From 03e3cd7d0224293624a17af7de6638cdd8659917 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 21 Apr 2017 21:04:03 +0100
Subject: [PATCH] ipif: "include" looks for the file in the directory where
 "include" appears

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 ipif/service-wrap | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/ipif/service-wrap b/ipif/service-wrap
index 678a867..8dca1c3 100755
--- a/ipif/service-wrap
+++ b/ipif/service-wrap
@@ -62,6 +62,7 @@ use strict;
 use POSIX;
 use Carp;
 use NetAddr::IP::Lite qw(:nofqdn :lower);
+use File::Basename;
 
 our $default_ifname = 'userv%d';
 
@@ -265,7 +266,9 @@ sub readconfig ($) {
 		    foreach @wrong;
 	    }
 	} elsif (m{^include\s+(\S+)$}) {
-	    readconfig $1;
+	    my $include = $1;
+	    $include =~ s{^(?!/)}{ dirname($cfgpath)."/" }e;
+	    readconfig $include;
 	} else {
 	    badcfg "unknown config directive or bad syntax";
 	}
@@ -274,10 +277,21 @@ sub readconfig ($) {
     close $cfgfh;
 }
 
-readconfig $v1config;
-
-if ($v0config && $v0config =~ m{^[^#]} && $v0config ne '/dev/null') {
+sub try_v0config() {
+    return unless $v0config;
+    return unless $v0config =~ m{^[^#]};
+    return if $v0config eq '/dev/null';
+    if ($v0config =~ m{^/}) {
+	if (!stat $v0config) {
+	    die "v0 config $v0config: $!\n" unless $!==ENOENT;
+	    return;
+	}
+    }
     print "trying v0 config $v0config...\n" if $protocol eq 'debug';
     execreal $v0config;
 }
+
+readconfig $v1config;
+try_v0config();
+
 die "permission denied\n";
-- 
2.30.2