X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fshm.c;h=e955d12ba01191ff17d8020a301669653fab33df;hb=03e431550191df8609f921c7b4054c57ee4644d8;hp=7bb52d4ee2feeb513d59079bf11813f319d8c48a;hpb=7972d61991f4c7e25772502a3a7ebfe57a57645d;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/shm.c b/src/bin/lttng-sessiond/shm.c
index 7bb52d4ee..e955d12ba 100644
--- a/src/bin/lttng-sessiond/shm.c
+++ b/src/bin/lttng-sessiond/shm.c
@@ -17,6 +17,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <fcntl.h>
 #include <limits.h>
 #include <sys/mman.h>
@@ -132,12 +133,20 @@ error:
  */
 char *shm_ust_get_mmap(char *shm_path, int global)
 {
-	size_t mmap_size = sysconf(_SC_PAGE_SIZE);
+	size_t mmap_size;
 	int wait_shm_fd, ret;
 	char *wait_shm_mmap;
+	long sys_page_size;
 
 	assert(shm_path);
 
+	sys_page_size = sysconf(_SC_PAGE_SIZE);
+	if (sys_page_size < 0) {
+		PERROR("sysconf PAGE_SIZE");
+		goto error;
+	}
+	mmap_size = sys_page_size;
+
 	wait_shm_fd = get_wait_shm(shm_path, mmap_size, global);
 	if (wait_shm_fd < 0) {
 		goto error;