xsh_rdstest.c

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/* xsh_rdstest.c - xsh_rdstest */
#include <xinu.h>
#include <stdio.h>

/*------------------------------------------------------------------------
 * xsh_rdstest - shell to print the time the system has been up
 *------------------------------------------------------------------------
 */
shellcmd xsh_rdstest(int nargs, char *args[])
{
    bool8   err;
    int32   retval;
    int32   i, j;
    char    dskname[] = "TestDisk";

    char    buff[2048];
    char    buff2[2048];

    retval = open(RDISK,dskname,"rw");

    if (retval < 0) {
        kprintf("xsh_rdstest: open %s returns %s, stopping\r\n",
            dskname, retval==SYSERR?"SYSERR":"TIMEOUT");
        close( RDISK );
        return 1;
    } else {
        kprintf("xsh_rdstest: open %s returns %d\r\n",
            dskname, retval);
    }

    kprintf("writing eight blocks to the disk\r\n");
    for (i=7; i>=0; i--) {
        memset(buff, (char)(i&0xff), RD_BLKSIZ);
        kprintf("\n\r*** writing block %d\n\r",i);
        retval = write(RDISK, buff, i);
        if (retval < 0) {
           kprintf("write to block %d returns %d\r\n", i, retval);
        }
    }
    kprintf("reading block 1\n\r");
    retval = read(RDISK, buff, 1);
    kprintf("read from block 1 has return value %d\r\n", retval);

    err = 0;
    for (i=0; i<RD_BLKSIZ; i++) {
        if (buff[i] != (char) (0xff&1)) {
            err = 1;
            break;
        }
    }
    if (err == 0) {
        kprintf("Block 1 came back intact!!!\r\n");
    } else {
        kprintf("Sadly  :-( byte %d is not correct!!!\r\n", i);
    }

    kprintf("reading block 6\n\r");
    retval = read(RDISK, buff, 6);
    err = 0;
    for (i=0; i<RD_BLKSIZ; i++) {
        if (buff[i] != (char) (0xff&6)) {
            err = 1;
            break;
        }
    }
    if (err == 0) {
        kprintf("Block 6 came back intact!!!\r\n");
    } else {
        kprintf("Sadly  :-( byte %d is not correct!!!\r\n", i);
    }

    j = 0;
    for (i=0; i<RD_BLKSIZ; i++) {
        buff2[i] = "abcdefghijklmnopqrstuvwxyz"[j++];
        j %= 13;
    }

    kprintf("rewriting block 5\n\r");
    retval = write(RDISK, buff2, 5);
    kprintf("write to block 5 has return value %d\r\n", retval);

    kprintf("reading block 5\n\r");
    retval = read(RDISK, buff2, 5);

    err = 0;
    for (i=0; i<RD_BLKSIZ; i++) {
        if (buff2[i] != buff[i]) {
            err = 1;
            break;
        }
    }

    if (err == 0) {
        kprintf("Block 5 came back intact!!!\r\n");
    } else {
        kprintf("Sadly  :-( byte %d is not correct!!!\r\n", i);
    }

    memset(buff, NULLCH, RD_BLKSIZ);

    kprintf("reading block 6 again\n\r");
    retval = read(RDISK, buff, 6);
    kprintf("read from block 6 has return value %d\r\n", retval);

    err = 0;
    for (i=0; i<RD_BLKSIZ; i++) {
        if ( buff[i] != (char)(0xff&6) ) {
            err = 1;
            break;
        }
    }
    if (err == 0) {
        kprintf("Got back identical results!!!\r\n");
    } else {
        kprintf("Sadly  :-( byte %d differs!!!\r\n", i);
    }
    return 0;
}