From e49b56bfca88ba96da91bc14f9dfc149741da965 Mon Sep 17 00:00:00 2001 From: dd Date: Wed, 2 Oct 2002 03:24:27 +0000 Subject: Add an -o option to exit after receiving one reply. This can be used to test whether a link is live. PR: 38573 Submitted by: David Taylor Obtained from: NetBSD --- sbin/ping/ping.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'sbin/ping/ping.c') diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c index ca7a69b..99a4c0e 100644 --- a/sbin/ping/ping.c +++ b/sbin/ping/ping.c @@ -137,6 +137,7 @@ int options; #endif /*IPSEC*/ #define F_TTL 0x8000 #define F_MISSED 0x10000 +#define F_ONCE 0x20000 /* * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum @@ -242,7 +243,7 @@ main(argc, argv) datap = &outpack[MINICMPLEN + PHDR_LEN]; while ((ch = getopt(argc, argv, - "AI:LQRS:T:c:adfi:l:m:np:qrs:t:v" + "AI:LQRS:T:c:adfi:l:m:nop:qrs:t:v" #ifdef IPSEC #ifdef IPSEC_POLICY_IPSEC "P:" @@ -320,6 +321,9 @@ main(argc, argv) case 'n': options |= F_NUMERIC; break; + case 'o': + options |= F_ONCE; + break; case 'p': /* fill buffer with user pattern */ options |= F_PINGFILLED; fill((char *)datap, optarg); @@ -696,7 +700,8 @@ main(argc, argv) t = &now; } pr_pack((char *)packet, cc, &from, t); - if (npackets && nreceived >= npackets) + if (options & F_ONCE && nreceived || + npackets && nreceived >= npackets) break; } if (n == 0 || options & F_FLOOD) { @@ -1441,7 +1446,7 @@ static void usage() { (void)fprintf(stderr, "%s\n%s\n%s\n", -"usage: ping [-AQRadfnqrv] [-c count] [-i wait] [-l preload] [-m ttl]", +"usage: ping [-AQRadfnoqrv] [-c count] [-i wait] [-l preload] [-m ttl]", " [-p pattern] " #ifdef IPSEC #ifdef IPSEC_POLICY_IPSEC -- cgit v1.1