X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=tests%2Ftest-fsync.c;h=eb22ae9e9502de339912922179619a2e1ac4aba9;hb=492fd301bd2018288330c0a20a086b1a8cc611ce;hp=2627d0cba4e5b7b53d0360b3eef8cb2107f042d4;hpb=e250cdd49b74828c25e98efa313954a395160180;p=gnulib.git

diff --git a/tests/test-fsync.c b/tests/test-fsync.c
index 2627d0cba..eb22ae9e9 100644
--- a/tests/test-fsync.c
+++ b/tests/test-fsync.c
@@ -32,18 +32,47 @@ main (void)
   int fd;
   const char *file = "test-fsync.txt";
 
-  if (fsync (0) != 0)
-    {
-      ASSERT (errno == EINVAL /* POSIX */
-              || errno == ENOTSUP /* seen on MacOS X 10.5 */
-              || errno == EBADF /* seen on AIX 7.1 */
-             );
-    }
+  /* Assuming stdin and stdout are ttys, fsync is allowed to fail, but
+     may succeed as an extension.  */
+  for (fd = 0; fd < 2; fd++)
+    if (fsync (fd) != 0)
+      {
+        ASSERT (errno == EINVAL /* POSIX */
+                || errno == ENOTSUP /* seen on MacOS X 10.5 */
+                || errno == EBADF /* seen on AIX 7.1 */
+                || errno == EIO /* seen on mingw */
+                );
+      }
+
+  /* fsync must fail on invalid fd.  */
+  {
+    errno = 0;
+    ASSERT (fsync (-1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    errno = 0;
+    ASSERT (fsync (99) == -1);
+    ASSERT (errno == EBADF);
+  }
+
   fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
   ASSERT (0 <= fd);
   ASSERT (write (fd, "hello", 5) == 5);
   ASSERT (fsync (fd) == 0);
   ASSERT (close (fd) == 0);
+
+  /* For a read-only regular file input file descriptor, fsync should
+     succeed (since at least atime changes can be synchronized).  */
+  fd = open (file, O_RDONLY);
+  ASSERT (0 <= fd);
+  {
+    char buf[1];
+    ASSERT (read (fd, buf, sizeof buf) == sizeof buf);
+  }
+  ASSERT (fsync (fd) == 0);
+  ASSERT (close (fd) == 0);
+
   ASSERT (unlink (file) == 0);
 
   return 0;