(X)dialog: Sprechende Shells

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original in en Katja and Guido Socher 

en to de Katja Socher

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Katja ist die deutsche Editorin von LinuxFocus. Sie mag Tux, Film & Fotografie und das Meer. Ihre Homepage befindet sich hier.

Guido ist ein langj�hriger Linuxfan und er mag Linux, weil es von ehrlichen und offenen Leuten entworfen wurde. Dies ist einer der Gr�nde, warum wir es Open Source nennen. Seine Homepage befindet sich unter linuxfocus.org/~guido.

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Einf�hrung

Komm herein zu (X)dialog...

bash
Xdialog --yesno "Do you want to learn more about Xdialog?" 0 0;\
case $? in
0)
echo "Result: Yes chosen.";;
1)
echo "Result: No chosen.";;
255)
echo "ESC pressed.";;
esac

dialog --help
oder
Xdialog --help

Wie es arbeitet

dialog --yesno "text string" <height> <width>

Echte Applikationen

#!/bin/sh
#
#DIALOG=Xdialog
DIALOG=dialog
#
# name of your default isp:
defaultisp=maxnet
#
error()
{
    echo "$1"
    exit 2
}
help()
{
  cat <<HELP
pppdialout -- select an ISP and dial out.
All available ISPs must have a config file in /etc/ppp/peers

pppdialout executes the ppp-on/ppp-off scripts as described
in http://linuxfocus.org/English/March2001/article192.shtml

pppdialout, copyright gpl, http://linuxfocus.org/English/November2002
HELP
  exit 0
}

# parse command line:
while [ -n "$1" ]; do
case $1 in
    -h) help;shift 1;; # function help is called
    --) shift;break;; # end of options
    -*) echo "error: no such option $1. -h for help";exit 1;;
    *)  break;;
esac
done

tempfile=/tmp/pppdialout.$$
trap "rm -f $tempfile" 1 2 5 15

# check if we have a ppp network interface
if /sbin/ifconfig | grep '^ppp' > /dev/null; then
    # we are already online
    $DIALOG --title "go offline" --yesno "Click YES to \
                     terminate the ppp connection" 0 0
    rval="$?"
    clear 
    if [ "$rval" = "0" ]; then
        echo "running /etc/ppp/scripts/ppp-off ..."
        /etc/ppp/scripts/ppp-off
    fi
else
    # no ppp connection found, go online
    # get the names of all available ISP by listing /etc/ppp/peers
    for f in `ls /etc/ppp/peers`; do
        if [ -f "/etc/ppp/peers/$f" ]; then
            isplist="$isplist $f =="
        fi
    done
    [ -z "$isplist" ]&&error "No isp def found in /etc/ppp/peers"
    #
    $DIALOG --default-item "$defaultisp" --title "pppdialout"  \
         --menu "Please select one of\
    the following ISPs for dialout" 0 0 0 $isplist 2> $tempfile
    rval="$?" # return status, isp name will be in $tempfile
    clear
    if [ "$rval" = "0" ]; then
        isp=`cat $tempfile`
        echo "running /etc/ppp/scripts/ppp-on $isp..."  
        /etc/ppp/scripts/ppp-on "$isp"
    else
        echo "Cancel..."    
    fi
    rm -f $tempfile
fi
# end of pppdialout

dialog --menu "text" <height> <width> <menu height> <tag1> <description> ...

isp1 == isp2 == isp3 ==

... als nettesGTK GUI mit Xdialog:




... mit dem curses basierten dialog in einem Terminal:

Weitere Applikationen

mktgz yourpackage .

Schlu�bemerkung

grep -i "somestring" file.txt | sort | uniq | wc -l

Wo bekommt man Xdialog und dialog?

Referenzen

• Xdialog: http://www.chez.com/godefroy/
  dialog: http://hightek.org/dialog/
  
• Xdialog Dokumentation: http://www.chez.com/godefroy/doc/index.html
  
• Andere LinuxFocus Artikel:
  
  • Benutzen verschiedener ISPs f�r deinen Internetzugang
    
  • Shellprogrammierung
    
• pppdialout script
• mktgz script