[PATCH] util: In ASSERT(), use "fprintf(stderr, ...)" rather than err(...)

[Laurent Vivier <lvivier@redhat.com>]

We use our own implementation of assert() because the glic implementation
uses syscalls that aren't in our seccomp filter, see 7a8ed9459dfe
("Make assertions actually useful"). And we replaced it by an err(),
followed by an abort() (that is also catched by seccomp).
We don't have a coredump or a backtrace but we have at least the
error message... only if logging is enabled.

As this kind of information is needed in any case, replace the "err()"
function by an "fprintf(stderr, ...)".

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
 util.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/util.h b/util.h
index b7541ce24e5a..b44b4bfdccd7 100644
--- a/util.h
+++ b/util.h
@@ -13,6 +13,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <signal.h>
+#include <stdio.h>
 #include <arpa/inet.h>
 
 #include "log.h"
@@ -67,8 +68,10 @@
 #define ASSERT(expr)							\
 	do {								\
 		if (!(expr)) {						\
-			err("ASSERTION FAILED in %s (%s:%d): %s",	\
-			    __func__, __FILE__, __LINE__, STRINGIFY(expr)); \
+			fprintf(stderr,					\
+				"ASSERTION FAILED in %s (%s:%d): %s\n",	\
+				__func__, __FILE__, __LINE__,		\
+				STRINGIFY(expr));			\
 			/* This may actually SIGSYS, due to seccomp,	\
 			 * but that will still get the job done		\
 			 */						\
-- 
@@ -13,6 +13,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <signal.h>
+#include <stdio.h>
 #include <arpa/inet.h>
 
 #include "log.h"
@@ -67,8 +68,10 @@
 #define ASSERT(expr)							\
 	do {								\
 		if (!(expr)) {						\
-			err("ASSERTION FAILED in %s (%s:%d): %s",	\
-			    __func__, __FILE__, __LINE__, STRINGIFY(expr)); \
+			fprintf(stderr,					\
+				"ASSERTION FAILED in %s (%s:%d): %s\n",	\
+				__func__, __FILE__, __LINE__,		\
+				STRINGIFY(expr));			\
 			/* This may actually SIGSYS, due to seccomp,	\
 			 * but that will still get the job done		\
 			 */						\
-- 
2.45.2