1 files changed, 43 insertions, 0 deletions
diff --git a/src/util/set_eugid.h b/src/util/set_eugid.h
new file mode 100644
index 0000000..97a523e
--- /dev/null
+++ b/src/util/set_eugid.h
@@ -0,0 +1,43 @@
+#ifndef _SET_EUGID_H_INCLUDED_
+#define _SET_EUGID_H_INCLUDED_
+
+/*++
+/* NAME
+/*	set_eugid 3h
+/* SUMMARY
+/*	set effective user and group attributes
+/* SYNOPSIS
+/*	#include <set_eugid.h>
+/* DESCRIPTION
+/* .nf
+
+ /* External interface. */
+
+extern void set_eugid(uid_t, gid_t);
+
+ /*
+  * The following macros open and close a block that runs at a different
+  * privilege level. To make mistakes with stray curly braces less likely, we
+  * shape the macros below as the head and tail of a do-while loop.
+  */
+#define SAVE_AND_SET_EUGID(uid, gid) do { \
+	uid_t __set_eugid_uid = geteuid(); \
+	gid_t __set_eugid_gid = getegid(); \
+	set_eugid((uid), (gid));
+
+#define RESTORE_SAVED_EUGID() \
+	set_eugid(__set_eugid_uid, __set_eugid_gid); \
+    } while (0)
+
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*--*/
+
+#endif