[PATCH kvmtool v2 5/7] util: Set exit status to errno in die_perror()

[Alexandru Elisei]

Exit with a return code equal to errno in die_perror() to make it easier
for the user to get the error code directly.

As per man 3 perror, errno is undefined after a successful library call, so
save it when entering die_perror().

Signed-off-by: Alexandru Elisei <alexandru.elisei at arm.com>
---
 util/util.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/util/util.c b/util/util.c
index bab4bb394111..fc732200f2dc 100644
--- a/util/util.c
+++ b/util/util.c
@@ -100,8 +100,10 @@ void __pr_debug(const char *debug, ...)
 
 void die_perror(const char *s)
 {
+	int e = errno;
+
 	perror(s);
-	exit(1);
+	exit(e);
 }
 
 void *mmap_hugetlbfs(struct kvm *kvm, const char *htlbfs_path, u64 size)
-- 
2.54.0