f375ea19c6
and print out volume label and creation time -if the drive cannot be open()ed read-write, try read-only and print the information
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/* $NetBSD: iso9660.c,v 1.1 2004/07/04 14:11:44 drochner Exp $ */
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#include <sys/types.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdio.h>
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#include <err.h>
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#include <isofs/cd9660/iso.h>
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#include "mscdlabel.h"
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#define BLKSIZ ISO_DEFAULT_BLOCK_SIZE
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static void
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printinfo(struct iso_primary_descriptor *vd)
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{
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char label[32 + 1], date[] = "yyyy/mm/dd hh:mm", *d;
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strlcpy(label, vd->volume_id, sizeof(label));
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d = vd->creation_date;
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memcpy(date, d, 4); /* year */
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memcpy(date + 5, d + 4, 2); /* month */
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memcpy(date + 8, d + 6, 2); /* day */
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memcpy(date + 11, d + 8, 2); /* hour */
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memcpy(date + 14, d + 10, 2); /* min */
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printf("ISO filesystem, label \"%s\", creation time: %s\n",
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label, date);
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}
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int
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check_primary_vd(int fd, int start, int len)
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{
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int i, res, isiso;
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struct iso_primary_descriptor *vd;
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isiso = 0;
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vd = malloc(BLKSIZ);
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for (i = 16; (i < 100) && (i < len); i++) {
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res = pread(fd, vd, BLKSIZ, (start + i) * BLKSIZ);
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if (res < 0) {
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warn("read CD sector %d", start + i);
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break;
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}
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if (memcmp(vd->id, ISO_STANDARD_ID, sizeof(vd->id)))
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continue;
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if (isonum_711(vd->type) == ISO_VD_PRIMARY) {
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printinfo(vd);
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isiso = 1;
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break;
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} else if (isonum_711(vd->type) == ISO_VD_END)
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break;
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}
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free(vd);
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return (isiso);
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}
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