1 files changed, 81 insertions, 0 deletions
diff --git a/test/mmap/tst-mmap-setvbuf.c b/test/mmap/tst-mmap-setvbuf.c
new file mode 100644
index 000000000..33d60b7bd
--- /dev/null
+++ b/test/mmap/tst-mmap-setvbuf.c
@@ -0,0 +1,81 @@
+/* Test setvbuf on readonly fopen (using mmap stdio).
+   Copyright (C) 2002-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int main (void)
+{
+  char name[] = "/tmp/tst-mmap-setvbuf.XXXXXX";
+  char buf[4096];
+  const char * const test = "Let's see if mmap stdio works with setvbuf.\n";
+  char temp[strlen (test) + 1];
+  int fd = mkstemp (name);
+  FILE *f;
+
+  if (fd == -1)
+    {
+      printf ("%u: cannot open temporary file: %m\n", __LINE__);
+      exit (1);
+    }
+
+  f = fdopen (fd, "w");
+  if (f == NULL)
+    {
+      printf ("%u: cannot fdopen temporary file: %m\n", __LINE__);
+      exit (1);
+    }
+
+  fputs (test, f);
+  fclose (f);
+
+  f = fopen (name, "rm");
+  if (f == NULL)
+    {
+      printf ("%u: cannot fopen temporary file: %m\n", __LINE__);
+      exit (1);
+    }
+
+  if (setvbuf (f, buf, _IOFBF, sizeof buf))
+    {
+      printf ("%u: setvbuf failed: %m\n", __LINE__);
+      exit (1);
+    }
+
+  if (fread (temp, 1, strlen (test), f) != strlen (test))
+    {
+      printf ("%u: couldn't read the file back: %m\n", __LINE__);
+      exit (1);
+    }
+  temp [strlen (test)] = '\0';
+
+  if (strcmp (test, temp))
+    {
+      printf ("%u: read different string than was written:\n%s%s",
+	      __LINE__, test, temp);
+      exit (1);
+    }
+
+  fclose (f);
+
+  unlink (name);
+  exit (0);
+}