Further modernize Hurd code by enforcing strict prototypes and no implicit function declarations.

Most of the changes land in one of these buckets:
* Removed unused declarations.
* Used (void) to represent no parameters instead of () which means an
  undeterminate number of parameters.
* Included missing header files whenever necessary (stdlib.h,
  sys/mman.h, etc)
* Typedefed function pointers to be able to fully declare the parameter
  types.
* Added declarations of library functions that are used elsewhere
  (example is libps/ps.h).
* Made functions static whenever they are only used in that file.
* Forwarded declarations of some methods that were made static.
Message-Id: <ZDD1o7/tVYeZew+G@jupiter.tail36e24.ts.net>

2 files changed, 3 insertions, 7 deletions

diff --git a/utils/rpcscan.c b/utils/rpcscan.c
index c5a8addc..dc7dec3c 100644
--- a/utils/rpcscan.c
+++ b/utils/rpcscan.c
@@ -83,7 +83,7 @@ send (mach_msg_id_t msgid)
   return Message.Reply.RetCode;
 }
 
-typedef error_t (*setup_function_t) ();
+typedef error_t (*setup_function_t) (void);
 setup_function_t setup_target;
 void *setup_argument;
 
diff --git a/utils/w.c b/utils/w.c
index ac5e36f8..d6977c4e 100644
--- a/utils/w.c
+++ b/utils/w.c
@@ -48,7 +48,7 @@
 
 extern char *canon_host (char *host);
 extern char *shared_domain (char *host1, char *host2);
-extern char *localhost ();
+extern char *localhost (void);
 
 const char *argp_program_version = STANDARD_HURD_VERSION (w);
 
@@ -218,7 +218,7 @@ w_get_user (struct proc_stat *ps)
   return hook->user;
 }
 const struct ps_getter w_user_getter =
-{"user", W_PSTAT_USER, (void (*)())w_get_user};
+{"user", W_PSTAT_USER, (void (*)(void))w_get_user};
 
 static void
 w_get_host (struct proc_stat *ps, char **host, unsigned *host_len)
@@ -230,10 +230,6 @@ w_get_host (struct proc_stat *ps, char **host, unsigned *host_len)
 const struct ps_getter w_host_getter =
 {"host", W_PSTAT_HOST, w_get_host};
 
-extern error_t ps_emit_past_time (), ps_emit_string (), ps_emit_minutes ();
-extern error_t ps_emit_user_name ();
-extern int ps_cmp_times (), ps_cmp_strings (), ps_cmp_unames ();
-extern int ps_nominal_string ();
 const struct ps_fmt_spec _w_specs[] =
 {
   {"User", 0, 8,   -1,0, &w_uname_getter,ps_emit_string, ps_cmp_strings},