$OpenBSD: patch-sysdeps_openbsd_shm_limits_c,v 1.2 2018/04/27 10:20:03 robert Exp $

Index: sysdeps/openbsd/shm_limits.c
--- sysdeps/openbsd/shm_limits.c.orig
+++ sysdeps/openbsd/shm_limits.c
@@ -39,27 +39,32 @@ static unsigned long _glibtop_sysdeps_shm_limits =
  * since `shminfo' is already declared external in <sys/shm.h>. */
 static struct shminfo _shminfo;
 
-/* nlist structure for kernel access */
-static struct nlist nlst [] = {
-	{ "_shminfo" },
-	{ 0 }
-};
-
 /* Init function. */
 
 void
 _glibtop_init_shm_limits_p (glibtop *server)
 {
-	if (kvm_nlist (server->machine->kd, nlst) < 0) {
-		glibtop_warn_io_r (server, "kvm_nlist (shm_limits)");
+	int mib[3];
+	struct shm_sysctl_info *shmsi;
+	size_t len = sizeof(struct shminfo);
+
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_SYSVIPC_INFO;
+	mib[2] = KERN_SYSVIPC_SHM_INFO;
+
+	if ((shmsi = malloc(len)) == NULL) {
+		glibtop_warn_io_r (server, "malloc (shm_limits)");
 		return;
 	}
 
-	if (kvm_read (server->machine->kd, nlst [0].n_value,
-		      &_shminfo, sizeof (_shminfo)) != sizeof (_shminfo)) {
-		glibtop_warn_io_r (server, "kvm_read (shminfo)");
+	if (sysctl(mib, 3, shmsi, &len, NULL, 0) < 0) {
+		glibtop_warn_io_r (server, "sysctl (shm_limits)");
 		return;
 	}
+
+	_shminfo = shmsi->shminfo;
+
+	free (shmsi);
 
 	server->sysdeps.shm_limits = _glibtop_sysdeps_shm_limits;
 }
