1 files changed, 67 insertions, 0 deletions
diff --git a/src/shared/nsflags.c b/src/shared/nsflags.c
new file mode 100644
index 0000000..d4cee06
--- /dev/null
+++ b/src/shared/nsflags.c
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+
+#include "alloc-util.h"
+#include "extract-word.h"
+#include "namespace-util.h"
+#include "nsflags.h"
+#include "string-util.h"
+
+int namespace_flags_from_string(const char *name, unsigned long *ret) {
+        unsigned long flags = 0;
+        int r;
+
+        assert_se(ret);
+
+        for (;;) {
+                _cleanup_free_ char *word = NULL;
+                unsigned long f = 0;
+                unsigned i;
+
+                r = extract_first_word(&name, &word, NULL, 0);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        break;
+
+                for (i = 0; namespace_info[i].proc_name; i++)
+                        if (streq(word, namespace_info[i].proc_name)) {
+                                 f = namespace_info[i].clone_flag;
+                                 break;
+                        }
+
+                if (f == 0)
+                        return -EINVAL;
+
+                flags |= f;
+        }
+
+        *ret = flags;
+        return 0;
+}
+
+int namespace_flags_to_string(unsigned long flags, char **ret) {
+        _cleanup_free_ char *s = NULL;
+        unsigned i;
+
+        for (i = 0; namespace_info[i].proc_name; i++) {
+                if ((flags & namespace_info[i].clone_flag) != namespace_info[i].clone_flag)
+                        continue;
+
+                if (!strextend_with_separator(&s, " ", namespace_info[i].proc_name))
+                        return -ENOMEM;
+        }
+
+        *ret = TAKE_PTR(s);
+
+        return 0;
+}
+
+const char *namespace_single_flag_to_string(unsigned long flag) {
+        for (unsigned i = 0; namespace_info[i].proc_name; i++)
+                if (namespace_info[i].clone_flag == flag)
+                        return namespace_info[i].proc_name;
+
+        return NULL;
+}