(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 langjähriger Linuxfan und er mag Linux, weil es von ehrlichen und offenen Leuten entworfen wurde. Dies ist einer der Gründe, warum wir es Open Source nennen. Seine Homepage befindet sich unter linuxfocus.org/~guido.

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Einführung

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 .

Schlußbemerkung

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 für deinen Internetzugang
    
  • Shellprogrammierung
    
• pppdialout script
• mktgz script