From 74f4638877607afc7d9320f99c8b3fe23e59c382 Mon Sep 17 00:00:00 2001
From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Thu, 11 Feb 2021 14:40:17 +0100
Subject: [PATCH] string_utils: add fdstr()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
 src/lxc/string_utils.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/lxc/string_utils.h b/src/lxc/string_utils.h
index c98429c09..f12879254 100644
--- a/src/lxc/string_utils.h
+++ b/src/lxc/string_utils.h
@@ -161,4 +161,15 @@ static inline const char *proc_self_fd(int fd)
 	return buf;
 }
 
+static inline const char *fdstr(int fd)
+{
+	static const char *fdstr_invalid = "-EBADF";
+	static char buf[INTTYPE_TO_STRLEN(int)];
+
+	if (strnprintf(buf, sizeof(buf), "%d", fd) < 0)
+		return fdstr_invalid;
+
+	return buf;
+}
+
 #endif /* __LXC_STRING_UTILS_H */
-- 
2.47.2