1 files changed, 68 insertions, 0 deletions
diff --git a/stdio/test-fwrite.c b/stdio/test-fwrite.c
new file mode 100644
index 0000000000..cc6cdf038e
--- /dev/null
+++ b/stdio/test-fwrite.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <string.h>
+
+int
+main ()
+{
+  FILE *f = tmpfile ();
+  char obuf[99999], ibuf[sizeof obuf];
+  char *line;
+  size_t linesz;
+
+  if (! f)
+    {
+      perror ("tmpfile");
+      return 1;
+    }
+
+  if (fputs ("line\n", f) == EOF)
+    {
+      perror ("fputs");
+      return 1;
+    }
+
+  memset (obuf, 'z', sizeof obuf);
+  memset (ibuf, 'y', sizeof ibuf);
+  
+  if (fwrite (obuf, sizeof obuf, 1, f) != 1)
+    {
+      perror ("fwrite");
+      return 1;
+    }
+
+  rewind (f);
+
+  line = NULL;
+  linesz = 0;
+  if (getline (&line, &linesz, f) != 5)
+    {
+      perror ("getline");
+      return 1;
+    }
+  if (strcmp (line, "line\n"))
+    {
+      puts ("Lines differ.  Test FAILED!");
+      return 1;
+    }
+
+  if (fread (ibuf, sizeof ibuf, 1, f) != 1)
+    {
+      perror ("fread");
+      return 1;
+    }
+
+  if (memcmp (ibuf, obuf, sizeof ibuf))
+    {
+      puts ("Buffers differ.  Test FAILED!");
+      return 1;
+    }
+
+  asprintf (&line, "\
+GDB is free software and you are welcome to distribute copies of it\n\
+ under certain conditions; type \"show copying\" to see the conditions.\n\
+There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
+");
+
+  puts ("Test succeeded.");
+  return 0;
+}