2 files changed, 101 insertions, 1 deletions
diff --git a/libio/Makefile b/libio/Makefile
index a6d3a24cc1..72a6badabd 100644
--- a/libio/Makefile
+++ b/libio/Makefile
@@ -53,7 +53,7 @@ tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc   \
 	tst-mmap-setvbuf bug-ungetwc1 bug-ungetwc2 tst-atime tst-eof          \
 	tst-freopen bug-rewind bug-rewind2 bug-ungetc bug-fseek \
 	tst-mmap-eofsync tst-mmap-fflushsync bug-mmap-fflush \
-	tst-mmap2-eofsync tst-mmap-offend
+	tst-mmap2-eofsync tst-mmap-offend bug-fopena+
 test-srcs = test-freopen
 
 all: # Make this the default target; it will be defined in Rules.
diff --git a/libio/bug-fopena+.c b/libio/bug-fopena+.c
new file mode 100644
index 0000000000..5446de1592
--- /dev/null
+++ b/libio/bug-fopena+.c
@@ -0,0 +1,100 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static int fd;
+static char *fname;
+
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+
+#define TEST_FUNCTION do_test ()
+static int do_test (void);
+#include "../test-skeleton.c"
+
+
+static void
+prepare (void)
+{
+  fd = create_temp_file ("wrewind.", &fname);
+  if (fd == -1)
+    exit (3);
+}
+
+
+static int
+do_test (void)
+{
+  char buf[100];
+  FILE *fp;
+  int result = 0;
+
+  fp = fdopen (fd, "w");
+  if (fp == NULL)
+    {
+      puts ("cannot create file");
+      exit (1);
+    }
+
+  if (fputs ("one\n", fp) == EOF || fputs ("two\n", fp) == EOF)
+    {
+      puts ("cannot create filec content");
+      exit (1);
+    }
+
+  fclose (fp);
+
+  fp = fopen (fname, "a+");
+  if (fp == NULL)
+    {
+      puts ("cannot fopen a+");
+      exit (1);
+    }
+
+  if (fgets (buf, sizeof (buf), fp) == NULL)
+    {
+      puts ("cannot read after fopen a+");
+      exit (1);
+    }
+
+  if (strcmp (buf, "one\n") != 0)
+    {
+      puts ("read after fopen a+ produced wrong result");
+      result = 1;
+    }
+
+  fclose (fp);
+
+  fd = open (fname, O_RDWR);
+  if (fd == -1)
+    {
+      puts ("open failed");
+      exit (1);
+    }
+
+  fp = fdopen (fd, "a+");
+  if (fp == NULL)
+    {
+      puts ("fopen after open failed");
+      exit (1);
+    }
+
+  if (fgets (buf, sizeof (buf), fp) == NULL)
+    {
+      puts ("cannot read after fdopen a+");
+      exit (1);
+    }
+
+  if (strcmp (buf, "one\n") != 0)
+    {
+      puts ("read after fdopen a+ produced wrong result");
+      result = 1;
+    }
+
+  fclose (fp);
+
+  return result;
+}