1 files changed, 95 insertions, 0 deletions
diff --git a/vms_exit.c b/vms_exit.c
new file mode 100644
index 0000000..050550a
--- /dev/null
+++ b/vms_exit.c
@@ -0,0 +1,95 @@
+/* vms_exit.c
+ *
+ * Wrapper for the VMS exit() command to tranlate UNIX codes to be
+ * encoded for POSIX, but also have VMS severity levels.
+ * The posix_exit() variant only sets a severity level for status code 1.
+ *
+ * Author: John E. Malmberg
+ */
+
+/* Copyright (C) 2014 Free Software Foundation, Inc.
+
+GNU Make 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 of the License, or (at your option) any later
+version.
+
+GNU Make 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, see <http://www.gnu.org/licenses/>.  */
+
+
+/* Per copyright assignment agreement with the Free Software Foundation
+   this software may be available under under other license agreements
+   and copyrights. */
+
+#include <makeint.h>
+
+#include <stsdef.h>
+void
+decc$exit (int status);
+#ifndef C_FACILITY_NO
+# define C_FACILITY_NO 0x350000
+#endif
+
+/* Lowest legal non-success VMS exit code is 8 */
+/* GNU make only defines codes 0, 1, 2 */
+/* So assume any exit code > 8 is a VMS exit code */
+
+#ifndef MAX_EXPECTED_EXIT_CODE
+# define MAX_EXPECTED_EXIT_CODE 7
+#endif
+
+/* Build a Posix Exit with VMS severity */
+void
+vms_exit (int status)
+{
+  int vms_status;
+  /* Fake the __posix_exit with severity added */
+  /* Undocumented correct way to do this. */
+  vms_status = 0;
+
+  /* The default DECC definition is not compatible with doing a POSIX_EXIT */
+  /* So fix it. */
+  if (status == EXIT_FAILURE)
+    status = MAKE_FAILURE;
+
+  /* Trivial case exit success */
+  if (status == 0)
+    decc$exit (STS$K_SUCCESS);
+
+  /* Is this a VMS status then just take it */
+  if (status > MAX_EXPECTED_EXIT_CODE)
+    {
+      /* Make sure that the message inhibit is set since message has */
+      /* already been displayed. */
+      vms_status = status | STS$M_INHIB_MSG;
+      decc$exit (vms_status);
+    }
+
+  /* Unix status codes are limited to 1 byte, so anything larger */
+  /* is a probably a VMS exit code and needs to be passed through */
+  /* A lower value can be set for a macro. */
+  /* Status 0 is always passed through as it is converted to SS$_NORMAL */
+  /* Always set the message inhibit bit */
+  vms_status = C_FACILITY_NO | 0xA000 | STS$M_INHIB_MSG;
+  vms_status |= (status << 3);
+
+  /* STS$K_ERROR is for status that stops makefile that a simple */
+  /* Rerun of the makefile will not fix. */
+
+  if (status == MAKE_FAILURE)
+    vms_status |= STS$K_ERROR;
+  else if (status == MAKE_TROUBLE)
+    {
+      /* Make trouble is for when make was told to do nothing and */
+      /* found that a target was not up to date.  Since a second */
+      /* of make will produce the same condition, this is of */
+      /* Error severity */
+      vms_status |= STS$K_ERROR;
+    }
+  decc$exit (vms_status);
+}