xz: Avoid unneeded fstat() on DOS-like systems.

diff --git a/src/xz/file_io.c b/src/xz/file_io.c
index 56acf3b..5eba9d8 100644 (file)
--- a/src/xz/file_io.c
+++ b/src/xz/file_io.c
@@ -621,17 +621,19 @@ io_open_dest_real(file_pair *pair)
                }
        }
 
-       // If this really fails... well, we have a safe fallback.
+#ifndef TUKLIB_DOSLIKE
+       // dest_st isn't used on DOS-like systems except as a dummy
+       // argument to io_unlink(), so don't fstat() on such systems.
        if (fstat(pair->dest_fd, &pair->dest_st)) {
-#if defined(__VMS)
+               // If fstat() really fails, we have a safe fallback here.
+#      if defined(__VMS)
                pair->dest_st.st_ino[0] = 0;
                pair->dest_st.st_ino[1] = 0;
                pair->dest_st.st_ino[2] = 0;
-#elif !defined(TUKLIB_DOSLIKE)
+#      else
                pair->dest_st.st_dev = 0;
                pair->dest_st.st_ino = 0;
-#endif
-#ifndef TUKLIB_DOSLIKE
+#      endif
        } else if (try_sparse && opt_mode == MODE_DECOMPRESS) {
                // When writing to standard output, we need to be extra
                // careful:
@@ -689,8 +691,8 @@ io_open_dest_real(file_pair *pair)
                }
 
                pair->dest_try_sparse = true;
-#endif
        }
+#endif
 
        return false;
 }