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Samba Unix/Linux SMB client library
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Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "utils/net.h"
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return the time on a server. This does not require any authentication
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static time_t cli_servertime(const char *host, struct sockaddr_storage *pss, int *zone)
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struct nmb_name calling, called;
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struct cli_state *cli = NULL;
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cli = cli_initialise();
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status = cli_connect(cli, host, pss);
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if (!NT_STATUS_IS_OK(status)) {
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fprintf(stderr,"Can't contact server %s. Error %s\n", host, nt_errstr(status));
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make_nmb_name(&calling, global_myname(), 0x0);
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make_nmb_name(&called, host, 0x20);
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make_nmb_name(&called, "*SMBSERVER", 0x20);
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if (!cli_session_request(cli, &calling, &called)) {
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fprintf(stderr,"Session request failed\n");
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if (!cli_negprot(cli)) {
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fprintf(stderr,"Protocol negotiation failed\n");
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ret = cli->servertime;
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if (zone) *zone = cli->serverzone;
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/* find the servers time on the opt_host host */
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static time_t nettime(struct net_context *c, int *zone)
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return cli_servertime(c->opt_host,
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c->opt_have_ip? &c->opt_dest_ip : NULL, zone);
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/* return a time as a string ready to be passed to /bin/date */
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static const char *systime(time_t t)
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fstr_sprintf(s, "%02d%02d%02d%02d%04d.%02d",
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tm->tm_mon+1, tm->tm_mday, tm->tm_hour,
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tm->tm_min, tm->tm_year + 1900, tm->tm_sec);
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int net_time_usage(struct net_context *c, int argc, const char **argv)
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"net time\n\tdisplays time on a server\n\n"
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"net time system\n\tdisplays time on a server in a format ready for /bin/date\n\n"
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"net time set\n\truns /bin/date with the time from the server\n\n"
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"net time zone\n\tdisplays the timezone in hours from GMT on the remote computer\n\n"
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net_common_flags_usage(c, argc, argv);
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/* try to set the system clock using /bin/date */
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static int net_time_set(struct net_context *c, int argc, const char **argv)
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time_t t = nettime(c, NULL);
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if (t == 0) return -1;
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/* yes, I know this is cheesy. Use "net time system" if you want to
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roll your own. I'm putting this in as it works on a large number
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of systems and the user has a choice in whether its used or not */
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if (asprintf(&cmd, "/bin/date %s", systime(t)) == -1) {
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result = system(cmd);
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d_fprintf(stderr, "%s failed. Error was (%s)\n",
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cmd, strerror(errno));
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/* display the time on a remote box in a format ready for /bin/date */
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static int net_time_system(struct net_context *c, int argc, const char **argv)
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if (c->display_usage) {
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" Output remote time server time in a format ready "
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t = nettime(c, NULL);
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if (t == 0) return -1;
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printf("%s\n", systime(t));
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/* display the remote time server's offset to UTC */
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static int net_time_zone(struct net_context *c, int argc, const char **argv)
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if (c->display_usage) {
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" Display the remote time server's offset to UTC\n");
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t = nettime(c, &zone);
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if (t == 0) return -1;
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zsign = (zone > 0) ? '-' : '+';
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if (zone < 0) zone = -zone;
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printf("%c%02d%02d\n", zsign, hours, mins);
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/* display or set the time on a host */
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int net_time(struct net_context *c, int argc, const char **argv)
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struct functable func[] = {
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"Display time ready for /bin/date",
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" Display time ready for /bin/date"
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"Set the system time from time server",
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" Set the system time from time server"
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"Display timezone offset from UTC",
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" Display timezone offset from UTC"
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{NULL, NULL, 0, NULL, NULL}
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return net_run_function(c, argc, argv, "net time", func);
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if (c->display_usage) {
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d_printf("Usage:\n");
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d_printf("net time\n"
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" Display the remote time server's time\n");
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net_display_usage_from_functable(func);
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if (!c->opt_host && !c->opt_have_ip &&
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!find_master_ip(c->opt_target_workgroup, &c->opt_dest_ip)) {
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d_fprintf(stderr, "Could not locate a time server. Try "
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"specifying a target host.\n");
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net_time_usage(c, argc,argv);
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/* default - print the time */
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t = cli_servertime(c->opt_host, c->opt_have_ip? &c->opt_dest_ip : NULL,
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if (t == 0) return -1;
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d_printf("%s", ctime(&t));