From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Thu, 16 Aug 2018 11:01:54 +0000 (+0200)
Subject: log: add  CMD_SYSERROR()
X-Git-Tag: lxc-3.1.0~157^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb9623e70582bc734244acd91edee9d0b43fd6be;p=thirdparty%2Flxc.git

log: add  CMD_SYSERROR()

Add a thread-safe and uniform way to retrieve errno values in programs that are
shipped as part of LXC but are not expected to have access to the logging
system.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/log.h b/src/lxc/log.h
index 734fbe177..d75d87d43 100644
--- a/src/lxc/log.h
+++ b/src/lxc/log.h
@@ -429,6 +429,12 @@ ATTR_UNUSED static inline void LXC_##LEVEL(struct lxc_log_locinfo* locinfo,	\
 		ERROR("%s - " format, ptr, ##__VA_ARGS__); \
 	} while (0)
 
+#define CMD_SYSERROR(format, ...)                                    \
+	do {                                                         \
+		lxc_log_strerror_r;                                  \
+		fprintf(stderr, "%s - " format, ptr, ##__VA_ARGS__); \
+	} while (0)
+
 extern int lxc_log_fd;
 
 extern int lxc_log_syslog(int facility);