[BusyBox] console problem?

[du chunlei]

Hi all,

I built a ramdisk based on BusyBox-1.00-pre8.
Linux-2.4.20 can work with it soomthly. 

However linux-2.6.0 went wrong. I made a workaround by making following 
modifications in Busybox source codes. Since the ramdisk can work with 
Linux-2.4.20 without any modifications. I have been struggling 
against this problem for a long period and look forward to any hints.

Following is what modifications I have made and the corresponding results.   

After I added a few message() statements to somewhere in init_main() function 
in init/init.c like followings, it began to work partly, but the shell
could not exit successful.

        /* Figure out where the default console should be */
        console_init();

        //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$	
        //$$$$$$$$$$$$$ I added following message() $$$$$$$
        //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
        message(CONSOLE, "\r After console_init() and before close(0/1/2)!\n");

        /* Close whatever files are open, and reset the console. */
        close(0);
        close(1);
        close(2);

        if (device_open(console, O_RDWR | O_NOCTTY) == 0) {

            //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$	
            //$$$$$$$$$$$$$ I added following message() $$$$$$$
            //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
            message(CONSOLE, "\rbefore set_term()!\n");

            set_term(0);
            close(0);
         }



Then I added a few out1str() statements in exitshell() function in shell/ash.c 
like followings, it could exit successful and everything seemed ok.

void
exitshell(void)
{
    struct jmploc loc;
    char *p;
    int status;
    int jmp;

    //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$	
    //$$$$$$$$$$$$$ I added following out1str $$$$$$$$$
    //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
    out1str("Entered exitshell()!\n");

    jmp = setjmp(loc.loc);
    status = exitstatus;
    TRACE(("pid %d, exitshell(%d)\n", getpid(), status));
    if (jmp)
        goto out;
    handler = &loc;
    if ((p = trap[0]) != NULL && *p != '\0') {
        trap[0] = NULL;
        evalstring(p);
    }
    flushall();
#ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
    if (iflag && rootshell) {
        const char *hp = lookupvar("HISTFILE");

        if(hp != NULL )
            save_history ( hp );
    }
#endif
out:

    //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$	
    //$$$$$$$$$$$$$ I added following out1str $$$$$$$$$
    //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
    out1str("Just before _exit()!\n");

    _exit(status);
    /* NOTREACHED */
}

Thanks in advance.

Du