Add missing <unistd.h> include for getpid

diff --git a/tests/src/libsystem.c b/tests/src/libsystem.c
index 577e47f59aab66bfc589cd3e9c7d9e8c6c4e3a13..d853e30f0f187b5ebef2f16c999b84e5ef00ebed 100644 (file)
--- a/tests/src/libsystem.c
+++ b/tests/src/libsystem.c
@@ -4,6 +4,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <pwd.h>
+#include <unistd.h>
 #include <grp.h>
 #include <security/pam_appl.h>
 #include <fcntl.h>