freading has an undefined value after repositioning a read-write stream.

[pspp] / tests / test-freading.c

diff --git a/tests/test-freading.c b/tests/test-freading.c
index 3d69c404eaad456dee448348b344dc31e5691425..b2f6fc7b07c4be60510430efe8cd97fab10ef8c8 100644 (file)
--- a/tests/test-freading.c
+++ b/tests/test-freading.c
@@ -97,7 +97,9 @@ main ()
   ASSERT (!freading (fp));
   if (fseek (fp, 0, SEEK_END))
     goto skip;
-  ASSERT (!freading (fp));
+  /* freading (fp) is undefined here, because on some implementations (e.g.
+     glibc) fseek causes a buffer to be read.
+     fwriting (fp) is undefined as well.  */
   if (fclose (fp))
     goto skip;
 
@@ -135,7 +137,9 @@ main ()
   ASSERT (!freading (fp));
   if (fseek (fp, 0, SEEK_END))
     goto skip;
-  ASSERT (!freading (fp));
+  /* freading (fp) is undefined here, because on some implementations (e.g.
+     glibc) fseek causes a buffer to be read.
+     fwriting (fp) is undefined as well.  */
   if (fclose (fp))
     goto skip;