3 files changed, 62 insertions, 1 deletions
diff --git a/stdio-common/Makefile b/stdio-common/Makefile
index b72e71efa2..2212df2745 100644
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@@ -56,7 +56,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
 	 scanf1 scanf2 scanf3 scanf4 scanf5 scanf7 scanf8 scanf9 scanf10 \
 	 scanf11 scanf12 tst-tmpnam tst-cookie tst-obprintf tst-sscanf \
 	 tst-swprintf tst-fseek tst-fmemopen test-vfprintf tst-gets \
-	 tst-perror tst-sprintf tst-rndseek
+	 tst-perror tst-sprintf tst-rndseek tst-fdopen
 
 test-srcs = tst-unbputc tst-printf
 
diff --git a/stdio-common/tst-fdopen.c b/stdio-common/tst-fdopen.c
new file mode 100644
index 0000000000..bbdc4c88e9
--- /dev/null
+++ b/stdio-common/tst-fdopen.c
@@ -0,0 +1,49 @@
+/* Test for fdopen bugs.  */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#define assert(x) \
+  if (!(x)) \
+    { \
+      fputs ("test failed: " #x "\n", stderr); \
+      retval = 1; \
+      goto the_end; \
+    }
+
+char buffer[256];
+
+int
+main (int argc, char *argv[])
+{
+  char *name;
+  FILE *fp = NULL;
+  int retval = 0;
+  int c, fd;
+
+  name = tmpnam (NULL);
+  fp = fopen (name, "w");
+  assert (fp != NULL)
+  fputs ("foobar and baz", fp);
+  fclose (fp);
+  fp = NULL;
+
+  fd = open (name, O_RDONLY);
+  assert (fd != -1);
+  assert (lseek (fd, 5, SEEK_SET) == 5);
+  /* The file position indicator associated with the new stream is set to
+     the position indicated by the file offset associated with the file
+     descriptor.  */
+  fp = fdopen (fd, "r");
+  assert (fp != NULL);
+  assert (getc (fp) == 'r');
+  assert (getc (fp) == ' ');
+
+the_end:
+  if (fp != NULL)
+    fclose (fp);
+  unlink (name);
+
+  return retval;
+}
diff --git a/stdio-common/tst-ungetc.c b/stdio-common/tst-ungetc.c
index 08819b7765..2cadf1cdaa 100644
--- a/stdio-common/tst-ungetc.c
+++ b/stdio-common/tst-ungetc.c
@@ -18,6 +18,7 @@ main (int argc, char *argv[])
   FILE *fp = NULL;
   int retval = 0;
   int c;
+  char buffer[64];
 
   name = tmpnam (NULL);
   fp = fopen (name, "w");
@@ -40,6 +41,17 @@ main (int argc, char *argv[])
   assert (feof (fp) == 0);
   assert (getc (fp) == c);
   assert (getc (fp) == EOF);
+  fclose (fp);
+  fp = NULL;
+
+  fp = fopen (name, "r");
+  assert (fp != NULL);
+  assert (getc (fp) == 'b');
+  assert (getc (fp) == 'l');
+  assert (ungetc ('b', fp) == 'b');
+  assert (fread (buffer, 1, 64, fp) == 2);
+  assert (buffer[0] == 'b');
+  assert (buffer[1] == 'a');
 
 the_end:
   if (fp != NULL)