1 files changed, 99 insertions, 0 deletions
diff --git a/src/global/dot_lockfile_as.c b/src/global/dot_lockfile_as.c
new file mode 100644
index 0000000..7ee84d9
--- /dev/null
+++ b/src/global/dot_lockfile_as.c
@@ -0,0 +1,99 @@
+/*++
+/* NAME
+/*	dot_lockfile_as 3
+/* SUMMARY
+/*	dotlock file as user
+/* SYNOPSIS
+/*	#include <dot_lockfile_as.h>
+/*
+/*	int	dot_lockfile_as(path, why, euid, egid)
+/*	const char *path;
+/*	VSTRING *why;
+/*	uid_t	euid;
+/*	gid_t	egid;
+/*
+/*	void	dot_unlockfile_as(path, euid, egid)
+/*	const char *path;
+/*	uid_t	euid;
+/*	gid_t	egid;
+/* DESCRIPTION
+/*	dot_lockfile_as() and dot_unlockfile_as() are wrappers around
+/*	the dot_lockfile() and dot_unlockfile() routines. The routines
+/*	change privilege to the designated privilege, perform the
+/*	requested operation, and restore privileges.
+/* DIAGNOSTICS
+/*	Fatal error: no permission to change privilege level.
+/* SEE ALSO
+/*	dot_lockfile(3) dotlock file management
+/*	set_eugid(3) switch effective rights
+/* 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
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <unistd.h>
+
+/* Utility library. */
+
+#include "msg.h"
+#include "set_eugid.h"
+#include "dot_lockfile.h"
+#include "dot_lockfile_as.h"
+
+/* dot_lockfile_as - dotlock file as user */
+
+int     dot_lockfile_as(const char *path, VSTRING *why, uid_t euid, gid_t egid)
+{
+    uid_t   saved_euid = geteuid();
+    gid_t   saved_egid = getegid();
+    int     result;
+
+    /*
+     * Switch to the target user privileges.
+     */
+    set_eugid(euid, egid);
+
+    /*
+     * Lock that file.
+     */
+    result = dot_lockfile(path, why);
+
+    /*
+     * Restore saved privileges.
+     */
+    set_eugid(saved_euid, saved_egid);
+
+    return (result);
+}
+
+/* dot_unlockfile_as - dotlock file as user */
+
+void     dot_unlockfile_as(const char *path, uid_t euid, gid_t egid)
+{
+    uid_t   saved_euid = geteuid();
+    gid_t   saved_egid = getegid();
+
+    /*
+     * Switch to the target user privileges.
+     */
+    set_eugid(euid, egid);
+
+    /*
+     * Lock that file.
+     */
+    dot_unlockfile(path);
+
+    /*
+     * Restore saved privileges.
+     */
+    set_eugid(saved_euid, saved_egid);
+}