diff -urpa postgresql-10.5.orig/src/bin/pg_upgrade/option.c postgresql-10.5/src/bin/pg_upgrade/option.c
--- postgresql-10.5.orig/src/bin/pg_upgrade/option.c 2018-08-22 19:57:55.237373015 +0000
+++ postgresql-10.5/src/bin/pg_upgrade/option.c 2018-08-22 19:59:10.944372163 +0000
-@@ -460,6 +460,11 @@ get_sock_dir(ClusterInfo *cluster, bool
- cluster->sockdir = pg_malloc(MAXPGPATH);
- if (!getcwd(cluster->sockdir, MAXPGPATH))
- pg_fatal("could not determine current directory\n");
+@@ -474,8 +474,14 @@
+ */
+ if (GET_MAJOR_VERSION(cluster->major_version) >= 901)
+ {
+- if (!live_check)
++ if (!live_check) {
+ cluster->sockdir = user_opts.socketdir;
+#ifndef UNIX_PATH_MAX
+#define UNIX_PATH_MAX 108
+#endif
+ if (strlen(cluster->sockdir) >= UNIX_PATH_MAX - sizeof(".s.PGSQL.50432"))
+ strcpy(cluster->sockdir, "/tmp"); /* fall back to tmp */
- }
++ }
else
{
+ /*
diff -urpa postgresql-10.5.orig/src/include/pg_config_manual.h postgresql-10.5/src/include/pg_config_manual.h
--- postgresql-10.5.orig/src/include/pg_config_manual.h 2018-08-22 19:57:55.095373017 +0000
+++ postgresql-10.5/src/include/pg_config_manual.h 2018-08-22 19:58:30.664372616 +0000