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Annotation of 42BSD/sys/stand/drtest.c, revision 1.1

1.1     ! root        1: /*     drtest.c        6.1     83/07/29        */
        !             2: 
        !             3: /*
        !             4:  * Standalone program to test a disk and driver
        !             5:  * by reading the disk a track at a time.
        !             6:  */
        !             7: #include "../h/param.h"
        !             8: #include "../h/inode.h"
        !             9: #include "../h/fs.h"
        !            10: #include "saio.h"
        !            11: 
        !            12: #define SECTSIZ        512
        !            13: 
        !            14: extern int end;
        !            15: char   *malloc();
        !            16: char   *prompt();
        !            17: 
        !            18: main()
        !            19: {
        !            20:        char *cp, *bp;
        !            21:        int fd, tracksize, debug;
        !            22:        register int sector, lastsector;
        !            23:        struct st st;
        !            24: 
        !            25:        printf("Testprogram for stand-alone driver\n\n");
        !            26: again:
        !            27:        cp = prompt("Enable debugging (1=bse, 2=ecc, 3=bse+ecc)? ");
        !            28:        debug = atoi(cp);
        !            29:        if (debug < 0)
        !            30:                debug = 0;
        !            31:        fd = getdevice();
        !            32:        ioctl(fd, SAIODEVDATA, (char *)&st);
        !            33:        printf("Device data: #cylinders=%d, #tracks=%d, #sectors=%d\n",
        !            34:                st.ncyl, st.ntrak, st.nsect);
        !            35:        ioctl(fd, SAIODEBUG, (char *)debug);
        !            36:        tracksize = st.nsect * SECTSIZ;
        !            37:        bp = malloc(tracksize);
        !            38:        printf("Reading in %d byte records\n", tracksize);
        !            39:        printf("Start ...make sure drive is on-line\n");
        !            40:        lseek(fd, 0, 0);
        !            41:        lastsector = st.ncyl * st.nspc;
        !            42:        for (sector = 0; sector < lastsector; sector += st.nsect) {
        !            43:                if (sector && (sector % (st.nspc * 10)) == 0)
        !            44:                        printf("cylinder %d\n", sector/st.nspc);
        !            45:                read(fd, bp, tracksize);
        !            46:        }
        !            47:        goto again;
        !            48: }
        !            49: 
        !            50: /*
        !            51:  * Prompt and verify a device name from the user.
        !            52:  */
        !            53: getdevice()
        !            54: {
        !            55:        register char *cp;
        !            56:        register struct devsw *dp;
        !            57:        int fd;
        !            58: 
        !            59: top:
        !            60:        cp = prompt("Device to read? ");
        !            61:        if ((fd = open(cp, 2)) < 0) {
        !            62:                printf("Known devices are: ");
        !            63:                for (dp = devsw; dp->dv_name; dp++)
        !            64:                        printf("%s ",dp->dv_name);
        !            65:                printf("\n");
        !            66:                goto top;
        !            67:        }
        !            68:        return (fd);
        !            69: }
        !            70: 
        !            71: char *
        !            72: prompt(msg)
        !            73:        char *msg;
        !            74: {
        !            75:        static char buf[132];
        !            76: 
        !            77:        printf("%s", msg);
        !            78:        gets(buf);
        !            79:        return (buf);
        !            80: }
        !            81: 
        !            82: /*
        !            83:  * Allocate memory on a page-aligned address.
        !            84:  * Round allocated chunk to a page multiple to
        !            85:  * ease next request.
        !            86:  */
        !            87: char *
        !            88: malloc(size)
        !            89:        int size;
        !            90: {
        !            91:        char *result;
        !            92:        static caddr_t last = 0;
        !            93: 
        !            94:        if (last == 0)
        !            95:                last = (caddr_t)(((int)&end + 511) & ~0x1ff);
        !            96:        size = (size + 511) & ~0x1ff;
        !            97:        result = (char *)last;
        !            98:        last += size;
        !            99:        return (result);
        !           100: }

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