cdda.c

使用libscsi做的一系列cdrom操作工具程序。包含cdwrite,cdflush,cdda三个程序

#include <scsi/all.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "cdda.h"



#define USAGE	"usage: %s [-chvV] [-b blocks] [-m mode] dev file start [end]\n"
#define OPTS	"b:chm:vV"

#define HELP	USAGE "\
%s\n\n\
  -b: number of blocks read at once\n\
  -h: display this help message and exit\n\
  -m: specify mode to use\n\
  -v: verbose\n\
  -V: display version and exit\n\
\n\
start and end time syntax: track[/index] or [track/]mm:ss[:ff]\n\
  end time defaults to end of track\n"



char *modes[] = {
    "",
    "toshiba",
    "hp",
    "yamaha",
    NULL
};



char *prg;
extern char version[];

extern int opterr, optind;
extern char *optarg;



int 
main(int argc, char **argv)
{
    int nblocks = 25, verbose = 0, checkonly = 0;
    char *device, *file, *st, *en;
    enum mode mode = m_unspec;

    SCSI *fd;
    FILE *fout;
    u_long start, end;

    int err, c, i;
    struct sc_inquiry inq;

    prg = argv[0];

    /* process command line args */

    opterr = 0;

    while ((c = getopt(argc, argv, OPTS)) != EOF)
	switch (c) {
	case 'v':
	    verbose = 1;
	    break;
	case 'c':
	    checkonly = 1;
	    break;
	case 'b':
	    nblocks = atoi(optarg);
	    break;

	case 'm':
	    for (i=0; modes[i]; i++)
		if (!strcmp(modes[i], optarg)) {
		    mode = i;
		    break;
		}
	    if (mode == m_unspec) {
		fprintf(stderr, "%s: unknown mode %s\n",
			prg, optarg);
		exit(1);
	    }
	    break;

	case 'V':
	    printf("%s", version);
	    exit(0);
	case 'h':
	    printf(HELP, prg, version);
	    exit(0);
	case '?':
	    fprintf(stderr, USAGE, prg);
	    exit(1);
	}

    if (optind != argc-3 && optind != argc-4) {
	fprintf(stderr, USAGE, prg);
	exit(1);
    }
    device = argv[optind];
    file = argv[optind+1];
    st = argv[optind+2];
    en = (optind == argc-4 ? argv[optind+3] : NULL);


    /* open device */

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


    /* translate start and end time */

    if ((start=translate(fd, st)) < 0
	|| (end=translate(fd, en)) < 0) {
	sc_close(fd);
	exit(1);
    }


    /* figure out mode to use */

    if (mode == m_unspec) {
	if (sc_inquiry(fd, &inq) < 0) {
	    sc_fstatus(fd, stderr, prg, "inquiry", 3);
	    sc_close(fd);
	    exit(1);
	}
	if (!strcmp(inq.vendor, "TOSHIBA"))
	    mode = m_toshiba;
	else if (!strcmp(inq.vendor, "HP"))
	    mode = m_hp;
	else if (!strcmp(inq.vendor, "YAMAHA"))
	    mode = m_yamaha;
	else {
	    fprintf(stderr, "%s: unrecognized cdrom (%s, %s)\n",
		    prg, inq.vendor, inq.product);
	    sc_close(fd);
	    exit(1);
	}
    }


    /* verbose and check-only */

    if (verbose || checkonly) {
	printf("using mode `%s', copying lba 0x%lx -- 0x%lx\n",
	       modes[mode], start, end);
	if (checkonly)
	    exit(0);
    }
    

    /* open file */

    if ((fout=fopen(file, "w")) == NULL) {
	fprintf(stderr, "%s: can'to open file `%s': %s\n",
		prg, file, strerror(errno));
	sc_close(fd);
	exit(1);
    }


    /* copy data */

    err = do_read(mode, fd, fout, start, end, nblocks);


    /* cleanup and exit */

    sc_close(fd);
    fclose(fout);

    exit(err ? 1 : 0);
}