diff options
Diffstat (limited to 'rdate.c')
-rw-r--r-- | rdate.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/rdate.c b/rdate.c deleted file mode 100644 index 04a76129a..000000000 --- a/rdate.c +++ /dev/null | |||
@@ -1,116 +0,0 @@ | |||
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 <sys/time.h> | ||
25 | #include <sys/types.h> | ||
26 | #include <sys/socket.h> | ||
27 | #include <netinet/in.h> | ||
28 | #include <netdb.h> | ||
29 | #include <stdio.h> | ||
30 | #include <getopt.h> | ||
31 | #include <string.h> | ||
32 | #include <time.h> | ||
33 | #include <stdlib.h> | ||
34 | #include <unistd.h> | ||
35 | #include "busybox.h" | ||
36 | |||
37 | |||
38 | static const int RFC_868_BIAS = 2208988800UL; | ||
39 | |||
40 | static time_t askremotedate(const char *host) | ||
41 | { | ||
42 | struct hostent *h; | ||
43 | struct sockaddr_in s_in; | ||
44 | struct servent *tserv; | ||
45 | unsigned long int nett, localt; | ||
46 | int fd; | ||
47 | |||
48 | h = xgethostbyname(host); /* get the IP addr */ | ||
49 | memcpy(&s_in.sin_addr, h->h_addr, sizeof(s_in.sin_addr)); | ||
50 | |||
51 | s_in.sin_port = htons(37); /* find port # */ | ||
52 | if ((tserv = getservbyname("time", "tcp")) != NULL) | ||
53 | s_in.sin_port = tserv->s_port; | ||
54 | |||
55 | s_in.sin_family = AF_INET; | ||
56 | |||
57 | if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) /* get net connection */ | ||
58 | perror_msg_and_die("socket"); | ||
59 | |||
60 | if (connect(fd, (struct sockaddr *)&s_in, sizeof(s_in)) < 0) /* connect to time server */ | ||
61 | perror_msg_and_die("%s", host); | ||
62 | |||
63 | if (read(fd, (void *)&nett, 4) != 4) /* read time from server */ | ||
64 | error_msg_and_die("%s did not send the complete time", host); | ||
65 | |||
66 | close(fd); | ||
67 | |||
68 | /* convert from network byte order to local byte order. | ||
69 | * RFC 868 time is the number of seconds | ||
70 | * since 00:00 (midnight) 1 January 1900 GMT | ||
71 | * the RFC 868 time 2,208,988,800 corresponds to 00:00 1 Jan 1970 GMT | ||
72 | * Subtract the RFC 868 time to get Linux epoch | ||
73 | */ | ||
74 | localt= ntohl(nett) - RFC_868_BIAS; | ||
75 | |||
76 | return(localt); | ||
77 | } | ||
78 | |||
79 | int rdate_main(int argc, char **argv) | ||
80 | { | ||
81 | time_t remote_time; | ||
82 | int opt; | ||
83 | int setdate = 1; | ||
84 | int printdate = 1; | ||
85 | |||
86 | /* Interpret command line args */ | ||
87 | while ((opt = getopt(argc, argv, "sp")) > 0) { | ||
88 | switch (opt) { | ||
89 | case 's': | ||
90 | printdate = 0; | ||
91 | setdate = 1; | ||
92 | break; | ||
93 | case 'p': | ||
94 | printdate = 1; | ||
95 | setdate = 0; | ||
96 | break; | ||
97 | default: | ||
98 | show_usage(); | ||
99 | } | ||
100 | } | ||
101 | |||
102 | if (optind == argc) | ||
103 | show_usage(); | ||
104 | |||
105 | remote_time = askremotedate(argv[optind]); | ||
106 | |||
107 | if (setdate) { | ||
108 | if (stime(&remote_time) < 0) | ||
109 | perror_msg_and_die("Could not set time of day"); | ||
110 | } | ||
111 | |||
112 | if (printdate) | ||
113 | printf("%s", ctime(&remote_time)); | ||
114 | |||
115 | return EXIT_SUCCESS; | ||
116 | } | ||