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Annotation of coherent/d/conf/tboot/fdisk.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  *
                      3:  * fdisk( fp ) --      Fixed Disk Configuration
                      4:  * dev_t dev;
                      5:  * struct fdisk_s *fp;
                      6:  *
                      7:  *     Input:  fp  = pointer to memory-resident partition info (to update)
                      8:  *
                      9:  *     Action: Read first block from the device.
                     10:  *             If valid signature present on block,
                     11:  *                     copy partition information to memory
                     12:  *
                     13:  *     Return: 1 = partition information successfully updated
                     14:  *             0 = failure (could not read block, or bad signature)
                     15:  */
                     16: 
                     17: #include <sys/coherent.h>
                     18: #include <sys/uproc.h>
                     19: #include <errno.h>
                     20: #include <sys/inode.h>
                     21: #include <sys/fdisk.h>
                     22: #include <sys/buf.h>
                     23: #include <sys/con.h>
                     24: 
                     25: int
                     26: fdisk( fp )
                     27: register FDISK_S *fp;
                     28: {
                     29:        register HDISK_S *hp;
                     30:        BUF *bp, *xbread();
                     31:        int i;
                     32:        int ret = 0;
                     33: 
                     34:        /* xbread() reads relative to the start of the whole disk, rather
                     35:         * than the start of the boot partition.  It also does not
                     36:         * impliment sparse blocks.
                     37:         */
                     38:        if ((BUF *) NULL != (bp = xbread((daddr_t) 0))) {  /* data read */
                     39:                hp = (HDISK_S *) bp->b_paddr;
                     40:                if ( hp->hd_sig == HDSIG ) {    /* valid data */
                     41:                        for (i=0; i < NPARTN; ++i)
                     42:                                *fp++ = hp->hd_partn[i];
                     43:                        ret   = 1;
                     44:                }
                     45:                brelease( bp );
                     46:        }
                     47: 
                     48:        return ret;
                     49: }

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