postrm is in libnss-ldapd 0.9.9-1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | #!/bin/sh
set -e
# find the names of services that are configured to use LDAP
# Note: this function is in libnss-ldapd.config and libnss-ldapd.postrm
nss_list_configured()
{
sed -n \
's/^[[:space:]]*\([a-z]*\)[[:space:]]*:.*[[:space:]]ldap\([[:space:]].*\)\?/\1/p' \
/etc/nsswitch.conf \
| xargs
}
# check whether the name is configure to do lookups through
# LDAP
# Note: this function is in libnss-ldapd.postinst and libnss-ldapd.postrm
nss_is_enabled()
{
name="$1"
grep -q '^[[:space:]]*'$name'[[:space:]]*:.*ldap.*' /etc/nsswitch.conf
}
# remove NSS lookups though LDAP for the specified service
# Note: this function is in libnss-ldapd.postinst and libnss-ldapd.postrm
nss_disable()
{
name="$1"
# these functions also remove the lookup result handling part
# of the ldap entry (see nsswitch.conf(5))
if nss_is_enabled "$name"
then
echo "/etc/nsswitch.conf: disable LDAP lookups for $name" >&2
if [ -n "`sed -n '/^[[:space:]]*'$name'[[:space:]]*:[[:space:]]*ldap[[:space:]]*\(\[[^]]*\]\)*[[:space:]]*$/p' /etc/nsswitch.conf`" ]
then
# the name service only maps to ldap, remove the whole line
sed -i '/^[[:space:]]*'$name'[[:space:]]*:[[:space:]]*ldap[[:space:]]*\(\[[^]]*\]\)*[[:space:]]*$/d' /etc/nsswitch.conf
else
# remove ldap part from existing line, keeping other methods intact
# TODO: remove trailing space
sed -i 's/^\([[:space:]]*'$name'[[:space:]]*:.*\)ldap[[:space:]]*\(\[[^]]*\]\)*[[:space:]]*\(.*\)$/\1\3/' /etc/nsswitch.conf
fi
# invalidate nscd cache
nscd -i "$name" > /dev/null 2>&1 || true
fi
# we're done
return 0
}
# offer to remove ldap from nsswitch.conf unless an LDAP NSS module
# remains present (e.g. when switching between module implementation
# or architecture)
if ( [ "$1" = "remove" ] || [ "$1" = "purge" ] ) && ! [ -e /lib/*/libnss_ldap.so.2 ]
then
# check which naming services are configured
configured=`nss_list_configured`
if [ -n "$configured" ]
then
# if we have debconf, use debconf to ask, otherwise just shout
if [ -e /usr/share/debconf/confmodule ]
then
# ask with debconf
. /usr/share/debconf/confmodule
db_title "Removing libnss-ldapd"
db_subst libnss-ldapd/clean_nsswitch services "`echo $configured | sed 's/[[:space:]][[:space:]]*/, /g'`"
db_fset libnss-ldapd/clean_nsswitch seen false
if db_input high libnss-ldapd/clean_nsswitch
then
db_go
db_get libnss-ldapd/clean_nsswitch
if [ "$RET" = "true" ]
then
for n in $configured
do
nss_disable $n
done
fi
fi
# re-check which services are left enabled
configured=`nss_list_configured`
fi
# check if ldap is still configured
if [ -n "$configured" ]
then
echo "WARNING: LDAP is still configured in /etc/nsswitch.conf" >&2
fi
fi
fi
# Automatically added by dh_installdebconf/11.1.4ubuntu1
if [ "$1" = purge ] && [ -e /usr/share/debconf/confmodule ]; then
. /usr/share/debconf/confmodule
db_purge
fi
# End automatically added section
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