Initial commit

1 files changed, 54 insertions, 0 deletions

diff --git a/sys/libc/cenvmark.c b/sys/libc/cenvmark.c
new file mode 100644
index 00000000..14963844
--- /dev/null
+++ b/sys/libc/cenvmark.c
@@ -0,0 +1,54 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+*/
+
+#define import_spp
+#define	import_libc
+#define	import_xnames
+#include <iraf.h>
+
+
+/* ENVMARK -- Mark the position of the "stack pointer" of the environment
+** list.  A subsequent call to ENVFREE will unset all set environment
+** operations since the corresponding mark.
+*/
+void
+c_envmark (
+  XINT	*envp			/* storage for saved stack pointer	*/
+)
+{
+	ENVMARK (envp);
+}
+
+
+/* ENVFREE -- Free or unset all environment variables set since the matching
+** call to ENVMARK.  The number of redefined variables uncovered by the free
+** operation is returned as the function value.
+*/
+int
+c_envfree (
+  int	envp,			/* marker returned by envmark		*/
+  int	userfcn			/* epa of user function for redefs	*/
+)
+{
+	XINT  x_envp = envp;
+
+	return (ENVFREE (&x_envp, (XINT *)&userfcn));
+}
+
+
+/* PRENVFREE -- Free or unset all environment variables set since the matching
+** call to ENVMARK.  The number of redefined variables uncovered by the free
+** operation is returned as the function value.  This call is equivalent to
+** envfree except that it also updates the values of any uncovered redefinitions
+** in the specified connected subprocesses.
+*/
+int
+c_prenvfree (
+  int	pid,			/* process pid, or 0 for all subprocs	*/
+  int	envp			/* marker returned by envmark		*/
+)
+{
+	XINT  x_pid = pid,  x_envp = envp;
+
+	return (PRENVFREE (&x_pid, &x_envp));
+}