X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;ds=sidebyside;f=liblttng-ust-ctl%2Fustctl.c;h=ea5ab9dc4ed3ce29cd3dad50b1cc16c4bc32167a;hb=e7bf49685071a4d78dca463c371c02901af90d77;hp=39c8baa4b4fea4b586a9323290b6287acd4e86f4;hpb=fb31eb73d8a4a6d9784ed5c335b7fa3b9684108c;p=lttng-ust.git

diff --git a/liblttng-ust-ctl/ustctl.c b/liblttng-ust-ctl/ustctl.c
index 39c8baa4..ea5ab9dc 100644
--- a/liblttng-ust-ctl/ustctl.c
+++ b/liblttng-ust-ctl/ustctl.c
@@ -21,6 +21,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <sys/mman.h>
+#include <unistd.h>
 
 #include <lttng/ust-config.h>
 #include <lttng/ust-ctl.h>
@@ -1853,7 +1854,8 @@ int ustctl_recv_reg_msg(int sock,
 	*uint64_t_alignment = reg_msg.uint64_t_alignment;
 	*long_alignment = reg_msg.long_alignment;
 	memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN);
-	if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) {
+	if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE ||
+			reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) {
 		return -LTTNG_UST_ERR_UNSUP_MAJOR;
 	}