Seek to the beginning of the device after detecting its size.

dumpexfat relies on this.

diff --git a/libexfat/io.c b/libexfat/io.c
index 886dd23..274dbef 100644 (file)
--- a/libexfat/io.c
+++ b/libexfat/io.c
@@ -176,6 +176,13 @@ struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode)
                        exfat_error("failed to get size of `%s'", spec);
                        return NULL;
                }
+               if (exfat_seek(dev, 0, SEEK_SET) == -1)
+               {
+                       close(dev->fd);
+                       free(dev);
+                       exfat_error("failed to seek to the beginning of `%s'", spec);
+                       return NULL;
+               }
        }
 
 #ifdef USE_UBLIO