Wine launcher

/*
    Simple Linux launcher for Windows software, great if you want a simple double-clickable exe that just
    runs windows software emulated through wine. It's not perfect, I did it just to practice some new things I learnt.
    Written to work with Derive, but it can work with other software too, just write the 'launcherconfig' xml file accordingly
    e.g.:

    <?xml version="1.0" encoding="utf-8"?>
    <properties>
        <property name="path">~/Dropbox/SW\ utile/Derive\ 6/</property>
        <property name="exe">Derive6.exe</property>
        <property name="emu">wine</property>
    </properties>

    Requires Mini-XML (http://www.minixml.org/) and wine.

    Compiles with the following command:
    gcc -o myprogram derivel.c -lmxml -lpthread -o launcher

    Run with double click or:
    ./launcher
*/

#include <stdio.h>
#include <string.h>
#include <mxml.h>

int main()
{
    //Valore di return
    int ret=0;

    //Creo l'albero dell'XML
    FILE* config = fopen("launcherconfig", "r");
    if(!config)
    {
        printf(
        "Manca un file di configurazione chiamato 'launcherconfig' nella cartella corrente.\
        \nIl file e' del tipo:\n\
        \n<?xml version=\"1.0\" encoding=\"utf-8\"?>\
        \n<properties>\
        \n\t<property name=\"path\"> path della directory contenente Derive </property>\
        \n\t<property name=\"exe\"> nome dell'eseguibile di Derive </property>\
        \n\t<property name=\"emu\"> wine o altro comando per l'emulazione di eseguibili Windows </property>\
        \n</properties>\n\
        \nCreare tale file e riprovare.\n");
        ret=1;
    }
    else
    {
        mxml_node_t* tree = mxmlLoadFile(NULL, config, MXML_OPAQUE_CALLBACK); //La callback opaque mi consente di tenere conto dei whitespace nei valori dell'XML
        fclose(config);

        //Recupero i valori dall'XML

        mxml_node_t *emuNode = mxmlFindElement(tree, tree, "property", "name", "emu", MXML_DESCEND);
        mxml_node_t *pathNode = mxmlFindElement(tree, tree, "property", "name", "path", MXML_DESCEND);
        mxml_node_t *exeNode = mxmlFindElement(tree, tree, "property", "name", "exe", MXML_DESCEND);

        char* emuname = mxmlGetOpaque(emuNode);
        char* pathdir = mxmlGetOpaque(pathNode);
        char* exename = mxmlGetOpaque(exeNode);

        char* command = NULL;
        asprintf(&command, "$(%s %s%s)>/dev/null 2>&1", emuname, pathdir, exename);

        //printf("comando eseguito:%s\n", command);


        //Chiamo il comando
        ret = system(command);

        //Libero la memoria
        free(command);
        mxmlDelete(tree);
    }
    return ret;
}