Use _PATH_DEVNULL instead of direct hardcoding.

MFC after:	2 weeks

diff --git a/usr.bin/systat/main.c b/usr.bin/systat/main.c
index 0724d9aaa472d9ab8d42c19d2e6e9e371f304959..5e509ca08b66c8e1f3ea7afbd431e204a25d44f9 100644 (file)
--- a/usr.bin/systat/main.c
+++ b/usr.bin/systat/main.c
@@ -178,7 +178,7 @@ main(int argc, char **argv)
                 * devices. We can now use sysctl only.
                 */
                use_kvm = 0;
-               kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null",
+               kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
                    O_RDONLY, errbuf);
                if (kd == NULL) {
                        error("%s", errbuf);