(X)dialog: des shells qui parlent

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original in en Katja and Guido Socher 

en to fr Georges Tarbouriech 

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Katja est l'éditrice Allemande de LinuxFocus. Elle aime Tux, le cinéma & la photographie et la mer. Sa page personnelle se trouve ici.

Guido est un fan de Linux de longue date et il apprécie ce système parce qu'il est conçu par des personnes honnêtes et ouvertes. C'est l'une des raisons pour lesquelles on le nomme "source ouverte". Sa page personnelle est à linuxfocus.org/~guido.

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Introduction

Entamons le (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
or
Xdialog --help

Comment ça marche

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

De véritables applications

#!/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 ==

... en tant qu'interface GTK avec Xdialog:




... avec le dialogue curses dans le terminal:

D'autres applications

mktgz votrepaquetage .

Conclusion

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

Où se procurer Xdialog et dialog?

Références

• Xdialog: http://www.chez.com/godefroy/
  dialog: http://hightek.org/dialog/
  
• Documentation Xdialog : http://www.chez.com/godefroy/doc/index.html
  
• article 192: Utiliser differents FAI pour votre accès à Internet
• script pppdialout
• script mktgz
• article 216: Programmation du Shell