ApplicationLauncher/example/AppTest/SetNetworkInterface.qml

import QtQuick 2.5
import ApplicationLauncher 1.0

Item {
    property string mode: "static"
    property string ifacename: "eth0"
    property string address: "192.168.0.125"
    property string netmask: "255.255.255.0"
    property string gateway: "192.168.0.10"
    property string infile: "/etc/networks/interfaces"
    property string outfile: "/etc/networks/interfaces"

    function doSetInterface() {
        setInterface.launchScript();
    }

    Application {
        id: writeInterfaces
        outFName: outfile
        onAppFinished: {
            console.log("IfaceDone");
        }

        onAppStarted: {
            console.debug("IFACEappStarted :");
        }

        onAppError: {
            console.debug("IFACEappError : " + exitError + " appStatus : " + exitStatus + " appCode " + exitCode );
        }
    }

    Application {
        id: setInterface
        appName: "cat"
        arguments: infile

        onAppFinished: {
            console.debug("AppFinished :");
            //console.debug("appError : " + exitError + " appStatus : " + exitStatus + " appCode " + exitCode );
            console.debug("stdERR :" + stdERR);
            //console.debug("stdOUT :" + stdOUT);
            //console.debug("======================================");

            var lines = stdOUT.split(/[\r\n]+/g);
            var idx = 0;
            var iface = [];
            var inIface = 0;

            lines.forEach(function(entry) {
                if (entry.length > 0) {

                    if(entry.charAt(0) === '#'){
                        //console.log(idx + ":: " + "=======>:" + JSON.stringify(entry));
                    } else {
                        if (entry.indexOf("iface") !== -1){ //Interface Entry start
                            var ifaceEntry = entry.split(" ");
                            if ((ifaceEntry.length >=2) && (ifaceEntry[1] === "eth0")) {
                                iface.push({index: idx, txt: entry});
                                inIface = 1;
                            } else {
                                inIface = 0;
                            }
                        } else {
                            if(inIface === 1) {
                                iface.push({index: idx, txt: entry});
                            }
                        }
                    }
                }
                ++idx;
            });

            lines.splice(iface[0].index, iface[iface.length - 1].index - iface[0].index + 1);

            var insertIdx = iface[0].index;
            var insertText;
            if(mode === "static") {
                insertText = "iface " + ifacename + " inet " + mode;
                lines.splice(insertIdx, 0, insertText);
                ++insertIdx;
                insertText = "\taddress " + address;
                lines.splice(insertIdx, 0, insertText);
                ++insertIdx;
                insertText = "\tnetmask " + netmask;
                lines.splice(insertIdx, 0, insertText);
                ++insertIdx;


                //Broadcas Adresse ausrechnen
                var wrkAddr = address.split(".");
                var ipAddress = new Uint8Array(4);
                var i;

                for (i = 0; i< 4; i++) {
                    ipAddress[i] = wrkAddr[i];
                }

                wrkAddr = netmask.split(".");
                var ipMask = new Uint8Array(4);
                for (i = 0; i< 4; i++) {
                    ipMask[i] = wrkAddr[i];
                }

                var broadcastUINT = new Uint8Array(4);

                for (i = 0; i< 4; i++) {
                    broadcastUINT[i] = ipAddress[i] | (~ipMask[i]);
                }

                var broadcast = broadcastUINT[0] +"." +
                        broadcastUINT[1] +"." + broadcastUINT[2] +"." +
                        broadcastUINT[3];

                insertText = "\tbroadcast " + broadcast;
                lines.splice(insertIdx, 0, insertText);
                ++insertIdx;

                insertText = "\tpost-up echo " + "'nameserver "  + gateway + "' > /etc/resolv.conf";
                lines.splice(insertIdx, 0, insertText);
            } else if (mode === "dhcp") {
                insertText = "iface " + ifacename + " inet " + mode;
                lines.splice(insertIdx, 0, insertText);
                ++insertIdx;
            }

            var cmd = "echo -e " + "\"";
            lines.forEach(function(entry){
                cmd = cmd + entry + "\\n"
                //console.log(JSON.stringify(entry));
            });

            cmd = cmd + "\"";
            writeInterfaces.appName = cmd;
            writeInterfaces.launchScript();

        }

        onAppStarted: {
            console.debug("appStarted :");
            console.debug("appError : " + exitError + " appStatus : " + exitStatus + " appCode " + exitCode );
        }

        onAppError: {
            console.debug("appError : " + exitError + " appStatus : " + exitStatus + " appCode " + exitCode );
        }
    }

}