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-rw-r--r--src/shared/nsflags.h49
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diff --git a/src/shared/nsflags.h b/src/shared/nsflags.h
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+++ b/src/shared/nsflags.h
@@ -0,0 +1,49 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2016 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sched.h>
+
+#include "missing.h"
+
+/* The combination of all namespace flags defined by the kernel. The right type for this isn't clear. setns() and
+ * unshare() expect these flags to be passed as (signed) "int", while clone() wants them as "unsigned long". The latter
+ * is definitely more appropriate for a flags parameter, and also the larger type of the two, hence let's stick to that
+ * here. */
+#define NAMESPACE_FLAGS_ALL \
+ ((unsigned long) (CLONE_NEWCGROUP| \
+ CLONE_NEWIPC| \
+ CLONE_NEWNET| \
+ CLONE_NEWNS| \
+ CLONE_NEWPID| \
+ CLONE_NEWUSER| \
+ CLONE_NEWUTS))
+
+const char* namespace_flag_to_string(unsigned long flag);
+unsigned long namespace_flag_from_string(const char *name);
+int namespace_flag_from_string_many(const char *name, unsigned long *ret);
+int namespace_flag_to_string_many(unsigned long flags, char **ret);
+
+struct namespace_flag_map {
+ unsigned long flag;
+ const char *name;
+};
+
+extern const struct namespace_flag_map namespace_flag_map[];