re PR fortran/44931 (For INPUT_UNIT, INQUIRE NAME= should not return "stdin")

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.

From-SVN: r162667

4 files changed, 54 insertions, 23 deletions

diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 9252a90..2558155 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 f908cde..1189c54 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 3a795ae..eea03ba 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 3229d50..dc433d7 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)