X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprocess.c;h=5d78c2954b4604fc447668470e7b72a175d4f451;hp=f03f12a43f08865daa54a3a145f111aa51b5d339;hb=c2dc3784f127ef6db6e9960a4abecc1aab6f4e31;hpb=a60a0a1f1357508063ee565d672c39898a787e33

diff --git a/src/process.c b/src/process.c
index f03f12a4..5d78c295 100644
--- a/src/process.c
+++ b/src/process.c
@@ -1,7 +1,7 @@
 /*
     process.c -- process management functions
     Copyright (C) 1999-2005 Ivo Timmermans,
-                  2000-2007 Guus Sliepen <guus@tinc-vpn.org>
+                  2000-2013 Guus Sliepen <guus@tinc-vpn.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
@@ -13,70 +13,52 @@
     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.
-
-    $Id$
+    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.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
 #include "system.h"
 
 #include "conf.h"
 #include "connection.h"
+#include "control.h"
 #include "device.h"
 #include "edge.h"
+#include "event.h"
 #include "logger.h"
+#include "names.h"
+#include "net.h"
 #include "node.h"
-#include "pidfile.h"
 #include "process.h"
 #include "subnet.h"
 #include "utils.h"
 #include "xalloc.h"
+#include "version.h"
 
 /* If zero, don't detach from the terminal. */
 bool do_detach = true;
-bool sighup = false;
 bool sigalrm = false;
 
-extern char *identname;
-extern char *pidfilename;
 extern char **g_argv;
 extern bool use_logfile;
-extern volatile bool running;
-
-sigset_t emptysigset;
-
-static int saved_debug_level = -1;
-
-static void memory_full(int size)
-{
-	logger(LOG_ERR, _("Memory exhausted (couldn't allocate %d bytes), exitting."), size);
-	cp_trace();
-	exit(1);
-}
+extern bool use_syslog;
 
 /* Some functions the less gifted operating systems might lack... */
 
 #ifdef HAVE_MINGW
-extern char *identname;
-extern char *program_name;
-extern char **g_argv;
-
 static SC_HANDLE manager = NULL;
 static SC_HANDLE service = NULL;
 static SERVICE_STATUS status = {0};
 static SERVICE_STATUS_HANDLE statushandle = 0;
 
-bool install_service(void) {
+static bool install_service(void) {
 	char command[4096] = "\"";
-	char **argp;
-	bool space;
 	SERVICE_DESCRIPTION description = {"Virtual Private Network daemon"};
 
 	manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
 	if(!manager) {
-		logger(LOG_ERR, _("Could not open service manager: %s"), winerror(GetLastError()));
+		logger(DEBUG_ALWAYS, LOG_ERR, "Could not open service manager: %s", winerror(GetLastError()));
 		return false;
 	}
 
@@ -89,13 +71,13 @@ bool install_service(void) {
 
 	strncat(command, "\"", sizeof command - strlen(command));
 
-	for(argp = g_argv + 1; *argp; argp++) {
-		space = strchr(*argp, ' ');
+	for(char **argp = g_argv + 1; *argp; argp++) {
+		char *space = strchr(*argp, ' ');
 		strncat(command, " ", sizeof command - strlen(command));
-		
+
 		if(space)
 			strncat(command, "\"", sizeof command - strlen(command));
-		
+
 		strncat(command, *argp, sizeof command - strlen(command));
 
 		if(space)
@@ -105,52 +87,30 @@ bool install_service(void) {
 	service = CreateService(manager, identname, identname,
 			SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL,
 			command, NULL, NULL, NULL, NULL, NULL);
-	
+
 	if(!service) {
-		logger(LOG_ERR, _("Could not create %s service: %s"), identname, winerror(GetLastError()));
-		return false;
+		DWORD lasterror = GetLastError();
+		logger(DEBUG_ALWAYS, LOG_ERR, "Could not create %s service: %s", identname, winerror(lasterror));
+		if(lasterror != ERROR_SERVICE_EXISTS)
+			return false;
 	}
 
-	ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &description);
-
-	logger(LOG_INFO, _("%s service installed"), identname);
+	if(service) {
+		ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &description);
+		logger(DEBUG_ALWAYS, LOG_INFO, "%s service installed", identname);
+	} else {
+		service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
+	}
 
 	if(!StartService(service, 0, NULL))
-		logger(LOG_WARNING, _("Could not start %s service: %s"), identname, winerror(GetLastError()));
+		logger(DEBUG_ALWAYS, LOG_WARNING, "Could not start %s service: %s", identname, winerror(GetLastError()));
 	else
-		logger(LOG_INFO, _("%s service started"), identname);
+		logger(DEBUG_ALWAYS, LOG_INFO, "%s service started", identname);
 
 	return true;
 }
 
-bool remove_service(void) {
-	manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
-	if(!manager) {
-		logger(LOG_ERR, _("Could not open service manager: %s"), winerror(GetLastError()));
-		return false;
-	}
-
-	service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
-
-	if(!service) {
-		logger(LOG_ERR, _("Could not open %s service: %s"), identname, winerror(GetLastError()));
-		return false;
-	}
-
-	if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
-		logger(LOG_ERR, _("Could not stop %s service: %s"), identname, winerror(GetLastError()));
-	else
-		logger(LOG_INFO, _("%s service stopped"), identname);
-
-	if(!DeleteService(service)) {
-		logger(LOG_ERR, _("Could not remove %s service: %s"), identname, winerror(GetLastError()));
-		return false;
-	}
-
-	logger(LOG_INFO, _("%s service removed"), identname);
-
-	return true;
-}
+io_t stop_io;
 
 DWORD WINAPI controlhandler(DWORD request, DWORD type, LPVOID boe, LPVOID bah) {
 	switch(request) {
@@ -158,62 +118,50 @@ DWORD WINAPI controlhandler(DWORD request, DWORD type, LPVOID boe, LPVOID bah) {
 			SetServiceStatus(statushandle, &status);
 			return NO_ERROR;
 		case SERVICE_CONTROL_STOP:
-			logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_STOP");
+			logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_STOP");
 			break;
 		case SERVICE_CONTROL_SHUTDOWN:
-			logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_SHUTDOWN");
+			logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_SHUTDOWN");
 			break;
 		default:
-			logger(LOG_WARNING, _("Got unexpected request %d"), request);
+			logger(DEBUG_ALWAYS, LOG_WARNING, "Got unexpected request %d", (int)request);
 			return ERROR_CALL_NOT_IMPLEMENTED;
 	}
 
-	if(running) {
-		running = false;
-		status.dwWaitHint = 30000; 
-		status.dwCurrentState = SERVICE_STOP_PENDING; 
-		SetServiceStatus(statushandle, &status);
-		return NO_ERROR;
-	} else {
-		status.dwWaitHint = 0; 
-		status.dwCurrentState = SERVICE_STOPPED; 
-		SetServiceStatus(statushandle, &status);
-		exit(1);
-	}
-
+	status.dwWaitHint = 1000;
+	status.dwCurrentState = SERVICE_STOP_PENDING;
+	SetServiceStatus(statushandle, &status);
+	if (WSASetEvent(stop_io.event) == FALSE)
+		abort();
+	return NO_ERROR;
 }
 
-VOID WINAPI run_service(DWORD argc, LPTSTR* argv)
-{
-	int err = 1;
+VOID WINAPI run_service(DWORD argc, LPTSTR* argv) {
 	extern int main2(int argc, char **argv);
 
-
-	status.dwServiceType = SERVICE_WIN32; 
+	status.dwServiceType = SERVICE_WIN32;
 	status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
-	status.dwWin32ExitCode = 0; 
-	status.dwServiceSpecificExitCode = 0; 
-	status.dwCheckPoint = 0; 
+	status.dwWin32ExitCode = 0;
+	status.dwServiceSpecificExitCode = 0;
+	status.dwCheckPoint = 0;
 
-	statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL); 
+	statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL);
 
 	if (!statushandle) {
-		logger(LOG_ERR, _("System call `%s' failed: %s"), "RegisterServiceCtrlHandlerEx", winerror(GetLastError()));
-		err = 1;
+		logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "RegisterServiceCtrlHandlerEx", winerror(GetLastError()));
 	} else {
-		status.dwWaitHint = 30000; 
-		status.dwCurrentState = SERVICE_START_PENDING; 
+		status.dwWaitHint = 30000;
+		status.dwCurrentState = SERVICE_START_PENDING;
 		SetServiceStatus(statushandle, &status);
 
-		status.dwWaitHint = 0; 
+		status.dwWaitHint = 0;
 		status.dwCurrentState = SERVICE_RUNNING;
 		SetServiceStatus(statushandle, &status);
 
-		err = main2(argc, argv);
+		main2(argc, argv);
 
 		status.dwWaitHint = 0;
-		status.dwCurrentState = SERVICE_STOPPED; 
-		//status.dwWin32ExitCode = err; 
+		status.dwCurrentState = SERVICE_STOPPED;
 		SetServiceStatus(statushandle, &status);
 	}
 
@@ -231,38 +179,7 @@ bool init_service(void) {
 			return false;
 		}
 		else
-			logger(LOG_ERR, _("System call `%s' failed: %s"), "StartServiceCtrlDispatcher", winerror(GetLastError()));
-	}
-
-	return true;
-}
-#endif
-
-#ifndef HAVE_MINGW
-/*
-  check for an existing tinc for this net, and write pid to pidfile
-*/
-static bool write_pidfile(void)
-{
-	pid_t pid;
-
-	cp();
-
-	pid = check_pid(pidfilename);
-
-	if(pid) {
-		if(netname)
-			fprintf(stderr, _("A tincd is already running for net `%s' with pid %ld.\n"),
-					netname, (long)pid);
-		else
-			fprintf(stderr, _("A tincd is already running with pid %ld.\n"), (long)pid);
-		return false;
-	}
-
-	/* if it's locked, write-protected, or whatever */
-	if(!write_pid(pidfilename)) {
-		fprintf(stderr, _("Could write pid file %s: %s\n"), pidfilename, strerror(errno));
-		return false;
+			logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "StartServiceCtrlDispatcher", winerror(GetLastError()));
 	}
 
 	return true;
@@ -270,345 +187,43 @@ static bool write_pidfile(void)
 #endif
 
 /*
-  kill older tincd for this net
-*/
-bool kill_other(int signal)
-{
-#ifndef HAVE_MINGW
-	pid_t pid;
-
-	cp();
-
-	pid = read_pid(pidfilename);
-
-	if(!pid) {
-		if(netname)
-			fprintf(stderr, _("No other tincd is running for net `%s'.\n"),
-					netname);
-		else
-			fprintf(stderr, _("No other tincd is running.\n"));
-		return false;
-	}
-
-	errno = 0;					/* No error, sometimes errno is only changed on error */
-
-	/* ESRCH is returned when no process with that pid is found */
-	if(kill(pid, signal) && errno == ESRCH) {
-		if(netname)
-			fprintf(stderr, _("The tincd for net `%s' is no longer running. "),
-					netname);
-		else
-			fprintf(stderr, _("The tincd is no longer running. "));
-
-		fprintf(stderr, _("Removing stale lock file.\n"));
-		remove_pid(pidfilename);
-	}
-
-	return true;
-#else
-	return remove_service();
-#endif
-}
-
-/*
-  Detach from current terminal, write pidfile, kill parent
+  Detach from current terminal
 */
-bool detach(void)
-{
-	cp();
-
-	setup_signals();
-
-	/* First check if we can open a fresh new pidfile */
+bool detach(void) {
+	logmode_t logmode;
 
 #ifndef HAVE_MINGW
-	if(!write_pidfile())
-		return false;
-
-	/* If we succeeded in doing that, detach */
+	signal(SIGPIPE, SIG_IGN);
+	signal(SIGUSR1, SIG_IGN);
+	signal(SIGUSR2, SIG_IGN);
+	signal(SIGWINCH, SIG_IGN);
 
 	closelogger();
 #endif
 
 	if(do_detach) {
 #ifndef HAVE_MINGW
-		if(daemon(0, 0)) {
-			fprintf(stderr, _("Couldn't detach from terminal: %s"),
-					strerror(errno));
-			return false;
-		}
-
-		/* Now UPDATE the pid in the pidfile, because we changed it... */
-
-		if(!write_pid(pidfilename)) {
-			fprintf(stderr, _("Could not write pid file %s: %s\n"), pidfilename, strerror(errno));
+		if(daemon(1, 0)) {
+			logger(DEBUG_ALWAYS, LOG_ERR, "Couldn't detach from terminal: %s", strerror(errno));
 			return false;
 		}
 #else
 		if(!statushandle)
-			exit(install_service());
-#endif
-	}
-
-	openlogger(identname, use_logfile?LOGMODE_FILE:(do_detach?LOGMODE_SYSLOG:LOGMODE_STDERR));
-
-	logger(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"),
-			   VERSION, __DATE__, __TIME__, debug_level);
-
-	xalloc_fail_func = memory_full;
-
-	return true;
-}
-
-bool execute_script(const char *name, char **envp)
-{
-#ifdef HAVE_SYSTEM
-	int status, len;
-	struct stat s;
-	char *scriptname, *p;
-	int i;
-
-	cp();
-
-#ifndef HAVE_MINGW
-	len = xasprintf(&scriptname, "\"%s/%s\"", confbase, name);
-#else
-	len = xasprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
-#endif
-	if(len < 0)
-		return false;
-
-	scriptname[len - 1] = '\0';
-
-#ifndef HAVE_TUNEMU
-	/* First check if there is a script */
-
-	if(stat(scriptname + 1, &s)) {
-		free(scriptname);
-		return true;
-	}
-#endif
-
-	ifdebug(STATUS) logger(LOG_INFO, _("Executing script %s"), name);
-
-#ifdef HAVE_PUTENV
-	/* Set environment */
-	
-	for(i = 0; envp[i]; i++)
-		putenv(envp[i]);
+			exit(!install_service());
 #endif
-
-	scriptname[len - 1] = '\"';
-	status = system(scriptname);
-
-	free(scriptname);
-
-	/* Unset environment */
-
-	for(i = 0; envp[i]; i++) {
-		char *e = strchr(envp[i], '=');
-		if(e) {
-			p = alloca(e - envp[i] + 1);
-			strncpy(p, envp[i], e - envp[i]);
-			p[e - envp[i]] = '\0';
-			putenv(p);
-		}
 	}
 
-#ifdef WEXITSTATUS
-	if(status != -1) {
-		if(WIFEXITED(status)) {	/* Child exited by itself */
-			if(WEXITSTATUS(status)) {
-				logger(LOG_ERR, _("Script %s exited with non-zero status %d"),
-					   name, WEXITSTATUS(status));
-				return false;
-			}
-		} else if(WIFSIGNALED(status)) {	/* Child was killed by a signal */
-			logger(LOG_ERR, _("Script %s was killed by signal %d (%s)"),
-				   name, WTERMSIG(status), strsignal(WTERMSIG(status)));
-			return false;
-		} else {			/* Something strange happened */
-			logger(LOG_ERR, _("Script %s terminated abnormally"), name);
-			return false;
-		}
-	} else {
-		logger(LOG_ERR, _("System call `%s' failed: %s"), "system", strerror(errno));
-		return false;
-	}
-#endif
-#endif
-	return true;
-}
-
-
-/*
-  Signal handlers.
-*/
-
-#ifndef HAVE_MINGW
-static RETSIGTYPE sigterm_handler(int a)
-{
-	logger(LOG_NOTICE, _("Got %s signal"), "TERM");
-	if(running)
-		running = false;
-	else
-		exit(1);
-}
-
-static RETSIGTYPE sigquit_handler(int a)
-{
-	logger(LOG_NOTICE, _("Got %s signal"), "QUIT");
-	if(running)
-		running = false;
+	if(use_logfile)
+		logmode = LOGMODE_FILE;
+	else if(use_syslog || do_detach)
+		logmode = LOGMODE_SYSLOG;
 	else
-		exit(1);
-}
-
-static RETSIGTYPE fatal_signal_square(int a)
-{
-	logger(LOG_ERR, _("Got another fatal signal %d (%s): not restarting."), a,
-		   strsignal(a));
-	cp_trace();
-	exit(1);
-}
-
-static RETSIGTYPE fatal_signal_handler(int a)
-{
-	struct sigaction act;
-	logger(LOG_ERR, _("Got fatal signal %d (%s)"), a, strsignal(a));
-	cp_trace();
-
-	if(do_detach) {
-		logger(LOG_NOTICE, _("Trying to re-execute in 5 seconds..."));
-
-		act.sa_handler = fatal_signal_square;
-		act.sa_mask = emptysigset;
-		act.sa_flags = 0;
-		sigaction(SIGSEGV, &act, NULL);
-
-		close_network_connections();
-		sleep(5);
-		remove_pid(pidfilename);
-		execvp(g_argv[0], g_argv);
-	} else {
-		logger(LOG_NOTICE, _("Not restarting."));
-		exit(1);
-	}
-}
-
-static RETSIGTYPE sighup_handler(int a)
-{
-	logger(LOG_NOTICE, _("Got %s signal"), "HUP");
-	sighup = true;
-}
-
-static RETSIGTYPE sigint_handler(int a)
-{
-	logger(LOG_NOTICE, _("Got %s signal"), "INT");
-
-	if(saved_debug_level != -1) {
-		logger(LOG_NOTICE, _("Reverting to old debug level (%d)"),
-			saved_debug_level);
-		debug_level = saved_debug_level;
-		saved_debug_level = -1;
-	} else {
-		logger(LOG_NOTICE,
-			_("Temporarily setting debug level to 5.  Kill me with SIGINT again to go back to level %d."),
-			debug_level);
-		saved_debug_level = debug_level;
-		debug_level = 5;
-	}
-}
-
-static RETSIGTYPE sigalrm_handler(int a)
-{
-	logger(LOG_NOTICE, _("Got %s signal"), "ALRM");
-	sigalrm = true;
-}
+		logmode = LOGMODE_STDERR;
 
-static RETSIGTYPE sigusr1_handler(int a)
-{
-	dump_connections();
-}
+	openlogger(identname, logmode);
 
-static RETSIGTYPE sigusr2_handler(int a)
-{
-	dump_device_stats();
-	dump_nodes();
-	dump_edges();
-	dump_subnets();
-}
+	logger(DEBUG_ALWAYS, LOG_NOTICE, "tincd %s (%s %s) starting, debug level %d",
+			   BUILD_VERSION, BUILD_DATE, BUILD_TIME, debug_level);
 
-static RETSIGTYPE sigwinch_handler(int a)
-{
-	do_purge = true;
-}
-
-static RETSIGTYPE unexpected_signal_handler(int a)
-{
-	logger(LOG_WARNING, _("Got unexpected signal %d (%s)"), a, strsignal(a));
-	cp_trace();
-}
-
-static RETSIGTYPE ignore_signal_handler(int a)
-{
-	ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Ignored signal %d (%s)"), a, strsignal(a));
-}
-
-static struct {
-	int signal;
-	void (*handler)(int);
-} sighandlers[] = {
-	{SIGHUP, sighup_handler},
-	{SIGTERM, sigterm_handler},
-	{SIGQUIT, sigquit_handler},
-	{SIGSEGV, fatal_signal_handler},
-	{SIGBUS, fatal_signal_handler},
-	{SIGILL, fatal_signal_handler},
-	{SIGPIPE, ignore_signal_handler},
-	{SIGINT, sigint_handler},
-	{SIGUSR1, sigusr1_handler},
-	{SIGUSR2, sigusr2_handler},
-	{SIGCHLD, ignore_signal_handler},
-	{SIGALRM, sigalrm_handler},
-	{SIGWINCH, sigwinch_handler},
-	{0, NULL}
-};
-#endif
-
-void setup_signals(void)
-{
-#ifndef HAVE_MINGW
-	int i;
-	struct sigaction act;
-
-	sigemptyset(&emptysigset);
-	act.sa_handler = NULL;
-	act.sa_mask = emptysigset;
-	act.sa_flags = 0;
-
-	/* Set a default signal handler for every signal, errors will be
-	   ignored. */
-	for(i = 1; i < NSIG; i++) {
-		if(!do_detach)
-			act.sa_handler = SIG_DFL;
-		else
-			act.sa_handler = unexpected_signal_handler;
-		sigaction(i, &act, NULL);
-	}
-
-	/* If we didn't detach, allow coredumps */
-	if(!do_detach)
-		sighandlers[3].handler = SIG_DFL;
-
-	/* Then, for each known signal that we want to catch, assign a
-	   handler to the signal, with error checking this time. */
-	for(i = 0; sighandlers[i].signal; i++) {
-		act.sa_handler = sighandlers[i].handler;
-		if(sigaction(sighandlers[i].signal, &act, NULL) < 0)
-			fprintf(stderr, _("Installing signal handler for signal %d (%s) failed: %s\n"),
-					sighandlers[i].signal, strsignal(sighandlers[i].signal),
-					strerror(errno));
-	}
-#endif
+	return true;
 }