Initial revision

1 files changed, 85 insertions, 0 deletions

diff --git a/libps/tty.c b/libps/tty.c
new file mode 100644
index 00000000..be3c8ce6
--- /dev/null
+++ b/libps/tty.c
@@ -0,0 +1,85 @@
+/* The type ps_tty_t, for per-tty info.
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <hurd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "ps.h"
+#include "common.h"
+
+/* ---------------------------------------------------------------- */
+
+/* Create a ps_tty_t for the tty referred to by PORT, returning it in TTY.
+   If a memory allocation error occurs, ENOMEM is returned, otherwise 0.  */
+error_t
+ps_tty_create(file_t port, ps_tty_t *tty)
+{
+  *tty = NEW(struct ps_tty);
+  if (*tty == NULL)
+    return ENOMEM;
+
+  (*tty)->port = port;
+  (*tty)->name_state = PS_TTY_NAME_PENDING;
+
+  return 0;
+}
+
+/* Frees TTY and any resources it consumes.  */
+void
+ps_tty_free(ps_tty_t tty)
+{
+  mach_port_deallocate(mach_task_self(), tty->port);
+  if (tty->name_state == PS_TTY_NAME_OK && tty->name != NULL)
+    free(tty->name);
+  free(tty);
+}
+
+/* ---------------------------------------------------------------- */
+
+/* Returns the name of the tty, or NULL if it can't be figured out.  */
+char *ps_tty_name(ps_tty_t tty)
+{
+  if (tty->name_state == PS_TTY_NAME_PENDING)
+    {
+      string_t buf;
+
+      if (term_get_nodename(tty->port, &buf) != 0)
+	/* There is a terminal there, but we can't figure out its name.  */
+	tty->name_state = PS_TTY_NAME_ERROR;
+      else
+	{
+	  tty->name = NEWVEC(char, strlen(buf) + 1);
+	  if (tty->name == NULL)
+	    tty->name_state = PS_TTY_NAME_ERROR;
+	  else
+	    {
+	      strcpy(tty->name, buf);
+	      tty->name_state = PS_TTY_NAME_OK;
+	    }
+	}
+    }
+
+  if (tty->name_state == PS_TTY_NAME_OK)
+    return tty->name;
+  else
+    return NULL;
+}