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 ; }

### Disable rogue hook scripts ###
# This should be kept in sync with the config script

db_get resolvconf/disable-bad-hooks
if [ "$RET" = "true" ] ; then
        PERMITTED_TO_DISABLE_BAD_HOOKS=yes
else
        PERMITTED_TO_DISABLE_BAD_HOOKS=""
fi

is_active()
{
        [ -s "$1" ] \
        && [ -x "$1" ] \
        && ! { \
            [ "$(cat "$1" | wc --chars)" -lt 11 ] \
            && [ "$(cat "$1")" = '#!/bin/sh' ] ; \
        } \
        && ! grep -q resolvconf "$1" > /dev/null
}

case "$1" in
configure|reconfigure)
        for F in /etc/ppp/ip-up.d/0dns-up \
                 /etc/ppp/ip-down.d/0dns-down \
                 /etc/ppp/ip-up.d/000usepeerdns \
                 /etc/ppp/ip-up.d/0xisp-dns \
                 /etc/ppp/ip-down.d/0xisp-dns
        do
                if is_active "$F" ; then
                        if [ "$PERMITTED_TO_DISABLE_BAD_HOOKS" = yes ] ; then
                                chmod ugo-x "$F"
                        else
                                report "Script $F must be disabled or deleted."
                                report "It is recommended that you do: chmod ugo-x $F"
                        fi
                fi
        done
        ;;
# *)
        # In other modes we don't need to do anything
        # because we didn't take any action in the prerm
esac

### 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 "$RUN_CANONICALPATH" ] ; then
                        report_err "Deleting /etc/resolvconf/run symlink whose canonical path could not be determined"
                        rm -f /etc/resolvconf/run
                fi
        fi
        # Delete it if it isn't a directory or a link to one
        if [ -e /etc/resolvconf/run ] && [ ! -d /etc/resolvconf/run ] ; then
                report_err "Deleting /etc/resolvconf/run which isn't a directory"
                rm -f /etc/resolvconf/run
        fi
        # Now /etc/resolvconf/run is either
        # * a directory, or
        # * a symlink to a directory, or
        # * a nonexistent (if you'll pardon the expression), or
        # * a dangling but canonicalizable symlink
        if [ -d /etc/resolvconf/run ] ; then
                # It's a directory or a symlink to one
                [ -d /etc/resolvconf/run/interface ] || mkdir -v /etc/resolvconf/run/interface
        elif [ -L /etc/resolvconf/run ] ; then
                # It's a dangling but canonicalizable symlink
                mkdir -v "$RUN_CANONICALPATH"
                mkdir -v "${RUN_CANONICALPATH}/interface"
        else
                # It's a nonexistent
                # Use /dev/shm if possible
                if \
                        [ -d /dev/shm ] \
                        && [ -w /dev/shm ] \
                        && [ -r /proc/mounts ] \
                        && grep -qs "^tmpfs[[:space:]]\+/dev/shm[[:space:]]\+tmpfs[[:space:]]\+\([^[:space:]]\+,\)\?rw" /proc/mounts \
                        && ! grep -qs '[[:space:]]/dev[[:space:]]devfs[[:space:]]' /proc/mounts \
                        && { [ -d /dev/shm/resolvconf ] || mkdir -v /dev/shm/resolvconf ; } \
                        && { [ -d /dev/shm/resolvconf/interface ] || mkdir -v /dev/shm/resolvconf/interface ; }
                then
                        ln -s /dev/shm/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

### Enable updates ###
/etc/init.d/resolvconf enable-updates

db_stop

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: $*" >&2 ; }
11
12			### Disable rogue hook scripts ###
13			# This should be kept in sync with the config script
14
15			db_get resolvconf/disable-bad-hooks
16			if [ "$RET" = "true" ] ; then
17			PERMITTED_TO_DISABLE_BAD_HOOKS=yes
18			else
19			PERMITTED_TO_DISABLE_BAD_HOOKS=""
20			fi
21
22			is_active()
23			{
24			[ -s "$1" ] \
25			&& [ -x "$1" ] \
26			&& ! { \
27			[ "$(cat "$1" \| wc --chars)" -lt 11 ] \
28			&& [ "$(cat "$1")" = '#!/bin/sh' ] ; \
29			} \
30			&& ! grep -q resolvconf "$1" > /dev/null
31			}
32
33			case "$1" in
34			configure\|reconfigure)
35			for F in /etc/ppp/ip-up.d/0dns-up \
36			/etc/ppp/ip-down.d/0dns-down \
37			/etc/ppp/ip-up.d/000usepeerdns \
38			/etc/ppp/ip-up.d/0xisp-dns \
39			/etc/ppp/ip-down.d/0xisp-dns
40			do
41			if is_active "$F" ; then
42			if [ "$PERMITTED_TO_DISABLE_BAD_HOOKS" = yes ] ; then
43			chmod ugo-x "$F"
44			else
45			report "Script $F must be disabled or deleted."
46			report "It is recommended that you do: chmod ugo-x $F"
47			fi
48			fi
49			done
50			;;
51			# *)
52			# In other modes we don't need to do anything
53			# because we didn't take any action in the prerm
54			esac
55
56			### Create /etc/resolvconf/run ###
57			case "$1" in
58			configure\|reconfigure)
59			# Unfortunately we can't keep state files in /var/run/ because
60			# resolvconf, as it must, initializes before networking does and
61			# /var/ can be on the network.
62			#
63			# Only use an existing symlink if it is canonicalizable
64			if [ -L /etc/resolvconf/run ] ; then
65			RUN_CANONICALPATH="$(readlink -f /etc/resolvconf/run \|\| :)"
66			if [ -z "$RUN_CANONICALPATH" ] ; then
67			report_err "Deleting /etc/resolvconf/run symlink whose canonical path could not be determined"
68			rm -f /etc/resolvconf/run
69			fi
70			fi
71			# Delete it if it isn't a directory or a link to one
72			if [ -e /etc/resolvconf/run ] && [ ! -d /etc/resolvconf/run ] ; then
73			report_err "Deleting /etc/resolvconf/run which isn't a directory"
74			rm -f /etc/resolvconf/run
75			fi
76			# Now /etc/resolvconf/run is either
77			# * a directory, or
78			# * a symlink to a directory, or
79			# * a nonexistent (if you'll pardon the expression), or
80			# * a dangling but canonicalizable symlink
81			if [ -d /etc/resolvconf/run ] ; then
82			# It's a directory or a symlink to one
83			[ -d /etc/resolvconf/run/interface ] \|\| mkdir -v /etc/resolvconf/run/interface
84			elif [ -L /etc/resolvconf/run ] ; then
85			# It's a dangling but canonicalizable symlink
86			mkdir -v "$RUN_CANONICALPATH"
87			mkdir -v "${RUN_CANONICALPATH}/interface"
88			else
89			# It's a nonexistent
90			# Use /dev/shm if possible
91			if \
92			[ -d /dev/shm ] \
93			&& [ -w /dev/shm ] \
94			&& [ -r /proc/mounts ] \
95			&& grep -qs "^tmpfs[[:space:]]\+/dev/shm[[:space:]]\+tmpfs[[:space:]]\+\([^[:space:]]\+,\)\?rw" /proc/mounts \
96			&& ! grep -qs '[[:space:]]/dev[[:space:]]devfs[[:space:]]' /proc/mounts \
97			&& { [ -d /dev/shm/resolvconf ] \|\| mkdir -v /dev/shm/resolvconf ; } \
98			&& { [ -d /dev/shm/resolvconf/interface ] \|\| mkdir -v /dev/shm/resolvconf/interface ; }
99			then
100			ln -s /dev/shm/resolvconf /etc/resolvconf/run
101			else
102			mkdir -v /etc/resolvconf/run
103			mkdir -v /etc/resolvconf/run/interface
104			fi
105			fi
106			;;
107			# *)
108			# In other modes we don't need to do anything
109			# because we didn't take any action in the prerm
110			esac
111
112
113			case "$1" in
114			configure\|reconfigure)
115			# Deleting the old runlevel config is unavoidable
116			# because there is currently no way in Debian
117			# to update the config iff it is still the factory default
118			update-rc.d -f resolvconf remove > /dev/null 2>&1
119			;;
120			esac
121
122			# We use dh_installinit with --no-start
123			#DEBHELPER#
124
125			### Link tail to original if appropriate ###
126			TIME_TO_CHANGE_TAIL_LINK=no
127			case "$1" in
128			configure\|reconfigure)
129			TIME_TO_CHANGE_TAIL_LINK=yes
130			;;
131			# *)
132			# In other modes we don't need to do anything
133			# because we didn't take any action in the prerm
134			esac
135
136			if [ "$TIME_TO_CHANGE_TAIL_LINK" = yes ] ; then
137			if [ ! -e /etc/resolvconf/resolv.conf.d/tail ] ; then
138			db_get resolvconf/link-tail-to-original
139			if [ "$RET" = "true" ] ; then
140			ln -nsf original /etc/resolvconf/resolv.conf.d/tail
141			else
142			: > /etc/resolvconf/resolv.conf.d/tail
143			fi
144			fi
145			fi
146
147			### Linkify /etc/resolv.conf if appropriate ###
148			TIME_TO_CHANGE_LINKIFICATION=no
149			case "$1" in
150			configure\|reconfigure)
151			TIME_TO_CHANGE_LINKIFICATION=yes
152			;;
153			# *)
154			# In other modes we don't need to do anything
155			# because we didn't take any action in the prerm
156			esac
157
158			if [ "$TIME_TO_CHANGE_LINKIFICATION" = yes ] ; then
159			db_get resolvconf/linkify-resolvconf
160			if [ "$RET" = "true" ] ; then
161			# Back up
162			if \
163			[ -f /etc/resolv.conf ] \
164			&& { \
165			[ ! -L /etc/resolv.conf ] \
166			\|\| [ ! "$(readlink /etc/resolv.conf)" = "/etc/resolvconf/run/resolv.conf" ] ; \
167			}
168			then
169			if [ ! -e /etc/resolvconf/resolv.conf.d/original ] ; then
170			cp -a /etc/resolv.conf /etc/resolvconf/resolv.conf.d/original
171			else
172			cp -a /etc/resolv.conf /etc/resolv.conf.dpkg-old
173			fi
174			# Before creating the link, make sure that the original file is
175			# at the target of the link. /sbin/resolvconf will overwrite
176			# this when it runs, of course.
177			if [ ! -e /etc/resolvconf/run/resolv.conf ] ; then
178			cp -a /etc/resolv.conf /etc/resolvconf/run/resolv.conf
179			fi
180			fi
181
182			# Create the link
183			ln -nsf /etc/resolvconf/run/resolv.conf /etc/resolv.conf
184
185			fi
186			fi
187
188			### Enable updates ###
189			/etc/init.d/resolvconf enable-updates
190
191			db_stop
192