diff options
Diffstat (limited to 'source3/utils/net_time.c')
| -rw-r--r-- | source3/utils/net_time.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/source3/utils/net_time.c b/source3/utils/net_time.c new file mode 100644 index 0000000000..f569538fac --- /dev/null +++ b/source3/utils/net_time.c @@ -0,0 +1,238 @@ +/* + 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; + } + 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(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) +{ + static fstring s; + struct tm *tm; + + tm = localtime(&t); + if (!tm) { + return "unknown"; + } + + fstr_sprintf(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(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 */ + asprintf(&cmd, "/bin/date %s", systime(t)); + 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, + "Display time ready for /bin/date", + "net time system\n" + " Display time ready for /bin/date" + }, + { + "set", + net_time_set, + NET_TRANSPORT_LOCAL, + "Set the system time from time server", + "net time set\n" + " Set the system time from time server" + }, + { + "zone", + net_time_zone, + NET_TRANSPORT_LOCAL, + "Display timezone offset from UTC", + "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"); + d_printf("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; +} |