chage: Replace STRFCPY() by STRLCPY()

The variables are only being read as strings (char *), so data after the
'\0' can't be leaked.

Cc: Christian Göttsche <cgzones@googlemail.com>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Iker Pedrosa <ipedrosa@redhat.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

src/chage.c

@@ -33,6 +33,7 @@
 #include "pwio.h"
 #include "shadowio.h"
 #include "shadowlog.h"
+#include "strlcpy.h"
 #ifdef WITH_TCB
 #include "tcbfuncs.h"
 #endif
@@ -822,7 +823,7 @@ int main (int argc, char **argv)
 		fail_exit (E_NOPERM);
 	}
 
-	STRFCPY (user_name, pw->pw_name);
+	STRLCPY(user_name, pw->pw_name);
 #ifdef WITH_TCB
 	if (shadowtcb_set_user (pw->pw_name) == SHADOWTCB_FAILURE) {
 		fail_exit (E_NOPERM);