diff options
Diffstat (limited to 'source/utils/net_time.c')
| -rw-r--r-- | source/utils/net_time.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/source/utils/net_time.c b/source/utils/net_time.c new file mode 100644 index 00000000000..8d0c854e286 --- /dev/null +++ b/source/utils/net_time.c @@ -0,0 +1,160 @@ +/* + Samba Unix/Linux SMB client library + Version 3.0 + 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) +{ + struct nmb_name calling, called; + time_t ret = 0; + extern pstring global_myname; + 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; + + cli_shutdown(cli); + +done: + if (cli) cli_shutdown(cli); + return ret; +} + +/* find the servers time on the opt_host host */ +static time_t nettime(void) +{ + 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); +} + +/* return a time as a string ready to be passed to date -u */ +static char *systime(time_t t) +{ + static char s[100]; + struct tm *tm; + + tm = gmtime(&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 -u with the time from the server\n\n"\ +"\n"); + general_rap_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(); + 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 -u %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(); + + if (t == 0) return -1; + + printf("%s\n", systime(t)); + + 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}, + {NULL, NULL} + }; + + if (!opt_host && !opt_have_ip) { + d_printf("You must specify a hostname or IP\n"); + 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); + if (t == 0) return -1; + + d_printf("%s", ctime(&t)); + return 0; +} |