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freebsd-nq/usr.sbin/bsdconfig/console/saver
Devin Teske d4ae33f072 Performance and debugging enhancements: 
+ Remove UNAME_P=$(...) from startup/misc -- already supplied by common.subr
+ Use f_getvar instead of $(eval echo \$$var) -- f_getvar is sub-shell free
+ Add `-e' and `-k var' options to f_eval_catch -- increasing use-cases
+ Use f_eval_catch to display errors on failure -- reducing duplicated code
+ Use f_eval_catch when we need output from a command -- improving debugging
+ Optimize f_isinter of strings.subr for performance -- now sub-shell free
+ Improve error checking on pidfiles -- using f_eval_catch and f_isinteger
+ Use $var_to_set arg of f_ifconfig_{inet,netmask} -- eliminate sub-shells
+ Use f_sprintf instead of $(printf ...) -- consolidate sub-shells
+ Use $var_to_set arg of f_route_get_default -- eliminate sub-shells
+ Add f_count to replace $(set -- ...;echo $#) -- eliminate sub-shells
+ Add f_count_ifs to replace $(IFS=x;set -- ...;echo $#) -- no sub-shells
+ Replace var="$var${var:+ }..." in loops with var="$var ..." with a follow-
  up var="${var# }" to trim leading whitespace -- optimize loops
+ Use $var_to_set arg of f_resolv_conf_nameservers -- eliminate sub-shells
+ Comments for the f_eval_catch function
+ Remove a duplicate `local ... desc ...' in f_device_get_all of device.subr
+ Use $var_to_set arg of f_device_capacity -- eliminate sub-shells
+ Whitespace fixes in f_dialog_init of dialog.subr
+ Optimize f_inet_atoi of media/tcpip.subr for performance -- sub-shell free
+ In several cases, send stderr to /dev/null -- clean up runtime execution
+ Change f_err of common.subr to go to program stderr not terminal stderr,
  allowing redirection of output from functions that use f_err
+ Disable debugging when using f_getvar to get variable argument to
  f_startup_rcconf_map_expand of startup/rcconf.subr
+ Use f_replace_all instead of $(echo ... | tr | sed) -- performance
+ Add a $var_to_set option to f_index_{file,menusel_{command,keyword}} of
  common.subr -- centralize sub-shells
2013-12-07 00:31:01 +00:00

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#!/bin/sh
#-
# Copyright (c) 2012-2013 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..." "$0"
f_include $BSDCFG_SHARE/dialog.subr
f_include $BSDCFG_SHARE/mustberoot.subr
f_include $BSDCFG_SHARE/sysrc.subr
BSDCFG_LIBE="/usr/libexec/bsdconfig" APP_DIR="080.console"
f_include_lang $BSDCFG_LIBE/$APP_DIR/include/messages.subr
f_index_menusel_keyword $BSDCFG_LIBE/$APP_DIR/INDEX "$pgm" ipgm &&
pgm="${ipgm:-$pgm}"
############################################################ FUNCTIONS
# dialog_menu_main
#
# Display the dialog(1)-based application main menu.
#
dialog_menu_main()
{
local prompt="$msg_saver_menu_text"
local menu_list="
'1 $msg_none' '$msg_none_saver_desc'
'2 $msg_blank' '$msg_blank_desc'
'3 $msg_beastie' '$msg_beastie_desc'
'4 $msg_daemon' '$msg_daemon_desc'
'5 $msg_dragon' '$msg_dragon_desc'
'6 $msg_fade' '$msg_fade_desc'
'7 $msg_fire' '$msg_fire_desc'
'8 $msg_green' '$msg_green_desc'
'9 $msg_logo' '$msg_logo_desc'
'a $msg_rain' '$msg_rain_desc'
'b $msg_snake' '$msg_snake_desc'
'c $msg_star' '$msg_star_desc'
'd $msg_warp' '$msg_warp_desc'
'$msg_timeout' '$msg_timeout_desc'
" # END-QUOTE
local defaultitem= # Calculated below
local hline="$hline_choose_a_screen_saver"
local height width rows
eval f_dialog_menu_size height width rows \
\"\$DIALOG_TITLE\" \
\"\$DIALOG_BACKTITLE\" \
\"\$prompt\" \
\"\$hline\" \
$menu_list
case "$( f_sysrc_get saver )" in
[Nn][Oo]|'') defaultitem="1 $msg_none" ;;
blank) defaultitem="2 $msg_blank" ;;
beastie) defaultitem="3 $msg_beastie" ;;
daemon) defaultitem="4 $msg_daemon" ;;
dragon) defaultitem="5 $msg_dragon" ;;
fade) defaultitem="6 $msg_fade" ;;
fire) defaultitem="7 $msg_fire" ;;
green) defaultitem="8 $msg_green" ;;
logo) defaultitem="9 $msg_logo" ;;
rain) defaultitem="a $msg_rain" ;;
snake) defaultitem="b $msg_snake" ;;
star) defaultitem="c $msg_star" ;;
warp) defaultitem="d $msg_warp" ;;
esac
local menu_choice
menu_choice=$( eval $DIALOG \
--title \"\$DIALOG_TITLE\" \
--backtitle \"\$DIALOG_BACKTITLE\" \
--hline \"\$hline\" \
--ok-label \"\$msg_ok\" \
--cancel-label \"\$msg_cancel\" \
--default-item \"\$defaultitem\" \
--menu \"\$prompt\" \
$height $width $rows \
$menu_list \
2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD
)
local retval=$?
f_dialog_menutag_store -s "$menu_choice"
return $retval
}
############################################################ MAIN
# Incorporate rc-file if it exists
[ -f "$HOME/.bsdconfigrc" ] && f_include "$HOME/.bsdconfigrc"
#
# Process command-line arguments
#
while getopts h$GETOPTS_STDARGS flag; do
case "$flag" in
h|\?) f_usage $BSDCFG_LIBE/$APP_DIR/USAGE "PROGRAM_NAME" "$pgm" ;;
esac
done
shift $(( $OPTIND - 1 ))
#
# Initialize
#
f_dialog_title "$msg_system_console_screen_saver"
f_dialog_backtitle "${ipgm:+bsdconfig }$pgm"
f_mustberoot_init
#
# Launch application main menu
#
dialog_menu_main || f_die
f_dialog_menutag_fetch mtag
case "$mtag" in
"$msg_timeout") # Set the screen saver timeout interval
f_dialog_title "$msg_value_required"
f_dialog_input blanktime "$msg_enter_timeout_period" \
"$( f_sysrc_get blanktime )" &&
f_eval_catch "$0" f_sysrc_set \
'f_sysrc_set blanktime "%s"' "$blanktime" || f_die
f_dialog_title_restore
exit $SUCCESS
esac
saver_to_set=
case "$mtag" in
"1 $msg_none") # Disable the screensaver
saver_to_set="NO" ;;
"2 $msg_blank") # Simply blank the screen
saver_to_set="blank" ;;
"3 $msg_beastie") # "BSD Daemon" animated screen saver (graphics)
saver_to_set="beastie" ;;
"4 $msg_daemon") # "BSD Daemon" animated screen saver (text)
saver_to_set="daemon" ;;
"5 $msg_dragon") # Dragon screensaver (graphics)
saver_to_set="dragon" ;;
"6 $msg_fade") # Fade out effect screen saver
saver_to_set="fade" ;;
"7 $msg_fire") # Flames effect screen saver
saver_to_set="fire" ;;
"8 $msg_green") # "Green" power saving mode (if supported by monitor)
saver_to_set="green" ;;
"9 $msg_logo") # FreeBSD "logo" animated screen saver (graphics)
saver_to_set="logo" ;;
"a $msg_rain") # Rain drops screen saver
saver_to_set="rain" ;;
"b $msg_snake") # Draw a FreeBSD "snake" on your screen
saver_to_set="snake" ;;
"c $msg_star") # A "twinkling stars" effect
saver_to_set="star" ;;
"d $msg_warp") # A "stars warping" effect
saver_to_set="warp" ;;
esac
if [ "$saver_to_set" ]; then
f_eval_catch "$0" f_sysrc_set \
'f_sysrc_set saver "%s"' "$saver_to_set" || f_die
break
else
f_die 1 "$msg_unknown_saver"
fi
exit $SUCCESS
################################################################################
# END
################################################################################
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