Deal with _POSIX_SAVED_IDS when relinquishing privileges
use MAXHOSTNAMELEN

$OpenBSD: patch-unix_init_c,v 1.1.1.1 2001/07/13 02:27:16 fgsch Exp $
--- unix/init.c.orig	Sun Aug 20 15:30:24 1995
+++ unix/init.c	Thu Jul 12 21:56:10 2001
@@ -210,7 +210,8 @@ usysdep_initialize (puuconf,iflags)
   if (iuuconf == UUCONF_NOT_FOUND)
     {
 #if HAVE_GETHOSTNAME
-      char ab[256];
+#include <sys/param.h>
+      char ab[MAXHOSTNAMELEN];
 
       if (gethostname (ab, sizeof ab - 1) < 0)
 	ulog (LOG_FATAL, "gethostname: %s", strerror (errno));
@@ -272,8 +273,10 @@ usysdep_initialize (puuconf,iflags)
       && geteuid () == 0)
     {
       q = getpwnam (OWNER);
-      if (q != NULL)
+      if (q != NULL) {
+	seteuid (q->pw_uid);
 	setuid (q->pw_uid);
+      }
     }
 
   if ((iflags & INIT_GETCWD) != 0)
@@ -371,8 +374,10 @@ usysdep_exit (fsuccess)
 boolean fsysdep_other_config (z)
      const char *z;
 {
-  (void) setuid (getuid ());
+  (void) setegid (getgid ());
   (void) setgid (getgid ());
+  (void) seteuid (getuid ());
+  (void) setuid (getuid ());
   return TRUE;
 }