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/*
Samba Unix/Linux SMB client library
net time command
Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "utils/net.h"
/*
return the time on a server. This does not require any authentication
*/
static time_t cli_servertime(const char *host, struct sockaddr_storage *pss, int *zone)
{
struct nmb_name calling, called;
time_t ret = 0;
struct cli_state *cli = NULL;
NTSTATUS status;
cli = cli_initialise();
if (!cli) {
goto done;
}
status = cli_connect(cli, host, pss);
if (!NT_STATUS_IS_OK(status)) {
fprintf(stderr, _("Can't contact server %s. Error %s\n"),
host, nt_errstr(status));
goto done;
}
make_nmb_name(&calling, global_myname(), 0x0);
if (host) {
make_nmb_name(&called, host, 0x20);
} else {
make_nmb_name(&called, "*SMBSERVER", 0x20);
}
if (!cli_session_request(cli, &calling, &called)) {
fprintf(stderr, _("Session request failed\n"));
goto done;
}
status = cli_negprot(cli);
if (!NT_STATUS_IS_OK(status)) {
fprintf(stderr, _("Protocol negotiation failed: %s\n"),
nt_errstr(status));
goto done;
}
ret = cli->servertime;
if (zone) *zone = cli->serverzone;
done:
if (cli) {
cli_shutdown(cli);
}
return ret;
}
/* find the servers time on the opt_host host */
static time_t nettime(struct net_context *c, int *zone)
{
return cli_servertime(c->opt_host,
c->opt_have_ip? &c->opt_dest_ip : NULL, zone);
}
/* return a time as a string ready to be passed to /bin/date */
static const char *systime(time_t t)
{
struct tm *tm;
tm = localtime(&t);
if (!tm) {
return "unknown";
}
return talloc_asprintf(talloc_tos(), "%02d%02d%02d%02d%04d.%02d",
tm->tm_mon+1, tm->tm_mday, tm->tm_hour,
tm->tm_min, tm->tm_year + 1900, tm->tm_sec);
}
int net_time_usage(struct net_context *c, int argc, const char **argv)
{
d_printf(_(
"net time\n\tdisplays time on a server\n\n"
"net time system\n\tdisplays time on a server in a format ready for /bin/date\n\n"
"net time set\n\truns /bin/date with the time from the server\n\n"
"net time zone\n\tdisplays the timezone in hours from GMT on the remote computer\n\n"
"\n"));
net_common_flags_usage(c, argc, argv);
return -1;
}
/* try to set the system clock using /bin/date */
static int net_time_set(struct net_context *c, int argc, const char **argv)
{
time_t t = nettime(c, NULL);
char *cmd;
int result;
if (t == 0) return -1;
/* yes, I know this is cheesy. Use "net time system" if you want to
roll your own. I'm putting this in as it works on a large number
of systems and the user has a choice in whether its used or not */
if (asprintf(&cmd, "/bin/date %s", systime(t)) == -1) {
return -1;
}
result = system(cmd);
if (result)
d_fprintf(stderr, _("%s failed. Error was (%s)\n"),
cmd, strerror(errno));
free(cmd);
return result;
}
/* display the time on a remote box in a format ready for /bin/date */
static int net_time_system(struct net_context *c, int argc, const char **argv)
{
time_t t;
if (c->display_usage) {
d_printf(_("Usage:\n"
"net time system\n"
" Output remote time server time in a format "
"ready for /bin/date\n"));
return 0;
}
t = nettime(c, NULL);
if (t == 0) return -1;
printf("%s\n", systime(t));
return 0;
}
/* display the remote time server's offset to UTC */
static int net_time_zone(struct net_context *c, int argc, const char **argv)
{
int zone = 0;
int hours, mins;
char zsign;
time_t t;
if (c->display_usage) {
d_printf(_("Usage:\n"
"net time zone\n"
" Display the remote time server's offset to "
"UTC\n"));
return 0;
}
t = nettime(c, &zone);
if (t == 0) return -1;
zsign = (zone > 0) ? '-' : '+';
if (zone < 0) zone = -zone;
zone /= 60;
hours = zone / 60;
mins = zone % 60;
printf("%c%02d%02d\n", zsign, hours, mins);
return 0;
}
/* display or set the time on a host */
int net_time(struct net_context *c, int argc, const char **argv)
{
time_t t;
struct functable func[] = {
{
"system",
net_time_system,
NET_TRANSPORT_LOCAL,
N_("Display time ready for /bin/date"),
N_("net time system\n"
" Display time ready for /bin/date")
},
{
"set",
net_time_set,
NET_TRANSPORT_LOCAL,
N_("Set the system time from time server"),
N_("net time set\n"
" Set the system time from time server")
},
{
"zone",
net_time_zone,
NET_TRANSPORT_LOCAL,
N_("Display timezone offset from UTC"),
N_("net time zone\n"
" Display timezone offset from UTC")
},
{NULL, NULL, 0, NULL, NULL}
};
if (argc != 0) {
return net_run_function(c, argc, argv, "net time", func);
}
if (c->display_usage) {
d_printf(_("Usage:\n"
"net time\n"
" Display the remote time server's time\n"));
net_display_usage_from_functable(func);
return 0;
}
if (!c->opt_host && !c->opt_have_ip &&
!find_master_ip(c->opt_target_workgroup, &c->opt_dest_ip)) {
d_fprintf(stderr, _("Could not locate a time server. Try "
"specifying a target host.\n"));
net_time_usage(c, argc,argv);
return -1;
}
/* default - print the time */
t = cli_servertime(c->opt_host, c->opt_have_ip? &c->opt_dest_ip : NULL,
NULL);
if (t == 0) return -1;
d_printf("%s", ctime(&t));
return 0;
}
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