/*
process.c -- process management functions
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2011 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
#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;
-
-#ifndef HAVE_MINGW
-static sigset_t emptysigset;
-#endif
-
-static int saved_debug_level = -1;
-
-static void memory_full(int size) {
- logger(LOG_ERR, "Memory exhausted (couldn't allocate %d bytes), exitting.", size);
- 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;
}
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)
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) {
DWORD lasterror = GetLastError();
- logger(LOG_ERR, "Could not create %s service: %s", identname, winerror(lasterror));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not create %s service: %s", identname, winerror(lasterror));
if(lasterror != ERROR_SERVICE_EXISTS)
return false;
}
if(service) {
ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &description);
- logger(LOG_INFO, "%s service installed", identname);
+ 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) {
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;
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);
}
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;
-
- 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;
#endif
/*
- kill older tincd for this net
-*/
-bool kill_other(int signal) {
-#ifndef HAVE_MINGW
- pid_t pid;
-
- 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) {
- setup_signals();
-
- /* First check if we can open a fresh new pidfile */
+ 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));
+ 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;
- char *scriptname;
- int i;
-
-#ifndef HAVE_MINGW
- len = xasprintf(&scriptname, "\"%s/%s\"", confbase, name);
-#else
- len = xasprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
+ exit(!install_service());
#endif
- if(len < 0)
- return false;
-
- scriptname[len - 1] = '\0';
-
-#ifndef HAVE_TUNEMU
- /* First check if there is a script */
-
- if(access(scriptname + 1, F_OK)) {
- 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]);
-#endif
-
- scriptname[len - 1] = '\"';
- status = system(scriptname);
-
- free(scriptname);
-
- /* Unset environment */
-
- for(i = 0; envp[i]; i++) {
- char *e = strchr(envp[i], '=');
- if(e) {
- char p[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));
- exit(1);
-}
-
-static RETSIGTYPE fatal_signal_handler(int a) {
- struct sigaction act;
- logger(LOG_ERR, "Got fatal signal %d (%s)", a, strsignal(a));
-
- 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;
-}
-
-static RETSIGTYPE sigusr1_handler(int a) {
- dump_connections();
-}
-
-static RETSIGTYPE sigusr2_handler(int a) {
- dump_device_stats();
- dump_nodes();
- dump_edges();
- dump_subnets();
-}
-
-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));
-}
+ logmode = LOGMODE_STDERR;
-static RETSIGTYPE ignore_signal_handler(int a) {
- ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Ignored signal %d (%s)", a, strsignal(a));
-}
+ openlogger(identname, logmode);
-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},
- {SIGABRT, SIG_DFL},
- {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);
- }
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "tincd %s (%s %s) starting, debug level %d",
+ BUILD_VERSION, BUILD_DATE, BUILD_TIME, debug_level);
- /* 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;
}
projects / tinc / blobdiff