1/* 2 Samba Unix/Linux SMB client library 3 net time command 4 Copyright (C) 2001 Andrew Tridgell (tridge@samba.org) 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ 19 20#include "includes.h" 21#include "utils/net.h" 22 23 24/* 25 return the time on a server. This does not require any authentication 26*/ 27static time_t cli_servertime(const char *host, struct in_addr *ip, int *zone) 28{ 29 struct nmb_name calling, called; 30 time_t ret = 0; 31 struct cli_state *cli = NULL; 32 33 cli = cli_initialise(NULL); 34 if (!cli) goto done; 35 36 if (!cli_connect(cli, host, ip)) { 37 fprintf(stderr,"Can't contact server\n"); 38 goto done; 39 } 40 41 make_nmb_name(&calling, global_myname(), 0x0); 42 if (host) { 43 make_nmb_name(&called, host, 0x20); 44 } else { 45 make_nmb_name(&called, "*SMBSERVER", 0x20); 46 } 47 48 if (!cli_session_request(cli, &calling, &called)) { 49 fprintf(stderr,"Session request failed\n"); 50 goto done; 51 } 52 if (!cli_negprot(cli)) { 53 fprintf(stderr,"Protocol negotiation failed\n"); 54 goto done; 55 } 56 57 ret = cli->servertime; 58 if (zone) *zone = cli->serverzone; 59 60done: 61 if (cli) cli_shutdown(cli); 62 return ret; 63} 64 65/* find the servers time on the opt_host host */ 66static time_t nettime(int *zone) 67{ 68 return cli_servertime(opt_host, opt_have_ip? &opt_dest_ip : NULL, zone); 69} 70 71/* return a time as a string ready to be passed to /bin/date */ 72static char *systime(time_t t) 73{ 74 static fstring s; 75 struct tm *tm; 76 77 tm = localtime(&t); 78 79 fstr_sprintf(s, "%02d%02d%02d%02d%04d.%02d", 80 tm->tm_mon+1, tm->tm_mday, tm->tm_hour, 81 tm->tm_min, tm->tm_year + 1900, tm->tm_sec); 82 return s; 83} 84 85int net_time_usage(int argc, const char **argv) 86{ 87 d_printf( 88"net time\n\tdisplays time on a server\n\n"\ 89"net time system\n\tdisplays time on a server in a format ready for /bin/date\n\n"\ 90"net time set\n\truns /bin/date with the time from the server\n\n"\ 91"net time zone\n\tdisplays the timezone in hours from GMT on the remote computer\n\n"\ 92"\n"); 93 net_common_flags_usage(argc, argv); 94 return -1; 95} 96 97/* try to set the system clock using /bin/date */ 98static int net_time_set(int argc, const char **argv) 99{ 100 time_t t = nettime(NULL); 101 char *cmd; 102 103 if (t == 0) return -1; 104 105 /* yes, I know this is cheesy. Use "net time system" if you want to 106 roll your own. I'm putting this in as it works on a large number 107 of systems and the user has a choice in whether its used or not */ 108 asprintf(&cmd, "/bin/date %s", systime(t)); 109 system(cmd); 110 free(cmd); 111 112 return 0; 113} 114 115/* display the time on a remote box in a format ready for /bin/date */ 116static int net_time_system(int argc, const char **argv) 117{ 118 time_t t = nettime(NULL); 119 120 if (t == 0) return -1; 121 122 printf("%s\n", systime(t)); 123 124 return 0; 125} 126 127/* display the time on a remote box in a format ready for /bin/date */ 128static int net_time_zone(int argc, const char **argv) 129{ 130 int zone = 0; 131 int hours, mins; 132 char zsign; 133 time_t t; 134 135 t = nettime(&zone); 136 137 if (t == 0) return -1; 138 139 zsign = (zone > 0) ? '-' : '+'; 140 if (zone < 0) zone = -zone; 141 142 zone /= 60; 143 hours = zone / 60; 144 mins = zone % 60; 145 146 printf("%c%02d%02d\n", zsign, hours, mins); 147 148 return 0; 149} 150 151/* display or set the time on a host */ 152int net_time(int argc, const char **argv) 153{ 154 time_t t; 155 struct functable func[] = { 156 {"SYSTEM", net_time_system}, 157 {"SET", net_time_set}, 158 {"ZONE", net_time_zone}, 159 {NULL, NULL} 160 }; 161 162 if (!opt_host && !opt_have_ip && 163 !find_master_ip(opt_target_workgroup, &opt_dest_ip)) { 164 d_printf("Could not locate a time server. Try "\ 165 "specifying a target host.\n"); 166 net_time_usage(argc,argv); 167 return -1; 168 } 169 170 if (argc != 0) { 171 return net_run_function(argc, argv, func, net_time_usage); 172 } 173 174 /* default - print the time */ 175 t = cli_servertime(opt_host, opt_have_ip? &opt_dest_ip : NULL, NULL); 176 if (t == 0) return -1; 177 178 d_printf("%s", ctime(&t)); 179 return 0; 180} 181