diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 9252a90f46d..25581552e5e 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,14 @@
+2010-07-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libfortran/44931
+	* io/inquire.c (inquire_via_unit): Use ttyname to return actual device
+	file name for stdin, stdout, and stderr.  If ttyname does not succeed
+	fall back to default names for these units. Include string.h to allow
+	using strlen function.
+	* unix.c: Remove typedef of unix_stream structure, move to unix.h.
+	* unix.h: Add typedef of unix_stream structure so that it is
+	accessible to inquire.c.
+
 2010-07-19  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR libfortran/44953
diff --git a/libgfortran/io/inquire.c b/libgfortran/io/inquire.c
index f908cde0ccf..1189c544b35 100644
--- a/libgfortran/io/inquire.c
+++ b/libgfortran/io/inquire.c
@@ -26,6 +26,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 /* Implement the non-IOLENGTH variant of the INQUIRY statement */
 
+#include <string.h>
 #include "io.h"
 #include "unix.h"
 
@@ -66,7 +67,25 @@ inquire_via_unit (st_parameter_inquire *iqp, gfc_unit * u)
 
   if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0
       && u != NULL && u->flags.status != STATUS_SCRATCH)
-    fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
+    {
+#ifdef HAVE_TTYNAME
+      if (u->unit_number == options.stdin_unit
+	  || u->unit_number == options.stdout_unit
+	  || u->unit_number == options.stderr_unit)
+	{
+	  char * tmp = ttyname (((unix_stream *) u->s)->fd);
+	  if (tmp != NULL)
+	    {
+	      int tmplen = strlen (tmp);
+	      fstrcpy (iqp->name, iqp->name_len, tmp, tmplen);
+	    }
+	  else /* If ttyname does not work, go with the default.  */
+	    fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
+	}
+      else
+#endif
+	fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
+    }
 
   if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
     {
diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c
index 3a795aef536..eea03ba7f81 100644
--- a/libgfortran/io/unix.c
+++ b/libgfortran/io/unix.c
@@ -135,28 +135,6 @@ typedef struct stat gfstat_t;
 
 static const int BUFFER_SIZE = 8192;
 
-typedef struct
-{
-  stream st;
-
-  gfc_offset buffer_offset;	/* File offset of the start of the buffer */
-  gfc_offset physical_offset;	/* Current physical file offset */
-  gfc_offset logical_offset;	/* Current logical file offset */
-  gfc_offset file_length;	/* Length of the file, -1 if not seekable. */
-
-  char *buffer;                 /* Pointer to the buffer.  */
-  int fd;                       /* The POSIX file descriptor.  */
-
-  int active;			/* Length of valid bytes in the buffer */
-
-  int prot;
-  int ndirty;			/* Dirty bytes starting at buffer_offset */
-
-  int special_file;		/* =1 if the fd refers to a special file */
-}
-unix_stream;
-
-
 /* fix_fd()-- Given a file descriptor, make sure it is not one of the
  * standard descriptors, returning a non-standard descriptor.  If the
  * user specifies that system errors should go to standard output,
diff --git a/libgfortran/io/unix.h b/libgfortran/io/unix.h
index 3229d502547..dc433d75a8a 100644
--- a/libgfortran/io/unix.h
+++ b/libgfortran/io/unix.h
@@ -41,6 +41,29 @@ struct stream
   int (*close) (struct stream *);
 };
 
+
+typedef struct
+{
+  stream st;
+
+  gfc_offset buffer_offset;	/* File offset of the start of the buffer */
+  gfc_offset physical_offset;	/* Current physical file offset */
+  gfc_offset logical_offset;	/* Current logical file offset */
+  gfc_offset file_length;	/* Length of the file, -1 if not seekable. */
+
+  char *buffer;                 /* Pointer to the buffer.  */
+  int fd;                       /* The POSIX file descriptor.  */
+
+  int active;			/* Length of valid bytes in the buffer */
+
+  int prot;
+  int ndirty;			/* Dirty bytes starting at buffer_offset */
+
+  int special_file;		/* =1 if the fd refers to a special file */
+}
+unix_stream;
+
+
 /* Inline functions for doing file I/O given a stream.  */
 static inline ssize_t
 sread (stream * s, void * buf, ssize_t nbyte)