1 files changed, 36 insertions, 0 deletions
diff --git a/sys/etc/prenvfree.x b/sys/etc/prenvfree.x
new file mode 100644
index 00000000..90908789
--- /dev/null
+++ b/sys/etc/prenvfree.x
@@ -0,0 +1,36 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# PRENVFREE -- Free any recently defined or redefined environment variables,
+# updating the values of any redefined variables uncovered by the free
+# operation in the specified connected subprocesses.
+
+int procedure prenvfree (pid, marker)
+
+int	pid		# pid of process to be updated, or 0 for all subprocs
+int	marker		# stack pointer returned by ENVMARK
+
+int	ev_pid
+common	/prvcom/ ev_pid
+int	locpr(), envfree()
+extern	prv_reset()
+
+begin
+	ev_pid = pid
+	return (envfree (marker, locpr (prv_reset)))
+end
+
+
+# PRV_RESET -- Reset the value of an environment variable in the specified
+# connected subprocesses.
+
+procedure prv_reset (name, value)
+
+char	name[ARB]		# name of variable to be reset
+char	value[ARB]		# new value
+
+int	ev_pid
+common	/prvcom/ ev_pid
+
+begin
+	call prenvset (ev_pid, name, value)
+end