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#!/bin/sh
# TODO: lot's of implementation work still open in this library. especially the dialog & $var_UI_TYPE stuff
# Taken from setup. we store dialog output in a file. TODO: can't we do this with variables? ASKDEV
ANSWER="/home/arch/aif/runtime/.dialog-answer"
DIA_MENU_TEXT="Use the UP and DOWN arrows to navigate menus. Use TAB to switch between buttons and ENTER to select."
### Functions that your code can use. Cli/dialog mode is fully transparant. This library takes care of it ###
# display error message and die
die_error ()
{
[ -n "$LOGFILE" ] && debug "die_error: ERROR: $@" > $LOGFILE
notify "ERROR: $@"
exit 2
}
# display warning message
# $1 title
# $2 item to show
# $3 type of item. msg or text if it's a file. (optional. defaults to msg)
show_warning ()
{
[ -z "$1" ] && die_error "show_warning needs a title"
[ -z "$2" ] && die_error "show_warning needs an item to show"
[ -n "$3" -a "$3" != msg -a "$3" != text ] && die_error "show_warning \$3 must be text or msg"
type=msg
[ -n "$3" ] && type=$3
debug "show_warning '$1': $2 ($type)"
if [ "$var_UI_TYPE" = dia ]
then
_dia_DIALOG --title "$1" --exit-label "Continue" --${type}box "$2" 18 70 || die_error "dialog could not show --${type}box $2. often this means a file does not exist"
else
echo "WARNING: $1"
[ "${type}" = msg ] && echo -e "$2"
[ "${type}" = text ] && cat $2 || die_error "Could not cat $2"
fi
return 0
}
#notify user
notify ()
{
debug "notify: $@"
if [ "$var_UI_TYPE" = dia ]
then
_dia_DIALOG --msgbox "$@" 20 50
else
echo -e "$@"
fi
}
# like notify, but user does not need to confirm explicitly when in dia mode
infofy ()
{
debug "infofy: $@"
if [ "$var_UI_TYPE" = dia ]
then
_dia_DIALOG --infobox "$@" 20 50
else
echo -e "$@"
fi
}
# logging of stuff
log ()
{
str="[LOG] `date +"%Y-%m-%d %H:%M:%S"` $@"
if [ "$var_UI_TYPE" = dia ]
then
echo -e "$str" >$LOG
else
echo -e "$str"
fi
echo -e "$str" >> $LOGFILE
}
debug ()
{
str="[DEBUG] $@"
if [ "$DEBUG" = "1" ]
then
if [ "$var_UI_TYPE" = dia ]
then
echo -e "$str" > $LOG
else
echo -e "$str"
fi
echo -e "$str" >> $LOGFILE
fi
}
# taken from setup
printk()
{
case $1 in
"on") echo 4 >/proc/sys/kernel/printk ;;
"off") echo 0 >/proc/sys/kernel/printk ;;
esac
}
# TODO: pass disks as argument to decouple backend logic
# Get a list of available disks for use in the "Available disks" dialogs. This
# will print the disks as follows, getting size info from hdparm:
# /dev/sda: 640133 MBytes (640 GB)
# /dev/sdb: 640135 MBytes (640 GB)
_getavaildisks()
{
# NOTE: to test as non-root, stick in a 'sudo' before the hdparm call
for i in $(finddisks); do echo -n "$i: "; hdparm -I $i | grep -F '1000*1000' | sed "s/.*1000:[ \t]*\(.*\)/\1/"; echo "\n"; done
}
ask_checklist () #TODO
{
true
}
# TODO: we should have a wrapper around this function that keeps trying until the user entered a valid numeric?, maybe a wrapper that wraps all functions
# ask for a number.
# $1 question
# $2 lower limit (optional)
# $3 upper limit (optional)
# TODO: implement a default number
# echo's the number the user said
# returns 1 if the user cancelled or did not enter a numeric, 0 otherwise
ask_number ()
{
[ -z "$1" ] && die_error "ask_number needs a question!"
[ -n "$2" ] && [[ $2 = *[^0-9]* ]] && die_error "ask_number \$2 must be a number! not $2"
[ -n "$3" ] && [[ $3 = *[^0-9]* ]] && die_error "ask_number \$3 must be a number! not $3"
[ "$var_UI_TYPE" = dia ] && { _dia_ask_number "$1" "$2" "$3" ; return $? ; }
[ "$var_UI_TYPE" = cli ] && { _cli_ask_number "$1" "$2" "$3" ; return $? ; }
}
# ask the user to choose something
# $1 default item (set to 'no' for none)
# $2 title
# shift;shift; $@ list of options. first tag. then name. (eg tagA itemA "tag B" 'item B' )
# the response will be echoed to stdout. but also $ANSWER_OPTION will be set. take that because the former method seems to not work.
# $? if user cancelled. 0 otherwise
ask_option ()
{
[ "$var_UI_TYPE" = dia ] && { _dia_ask_option "$@" ; return $? ; }
[ "$var_UI_TYPE" = cli ] && { _cli_ask_option "$@" ; return $? ; }
}
# ask the user a password. return is stored in $PASSWORD or $<TYPE>_PASSWORD
# $1 type (optional. eg 'svn', 'ssh').
ask_password ()
{
[ "$var_UI_TYPE" = dia ] && { _dia_ask_password "$@" ; return $? ; }
[ "$var_UI_TYPE" = cli ] && { _cli_ask_password "$@" ; return $? ; }
}
# ask for a string.
# $1 question
# $2 default (optional)
# $3 exitcode to use when string is empty and there was no default, or default was ignored (1 default)
# echo's the string the user gave.
# returns 1 if the user cancelled, 0 otherwise
ask_string ()
{
[ -z "$1" ] && die_error "ask_string needs a question!"
[ "$var_UI_TYPE" = dia ] && { _dia_ask_string "$1" "$2" ; return $? ; }
[ "$var_UI_TYPE" = cli ] && { _cli_ask_string "$1" "$2" ; return $? ; }
}
# ask a yes/no question.
# $1 question
# returns 0 if response is yes/y (case insensitive). 1 otherwise
# TODO: support for default answer
ask_yesno ()
{
[ -z "$1" ] && die_error "ask_yesno needs a question!"
[ "$var_UI_TYPE" = dia ] && { _dia_ask_yesno "$@" ; return $? ; }
[ "$var_UI_TYPE" = cli ] && { _cli_ask_yesno "$@" ; return $? ; }
}
# follow the progress of something by showing it's log, updating real-time
# $1 title
# $2 logfile
follow_progress ()
{
[ -z "$1" ] && die_error "follow_progress needs a title!"
[ -z "$2" ] && die_error "follow_progress needs a logfile to follow!"
[ "$var_UI_TYPE" = dia ] && { _dia_follow_progress "$1" "$2" ; return $? ; }
[ "$var_UI_TYPE" = cli ] && { _cli_follow_progress "$1" "$2" ; return $? ; }
}
### Internal functions, supposed to be only used internally in this library ###
# DIALOG() taken from setup
# an el-cheapo dialog wrapper
#
# parameters: see dialog(1)
# returns: whatever dialog did
_dia_DIALOG()
{
dialog --backtitle "$TITLE" --aspect 15 "$@"
return $?
}
_dia_ask_checklist () #TODO: implement this
{
_dia_DIALOG --checklist "$1" $list
}
_dia_ask_number ()
{
#TODO: i'm not entirely sure this works perfectly. what if user doesnt give anything or wants to abort?
while true
do
str="$1"
[ -n "$2" ] && str2="min $2"
[ -n "$3" ] && str2="$str2 max $3"
[ -n "$str2" ] && str="$str ( $str2 )"
_dia_DIALOG --inputbox "$str" 8 65 "$4" 2>$ANSWER
ret=$?
ANSWER_NUMBER=`cat $ANSWER`
if [[ $ANSWER_NUMBER = *[^0-9]* ]] #TODO: handle exit state
then
show_warning "$ANSWER_NUMBER is not a number! try again."
else
break
fi
done
echo "$ANSWER_NUMBER"
debug "_dia_ask_number: user entered: $ANSWER_NUMBER"
[ -z "$ANSWER_NUMBER" ] && return 1
return $?
}
_dia_ask_option ()
{
DEFAULT=""
[ "$1" != 'no' ] && DEFAULT="--default-item $1"
[ -z "$2" ] && die_error "ask_option \$2 must be the title"
[ -z "$6" ] && debug "_dia_ask_option args: $@" && die_error "ask_option makes only sense if you specify at least 2 things (with tag and name)"
DIA_MENU_TITLE=$2
shift 2
_dia_DIALOG $DEFAULT --colors --title " $DIA_MENU_TITLE " --menu "$DIA_MENU_TEXT" 16 55 8 "$@" 2>$ANSWER
ret=$?
ANSWER_OPTION=`cat $ANSWER`
echo $ANSWER_OPTION
debug "dia_ask_option: User choose $ANSWER_OPTION"
return $ret
}
_dia_ask_password ()
{
if [ -n "$1" ]
then
type_l=`tr '[:upper:]' '[:lower:]' <<< $1`
type_u=`tr '[:lower:]' '[:upper:]' <<< $1`
else
type_l=
type_u=
fi
_dia_DIALOG --passwordbox "Enter your $type_l password" 8 65 "$2" 2>$ANSWER
ret=$?
[ -n "$type_u" ] && read ${type_u}_PASSWORD < $ANSWER
[ -z "$type_u" ] && read PASSWORD < $ANSWER
cat $ANSWER
debug "_dia_ask_password: user entered <<hidden>>"
return $ret
}
_dia_ask_string ()
{
exitcode=${3:-1}
_dia_DIALOG --inputbox "$1" 8 65 "$2" 2>$ANSWER
ret=$?
ANSWER_STRING=`cat $ANSWER`
echo $ANSWER_STRING
debug "_dia_ask_string: user entered $ANSWER_STRING"
[ -z "$ANSWER_STRING" ] && return $exitcode
return $ret
}
_dia_ask_yesno ()
{
height=$((`echo -e "$1" | wc -l` +7))
dialog --yesno "$1" $height 55 # returns 0 for yes, 1 for no
ret=$?
[ $ret -eq 0 ] && debug "dia_ask_yesno: User picked YES"
[ $ret -gt 0 ] && debug "dia_ask_yesno: User picked NO"
return $ret
}
_dia_follow_progress ()
{
title=$1
logfile=$2
_dia_DIALOG --title "$1" --no-kill --tailboxbg "$2" 18 70 2>$ANSWER
}
_cli_ask_number ()
{
#TODO: i'm not entirely sure this works perfectly. what if user doesnt give anything or wants to abort?
while true
do
str="$1"
[ -n "$2" ] && str2="min $2"
[ -n "$3" ] && str2="$str2 max $3"
[ -n "$str2" ] && str="$str ( $str2 )"
echo "$str"
read ANSWER_NUMBER
if [[ $ANSWER_NUMBER = *[^0-9]* ]]
then
show_warning "$ANSWER_NUMBER is not a number! try again."
else
break
fi
done
echo "$ANSWER_NUMBER"
debug "cli_ask_number: user entered: $ANSWER_NUMBER"
[ -z "$ANSWER_NUMBER" ] && return 1
return 0
}
_cli_ask_option ()
{
#TODO: strip out color codes
#TODO: if user entered incorrect choice, ask him again
DEFAULT=""
[ "$1" != 'no' ] && DEFAULT=$1
[ -z "$2" ] && die_error "ask_option \$2 must be the title"
[ -z "$6" ] && debug "_cli_ask_option args: $@" && die_error "ask_option makes only sense if you specify at least 2 things (with tag and name)"
CLI_MENU_TITLE=$2
shift 2
echo "$CLI_MENU_TITLE"
while [ -n "$1" ]
do
echo "$1 ] $2"
shift 2
done
echo "CANCEL ] CANCEL"
[ -n "$DEFAULT" ] && echo -n " > [ $DEFAULT ] "
[ -z "$DEFAULT" ] && echo -n " > "
read ANSWER_OPTION
[ -z "$ANSWER_OPTION" -a -n "$DEFAULT" ] && ANSWER_OPTION="$DEFAULT"
debug "cli_ask_option: User choose $ANSWER_OPTION"
echo "$ANSWER_OPTION"
[ "$ANSWER_OPTION" = CANCEL ] && return 1
return 0
}
_cli_ask_password ()
{
if [ -n "$1" ]
then
type_l=`tr '[:upper:]' '[:lower:]' <<< $1`
type_u=`tr '[:lower:]' '[:upper:]' <<< $1`
else
type_l=
type_u=
fi
echo -n "Enter your $type_l password: "
stty -echo
[ -n "$type_u" ] && read ${type_u}_PASSWORD
[ -z "$type_u" ] && read PASSWORD
stty echo
echo
}
# $3 -z string behavior: always take default if applicable, but if no default then $3 is the returncode (1 is default)
_cli_ask_string ()
{
exitcode=${3:-1}
echo "$1: "
[ -n "$2" ] && echo "(Press enter for default. Default: $2)"
echo -n ">"
read ANSWER_STRING
echo "$ANSWER_STRING"
debug "cli_ask_string: User entered: $ANSWER_STRING"
if [ -z "$ANSWER_STRING" ]
then
if [ -n "$2" ]
then
ANSWER_STRING=$2
else
return $exitcode
fi
fi
return 0
}
_cli_ask_yesno ()
{
echo -n "$1 (y/n): "
read answer
answer=`tr '[:upper:]' '[:lower:]' <<< $answer`
if [ "$answer" = y -o "$answer" = yes ]
then
debug "cli_ask_yesno: User picked YES"
return 0
else
debug "cli_ask_yesno: User picked NO"
return 1
fi
}
_cli_follow_progress ()
{
title=$1
logfile=$2
echo "Title: $1"
tail -f $2
#TODO: don't block anymore when it's done
}
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