/* 
   Unix SMB/CIFS implementation.

   Send messages to other Samba daemons

   Copyright (C) Tim Potter 2003
   Copyright (C) Andrew Tridgell 1994-1998
   Copyright (C) Martin Pool 2001-2002
   Copyright (C) Simo Sorce 2002
   
   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"

/* Default timeout value when waiting for replies (in seconds) */

#define DEFAULT_TIMEOUT 10

static int timeout = DEFAULT_TIMEOUT;
static int num_replies;		/* Used by message callback fns */

/* Send a message to a destination pid.  Zero means broadcast smbd. */

static BOOL send_message(pid_t pid, int msg_type, const void *buf, int len,
			 BOOL duplicates)
{
	TDB_CONTEXT *tdb;
	BOOL ret;
	int n_sent = 0;

	if (!message_init())
		return False;

	if (pid != 0)
		return message_send_pid(pid, msg_type, buf, len, duplicates);

	tdb = tdb_open_log(lock_path("connections.tdb"), 0, 
			   TDB_DEFAULT, O_RDWR, 0);
	if (!tdb) {
		fprintf(stderr,"Failed to open connections database"
			": %s\n", strerror(errno));
		return False;
	}
	
	ret = message_send_all(tdb,msg_type, buf, len, duplicates,
			       &n_sent);
	DEBUG(10,("smbcontrol/send_message: broadcast message to "
		  "%d processes\n", n_sent));
	
	tdb_close(tdb);
	
	return ret;
}

/* Wait for one or more reply messages */

static void wait_replies(BOOL multiple_replies)
{
	time_t start_time = time(NULL);

	/* Wait around a bit.  This is pretty disgusting - we have to
           busy-wait here as there is no nicer way to do it. */

	do {
		message_dispatch();
		if (num_replies > 0 && !multiple_replies)
			break;
		sleep(1);
	} while (timeout - (time(NULL) - start_time) > 0);
}

/* Message handler callback that displays the PID and a string on stdout */

static void print_pid_string_cb(int msg_type, pid_t pid, void *buf, size_t len)
{
	printf("PID %u: %.*s", (unsigned int)pid, (int)len, (const char *)buf);
	num_replies++;
}

/* Message handler callback that displays a string on stdout */

static void print_string_cb(int msg_type, pid_t pid, void *buf, size_t len)
{
	printf("%.*s", (int)len, (const char *)buf);
	num_replies++;
}

/* Send no message.  Useful for testing. */

static BOOL do_noop(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> noop\n");
		return False;
	}

	/* Move along, nothing to see here */

	return True;
}

/* Send a debug string */

static BOOL do_debug(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 2) {
		fprintf(stderr, "Usage: smbcontrol <dest> debug "
			"<debug-string>\n");
		return False;
	}

	return send_message(
		pid, MSG_DEBUG, argv[1], strlen(argv[1]) + 1, False);
}

/* Force a browser election */

static BOOL do_election(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> force-election\n");
		return False;
	}

	return send_message(
		pid, MSG_FORCE_ELECTION, NULL, 0, False);
}

/* Ping a samba daemon process */

static void pong_cb(int msg_type, pid_t pid, void *buf, size_t len)
{
	printf("PONG from pid %u\n", (unsigned int)pid);
	num_replies++;
}

static BOOL do_ping(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> ping\n");
		return False;
	}

	/* Send a message and register our interest in a reply */

	if (!send_message(pid, MSG_PING, NULL, 0, False))
		return False;

	message_register(MSG_PONG, pong_cb);

	wait_replies(pid == 0);

	/* No replies were received within the timeout period */

	if (num_replies == 0)
		printf("No replies received\n");

	message_deregister(MSG_PONG);

	return num_replies;
}

/* Set profiling options */

static BOOL do_profile(const pid_t pid, const int argc, const char **argv)
{
	int v;

	if (argc != 2) {
		fprintf(stderr, "Usage: smbcontrol <dest> profile "
			"<off|count|on|flush>\n");
		return False;
	}

	if (strcmp(argv[1], "off") == 0) {
		v = 0;
	} else if (strcmp(argv[1], "count") == 0) {
		v = 1;
	} else if (strcmp(argv[1], "on") == 0) {
		v = 2;
	} else if (strcmp(argv[1], "flush") == 0) {
		v = 3;
	} else {
		fprintf(stderr, "Unknown profile command '%s'\n", argv[1]);
		return False;
	}

	return send_message(pid, MSG_PROFILE, &v, sizeof(int), False);
}

/* Return the profiling level */

static void profilelevel_cb(int msg_type, pid_t pid, void *buf, size_t len)
{
	int level;
	const char *s;

	num_replies++;

	if (len != sizeof(int)) {
		fprintf(stderr, "invalid message length %ld returned\n", 
			(unsigned long)len);
		return;
	}

	memcpy(&level, buf, sizeof(int));

	switch (level) {
	case 0:
		s = "not enabled";
		break;
	case 1:
		s = "off";
		break;
	case 3:
		s = "count only";
		break;
	case 7:
		s = "count and time";
		break;
	default:
		s = "BOGUS";
		break;
	}
	
	printf("Profiling %s on pid %u\n",s,(unsigned int)pid);
}

static void profilelevel_rqst(int msg_type, pid_t pid, void *buf, size_t len)
{
	int v = 0;

	/* Send back a dummy reply */

	send_message(pid, MSG_PROFILELEVEL, &v, sizeof(int), False);
}

static BOOL do_profilelevel(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> profilelevel\n");
		return False;
	}

	/* Send a message and register our interest in a reply */

	if (!send_message(pid, MSG_REQ_PROFILELEVEL, NULL, 0, False))
		return False;

	message_register(MSG_PROFILELEVEL, profilelevel_cb);
	message_register(MSG_REQ_PROFILELEVEL, profilelevel_rqst);

	wait_replies(pid == 0);

	/* No replies were received within the timeout period */

	if (num_replies == 0)
		printf("No replies received\n");

	message_deregister(MSG_PROFILE);

	return num_replies;
}

/* Display debug level settings */

static BOOL do_debuglevel(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> debuglevel\n");
		return False;
	}

	/* Send a message and register our interest in a reply */

	if (!send_message(pid, MSG_REQ_DEBUGLEVEL, NULL, 0, False))
		return False;

	message_register(MSG_DEBUGLEVEL, print_pid_string_cb);

	wait_replies(pid == 0);

	/* No replies were received within the timeout period */

	if (num_replies == 0)
		printf("No replies received\n");

	message_deregister(MSG_DEBUGLEVEL);

	return num_replies;
}

/* Send a print notify message */

static BOOL do_printnotify(const pid_t pid, const int argc, const char **argv)
{
	const char *cmd;

	/* Check for subcommand */

	if (argc == 1) {
		fprintf(stderr, "Must specify subcommand:\n");
		fprintf(stderr, "\tqueuepause <printername>\n");
		fprintf(stderr, "\tqueueresume <printername>\n");
		fprintf(stderr, "\tjobpause <printername> <unix jobid>\n");
		fprintf(stderr, "\tjobresume <printername> <unix jobid>\n");
		fprintf(stderr, "\tjobdelete <printername> <unix jobid>\n");
		fprintf(stderr, "\tprinter <printername> <comment|port|"
			"driver> <value>\n");
		
		return False;
	}

	cmd = argv[1];

	if (strcmp(cmd, "queuepause") == 0) {

		if (argc != 3) {
			fprintf(stderr, "Usage: smbcontrol <dest> printnotify"
				" queuepause <printername>\n");
			return False;
		}
		
		notify_printer_status_byname(argv[2], PRINTER_STATUS_PAUSED);

		goto send;

	} else if (strcmp(cmd, "queueresume") == 0) {

		if (argc != 3) {
			fprintf(stderr, "Usage: smbcontrol <dest> printnotify"
				" queuereume <printername>\n");
			return False;
		}
		
		notify_printer_status_byname(argv[2], PRINTER_STATUS_OK);

		goto send;

	} else if (strcmp(cmd, "jobpause") == 0) {
		int jobid;

		if (argc != 4) {
			fprintf(stderr, "Usage: smbcontrol <dest> printnotify"
				" jobpause <printername> <unix-jobid>\n");
			return False;
		}

		jobid = atoi(argv[3]);

		notify_job_status_byname(
			argv[2], jobid, JOB_STATUS_PAUSED, 
			SPOOLSS_NOTIFY_MSG_UNIX_JOBID);

		goto send;

	} else if (strcmp(cmd, "jobresume") == 0) {
		int jobid;

		if (argc != 4) {
			fprintf(stderr, "Usage: smbcontrol <dest> printnotify"
				" jobpause <printername> <unix-jobid>\n");
			return False;
		}

		jobid = atoi(argv[3]);

		notify_job_status_byname(
			argv[2], jobid, JOB_STATUS_QUEUED, 
			SPOOLSS_NOTIFY_MSG_UNIX_JOBID);

		goto send;

	} else if (strcmp(cmd, "jobdelete") == 0) {
		int jobid;

		if (argc != 4) {
			fprintf(stderr, "Usage: smbcontrol <dest> printnotify"
				" jobpause <printername> <unix-jobid>\n");
			return False;
		}

		jobid = atoi(argv[3]);

		notify_job_status_byname(
			argv[2], jobid, JOB_STATUS_DELETING,
			SPOOLSS_NOTIFY_MSG_UNIX_JOBID);
		
		notify_job_status_byname(
			argv[2], jobid, JOB_STATUS_DELETING|
			JOB_STATUS_DELETED,
			SPOOLSS_NOTIFY_MSG_UNIX_JOBID);

		goto send;

	} else if (strcmp(cmd, "printer") == 0) {
		uint32 attribute;
		
		if (argc != 5) {
			fprintf(stderr, "Usage: smbcontrol <dest> printnotify "
				"printer <printername> <comment|port|driver> "
				"<value>\n");
			return False;
		}

		if (strcmp(argv[3], "comment") == 0) {
			attribute = PRINTER_NOTIFY_COMMENT;
		} else if (strcmp(argv[3], "port") == 0) {
			attribute = PRINTER_NOTIFY_PORT_NAME;
		} else if (strcmp(argv[3], "driver") == 0) {
			attribute = PRINTER_NOTIFY_DRIVER_NAME;
		} else {
			fprintf(stderr, "Invalid printer command '%s'\n",
				argv[3]);
			return False;
		}

		notify_printer_byname(argv[2], attribute, argv[4]);

		goto send;
	}

	fprintf(stderr, "Invalid subcommand '%s'\n", cmd);
	return False;

send:
	print_notify_send_messages(0);
	return True;
}

/* Close a share */

static BOOL do_closeshare(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 2) {
		fprintf(stderr, "Usage: smbcontrol <dest> close-share "
			"<sharename>\n");
		return False;
	}

	return send_message(
		pid, MSG_SMB_FORCE_TDIS, argv[1], strlen(argv[1]) + 1, False);
}

/* Force a SAM synchronisation */

static BOOL do_samsync(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> samsync\n");
		return False;
	}

	return send_message(
		pid, MSG_SMB_SAM_SYNC, NULL, 0, False);
}

/* Force a SAM replication */

static BOOL do_samrepl(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> samrepl\n");
		return False;
	}

	return send_message(
		pid, MSG_SMB_SAM_REPL, NULL, 0, False);
}

/* Display talloc pool usage */

static BOOL do_poolusage(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> pool-usage\n");
		return False;
	}

	/* Send a message and register our interest in a reply */

	if (!send_message(pid, MSG_REQ_POOL_USAGE, NULL, 0, False))
		return False;

	message_register(MSG_POOL_USAGE, print_string_cb);

	wait_replies(pid == 0);

	/* No replies were received within the timeout period */

	if (num_replies == 0)
		printf("No replies received\n");

	message_deregister(MSG_POOL_USAGE);

	return num_replies;
}

/* Perform a dmalloc mark */

static BOOL do_dmalloc_mark(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> dmalloc-mark\n");
		return False;
	}

	return send_message(
		pid, MSG_REQ_DMALLOC_MARK, NULL, 0, False);
}

/* Perform a dmalloc changed */

static BOOL do_dmalloc_changed(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> "
			"dmalloc-log-changed\n");
		return False;
	}

	return send_message(
		pid, MSG_REQ_DMALLOC_LOG_CHANGED, NULL, 0, False);
}

/* Shutdown a server process */

static BOOL do_shutdown(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> shutdown\n");
		return False;
	}

	return send_message(pid, MSG_SHUTDOWN, NULL, 0, False);
}

/* Notify a driver upgrade */

static BOOL do_drvupgrade(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 2) {
		fprintf(stderr, "Usage: smbcontrol <dest> drvupgrade "
			"<driver-name>\n");
		return False;
	}

	return send_message(
		pid, MSG_DEBUG, argv[1], strlen(argv[1]) + 1, False);
}

static BOOL do_reload_config(const pid_t pid, const int argc, const char **argv)
{
	if (argc != 1) {
		fprintf(stderr, "Usage: smbcontrol <dest> reload-config\n");
		return False;
	}

	return send_message(pid, MSG_SMB_CONF_UPDATED, NULL, 0, False);
}

/* A list of message type supported */

static const struct {
	const char *name;	/* Option name */
	BOOL (*fn)(const pid_t pid, const int argc, const char **argv);
	const char *help;	/* Short help text */
} msg_types[] = {
	{ "debug", do_debug, "Set debuglevel"  },
	{ "force-election", do_election,
	  "Force a browse election" },
	{ "ping", do_ping, "Elicit a response" },
	{ "profile", do_profile, "" },
	{ "profilelevel", do_profilelevel, "" },
	{ "debuglevel", do_debuglevel, "Display current debuglevels" },
	{ "printnotify", do_printnotify, "Send a print notify message" },
	{ "close-share", do_closeshare, "Forcibly disconnect a share" },
        { "samsync", do_samsync, "Initiate SAM synchronisation" },
        { "samrepl", do_samrepl, "Initiate SAM replication" },
	{ "pool-usage", do_poolusage, "Display talloc memory usage" },
	{ "dmalloc-mark", do_dmalloc_mark, "" },
	{ "dmalloc-log-changed", do_dmalloc_changed, "" },
	{ "shutdown", do_shutdown, "Shut down daemon" },
	{ "drvupgrade", do_drvupgrade, "Notify a printer driver has changed" },
	{ "reload-config", do_reload_config, "Force smbd or winbindd to reload config file"},
	{ "noop", do_noop, "Do nothing" },
	{ NULL }
};

/* Display usage information */

static void usage(poptContext *pc)
{
	int i;

	poptPrintHelp(*pc, stderr, 0);

	fprintf(stderr, "\n");
	fprintf(stderr, "<destination> is one of \"nmbd\", \"smbd\" or a "
		"process ID\n");

	fprintf(stderr, "\n");
	fprintf(stderr, "<message-type> is one of:\n");

	for (i = 0; msg_types[i].name; i++) 
	    fprintf(stderr, "\t%-30s%s\n", msg_types[i].name, 
		    msg_types[i].help);

	fprintf(stderr, "\n");

	exit(1);
}

/* Return the pid number for a string destination */

static pid_t parse_dest(const char *dest)
{
	pid_t pid;

	/* Zero is a special return value for broadcast smbd */

	if (strequal(dest, "smbd"))
		return 0;

	/* Try self - useful for testing */

	if (strequal(dest, "self"))
		return sys_getpid();

	/* Check for numeric pid number */

	if ((pid = atoi(dest)) != 0)
		return pid;

	/* Look up other destinations in pidfile directory */

	if ((pid = pidfile_pid(dest)) != 0)
		return pid;

	fprintf(stderr,"Can't find pid for destination '%s'\n", dest);

	return -1;
}	

/* Execute smbcontrol command */

static BOOL do_command(int argc, const char **argv)
{
	const char *dest = argv[0], *command = argv[1];
	pid_t pid;
	int i;

	/* Check destination */

	if ((pid = parse_dest(dest)) == -1)
		return False;

	/* Check command */

	for (i = 0; msg_types[i].name; i++) {
		if (strequal(command, msg_types[i].name))
			return msg_types[i].fn(pid, argc - 1, argv + 1);
	}

	fprintf(stderr, "smbcontrol: unknown command '%s'\n", command);

	return False;
}

/* Main program */

int main(int argc, const char **argv)
{
	poptContext pc;
	int opt;

	static struct poptOption wbinfo_options[] = {
		{ "timeout", 't', POPT_ARG_INT, &timeout, 't', 
		  "Set timeout value in seconds", "TIMEOUT" },

		{ "configfile", 's', POPT_ARG_STRING, NULL, 's', 
		  "Use alternative configuration file", "CONFIGFILE" },

		POPT_TABLEEND
	};

	struct poptOption options[] = {
		{ NULL, 0, POPT_ARG_INCLUDE_TABLE, wbinfo_options, 0, 
		  "Options" },

		POPT_AUTOHELP
		POPT_COMMON_VERSION
		POPT_TABLEEND
	};

	setup_logging(argv[0],True);
	
	/* Parse command line arguments using popt */

	pc = poptGetContext(
		"smbcontrol", argc, (const char **)argv, options, 0);

	poptSetOtherOptionHelp(pc, "[OPTION...] <destination> <message-type> "
			       "<parameters>");

	if (argc == 1)
		usage(&pc);

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch(opt) {
		case 't':	/* --timeout */
			argc -= 2;
			break;
		case 's':	/* --configfile */
			pstrcpy(dyn_CONFIGFILE, poptGetOptArg(pc));
			argc -= 2;
			break;
		default:
			fprintf(stderr, "Invalid option\n");
			poptPrintHelp(pc, stderr, 0);
			break;
		}
	}

	/* We should now have the remaining command line arguments in
           argv.  The argc parameter should have been decremented to the
           correct value in the above switch statement. */

	argv = (const char **)poptGetArgs(pc);
	argc--;			/* Don't forget about argv[0] */

	if (argc == 1)
		usage(&pc);

	lp_load(dyn_CONFIGFILE,False,False,False);

	/* Need to invert sense of return code -- samba
         * routines mostly return True==1 for success, but
         * shell needs 0. */ 
	
	return !do_command(argc, argv);
}
