From 245328c93635714bf6c539b97c2ece5e5df502ab Mon Sep 17 00:00:00 2001
From: Micah Morton <mortonm@chromium.org>
Date: Mon, 23 Apr 2018 06:37:24 -0700
Subject: [PATCH] Allow setting runtime data dir through preprocessor macro.

ppp is hardcoded to use /var/run for runtime data directory. Enable
specification of this directory through a preprocessor macro that can be
set by compiler args.
---
 pppd/main.c                   |  8 ++++++--
 pppd/pathnames.h              |  8 ++++++--
 pppd/plugins/radius/radattr.c | 14 +++++++++-----
 3 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/pppd/main.c b/pppd/main.c
index 6d50d1b..d91b3ea 100644
--- a/pppd/main.c
+++ b/pppd/main.c
@@ -121,6 +121,10 @@
 #include "atcp.h"
 #endif
 
+#ifndef RUNTIME_DATA_DIR
+#define RUNTIME_DATA_DIR "/var/run/"
+#endif
+
 static const char rcsid[] = RCSID;
 
 /* interface vars */
@@ -811,7 +815,7 @@ create_pidfile(pid)
     FILE *pidfile;
 
     slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid",
-	     _PATH_VARRUN, ifname);
+	     RUNTIME_DATA_DIR, ifname);
     if ((pidfile = fopen(pidfilename, "w")) != NULL) {
 	fprintf(pidfile, "%d\n", pid);
 	(void) fclose(pidfile);
@@ -831,7 +835,7 @@ create_linkpidfile(pid)
 	return;
     script_setenv("LINKNAME", linkname, 1);
     slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid",
-	     _PATH_VARRUN, linkname);
+	     RUNTIME_DATA_DIR, linkname);
     if ((pidfile = fopen(linkpidfile, "w")) != NULL) {
 	fprintf(pidfile, "%d\n", pid);
 	if (ifname[0])
diff --git a/pppd/pathnames.h b/pppd/pathnames.h
index a33f046..69868bb 100644
--- a/pppd/pathnames.h
+++ b/pppd/pathnames.h
@@ -45,11 +45,15 @@
 #define _PATH_IPXDOWN	 _ROOT_PATH "/etc/ppp/ipx-down"
 #endif /* IPX_CHANGE */
 
+#ifndef RUNTIME_DATA_DIR
+#define RUNTIME_DATA_DIR "/var/run/"
+#endif
+
 #ifdef __STDC__
-#define _PATH_PPPDB	_ROOT_PATH _PATH_VARRUN "pppd2.tdb"
+#define _PATH_PPPDB	_ROOT_PATH RUNTIME_DATA_DIR "pppd2.tdb"
 #else /* __STDC__ */
 #ifdef HAVE_PATHS_H
-#define _PATH_PPPDB	"/var/run/pppd2.tdb"
+#define _PATH_PPPDB	RUNTIME_DATA_DIR "pppd2.tdb"
 #else
 #define _PATH_PPPDB	"/etc/ppp/pppd2.tdb"
 #endif
diff --git a/pppd/plugins/radius/radattr.c b/pppd/plugins/radius/radattr.c
index 1fe7daa..ee2c738 100644
--- a/pppd/plugins/radius/radattr.c
+++ b/pppd/plugins/radius/radattr.c
@@ -4,7 +4,7 @@
 *
 * A plugin which is stacked on top of radius.so.  This plugin writes
 * all RADIUS attributes from the server's authentication confirmation
-* into /var/run/radattr.pppN.  These attributes are available for
+* into /var/run/ipsec/radattr.pppN.  These attributes are available for
 * consumption by /etc/ppp/ip-{up,down} scripts.
 *
 * Copyright (C) 2002 Roaring Penguin Software Inc.
@@ -21,6 +21,10 @@ static char const RCSID[] =
 #include "radiusclient.h"
 #include <stdio.h>
 
+#ifndef RUNTIME_DATA_DIR
+#define RUNTIME_DATA_DIR "/var/run/"
+#endif
+
 extern void (*radius_attributes_hook)(VALUE_PAIR *);
 static void print_attributes(VALUE_PAIR *);
 static void cleanup(void *opaque, int arg);
@@ -60,7 +64,7 @@ plugin_init(void)
 * %RETURNS:
 *  Nothing
 * %DESCRIPTION:
-*  Prints the attribute pairs to /var/run/radattr.pppN.  Each line of the
+*  Prints the attribute pairs to /var/run/ipsec/radattr.pppN.  Each line of the
 *  file contains "name value" pairs.
 ***********************************************************************/
 static void
@@ -72,7 +76,7 @@ print_attributes(VALUE_PAIR *vp)
     char value[2048];
     int cnt = 0;
 
-    slprintf(fname, sizeof(fname), "/var/run/radattr.%s", ifname);
+    slprintf(fname, sizeof(fname), RUNTIME_DATA_DIR "radattr.%s", ifname);
     fp = fopen(fname, "w");
     if (!fp) {
 	warn("radattr plugin: Could not open %s for writing: %m", fname);
@@ -98,14 +102,14 @@ print_attributes(VALUE_PAIR *vp)
 * %RETURNS:
 *  Nothing
 * %DESCRIPTION:
-*  Deletes /var/run/radattr.pppN
+*  Deletes /var/run/ipsec/radattr.pppN
 ***********************************************************************/
 static void
 cleanup(void *opaque, int arg)
 {
     char fname[512];
 
-    slprintf(fname, sizeof(fname), "/var/run/radattr.%s", ifname);
+    slprintf(fname, sizeof(fname), RUNTIME_DATA_DIR "radattr.%s", ifname);
     (void) remove(fname);
     dbglog("RADATTR plugin removed file %s.", fname);
 }
-- 
2.13.5