do not rely on obsolete feature

function prototype with unspecified argument is obsolete since c99.

additionally some of these function which don't take any argument were
being called with a `const char *` arg, which is UB.

fix both these issues by declararing ALL the components to accept a
`const char *`, and name the arg "unused" if it's meant to be ignored.

1 files changed, 1 insertions, 1 deletions

diff --git a/components/hostname.c b/components/hostname.c
index 8627a88..f04a913 100644
--- a/components/hostname.c
+++ b/components/hostname.c
@@ -6,7 +6,7 @@
 #include "../slstatus.h"
 
 const char *
-hostname(void)
+hostname(const char *unused)
 {
 	if (gethostname(buf, sizeof(buf)) < 0) {
 		warn("gethostbyname:");