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authorEric Andersen <andersen@codepoet.org>2000-08-21 23:04:00 +0000
committerEric Andersen <andersen@codepoet.org>2000-08-21 23:04:00 +0000
commit6ab22027d09a4038a89dd3d6d003a66a5490b818 (patch)
tree1d882f65e0dcc9b1efb0bb825ae9bf1a86ffc3e2
parentfba9c00071eff20f65b8ff6b1e5fa7e5933e038d (diff)
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Oops. Forgot to commit rdate.c.
-Erik
Diffstat
-rw-r--r--rdate.c135
-rw-r--r--util-linux/rdate.c135
2 files changed, 270 insertions, 0 deletions
diff --git a/rdate.c b/rdate.c
new file mode 100644
index 000000000..0668d302a
--- /dev/null
+++ b/rdate.c
@@ -0,0 +1,135 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * The Rdate command will ask a time server for the RFC 868 time
4 * and optionally set the system time.
5 *
6 * by Sterling Huxley <sterling@europa.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22*/
23
24#include "internal.h"
25#define BB_DECLARE_EXTERN
26#include "messages.c"
27#include <sys/time.h>
28#include <sys/types.h>
29#include <sys/socket.h>
30#include <netinet/in.h>
31#include <netdb.h>
32#include <stdio.h>
33#include <getopt.h>
34
35
36#define RFC_868_BIAS 2208988800UL
37
38int setdate= 0;
39int printdate= 0;
40
41time_t askremotedate(char *host)
42{
43 struct hostent *h;
44 struct sockaddr_in sin;
45 struct servent *tserv;
46 unsigned long int nett, localt;
47 int fd;
48
49 if (!(h = gethostbyname(host))) { /* get the IP addr */
50 errorMsg("%s: %s\n", host, strerror(errno));
51 return(-1);
52 }
53 if ((tserv = getservbyname("time", "tcp")) == NULL) { /* find port # */
54 errorMsg("%s: %s\n", "time", strerror(errno));
55 return(-1);
56 }
57 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { /* get net connection */
58 errorMsg("%s: %s\n", "socket", strerror(errno));
59 return(-1);
60 }
61
62 memcpy(&sin.sin_addr, h->h_addr, sizeof(sin.sin_addr));
63 sin.sin_port= tserv->s_port;
64 sin.sin_family = AF_INET;
65
66 if (connect(fd, &sin, sizeof(sin)) < 0) { /* connect to time server */
67 errorMsg("%s: %s\n", host, strerror(errno));
68 close(fd);
69 return(-1);
70 }
71 if (read(fd, &nett, 4) != 4) { /* read time from server */
72 close(fd);
73 errorMsg("%s did not send the complete time\n", host);
74 }
75 close(fd);
76
77 /* convert from network byte order to local byte order.
78 * RFC 868 time is the number of seconds
79 * since 00:00 (midnight) 1 January 1900 GMT
80 * the RFC 868 time 2,208,988,800 corresponds to 00:00 1 Jan 1970 GMT
81 * Subtract the RFC 868 time to get Linux epoch
82 */
83 localt= ntohl(nett) - RFC_868_BIAS;
84
85 return(localt);
86}
87
88int rdate_main(int argc, char **argv)
89{
90 time_t time;
91 int opt;
92
93 /* Interpret command line args */
94 /* do special-case option parsing */
95 if (argv[1] && (strcmp(argv[1], "--help") == 0))
96 usage(rdate_usage);
97
98 /* do normal option parsing */
99 while ((opt = getopt(argc, argv, "Hsp")) > 0) {
100 switch (opt) {
101 default:
102 case 'H':
103 usage(rdate_usage);
104 return(FALSE);
105 break;
106 case 's':
107 setdate++;
108 break;
109 case 'p':
110 printdate++;
111 break;
112 }
113 }
114
115 /* the default action is to set the date */
116 if (printdate==0 && setdate==0) setdate++;
117
118 if (optind == argc) {
119 usage(rdate_usage);
120 return(FALSE);
121 }
122
123 if ((time= askremotedate(argv[optind])) == (time_t)-1) {
124 return(FALSE);
125 }
126 if (setdate) {
127 if (stime(&time) < 0)
128 fatalError("Could not set time of day: %s\n", strerror(errno));
129 }
130 if (printdate) {
131 fprintf(stdout, "%s", ctime(&time));
132 }
133
134 return(TRUE);
135}
diff --git a/util-linux/rdate.c b/util-linux/rdate.c
new file mode 100644
index 000000000..0668d302a
--- /dev/null
+++ b/util-linux/rdate.c
@@ -0,0 +1,135 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * The Rdate command will ask a time server for the RFC 868 time
4 * and optionally set the system time.
5 *
6 * by Sterling Huxley <sterling@europa.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22*/
23
24#include "internal.h"
25#define BB_DECLARE_EXTERN
26#include "messages.c"
27#include <sys/time.h>
28#include <sys/types.h>
29#include <sys/socket.h>
30#include <netinet/in.h>
31#include <netdb.h>
32#include <stdio.h>
33#include <getopt.h>
34
35
36#define RFC_868_BIAS 2208988800UL
37
38int setdate= 0;
39int printdate= 0;
40
41time_t askremotedate(char *host)
42{
43 struct hostent *h;
44 struct sockaddr_in sin;
45 struct servent *tserv;
46 unsigned long int nett, localt;
47 int fd;
48
49 if (!(h = gethostbyname(host))) { /* get the IP addr */
50 errorMsg("%s: %s\n", host, strerror(errno));
51 return(-1);
52 }
53 if ((tserv = getservbyname("time", "tcp")) == NULL) { /* find port # */
54 errorMsg("%s: %s\n", "time", strerror(errno));
55 return(-1);
56 }
57 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { /* get net connection */
58 errorMsg("%s: %s\n", "socket", strerror(errno));
59 return(-1);
60 }
61
62 memcpy(&sin.sin_addr, h->h_addr, sizeof(sin.sin_addr));
63 sin.sin_port= tserv->s_port;
64 sin.sin_family = AF_INET;
65
66 if (connect(fd, &sin, sizeof(sin)) < 0) { /* connect to time server */
67 errorMsg("%s: %s\n", host, strerror(errno));
68 close(fd);
69 return(-1);
70 }
71 if (read(fd, &nett, 4) != 4) { /* read time from server */
72 close(fd);
73 errorMsg("%s did not send the complete time\n", host);
74 }
75 close(fd);
76
77 /* convert from network byte order to local byte order.
78 * RFC 868 time is the number of seconds
79 * since 00:00 (midnight) 1 January 1900 GMT
80 * the RFC 868 time 2,208,988,800 corresponds to 00:00 1 Jan 1970 GMT
81 * Subtract the RFC 868 time to get Linux epoch
82 */
83 localt= ntohl(nett) - RFC_868_BIAS;
84
85 return(localt);
86}
87
88int rdate_main(int argc, char **argv)
89{
90 time_t time;
91 int opt;
92
93 /* Interpret command line args */
94 /* do special-case option parsing */
95 if (argv[1] && (strcmp(argv[1], "--help") == 0))
96 usage(rdate_usage);
97
98 /* do normal option parsing */
99 while ((opt = getopt(argc, argv, "Hsp")) > 0) {
100 switch (opt) {
101 default:
102 case 'H':
103 usage(rdate_usage);
104 return(FALSE);
105 break;
106 case 's':
107 setdate++;
108 break;
109 case 'p':
110 printdate++;
111 break;
112 }
113 }
114
115 /* the default action is to set the date */
116 if (printdate==0 && setdate==0) setdate++;
117
118 if (optind == argc) {
119 usage(rdate_usage);
120 return(FALSE);
121 }
122
123 if ((time= askremotedate(argv[optind])) == (time_t)-1) {
124 return(FALSE);
125 }
126 if (setdate) {
127 if (stime(&time) < 0)
128 fatalError("Could not set time of day: %s\n", strerror(errno));
129 }
130 if (printdate) {
131 fprintf(stdout, "%s", ctime(&time));
132 }
133
134 return(TRUE);
135}
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