rcedit.subr revision 244548 
1if [ ! "$_STARTUP_RCEDIT_SUBR" ]; then _STARTUP_RCEDIT_SUBR=1
2#
3# Copyright (c) 2012 Devin Teske
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD: head/usr.sbin/bsdconfig/startup/share/rcedit.subr 244548 2012-12-21 18:58:19Z dteske $
28#
29############################################################ INCLUDES
30
31BSDCFG_SHARE="/usr/share/bsdconfig"
32. $BSDCFG_SHARE/common.subr || exit 1
33f_include $BSDCFG_SHARE/dialog.subr
34f_include $BSDCFG_SHARE/sysrc.subr
35
36BSDCFG_LIBE="/usr/libexec/bsdconfig" APP_DIR="140.startup"
37f_include_lang $BSDCFG_LIBE/$APP_DIR/include/messages.subr
38
39############################################################ FUNCTIONS
40
41# f_dialog_rcedit $var [[--] $init ...]
42#
43# Allow the user to enter a new value for a given rc.conf(5) variable. If the
44# user does not cancel or press ESC, the variable will be saved without
45# confirmation.
46#
47# If the second argument is non-NULL, it will be processed as the initial text
48# to be displayed, overriding the default behavior to display the currently
49# configured value as the initial text.
50#
51# If instead the second argument is "--", then the third argument (NULL or
52# otherwise) will be treated as the initial text.
53#
54f_dialog_rcedit()
55{
56	local msg var="$1" _input
57
58	msg=$( printf "$msg_please_enter_a_new_value" \
59	              "$var" "$( f_sysrc_get_default "$var" )" )
60
61	shift 1 # var
62	if [ "$1" ]; then
63		[ "$1" = "--" ] && shift 1 # --
64		_input="$1"
65	else
66		_input=$( f_sysrc_get "$var" )
67	fi
68
69	# Return if user has either pressed ESC or chosen Cancel/No
70	_input=$( f_dialog_input "$msg" "$_input" \
71	                         "$hline_alnum_punc_tab_enter"
72	        ) || return
73
74	# Return if the value has not changed from current
75	local cur_val="$( f_sysrc_get "$var" )"
76	[ "$_input" = "$cur_val" ] && return $SUCCESS
77
78	f_dprintf "$var: [$cur_val]->[$_input]"
79
80	err=$( f_sysrc_set "$var" "$_input" 2>&1 ) ||
81		f_show_msg "$err"
82}
83
84fi # ! $_STARTUP_RCEDIT_SUBR
85