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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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#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 in_addr *ip, int *zone)
{
struct nmb_name calling, called;
time_t ret = 0;
struct cli_state *cli = NULL;
cli = cli_initialise(NULL);
if (!cli) goto done;
if (!cli_connect(cli, host, ip)) {
fprintf(stderr,"Can't contact server\n");
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;
}
if (!cli_negprot(cli)) {
fprintf(stderr,"Protocol negotiation failed\n");
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(int *zone)
{
extern BOOL opt_have_ip;
extern struct in_addr opt_dest_ip;
extern char *opt_host;
return cli_servertime(opt_host, opt_have_ip? &opt_dest_ip : NULL, zone);
}
/* return a time as a string ready to be passed to /bin/date */
static char *systime(time_t t)
{
static char s[100];
struct tm *tm;
tm = localtime(&t);
snprintf(s, sizeof(s), "%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);
return s;
}
int net_time_usage(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(argc, argv);
return -1;
}
/* try to set the system clock using /bin/date */
static int net_time_set(int argc, const char **argv)
{
time_t t = nettime(NULL);
char *cmd;
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 */
asprintf(&cmd, "/bin/date %s", systime(t));
system(cmd);
free(cmd);
return 0;
}
/* display the time on a remote box in a format ready for /bin/date */
static int net_time_system(int argc, const char **argv)
{
time_t t = nettime(NULL);
if (t == 0) return -1;
printf("%s\n", systime(t));
return 0;
}
/* display the time on a remote box in a format ready for /bin/date */
static int net_time_zone(int argc, const char **argv)
{
int zone = 0;
int hours, mins;
char zsign;
time_t t;
t = nettime(&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(int argc, const char **argv)
{
time_t t;
extern BOOL opt_have_ip;
extern struct in_addr opt_dest_ip;
extern char *opt_host;
struct functable func[] = {
{"SYSTEM", net_time_system},
{"SET", net_time_set},
{"ZONE", net_time_zone},
{NULL, NULL}
};
if (!opt_host && !opt_have_ip &&
!find_master_ip(opt_target_workgroup, &opt_dest_ip)) {
d_printf("Could not locate a time server. Try "\
"specifying a target host.\n");
net_time_usage(argc,argv);
return -1;
}
if (argc != 0) {
return net_run_function(argc, argv, func, net_time_usage);
}
/* default - print the time */
t = cli_servertime(opt_host, opt_have_ip? &opt_dest_ip : NULL, NULL);
if (t == 0) return -1;
d_printf("%s", ctime(&t));
return 0;
}
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