nspawn: export userns_mkdir() + userns_lchown() so that it can be used elsewhere in nspawn

src/nspawn/meson.build

@@ -26,6 +26,7 @@ libnspawn_core_sources = files('''
         nspawn-setuid.h
         nspawn-stub-pid1.c
         nspawn-stub-pid1.h
+        nspawn.h
 '''.split())
 
 nspawn_gperf_c = custom_target(

src/nspawn/nspawn.c

@@ -76,6 +76,7 @@
 #include "nspawn-settings.h"
 #include "nspawn-setuid.h"
 #include "nspawn-stub-pid1.h"
+#include "nspawn.h"
 #include "nulstr-util.h"
 #include "os-util.h"
 #include "pager.h"
@@ -1818,7 +1819,7 @@ static int verify_arguments(void) {
         return 0;
 }
 
-static int userns_lchown(const char *p, uid_t uid, gid_t gid) {
+int userns_lchown(const char *p, uid_t uid, gid_t gid) {
         assert(p);
 
         if (arg_userns_mode == USER_NAMESPACE_NO)
@@ -1847,7 +1848,7 @@ static int userns_lchown(const char *p, uid_t uid, gid_t gid) {
         return 0;
 }
 
-static int userns_mkdir(const char *root, const char *path, mode_t mode, uid_t uid, gid_t gid) {
+int userns_mkdir(const char *root, const char *path, mode_t mode, uid_t uid, gid_t gid) {
         const char *q;
         int r;
 

src/nspawn/nspawn.h

@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <sys/types.h>
+
+int userns_lchown(const char *p, uid_t uid, gid_t gid);
+int userns_mkdir(const char *root, const char *path, mode_t mode, uid_t uid, gid_t gid);