Mercurial > illumos > onarm
comparison usr/src/cmd/cmd-inet/usr.bin/rdate.c @ 0:c9caec207d52 b86
Initial porting based on b86
author | Koji Uno <koji.uno@sun.com> |
---|---|
date | Tue, 02 Jun 2009 18:56:50 +0900 |
parents | |
children | 1a15d5aaf794 |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:c9caec207d52 |
---|---|
1 /* | |
2 * CDDL HEADER START | |
3 * | |
4 * The contents of this file are subject to the terms of the | |
5 * Common Development and Distribution License, Version 1.0 only | |
6 * (the "License"). You may not use this file except in compliance | |
7 * with the License. | |
8 * | |
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
10 * or http://www.opensolaris.org/os/licensing. | |
11 * See the License for the specific language governing permissions | |
12 * and limitations under the License. | |
13 * | |
14 * When distributing Covered Code, include this CDDL HEADER in each | |
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
16 * If applicable, add the following below this CDDL HEADER, with the | |
17 * fields enclosed by brackets "[]" replaced with your own identifying | |
18 * information: Portions Copyright [yyyy] [name of copyright owner] | |
19 * | |
20 * CDDL HEADER END | |
21 */ | |
22 /* | |
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. | |
24 * Use is subject to license terms. | |
25 */ | |
26 | |
27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ | |
28 /* All Rights Reserved */ | |
29 | |
30 /* | |
31 * University Copyright- Copyright (c) 1982, 1986, 1988 | |
32 * The Regents of the University of California | |
33 * All Rights Reserved | |
34 * | |
35 * University Acknowledgment- Portions of this document are derived from | |
36 * software developed by the University of California, Berkeley, and its | |
37 * contributors. | |
38 */ | |
39 | |
40 #pragma ident "@(#)rdate.c 1.14 05/06/08 SMI" | |
41 | |
42 /* | |
43 * rdate - get date from remote machine | |
44 * | |
45 * sets time, obtaining value from host | |
46 * on the tcp/time socket. | |
47 */ | |
48 | |
49 #include <signal.h> | |
50 #include <sys/types.h> | |
51 #include <sys/time.h> | |
52 #include <sys/socket.h> | |
53 #include <netinet/tcp.h> | |
54 #include <strings.h> | |
55 #include <unistd.h> | |
56 #include <stdlib.h> | |
57 #include <netdb.h> | |
58 #include <stdio.h> | |
59 | |
60 /* | |
61 * The timeserver returns with time of day in seconds since | |
62 * Jan 1, 1900. We must subtract 86400(365*70 + 17) to get time | |
63 * since Jan 1, 1970, which is what get/settimeofday uses. | |
64 */ | |
65 | |
66 #define TOFFSET ((unsigned int)86400*(365*70 + 17)) | |
67 | |
68 /* | |
69 * Before setting the system time, the value returned by the | |
70 * timeserver is checked for plausibility. If the returned date | |
71 * is before the time this program was written it cannot be | |
72 * correct. | |
73 */ | |
74 | |
75 #define WRITTEN 440199955 /* 22:45:55 13/Dec/1983 */ | |
76 #define SECONDS_TO_MS 1000 | |
77 | |
78 static void timeout(int); | |
79 | |
80 int | |
81 main(int argc, char **argv) | |
82 { | |
83 int s, i; | |
84 uint32_t time; | |
85 struct timeval timestruct; | |
86 unsigned int connect_timeout; | |
87 /* number of seconds to wait for something to happen. */ | |
88 unsigned int rdate_timeout = 30; /* seconds */ | |
89 struct addrinfo hints; | |
90 struct addrinfo *res; | |
91 int rc; | |
92 | |
93 if (argc != 2) { | |
94 (void) fputs("usage: rdate host\n", stderr); | |
95 exit(EXIT_FAILURE); | |
96 } | |
97 | |
98 (void) memset(&hints, 0, sizeof (hints)); | |
99 hints.ai_protocol = IPPROTO_TCP; | |
100 res = NULL; | |
101 | |
102 /* | |
103 * getaddrinfo() may take a long time, because it can involve | |
104 * NIS, DNS, or LDAP lookups. Set an alarm timer. Note that this | |
105 * may still fail, depending on how SIGALRM is handled by the | |
106 * functions invoked by getaddrinfo(). | |
107 */ | |
108 | |
109 (void) signal(SIGALRM, timeout); | |
110 (void) alarm(rdate_timeout); | |
111 | |
112 /* | |
113 * Note: memory not freed due to short lifetime of program. | |
114 */ | |
115 | |
116 rc = getaddrinfo(argv[1], "time", &hints, &res); | |
117 (void) alarm(0); | |
118 | |
119 if (rc != 0) { | |
120 (void) fprintf(stderr, "Host name %s not found: %s\n", argv[1], | |
121 gai_strerror(rc)); | |
122 exit(EXIT_FAILURE); | |
123 } | |
124 | |
125 connect_timeout = rdate_timeout * SECONDS_TO_MS; | |
126 for (; res != NULL; res = res->ai_next) { | |
127 s = socket(res->ai_addr->sa_family, res->ai_socktype, | |
128 res->ai_protocol); | |
129 if (s < 0) { | |
130 perror("rdate: socket"); | |
131 exit(EXIT_FAILURE); | |
132 } | |
133 | |
134 if (setsockopt(s, IPPROTO_TCP, TCP_CONN_ABORT_THRESHOLD, | |
135 (char *)&connect_timeout, sizeof (connect_timeout)) == -1) { | |
136 perror("setsockopt TCP_CONN_ABORT_THRESHOLD"); | |
137 } | |
138 | |
139 if (connect(s, res->ai_addr, res->ai_addrlen) >= 0) | |
140 break; | |
141 | |
142 if (res->ai_next == NULL) { | |
143 perror("rdate: connect"); | |
144 (void) close(s); | |
145 exit(EXIT_FAILURE); | |
146 } | |
147 | |
148 (void) close(s); | |
149 } | |
150 | |
151 (void) alarm(rdate_timeout); | |
152 if (read(s, (char *)&time, sizeof (time)) != sizeof (time)) { | |
153 perror("rdate: read"); | |
154 exit(EXIT_FAILURE); | |
155 } | |
156 (void) alarm(0); | |
157 | |
158 time = ntohl(time) - TOFFSET; | |
159 /* date must be later than when program was written */ | |
160 if (time < WRITTEN) { | |
161 (void) fprintf(stderr, "didn't get plausible time from %s\n", | |
162 argv[1]); | |
163 exit(EXIT_FAILURE); | |
164 } | |
165 timestruct.tv_usec = 0; | |
166 timestruct.tv_sec = time; | |
167 i = settimeofday(×truct, 0); | |
168 if (i == -1) { | |
169 perror("couldn't set time of day"); | |
170 exit(EXIT_FAILURE); | |
171 } else { | |
172 (void) printf("%s", ctime(×truct.tv_sec)); | |
173 #if defined(i386) | |
174 (void) system("/usr/sbin/rtc -c > /dev/null 2>&1"); | |
175 #endif | |
176 } | |
177 return (EXIT_SUCCESS); | |
178 } | |
179 | |
180 /*ARGSUSED*/ | |
181 static void | |
182 timeout(int sig) | |
183 { | |
184 (void) fputs("couldn't contact time server\n", stderr); | |
185 exit(EXIT_FAILURE); | |
186 /* NOTREACHED */ | |
187 } |