use lseek to get size of block devices

diff --git a/vmtar.c b/vmtar.c
index 8a9ab147c7cd25504e9ed844516bb11a1c27b0c9..b1d84841a201103b6c4f7a60f3d6675e90804c8b 100644 (file)
--- a/vmtar.c
+++ b/vmtar.c
@@ -531,15 +531,19 @@ main (int argc, char **argv)
 
     struct sp_array *ma = sparray_new();
     if (sparse) {
-           if (!scan_sparse_file (fd, ma)) {
-                   fprintf (stderr, "scanning '%s' failed\n", source); 
-                   exit (-1);
-           }
+      if (!scan_sparse_file (fd, ma)) {
+       fprintf (stderr, "scanning '%s' failed\n", source); 
+       exit (-1);
+      }
     } else {
-           off_t  file_size = fs.st_size;
-           sparray_add (ma, 0, file_size);
-           ma->real_size = file_size;
-           ma->effective_size = file_size;
+      off_t file_size = lseek(fd, 0, SEEK_END);
+      if (file_size < 0) {
+       fprintf (stderr, "unable to get file size of '%s'\n", source); 
+       exit (-1);
+      }
+      sparray_add (ma, 0, file_size);
+      ma->real_size = file_size;
+      ma->effective_size = file_size;
     }
 
     dump_header (wbuf, archivename, ctime, ma);