ntpd: and real handling for -N, show usage w/o options; trim text

function                                             old     new   delta
ntp_init                                             317     348     +31
bb_msg_you_must_be_root                                -      17     +17
xsocket                                               66      76     +10
changepath                                           195     194      -1
bb_msg_perm_denied_are_you_root                       35      34      -1
send_tree                                            355     353      -2
count_lines                                           74      72      -2
must_be_root                                          17       -     -17
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 2/4 up/down: 58/-23)             Total: 35 bytes
   text   data    bss    dec    hexfilename
 832873    441   7548 840862  cd49ebusybox_old
 832839    441   7548 840828  cd47cbusybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

3 files changed, 16 insertions, 8 deletions

diff --git a/networking/ntpd.c b/networking/ntpd.c
index 12e498d..e2c3506 100644
--- a/networking/ntpd.c
+++ b/networking/ntpd.c
@@ -7,7 +7,9 @@
  */
 #include "libbb.h"
 #include <netinet/ip.h> /* For IPTOS_LOWDELAY definition */
-
+#ifndef IPTOS_LOWDELAY
+# define IPTOS_LOWDELAY 0x10
+#endif
 #ifndef IP_PKTINFO
 # error "Sorry, your kernel has to support IP_PKTINFO"
 #endif
@@ -161,10 +163,11 @@ enum {
 	OPT_n = (1 << 0),
 	OPT_g = (1 << 1),
 	OPT_q = (1 << 2),
+	OPT_N = (1 << 3),
 	/* Insert new options above this line. */
 	/* Non-compat options: */
-	OPT_p = (1 << 3),
-	OPT_l = (1 << 4),
+	OPT_p = (1 << 4),
+	OPT_l = (1 << 5) * ENABLE_FEATURE_NTPD_SERVER,
 };
 
 
@@ -877,16 +880,18 @@ static NOINLINE void ntp_init(char **argv)
 	/* tzset(); - why? it's called automatically when needed, no? */
 
 	if (getuid())
-		bb_error_msg_and_die("need root privileges");
+		bb_error_msg_and_die(bb_msg_you_must_be_root);
 
 	peers = NULL;
 	opt_complementary = "dd:p::"; /* d: counter, p: list */
 	opts = getopt32(argv,
-			"ngq" /* compat */
+			"ngqN" /* compat */
 			"p:"IF_FEATURE_NTPD_SERVER("l") /* NOT compat */
 			"d" /* compat */
-			"46aAbLNx", /* compat, ignored */
+			"46aAbLx", /* compat, ignored */
 			&peers, &G.verbose);
+	if (!(opts & (OPT_p|OPT_l)))
+		bb_show_usage();
 #if ENABLE_FEATURE_NTPD_SERVER
 	G.listen_fd = -1;
 	if (opts & OPT_l) {
@@ -903,6 +908,9 @@ static NOINLINE void ntp_init(char **argv)
 		logmode = LOGMODE_NONE;
 		bb_daemonize(DAEMON_DEVNULL_STDIO);
 	}
+	/* I hesitate to set -20 prio. -15 should be high enough for timekeeping */
+	if (opts & OPT_N)
+		setpriority(PRIO_PROCESS, 0, -15);
 
 	/* Set some globals */
 	{
diff --git a/networking/tcpudp.c b/networking/tcpudp.c
index 25b3319..d0db33b 100644
--- a/networking/tcpudp.c
+++ b/networking/tcpudp.c
@@ -239,7 +239,7 @@ int tcpudpsvd_main(int argc UNUSED_PARAM, char **argv)
 	client = 0;
 	if ((getuid() == 0) && !(opts & OPT_u)) {
 		xfunc_exitcode = 100;
-		bb_error_msg_and_die("-U ssluser must be set when running as root");
+		bb_error_msg_and_die(bb_msg_you_must_be_root);
 	}
 	if (opts & OPT_u)
 		if (!uidgid_get(&sslugid, ssluser, 1)) {
diff --git a/networking/traceroute.c b/networking/traceroute.c
index e9f3cc6..110bdfa 100644
--- a/networking/traceroute.c
+++ b/networking/traceroute.c
@@ -835,7 +835,7 @@ common_traceroute_main(int op, char **argv)
 		 * probe (e.g., on a multi-homed host).
 		 */
 		if (getuid() != 0)
-			bb_error_msg_and_die("you must be root to use -s");
+			bb_error_msg_and_die(bb_msg_you_must_be_root);
 	}
 	if (op & OPT_WAITTIME)
 		waittime = xatou_range(waittime_str, 1, 24 * 60 * 60);