From 7988979a722b4cdf287b2093956a76a3f19b9897 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@uclibc-ng.org>
Date: Mon, 24 Oct 2016 20:22:12 +0200
Subject: add uClibc-ng test directory

---
 test/mmap/tst-mmap-fflushsync.c | 99 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 test/mmap/tst-mmap-fflushsync.c

(limited to 'test/mmap/tst-mmap-fflushsync.c')

diff --git a/test/mmap/tst-mmap-fflushsync.c b/test/mmap/tst-mmap-fflushsync.c
new file mode 100644
index 0000000..24ae33c
--- /dev/null
+++ b/test/mmap/tst-mmap-fflushsync.c
@@ -0,0 +1,99 @@
+/* Test program for synchronization of stdio state with file after fflush.  */
+
+#include <stdio.h>
+#include <error.h>
+#include <errno.h>
+
+static void do_prepare (void);
+#define PREPARE(argc, argv) do_prepare ()
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include <test-skeleton.c>
+
+static char *temp_file;
+static int temp_fd;
+
+static char text1[] = "Line the first\n";
+static char text2[] = "Line the second\n";
+
+static void
+do_prepare (void)
+{
+  temp_fd = create_temp_file ("tst-mmap-eofsync.", &temp_file);
+  if (temp_fd == -1)
+    error (1, errno, "cannot create temporary file");
+  else
+    {
+      ssize_t cc = write (temp_fd, text1, sizeof text1 - 1);
+      if (cc != sizeof text1 - 1)
+	error (1, errno, "cannot write to temporary file");
+    }
+}
+
+static int
+do_test (void)
+{
+  FILE *f;
+  char buf[128];
+  int result = 0;
+  int c;
+
+  f = fopen (temp_file, "rm");
+  if (f == NULL)
+    {
+      perror (temp_file);
+      return 1;
+    }
+
+  if (fgets (buf, sizeof buf, f) == NULL)
+    {
+      perror ("fgets");
+      return 1;
+    }
+
+  if (strcmp (buf, text1))
+    {
+      printf ("read \"%s\", expected \"%s\"\n", buf, text1);
+      result = 1;
+    }
+
+  printf ("feof = %d, ferror = %d immediately after fgets\n",
+	  feof (f), ferror (f));
+
+  if (fflush (f) != 0)
+    {
+      printf ("fflush failed! %m\n");
+      result = 1;
+    }
+
+  c = write (temp_fd, text2, sizeof text2 - 1);
+  if (c == sizeof text2 - 1)
+    printf ("wrote more to file\n");
+  else
+    {
+      printf ("wrote %d != %zd (%m)\n", c, sizeof text2 - 1);
+      result = 1;
+    }
+
+  if (fgets (buf, sizeof buf, f) == NULL)
+    {
+      printf ("second fgets fails: feof = %d, ferror = %d (%m)\n",
+	      feof (f), ferror (f));
+      clearerr (f);
+      if (fgets (buf, sizeof buf, f) == NULL)
+	{
+	  printf ("retry fgets fails: feof = %d, ferror = %d (%m)\n",
+		  feof (f), ferror (f));
+	  result = 1;
+	}
+    }
+  if (result == 0 && strcmp (buf, text2))
+    {
+      printf ("second time read \"%s\", expected \"%s\"\n", buf, text2);
+      result = 1;
+    }
+
+  fclose (f);
+
+  return result;
+}
-- 
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