xref: /freebsd-10.1-release/usr.sbin/bsdconfig/usermgmt/share/group.subr

if [ ! "$_USERMGMT_GROUP_SUBR" ]; then _USERMGMT_GROUP_SUBR=1
#
# Copyright (c) 2012 Ron McDowell
# Copyright (c) 2012-2014 Devin Teske
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
############################################################ INCLUDES

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading includes..." usermgmt/group.subr
f_include $BSDCFG_SHARE/dialog.subr
f_include $BSDCFG_SHARE/usermgmt/group_input.subr

BSDCFG_LIBE="/usr/libexec/bsdconfig" APP_DIR="070.usermgmt"
f_include_lang $BSDCFG_LIBE/$APP_DIR/include/messages.subr

############################################################ CONFIGURATION

# set some reasonable defaults if /etc/adduser.conf does not exist.
[ -f /etc/adduser.conf ] && f_include /etc/adduser.conf
: ${passwdtype:="yes"}

############################################################ FUNCTIONS

# f_group_add [$group]
#
# Add a group. If both $group (as a first argument) and $VAR_GROUP are unset
# or NULL and we are running interactively, prompt the user to enter the name
# of a new group and (if $VAR_NO_CONFIRM is unset or NULL) prompt the user to
# answer some questions about the new group. Variables that can be used to
# script user input:
#
# 	VAR_GROUP [Optional if running interactively]
# 		The group to add. Ignored if given non-NULL first-argument.
#	VAR_GROUP_GID [Optional]
# 		Numerical group ID to use. If NULL or unset, the group ID is
# 		automatically chosen.
# 	VAR_GROUP_MEMBERS [Optional]
# 		Comma separated list of users that are a member of this group.
# 	VAR_GROUP_PASSWORD [Optional]
# 		newgrp(1) password to set for the group. Default if NULL or
# 		unset is to disable newgrp(1) password authentication.
#
# Returns success if the group was successfully added.
#
f_group_add()
{
	local funcname=f_group_add
	local title # Calculated below
	local alert=f_show_msg no_confirm=

	f_getvar $VAR_NO_CONFIRM no_confirm
	[ "$no_confirm" ] && alert=f_show_info

	local input
	f_getvar 3:-\$$VAR_GROUP input "$1"

	#
	# NB: pw(8) has a ``feature'' wherein `-n name' can be taken as GID
	# instead of name. Work-around is to also pass `-g GID' at the same
	# time (any GID will do; but `-1' is appropriate for this context).
	#
	if [ "$input" ] && f_quietly pw groupshow -n "$input" -g -1; then
		f_show_err "$msg_group_already_used" "$input"
		return $FAILURE
	fi

	local group_name="$input"
	while f_interactive && [ ! "$group_name" ]; do
		f_dialog_input_group_name group_name "$group_name" ||
			return $SUCCESS
		[ "$group_name" ] ||
			f_show_err "$msg_please_enter_a_group_name"
	done
	if [ ! "$group_name" ]; then
		f_show_err "$msg_no_group_specified"
		return $FAILURE
	fi

	local group_password group_gid group_members
	f_getvar $VAR_GROUP_PASSWORD	group_password
	f_getvar $VAR_GROUP_GID		group_gid
	f_getvar $VAR_GROUP_MEMBERS	group_members

	local group_password_disable=
	f_interactive || [ "$group_password" ] || group_password_disable=1

	if f_interactive && [ ! "$no_confirm" ]; then
		f_dialog_noyes \
			"$msg_use_default_values_for_all_account_details"
		retval=$?
		if [ $retval -eq $DIALOG_ESC ]; then
			return $SUCCESS
		elif [ $retval -ne $DIALOG_OK ]; then
			#
			# Ask series of questions to pre-fill the editor screen
			#
			# Defaults used in each dialog should allow the user to
			# simply hit ENTER to proceed and cancelling a single
			# dialog cause them to return to the previous menu.
			#
	
			if [ "$passwdtype" = "yes" ]; then
				f_dialog_input_group_password group_password \
					group_password_disable ||
					return $FAILURE
			fi
			f_dialog_input_group_gid group_gid "$group_gid" ||
				return $FAILURE
			f_dialog_input_group_members group_members \
				"$group_members" || return $FAILURE
		fi
	fi

	#
	# Loop until the user decides to Exit, Cancel, or presses ESC
	#
	title="$msg_add $msg_group: $group_name"
	if f_interactive; then
		local mtag retval defaultitem=
		while :; do
			f_dialog_title "$title"
			f_dialog_menu_group_add "$defaultitem"
			retval=$?
			f_dialog_title_restore
			f_dialog_menutag_fetch mtag
			f_dprintf "retval=%u mtag=[%s]" $retval "$mtag"
			defaultitem="$mtag"

			# Return if user either pressed ESC or chose Cancel/No
			[ $retval -eq $DIALOG_OK ] || return $FAILURE

			case "$mtag" in
			X) # Add/Exit
			   local var
			   for var in gid members name; do
			   	local _group_$var
			   	eval f_shell_escape \
			   		\"\$group_$var\" _group_$var
			   done

			   local cmd="pw groupadd -n '$_group_name'"
			   [ "$group_gid" ] && cmd="$cmd -g '$_group_gid'"
			   [ "$group_members" ] &&
			   	cmd="$cmd -M '$_group_members'"

			   # Execute the command (break on success)
			   if [ "$group_password_disable" ]; then
			   	f_eval_catch $funcname pw '%s -h -' "$cmd"
			   elif [ "$group_password" ]; then
			   	echo "$group_password" |
			   		f_eval_catch $funcname \
			   			pw '%s -h 0' "$cmd"
			   else
			   	f_eval_catch $funcname pw '%s' "$cmd"
			   fi && break
			   ;;
			1) # Group Name (prompt for new group name)
			   f_dialog_input_group_name input "$group_name" ||
			   	continue
			   if f_quietly pw groupshow -n "$input" -g -1; then
			   	f_show_err "$msg_group_already_used" "$input"
			   	continue
			   fi
			   group_name="$input"
			   title="$msg_add $msg_group: $group_name"
			   ;;
			2) # Password
			   f_dialog_input_group_password group_password \
			   	group_password_disable
			   ;;
			3) # Group ID
			   f_dialog_input_group_gid group_gid "$group_gid"
			   ;;
			4) # Group Members
			   f_dialog_input_group_members group_members \
					"$group_members"
			   ;;
			esac
		done
	else
		local var
		for var in gid members name; do
			local _group_$var
			eval f_shell_escape \"\$group_$var\" _group_$var
		done

		# Form the command
		local cmd="pw groupadd -n '$_group_name'"
		[ "$group_gid" ] && cmd="$cmd -g '$_group_gid'"
		[ "$group_members" ] && cmd="$cmd -M '$_group_members'"

		# Execute the command
		local retval err
		if [ "$group_password_disable" ]; then
			f_eval_catch -k err $funcname pw '%s -h -' "$cmd"
		elif [ "$group_password" ]; then
			err=$( echo "$group_password" | f_eval_catch -de \
				$funcname pw '%s -h 0' "$cmd" 2>&1 )
		else
			f_eval_catch -k err $funcname pw '%s' "$cmd"
		fi
		retval=$?
		if [ $retval -ne $SUCCESS ]; then
			f_show_err "%s" "$err"
			return $retval
		fi
	fi

	f_dialog_title "$title"
	$alert "$msg_group_added"
	f_dialog_title_restore
	[ "$no_confirm" -a "$USE_DIALOG" ] && sleep 1

	return $SUCCESS
}

# f_group_delete [$group]
#
# Delete a group. If both $group (as a first argument) and $VAR_GROUP are unset
# or NULL and we are running interactively, prompt the user to select a group
# from a list of available groups. Variables that can be used to script user
# input:
#
# 	VAR_GROUP [Optional if running interactively]
# 		The group to delete. Ignored if given non-NULL first-argument.
#
# Returns success if the group was successfully deleted.
#
f_group_delete()
{
	local funcname=f_group_delete
	local title # Calculated below
	local alert=f_show_msg no_confirm=

	f_getvar $VAR_NO_CONFIRM no_confirm
	[ "$no_confirm" ] && alert=f_show_info

	local input
	f_getvar 3:-\$$VAR_GROUP input "$1"

	local group_name group_password group_gid group_members
	if [ "$input" ] && ! f_input_group "$input"; then
		f_show_err "$msg_group_not_found" "$input"
		return $FAILURE
	fi

	#
	# Loop until the user decides to Exit, Cancel, or presses ESC
	#
	title="$msg_delete $msg_group: $group_name"
	if f_interactive; then
		local mtag retval defaultitem=
		while :; do
        		f_dialog_title "$title"
			f_dialog_menu_group_delete "$group_name" "$defaultitem"
			retval=$?
			f_dialog_title_restore
			f_dialog_menutag_fetch mtag
			f_dprintf "retval=%u mtag=[%s]" $retval "$mtag"
			defaultitem="$mtag"

			# Return if user either pressed ESC or chose Cancel/No
			[ $retval -eq $DIALOG_OK ] || return $FAILURE

			case "$mtag" in
			X) # Delete/Exit
			   local _group_name
			   f_shell_escape "$group_name" _group_name
			   f_eval_catch $funcname pw 'pw groupdel "%s"' \
					"$_group_name" && break
			   ;;
			1) # Group Name (select different group from list)
			   f_dialog_menu_group_list "$group_name" || continue
			   f_dialog_menutag_fetch mtag

			   [ "$mtag" = "X $msg_exit" ] && continue

			   if ! f_input_group "$mtag"; then
				f_show_err "$msg_group_not_found" "$mtag"
				# Attempt to fall back to previous selection
				f_input_group "$input" || return $FAILURE
			   else
				input="$mtag"
			   fi
			   ;;
			esac
		done
	else
		local retval err _group_name
		f_shell_escape "$group_name" _group_name
		f_eval_catch -k err $funcname pw \
			"pw groupdel '%s'" "$_group_name"
		retval=$?
		if [ $retval -ne $SUCCESS ]; then
			f_show_err "%s" "$err"
			return $retval
		fi
	fi

        f_dialog_title "$title"
	$alert "$msg_group_deleted"
	f_dialog_title_restore
	[ "$no_confirm" -a "$USE_DIALOG" ] && sleep 1

	return $SUCCESS
}

# f_group_edit [$group]
#
# Modify a group. If both $group (as a first argument) and $VAR_GROUP are unset
# or NULL and we are running interactively, prompt the user to select a group
# from a list of available groups. Variables that can be used to script user
# input:
#
# 	VAR_GROUP [Optional if running interactively]
# 		The group to modify. Ignored if given non-NULL first-argument.
#	VAR_GROUP_GID [Optional]
# 		Numerical group ID to set. If NULL or unset, the group ID is
# 		unchanged.
# 	VAR_GROUP_MEMBERS [Optional]
# 		Comma separated list of users that are a member of this group.
# 		If set but NULL, group memberships are reset (no users will be
# 		a member of this group). If unset, group membership is
# 		unmodified.
# 	VAR_GROUP_PASSWORD [Optional]
# 		newgrp(1) password to set for the group. If unset, the password
# 		is unmodified. If NULL, the newgrp(1) password is disabled.
#
# Returns success if the group was successfully modified.
#
f_group_edit()
{
	local funcname=f_group_edit
	local title # Calculated below
	local alert=f_show_msg no_confirm=

	f_getvar $VAR_NO_CONFIRM no_confirm
	[ "$no_confirm" ] && alert=f_show_info

	local input
	f_getvar 3:-\$$VAR_GROUP input "$1"

	#
	# NB: pw(8) has a ``feature'' wherein `-n name' can be taken as GID
	# instead of name. Work-around is to also pass `-g GID' at the same
	# time (any GID will do; but `-1' is appropriate for this context).
	#
	if [ "$input" ] && ! f_quietly pw groupshow -n "$input" -g -1; then
		f_show_err "$msg_group_not_found" "$input"
		return $FAILURE
	fi

	if f_interactive && [ ! "$input" ]; then
		f_dialog_menu_group_list || return $SUCCESS
		f_dialog_menutag_fetch input
		[ "$input" = "X $msg_exit" ] && return $SUCCESS
	elif [ ! "$input" ]; then
		f_show_err "$msg_no_group_specified"
		return $FAILURE
	fi

	local group_name group_password group_gid group_members
	if ! f_input_group "$input"; then
		f_show_err "$msg_group_not_found" "$input"
		return $FAILURE
	fi

	f_isset $VAR_GROUP_GID && f_getvar $VAR_GROUP_GID group_gid
	local null_members=
	if f_isset $VAR_GROUP_MEMBERS; then
		f_getvar $VAR_GROUP_MEMBERS group_members
		[ "$group_members" ] || null_members=1
	fi
	local group_password_disable=
	if f_isset $VAR_GROUP_PASSWORD; then
		f_getvar $VAR_GROUP_PASSWORD group_password
		[ "$group_password" ] || group_password_disable=1
	fi

	#
	# Loop until the user decides to Exit, Cancel, or presses ESC
	#
	title="$msg_edit_view $msg_group: $group_name"
	if f_interactive; then
		local mtag retval defaultitem=
		while :; do
			f_dialog_title "$title"
			f_dialog_menu_group_edit "$defaultitem"
			retval=$?
			f_dialog_title_restore
			f_dialog_menutag_fetch mtag
			f_dprintf "retval=%u mtag=[%s]" $retval "$mtag"
			defaultitem="$mtag"

			# Return if user either pressed ESC or chose Cancel/No
			[ $retval -eq $DIALOG_OK ] || return $FAILURE

			case "$mtag" in
			X) # Save/Exit
			   local var
			   for var in gid members name; do
			   	local _group_$var
			   	eval f_shell_escape \
			   		\"\$group_$var\" _group_$var
			   done

			   local cmd="pw groupmod -n '$_group_name'"
			   [ "$group_gid" ] && cmd="$cmd -g '$_group_gid'"
			   [ "$group_members" -o "$null_members" ] &&
			   	cmd="$cmd -M '$_group_members'"

			   # Execute the command (break on success)
			   if [ "$group_password_disable" ]; then
			   	f_eval_catch $funcname pw '%s -h -' "$cmd"
			   elif [ "$group_password" ]; then
			   	echo "$group_password" | f_eval_catch \
			   		$funcname pw '%s -h 0' "$cmd"
			   else
			   	f_eval_catch $funcname pw '%s' "$cmd"
			   fi && break
			   ;;
			1) # Group Name (select different group from list)
			   f_dialog_menu_group_list "$group_name" || continue
			   f_dialog_menutag_fetch mtag

			   [ "$mtag" = "X $msg_exit" ] && continue

			   if ! f_input_group "$mtag"; then
			   	f_show_err "$msg_group_not_found" "$mtag"
			   	# Attempt to fall back to previous selection
			   	f_input_group "$input" || return $FAILURE
			   else
			   	input="$mtag"
			   fi
			   title="$msg_edit_view $msg_group: $group_name"
			   ;;
			2) # Password
			   f_dialog_input_group_password group_password \
			   	group_password_disable
			   ;;
			3) # Group ID
			   f_dialog_input_group_gid group_gid "$group_gid"
			   ;;
			4) # Group Members
			   f_dialog_input_group_members group_members \
			   	"$group_members" && [ ! "$group_members" ] &&
			   	null_members=1
			   ;;
			esac
		done
	else
		local var
		for var in gid members name; do
			local _group_$var
			eval f_shell_escape \"\$group_$var\" _group_$var
		done

		# Form the command
		local cmd="pw groupmod -n '$_group_name'"
		[ "$group_gid" ] && cmd="$cmd -g '$_group_gid'"
		[ "$group_members" -o "$null_members" ] &&
			cmd="$cmd -M '$_group_members'"

		# Execute the command
		local retval err
		if [ "$group_password_disable" ]; then
			f_eval_catch -k err $funcname pw '%s -h -' "$cmd"
		elif [ "$group_password" -o "$null_password" ]; then
			err=$( echo "$group_password" | f_eval_catch -de \
				$funcname pw '%s -h 0' "$cmd" 2>&1 )
		else
			f_eval_catch -k err $funcname pw '%s' "$cmd"
		fi
		retval=$?
		if [ $retval -ne $SUCCESS ]; then
			f_show_err "%s" "$err"
			return $retval
		fi
	fi

	f_dialog_title "$title"
	$alert "$msg_group_updated"
	f_dialog_title_restore
	[ "$no_confirm" -a "$USE_DIALOG" ] && sleep 1

	return $SUCCESS
}

############################################################ MAIN

f_dprintf "%s: Successfully loaded." usermgmt/group.subr

fi # ! $_USERMGMT_GROUP_SUBR