From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Fri, 29 Dec 2017 08:11:42 +0000 (+0900)
Subject: nsflags: add namespace_flag_to_string_many_with_check()
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=f2e564a3e0a57ff225102e8eb9b5f936e0c9f160;p=elogind.git

nsflags: add namespace_flag_to_string_many_with_check()

The function will be used in later commits.
---

diff --git a/src/shared/nsflags.h b/src/shared/nsflags.h
index 5aff9245b..f374a4883 100644
--- a/src/shared/nsflags.h
+++ b/src/shared/nsflags.h
@@ -44,6 +44,13 @@ int namespace_flag_from_string_many(const char *name, unsigned long *ret);
 #endif // 0
 int namespace_flag_to_string_many(unsigned long flags, char **ret);
 
+static inline int namespace_flag_to_string_many_with_check(unsigned long n, char **s) {
+        if ((n & NAMESPACE_FLAGS_ALL) != n)
+                return -EINVAL;
+
+        return namespace_flag_to_string_many(n, s);
+}
+
 struct namespace_flag_map {
         unsigned long flag;
         const char *name;