1 files changed, 57 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/system.c b/libgfortran/intrinsics/system.c
new file mode 100644
index 0000000000..8fcb7e7471
--- /dev/null
+++ b/libgfortran/intrinsics/system.c
@@ -0,0 +1,57 @@
+/* Implementation of the SYSTEM intrinsic.
+   Copyright (C) 2004-2017 Free Software Foundation, Inc.
+   Contributed by Tobias Schlüter.
+
+This file is part of the GNU Fortran runtime library (libgfortran).
+
+Libgfortran 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 3, or (at your option) any later
+version.
+
+Libgfortran 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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include "libgfortran.h"
+
+extern void system_sub (const char *fcmd, GFC_INTEGER_4 * status,
+			gfc_charlen_type cmd_len);
+iexport_proto(system_sub);
+
+void
+system_sub (const char *fcmd, GFC_INTEGER_4 *status, gfc_charlen_type cmd_len)
+{
+  char *cmd = fc_strdup (fcmd, cmd_len);
+  int stat;
+
+  /* Flush all I/O units before executing the command.  */
+  flush_all_units();
+
+  stat = system (cmd);
+  free (cmd);
+  if (status)
+    *status = stat;
+}
+iexport(system_sub);
+
+extern GFC_INTEGER_4 PREFIX(system) (const char *, gfc_charlen_type);
+export_proto_np(PREFIX(system));
+
+GFC_INTEGER_4
+PREFIX(system) (const char *fcmd, gfc_charlen_type cmd_len)
+{
+  GFC_INTEGER_4 stat;
+  system_sub (fcmd, &stat, cmd_len);
+  return stat;
+}