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freebsd-nq/usr.sbin/bsdconfig/console/ttys
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:-$pgm}"
############################################################ CONFIGURATION
#
# Location of ttys(5)
#
ETC_TTYS=/etc/ttys
############################################################ FUNCTIONS
# dialog_menu_main
#
# Display the dialog(1)-based application main menu.
#
dialog_menu_main()
{
local prompt="$msg_ttys_menu_text"
local menu_list="
'1 $msg_none' '$msg_none_ttys_desc'
'2 $msg_ibm_437_vga_default' 'cons25'
'3 $msg_iso_8859_1' 'cons25l1'
'4 $msg_iso_8859_2' 'cons25l2'
'5 $msg_iso_8859_7' 'cons25l7'
'6 $msg_koi8_r' 'cons25r'
'7 $msg_koi8_u' 'cons25u'
'8 $msg_us_ascii' 'cons25w'
" # END-QUOTE
local hline="$hline_choose_a_terminal_type"
local height width rows
eval f_dialog_menu_size height width rows \
\"\$DIALOG_TITLE\" \
\"\$DIALOG_BACKTITLE\" \
\"\$prompt\" \
\"\$hline\" \
$menu_list
local menu_choice
menu_choice=$( eval $DIALOG \
--title \"\$DIALOG_TITLE\" \
--backtitle \"\$DIALOG_BACKTITLE\" \
--hline \"\$hline\" \
--ok-label \"\$msg_ok\" \
--cancel-label \"\$msg_cancel\" \
--menu \"\$prompt\" \
$height $width $rows \
$menu_list \
2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD
)
local retval=$?
f_dialog_menutag_store -s "$menu_choice"
if [ $retval -eq $DIALOG_OK ]; then
local item
item=$( eval f_dialog_menutag2item \
\"\$menu_choice\" $menu_list )
f_dialog_menuitem_store "$item"
fi
return $retval
}
# ttys_set_type $consterm
#
# Set terminal type of `ttyv*' and `cons[0-9]' entries in ttys(5) to $consterm.
#
ttys_set_type()
{
local funcname=ttys_set_type
local consterm="$1" err
#
# Create new temporary file to write our ttys(5) update with new types.
#
local tmpfile
f_eval_catch -k tmpfile $funcname mktemp 'mktemp -t "%s"' "$pgm" ||
return $FAILURE
#
# Fixup permissions and ownership (mktemp(1) creates the temporary file
# with 0600 permissions -- change the permissions and ownership to
# match ttys(5) before we write it out and mv(1) it into place).
#
local mode owner
f_eval_catch -dk mode $funcname stat \
'stat -f "%%#Lp" "%s"' "$ETC_TTYS" || mode=0644
f_eval_catch -dk owner $funcname stat \
'stat -f "%%u:%%g" "%s"' "$ETC_TTYS" || owner="root:wheel"
f_eval_catch -d $funcname chmod 'chmod "%s" "%s"' "$mode" "$tmpfile"
f_eval_catch -d $funcname chown 'chown "%s" "%s"' "$owner" "$tmpfile"
#
# Operate on ttys(5), replacing only the types of `ttyv*' and
# `cons[0-9]' terminals with the new type.
#
if ! err=$( awk -v consterm="$consterm" '
BEGIN {
}
{
# "Skip" blank-lines, lines containing only whitespace, and
# lines containing only a comment or whitespace-then-comment.
#
if ( $0 ~ /^[[:space:]]*(#|$)/ ) { print; next }
# "Skip" terminal types other than those supported
#
if ( $1 !~ /^(ttyv.*|cons[0-9])$/ ) { print; next }
# Change the terminal type to the new value
#
match($0, /[[:alnum:]\.\+-_]+[[:space:]]+(on|off).*$/)
if ( ! RSTART ) { print; next }
left = substr($0, 0, RSTART - 1)
match($0, /[[:space:]]+(on|off).*$/)
right = substr($0, RSTART)
printf "%s%s%s\n", left, consterm, right
}
' "$ETC_TTYS" > "$tmpfile" 2>&1 ); then
f_dialog_msgbox "$err"
return $FAILURE
fi
f_eval_catch $funcname mv 'mv -f "%s" "%s"' "$tmpfile" "$ETC_TTYS" ||
return $FAILURE
return $SUCCESS
}
############################################################ MAIN
# Incorporate rc-file if it exists
[ -f "$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_terminal_type"
f_dialog_backtitle "${ipgm:+bsdconfig }$pgm"
f_mustberoot_init
#
# Launch application main menu
#
dialog_menu_main || f_die
f_dialog_menutag_fetch mtag
[ "$mtag" = "1 $msg_none" ] && exit $SUCCESS
f_dialog_menuitem_fetch consterm
ttys_set_type "$consterm" || f_die
exit $SUCCESS
################################################################################
# END
################################################################################
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