source: psi/trunk/qcm/dnotify.qcm@ 189

/*
-----BEGIN QCMOD-----
name: Linux Directory Notification
-----END QCMOD-----
*/

#include<unistd.h>
#include<fcntl.h>
#include<signal.h>
#include<sys/utsname.h>

//----------------------------------------------------------------------------
// qc_dnotify
//----------------------------------------------------------------------------
class qc_dnotify : public ConfObj
{
public:
        qc_dnotify(Conf *c) : ConfObj(c)
        {
        }

        ~qc_dnotify()
        {
                remove("ftest.c");
                remove("ftest.o");
        }

        QString name() const { return "Linux Directory Notification"; }
        QString shortname() const { return "dnotify"; }

        bool do_write()
        {
                char *fdata =
                        "#define _GNU_SOURCE\n"
                        "#include<unistd.h>\n"
                        "#include<fcntl.h>\n"
                        "#include<signal.h>\n"
                        "#include<sys/utsname.h>\n"
                        "\n"
                        "int main()\n"
                        "{\n"
                        "    DN_DELETE|DN_CREATE|DN_RENAME|DN_MULTISHOT|DN_MODIFY|DN_ATTRIB;\n"
                        "    return 0;\n"
                        "}\n";

                FILE *f;
                f = fopen("ftest.c", "w");
                if(!f)
                        return false;
                fwrite(fdata, strlen(fdata), 1, f);
                fclose(f);

                return true;
        }

        bool do_compile()
        {
                QString str = conf->qvar("QMAKE_CC") + " -c ftest.c -o ftest.o";
                int r = conf->doCommand(str);
                if(r == 0)
                        return true;
                else
                        return false;
        }

        bool exec()
        {
                // taken from KDE
                bool supports_dnotify = true; // not guilty until proven guilty
                struct utsname uts;
                int major, minor, patch;
                if(uname(&uts) < 0)
                        supports_dnotify = false; // *shrug*
                else if(sscanf(uts.release, "%d.%d.%d", &major, &minor, &patch) != 3)
                        supports_dnotify = false; // *shrug*
                else if( major * 1000000 + minor * 1000 + patch < 2004019 ) // <2.4.19
                        supports_dnotify = false;
                if(!supports_dnotify)
                        return false;

                if(!do_write())
                        return false;
                if(!do_compile())
                        return false;

                conf->addDefine("HAVE_DNOTIFY");
                return true;
        }
};