X-Git-Url: https://git.sven.stormbind.net/?a=blobdiff_plain;f=dump%2Fdump.c;h=8c9637616a6cbce1f7679ea02f675b7200be81bd;hb=HEAD;hp=7ede5508cf8dd839b258951c0862281f5d46a83a;hpb=20b882b37d525f27c85037871c4f35f7ad2c55ba;p=sven%2Fexfatprogs.git

diff --git a/dump/dump.c b/dump/dump.c
index 7ede550..73a231a 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -90,6 +90,12 @@ static int exfat_show_ondisk_all_info(struct exfat_blk_dev *bd)
 		goto free_ppbr;
 	}
 
+	if (memcmp(ppbr->bpb.oem_name, "EXFAT   ", 8) != 0) {
+		exfat_err("Bad fs_name in boot sector, which does not describe a valid exfat filesystem\n");
+		ret = -EINVAL;
+		goto free_ppbr;
+	}
+
 	pbsx = &ppbr->bsx;
 
 	if (pbsx->sect_size_bits < EXFAT_MIN_SECT_SIZE_BITS ||
@@ -125,8 +131,8 @@ static int exfat_show_ondisk_all_info(struct exfat_blk_dev *bd)
 	exfat_info("Cluster Count: \t\t\t\t%u\n", total_clus);
 	exfat_info("Root Cluster (cluster offset): \t\t%u\n", root_clu);
 	exfat_info("Volume Serial: \t\t\t\t0x%x\n", le32_to_cpu(pbsx->vol_serial));
-	exfat_info("Sector Size Bits: \t\t\t%u\n", pbsx->sect_size_bits);
-	exfat_info("Sector per Cluster bits: \t\t%u\n\n", pbsx->sect_per_clus_bits);
+	exfat_info("Bytes per Sector: \t\t\t%u\n", 1 << pbsx->sect_size_bits);
+	exfat_info("Sectors per Cluster: \t\t\t%u\n\n", 1 << pbsx->sect_per_clus_bits);
 
 	bd->cluster_size =
 		1 << (pbsx->sect_per_clus_bits + pbsx->sect_size_bits);
@@ -217,6 +223,7 @@ int main(int argc, char *argv[])
 	bool version_only = false;
 
 	init_user_input(&ui);
+	ui.writeable = false;
 
 	if (!setlocale(LC_CTYPE, ""))
 		exfat_err("failed to init locale/codeset\n");