mode-sense.c

对SCSI设备 直接存取的通用库

#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <scsi/all.h>



int
main(int argc, char **argv)
{
    SCSI *fd;
    u_char data[0x3fff], *p;
    struct sc_mode_header6 *h6;
    struct sc_mode_header10 *h10;
    struct sc_mode_block_descriptor *bdesc;
    int length, bdno;
    int i, len, nl = 0;

    if ((fd=sc_open(argv[1])) == NULL) {
	fprintf(stderr, "%s: can't open device: %s\n",
		argv[0], strerror(errno));
	exit(1);
    }

    if (sc_mode_sense10(fd, 0x3f, 0, 0, 0x3fff, data) >= 0) {
	h10 = (struct sc_mode_header10 *)data;
	length = h10->length - sizeof(struct sc_mode_header10) + 2;
	bdno = h10->bdno;
	p = data+sizeof(struct sc_mode_header10);
	printf("medium type:\t\t%02x\n", h10->mtype);
	printf("device specific:\t%02x\n", h10->dspec);
    }
    else if (sc_clearerr(fd),
	     sc_mode_sense6(fd, 0x3f, 0, 0, 255, data) >= 0) {
	h6 = (struct sc_mode_header6 *)data;
	length = h6->length - sizeof(struct sc_mode_header10) + 1;
	bdno = h6->bdno;
	p = data+sizeof(struct sc_mode_header6);
	printf("medium type:\t\t%02x\n", h6->mtype);
	printf("device specific:\t%02x\n", h6->dspec);
    }
    else {
	sc_fstatus(fd, stderr, argv[0], "mode-sense-6", 3);
	sc_close(fd);
	exit(1);
    }

    sc_close(fd);

    if (bdno > 0) {
	printf("block descriptors:\n");
	while (bdno > 0) {
	    bdesc = (struct sc_mode_block_descriptor *)p;
	    p += 8;
	    length -= 8;
	    --bdno;

	    printf("\t%02x: %02x%02x%02x / %02x%02x%02x\n",
		   bdesc->dcode,
		   bdesc->nob[0], bdesc->nob[1], bdesc->nob[2],
		   bdesc->bl[0], bdesc->bl[1], bdesc->bl[2]);
	}
	printf("\n");
    }

    printf("pages:\n");
    while (length > 0) {
	len = p[1]+2;
	for (i=0; i<len; i++) {
	    if (i%16 == 0)
		printf("%s\t", (nl ? "\n" : ""));
	    else
		printf(" ");
	    printf("%02x", p[i]);
	}
	nl = 1;
	printf("\n");

	length -= len;
	p += len;
    }
    
    exit(0);
}