check_icmp/check_dhcp: disable check, if we are root

As it is possible to use capabilities(7) on linux or solaris
privileges for example, it is not necessary in all cases to
have those binaries making use of setuid.

lib/utils_base.c

@@ -300,19 +300,6 @@ char *np_escaped_string (const char *string) {
 
 int np_check_if_root(void) { return (geteuid() == 0); }
 
-int np_warn_if_not_root(void) {
-	int status = np_check_if_root();
-	if(!status) {
-		printf(_("Warning: "));
-		printf(_("This plugin must be either run as root or setuid root.\n"));
-		printf(_("To run as root, you can use a tool like sudo.\n"));
-		printf(_("To set the setuid permissions, use the command:\n"));
-		/* XXX could we use something like progname? */
-		printf("\tchmod u+s yourpluginfile\n");
-	}
-	return status;
-}
-
 /*
  * Extract the value from key/value pairs, or return NULL. The value returned
  * can be free()ed.

lib/utils_base.h

@@ -75,9 +75,6 @@ void die (int, const char *, ...) __attribute__((noreturn,format(printf, 2, 3)))
 /* a simple check to see if we're running as root.  
  * returns zero on failure, nonzero on success */
 int np_check_if_root(void);
-/* and a helpful wrapper around that.  it returns the same status
- * code from the above function, in case it's helpful for testing */
-int np_warn_if_not_root(void);
 
 /* mp_suid() returns true if the real and effective uids differs, such as when
  * running a suid plugin */

plugins-root/check_dhcp.c

@@ -270,9 +270,6 @@ int main(int argc, char **argv){
 		usage4 (_("Could not parse arguments"));
 		}
 
-	/* this plugin almost certainly needs root permissions. */
-	np_warn_if_not_root();
-
 	/* create socket for DHCP communications */
 	dhcp_socket=create_dhcp_socket();
 

plugins-root/check_icmp.c

@@ -383,9 +383,6 @@ main(int argc, char **argv)
 	bindtextdomain (PACKAGE, LOCALEDIR);
 	textdomain (PACKAGE);
 
-	/* print a helpful error message if geteuid != 0 */
-	np_warn_if_not_root();
-
 	/* we only need to be setsuid when we get the sockets, so do
 	 * that before pointer magic (esp. on network data) */
 	icmp_sockerrno = udp_sockerrno = tcp_sockerrno = sockets = 0;