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