /etc/resolvconf/run
                else
                        mkdir -v /etc/resolvconf/run
                        mkdir -v /etc/resolvconf/run/interface
                fi
        fi
        ;;
# *)
        # In other modes we don't need to do anything
        # because we didn't take any action in the prerm
esac


case "$1" in
configure|reconfigure)
        # Deleting the old runlevel config is unavoidable
        # because there is currently no way in Debian
        # to update the config iff it is still the factory default
        update-rc.d -f resolvconf remove > /dev/null 2>&1
        ;;
esac

# We use dh_installinit with --no-start
#DEBHELPER#

### Link tail to original if appropriate ###
TIME_TO_CHANGE_TAIL_LINK=no
case "$1" in
configure|reconfigure)
        TIME_TO_CHANGE_TAIL_LINK=yes
        ;;
# *)
        # In other modes we don't need to do anything
        # because we didn't take any action in the prerm
esac

if [ "$TIME_TO_CHANGE_TAIL_LINK" = yes ] ; then
        if [ ! -e /etc/resolvconf/resolv.conf.d/tail ] ; then
                db_get resolvconf/link-tail-to-original
                if [ "$RET" = "true" ] ; then
                        ln -nsf original /etc/resolvconf/resolv.conf.d/tail
                else
                        : > /etc/resolvconf/resolv.conf.d/tail
                fi
        fi
fi

### Linkify /etc/resolv.conf if appropriate ###
TIME_TO_CHANGE_LINKIFICATION=no
case "$1" in
configure|reconfigure)
        TIME_TO_CHANGE_LINKIFICATION=yes
        ;;
# *)
        # In other modes we don't need to do anything
        # because we didn't take any action in the prerm
esac

if [ "$TIME_TO_CHANGE_LINKIFICATION" = yes ] ; then
        db_get resolvconf/linkify-resolvconf
        if [ "$RET" = "true" ] ; then
                # Back up
                if \
                        [ -f /etc/resolv.conf ] \
                        && { \
                                [ ! -L /etc/resolv.conf ] \
                                || [ ! "$(readlink /etc/resolv.conf)" = "/etc/resolvconf/run/resolv.conf" ] ; \
                        }
                then
                        if [ ! -e /etc/resolvconf/resolv.conf.d/original ] ; then
                                cp -a /etc/resolv.conf /etc/resolvconf/resolv.conf.d/original
                        else
                                cp -a /etc/resolv.conf /etc/resolv.conf.dpkg-old
                        fi
                        # Before creating the link, make sure that the original file is
                        # at the target of the link.  /sbin/resolvconf will overwrite
                        # this when it runs, of course.
                        if [ ! -e /etc/resolvconf/run/resolv.conf ] ; then
                                cp -a /etc/resolv.conf /etc/resolvconf/run/resolv.conf
                        fi
                fi

                # Create the link
                ln -nsf /etc/resolvconf/run/resolv.conf /etc/resolv.conf

        fi
fi
                                                                
db_stop

### Enable updates ###
if [ -x "/etc/init.d/resolvconf" ] ; then
        if which invoke-rc.d >/dev/null 2>&1 ; then
                invoke-rc.d resolvconf enable-updates || :
        else
                /etc/init.d/resolvconf enable-updates
        fi
fi
1	jdthood-guest	3	#!/bin/bash
2			# Bash required because /usr/share/debconf/confmodule uses "local" (#252094)
3
4			set -e
5
6			. /usr/share/debconf/confmodule
7
8			MYNAME=resolvconf.postinst
9			report() { echo "${MYNAME}: $*" ; }
10			report_err() { report "Error: $*" >&2 ; }
11	rekt-guest	58	report_info() { report "Info: $*" >&2 ; }
12	jdthood-guest	3
13			### Create /etc/resolvconf/run ###
14			case "$1" in
15			configure\|reconfigure)
16			# Unfortunately we can't keep state files in /var/run/ because
17			# resolvconf, as it must, initializes before networking does and
18			# /var/ can be on the network.
19			#
20			# Only use an existing symlink if it is canonicalizable
21			if [ -L /etc/resolvconf/run ] ; then
22			RUN_CANONICALPATH="$(readlink -f /etc/resolvconf/run \|\| :)"
23			if [ -z "$RUN_CANONICALPATH" ] ; then
24			report_err "Deleting /etc/resolvconf/run symlink whose canonical path could not be determined"
25			rm -f /etc/resolvconf/run
26	jdthood-guest	59	elif \
27			[ "$RUN_CANONICALPATH" = "/dev/shm/resolvconf" ] \
28			&& [ -d /lib/init/rw ] \
29	rekt-guest	58	&& [ -w /lib/init/rw ] \
30			&& [ -r /proc/mounts ] \
31			&& grep -qs "^tmpfs[[:space:]]\+/lib/init/rw[[:space:]]\+tmpfs[[:space:]]\+\([^[:space:]]\+,\)\?rw" /proc/mounts \
32			&& { [ -d /lib/init/rw/resolvconf ] \|\| mkdir -v /lib/init/rw/resolvconf ; } \
33			&& { [ -d /lib/init/rw/resolvconf/interface ] \|\| mkdir -v /lib/init/rw/resolvconf/interface ; }
34	jdthood-guest	59	then
35	rekt-guest	58	report_info "Migrating /dev/shm/resolvconf to /lib/init/rw/resolvconf"
36	jdthood-guest	73	F="$(echo /dev/shm/resolvconf/*)"
37			[ "$F" ] && [ "$F" != '/dev/shm/resolvconf/' ] && cp -a /dev/shm/resolvconf/ /lib/init/rw/resolvconf
38	jdthood-guest	86	ln -nsf /lib/init/rw/resolvconf /etc/resolvconf/run
39	jdthood-guest	3	fi
40			fi
41			# Delete it if it isn't a directory or a link to one
42			if [ -e /etc/resolvconf/run ] && [ ! -d /etc/resolvconf/run ] ; then
43			report_err "Deleting /etc/resolvconf/run which isn't a directory"
44			rm -f /etc/resolvconf/run
45			fi
46			# Now /etc/resolvconf/run is either
47			# * a directory, or
48			# * a symlink to a directory, or
49			# * a nonexistent (if you'll pardon the expression), or
50			# * a dangling but canonicalizable symlink
51			if [ -d /etc/resolvconf/run ] ; then
52			# It's a directory or a symlink to one
53			[ -d /etc/resolvconf/run/interface ] \|\| mkdir -v /etc/resolvconf/run/interface
54			elif [ -L /etc/resolvconf/run ] ; then
55			# It's a dangling but canonicalizable symlink
56			mkdir -v "$RUN_CANONICALPATH"
57			mkdir -v "${RUN_CANONICALPATH}/interface"
58			else
59			# It's a nonexistent
60	rekt-guest	58	# Use /lib/init/rw if possible
61	jdthood-guest	3	if \
62	rekt-guest	58	[ -d /lib/init/rw ] \
63			&& [ -w /lib/init/rw ] \
64	jdthood-guest	3	&& [ -r /proc/mounts ] \
65	rekt-guest	58	&& grep -qs "^tmpfs[[:space:]]\+/lib/init/rw[[:space:]]\+tmpfs[[:space:]]\+\([^[:space:]]\+,\)\?rw" /proc/mounts \
66			&& { [ -d /lib/init/rw/resolvconf ] \|\| mkdir -v /lib/init/rw/resolvconf ; } \
67			&& { [ -d /lib/init/rw/resolvconf/interface ] \|\| mkdir -v /lib/init/rw/resolvconf/interface ; }
68	jdthood-guest	3	then
69	rekt-guest	58	ln -s /lib/init/rw/resolvconf /etc/resolvconf/run
70	jdthood-guest	3	else
71			mkdir -v /etc/resolvconf/run
72			mkdir -v /etc/resolvconf/run/interface
73			fi
74			fi
75			;;
76			# *)
77			# In other modes we don't need to do anything
78			# because we didn't take any action in the prerm
79			esac
80
81
82			case "$1" in
83			configure\|reconfigure)
84			# Deleting the old runlevel config is unavoidable
85			# because there is currently no way in Debian
86			# to update the config iff it is still the factory default
87			update-rc.d -f resolvconf remove > /dev/null 2>&1
88			;;
89			esac
90
91			# We use dh_installinit with --no-start
92			#DEBHELPER#
93
94			### Link tail to original if appropriate ###
95			TIME_TO_CHANGE_TAIL_LINK=no
96			case "$1" in
97			configure\|reconfigure)
98			TIME_TO_CHANGE_TAIL_LINK=yes
99			;;
100			# *)
101			# In other modes we don't need to do anything
102			# because we didn't take any action in the prerm
103			esac
104
105			if [ "$TIME_TO_CHANGE_TAIL_LINK" = yes ] ; then
106			if [ ! -e /etc/resolvconf/resolv.conf.d/tail ] ; then
107			db_get resolvconf/link-tail-to-original
108			if [ "$RET" = "true" ] ; then
109			ln -nsf original /etc/resolvconf/resolv.conf.d/tail
110			else
111			: > /etc/resolvconf/resolv.conf.d/tail
112			fi
113			fi
114			fi
115
116			### Linkify /etc/resolv.conf if appropriate ###
117			TIME_TO_CHANGE_LINKIFICATION=no
118			case "$1" in
119			configure\|reconfigure)
120			TIME_TO_CHANGE_LINKIFICATION=yes
121			;;
122			# *)
123			# In other modes we don't need to do anything
124			# because we didn't take any action in the prerm
125			esac
126
127			if [ "$TIME_TO_CHANGE_LINKIFICATION" = yes ] ; then
128			db_get resolvconf/linkify-resolvconf
129			if [ "$RET" = "true" ] ; then
130			# Back up
131			if \
132			[ -f /etc/resolv.conf ] \
133			&& { \
134			[ ! -L /etc/resolv.conf ] \
135			\|\| [ ! "$(readlink /etc/resolv.conf)" = "/etc/resolvconf/run/resolv.conf" ] ; \
136			}
137			then
138			if [ ! -e /etc/resolvconf/resolv.conf.d/original ] ; then
139			cp -a /etc/resolv.conf /etc/resolvconf/resolv.conf.d/original
140			else
141			cp -a /etc/resolv.conf /etc/resolv.conf.dpkg-old
142			fi
143			# Before creating the link, make sure that the original file is
144			# at the target of the link. /sbin/resolvconf will overwrite
145			# this when it runs, of course.
146			if [ ! -e /etc/resolvconf/run/resolv.conf ] ; then
147			cp -a /etc/resolv.conf /etc/resolvconf/run/resolv.conf
148			fi
149			fi
150
151			# Create the link
152			ln -nsf /etc/resolvconf/run/resolv.conf /etc/resolv.conf
153
154			fi
155			fi
156	jdthood-guest	39
157			db_stop
158	jdthood-guest	3
159			### Enable updates ###
160	jdthood-guest	39	if [ -x "/etc/init.d/resolvconf" ] ; then
161			if which invoke-rc.d >/dev/null 2>&1 ; then
162			invoke-rc.d resolvconf enable-updates \|\| :
163			else
164			/etc/init.d/resolvconf enable-updates
165			fi
166			fi