X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fprocess.c;h=cbc816be5b5667c2100e07f671929cffe7d2c8fc;hb=d4410d0cce40929db9a0ce7042ef962f1867234d;hp=edcd5a00ddad2c878b19531a518ccf497f171d6a;hpb=5eca9520d93bced1275d45e5e2a933d69354cd6d;p=tinc diff --git a/src/process.c b/src/process.c index edcd5a00..cbc816be 100644 --- a/src/process.c +++ b/src/process.c @@ -1,7 +1,7 @@ /* process.c -- process management functions - Copyright (C) 1999-2002 Ivo Timmermans , - 2000-2002 Guus Sliepen + Copyright (C) 1999-2005 Ivo Timmermans, + 2000-2013 Guus Sliepen 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 @@ -13,462 +13,217 @@ 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: process.c,v 1.1.2.49 2002/09/15 14:55:53 guus Exp $ + 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 "config.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include +#include "system.h" #include "conf.h" -#include "process.h" -#include "subnet.h" -#include "device.h" #include "connection.h" +#include "control.h" #include "device.h" - -#include "system.h" +#include "edge.h" +#include "event.h" +#include "logger.h" +#include "names.h" +#include "net.h" +#include "node.h" +#include "process.h" +#include "subnet.h" +#include "utils.h" +#include "xalloc.h" +#include "version.h" /* If zero, don't detach from the terminal. */ -int do_detach = 1; +bool do_detach = true; +bool sigalrm = false; -extern char *identname; -extern char *pidfilename; extern char **g_argv; - -sigset_t emptysigset; - -static int saved_debug_lvl = 0; - -extern int sighup; -extern int sigalrm; -extern int do_purge; - -void memory_full(int size) -{ - syslog(LOG_ERR, _("Memory exhausted (couldn't allocate %d bytes), exitting."), size); - cp_trace(); - exit(1); -} +extern bool use_logfile; +extern bool use_syslog; /* Some functions the less gifted operating systems might lack... */ -#ifndef HAVE_FCLOSEALL -int fcloseall(void) -{ - fflush(stdin); - fflush(stdout); - fflush(stderr); - fclose(stdin); - fclose(stdout); - fclose(stderr); - return 0; -} -#endif - -/* - Close network connections, and terminate neatly -*/ -void cleanup_and_exit(int c) -{ - cp(); - - close_network_connections(); - - if(debug_lvl > DEBUG_NOTHING) - dump_device_stats(); - - syslog(LOG_NOTICE, _("Terminating")); - - closelog(); - exit(c); -} - -/* - check for an existing tinc for this net, and write pid to pidfile -*/ -int write_pidfile(void) -{ - int pid; +#ifdef HAVE_MINGW +static SC_HANDLE manager = NULL; +static SC_HANDLE service = NULL; +static SERVICE_STATUS status = {0}; +static SERVICE_STATUS_HANDLE statushandle = 0; - cp(); +static bool install_service(void) { + char command[4096] = "\""; + SERVICE_DESCRIPTION description = {"Virtual Private Network daemon"}; - pid = check_pid(pidfilename); + manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS); + if(!manager) { + logger(DEBUG_ALWAYS, LOG_ERR, "Could not open service manager: %s", winerror(GetLastError())); + return false; + } - if(pid) { - if(netname) - fprintf(stderr, _("A tincd is already running for net `%s' with pid %d.\n"), - netname, pid); - else - fprintf(stderr, _("A tincd is already running with pid %d.\n"), pid); - return 1; + if(!strchr(program_name, '\\')) { + GetCurrentDirectory(sizeof command - 1, command + 1); + strncat(command, "\\", sizeof command - strlen(command)); } - /* if it's locked, write-protected, or whatever */ - if(!write_pid(pidfilename)) - return 1; + strncat(command, program_name, sizeof command - strlen(command)); - return 0; -} + strncat(command, "\"", sizeof command - strlen(command)); -/* - kill older tincd for this net -*/ -int kill_other(int signal) -{ - int pid; + for(char **argp = g_argv + 1; *argp; argp++) { + char *space = strchr(*argp, ' '); + strncat(command, " ", sizeof command - strlen(command)); - cp(); + if(space) + strncat(command, "\"", sizeof command - strlen(command)); - pid = read_pid(pidfilename); + strncat(command, *argp, sizeof command - strlen(command)); - 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 1; + if(space) + strncat(command, "\"", sizeof command - strlen(command)); } - errno = 0; /* No error, sometimes errno is only changed on error */ + service = CreateService(manager, identname, identname, + SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL, + command, NULL, NULL, NULL, NULL, NULL); - /* 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); + if(!service) { + DWORD lasterror = GetLastError(); + logger(DEBUG_ALWAYS, LOG_ERR, "Could not create %s service: %s", identname, winerror(lasterror)); + if(lasterror != ERROR_SERVICE_EXISTS) + return false; } - return 0; -} - -/* - Detach from current terminal, write pidfile, kill parent -*/ -int detach(void) -{ - cp(); - - setup_signals(); - - /* First check if we can open a fresh new pidfile */ - - if(write_pidfile()) - return -1; - - /* If we succeeded in doing that, detach */ - - closelog(); - - if(do_detach) { - if(daemon(0, 0) < 0) { - fprintf(stderr, _("Couldn't detach from terminal: %s"), - strerror(errno)); - return -1; - } - - /* Now UPDATE the pid in the pidfile, because we changed it... */ - - if(!write_pid(pidfilename)) - return -1; + 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); } - openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON); - - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"), - VERSION, __DATE__, __TIME__, debug_lvl); + if(!StartService(service, 0, NULL)) + logger(DEBUG_ALWAYS, LOG_WARNING, "Could not start %s service: %s", identname, winerror(GetLastError())); else - syslog(LOG_NOTICE, _("tincd %s starting"), VERSION); - - xalloc_fail_func = memory_full; + logger(DEBUG_ALWAYS, LOG_INFO, "%s service started", identname); + + return true; +} + +io_t stop_io; + +DWORD WINAPI controlhandler(DWORD request, DWORD type, LPVOID boe, LPVOID bah) { + switch(request) { + case SERVICE_CONTROL_INTERROGATE: + SetServiceStatus(statushandle, &status); + return NO_ERROR; + case SERVICE_CONTROL_STOP: + logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_STOP"); + break; + case SERVICE_CONTROL_SHUTDOWN: + logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_SHUTDOWN"); + break; + default: + logger(DEBUG_ALWAYS, LOG_WARNING, "Got unexpected request %d", (int)request); + return ERROR_CALL_NOT_IMPLEMENTED; + } - return 0; + status.dwWaitHint = 1000; + status.dwCurrentState = SERVICE_STOP_PENDING; + SetServiceStatus(statushandle, &status); + if (WSASetEvent(stop_io.event) == FALSE) + abort(); + return NO_ERROR; } -/* - Execute the program name, with sane environment. All output will be - redirected to syslog. -*/ -void _execute_script(const char *scriptname, char **envp) - __attribute__ ((noreturn)); -void _execute_script(const char *scriptname, char **envp) -{ - cp(); - - while(*envp) - putenv(*envp++); +VOID WINAPI run_service(DWORD argc, LPTSTR* argv) { + extern int main2(int argc, char **argv); - chdir("/"); + status.dwServiceType = SERVICE_WIN32; + status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN; + status.dwWin32ExitCode = 0; + status.dwServiceSpecificExitCode = 0; + status.dwCheckPoint = 0; - /* Close all file descriptors */ - closelog(); /* <- this means we cannot use syslog() here anymore! */ - fcloseall(); - - execl(scriptname, NULL); - /* No return on success */ - - openlog("tinc", LOG_CONS | LOG_PID, LOG_DAEMON); - syslog(LOG_ERR, _("Could not execute `%s': %s"), scriptname, - strerror(errno)); - exit(errno); -} + statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL); -/* - Fork and execute the program pointed to by name. -*/ -int execute_script(const char *name, char **envp) -{ - pid_t pid; - int status; - struct stat s; - char *scriptname; - - cp(); + if (!statushandle) { + logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "RegisterServiceCtrlHandlerEx", winerror(GetLastError())); + } else { + status.dwWaitHint = 30000; + status.dwCurrentState = SERVICE_START_PENDING; + SetServiceStatus(statushandle, &status); - asprintf(&scriptname, "%s/%s", confbase, name); + status.dwWaitHint = 0; + status.dwCurrentState = SERVICE_RUNNING; + SetServiceStatus(statushandle, &status); - /* First check if there is a script */ + main2(argc, argv); - if(stat(scriptname, &s)) - return 0; + status.dwWaitHint = 0; + status.dwCurrentState = SERVICE_STOPPED; + SetServiceStatus(statushandle, &status); + } - pid = fork(); + return; +} - if(pid < 0) { - syslog(LOG_ERR, _("System call `%s' failed: %s"), "fork", - strerror(errno)); - return -1; - } +bool init_service(void) { + SERVICE_TABLE_ENTRY services[] = { + {identname, run_service}, + {NULL, NULL} + }; - if(pid) { - if(debug_lvl >= DEBUG_STATUS) - syslog(LOG_INFO, _("Executing script %s"), name); - - free(scriptname); - - if(waitpid(pid, &status, 0) == pid) { - if(WIFEXITED(status)) { /* Child exited by itself */ - if(WEXITSTATUS(status)) { - syslog(LOG_ERR, _("Process %d (%s) exited with non-zero status %d"), - pid, name, WEXITSTATUS(status)); - return -1; - } else - return 0; - } else if(WIFSIGNALED(status)) { /* Child was killed by a signal */ - syslog(LOG_ERR, _("Process %d (%s) was killed by signal %d (%s)"), pid, - name, WTERMSIG(status), strsignal(WTERMSIG(status))); - return -1; - } else { /* Something strange happened */ - - syslog(LOG_ERR, _("Process %d (%s) terminated abnormally"), pid, - name); - return -1; - } - } else { - syslog(LOG_ERR, _("System call `%s' failed: %s"), "waitpid", - strerror(errno)); - return -1; + if(!StartServiceCtrlDispatcher(services)) { + if(GetLastError() == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) { + return false; } + else + logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "StartServiceCtrlDispatcher", winerror(GetLastError())); } - /* Child here */ - - _execute_script(scriptname, envp); + return true; } - +#endif /* - Signal handlers. + Detach from current terminal */ +bool detach(void) { + logmode_t logmode; -RETSIGTYPE sigterm_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got TERM signal")); - - cleanup_and_exit(0); -} +#ifndef HAVE_MINGW + signal(SIGPIPE, SIG_IGN); + signal(SIGUSR1, SIG_IGN); + signal(SIGUSR2, SIG_IGN); + signal(SIGWINCH, SIG_IGN); -RETSIGTYPE sigquit_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got QUIT signal")); - cleanup_and_exit(0); -} - -RETSIGTYPE fatal_signal_square(int a) -{ - syslog(LOG_ERR, _("Got another fatal signal %d (%s): not restarting."), a, - strsignal(a)); - cp_trace(); - exit(1); -} - -RETSIGTYPE fatal_signal_handler(int a) -{ - struct sigaction act; - syslog(LOG_ERR, _("Got fatal signal %d (%s)"), a, strsignal(a)); - cp_trace(); + closelogger(); +#endif if(do_detach) { - syslog(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 { - syslog(LOG_NOTICE, _("Not restarting.")); - exit(1); - } -} - -RETSIGTYPE sighup_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got HUP signal")); - sighup = 1; -} - -RETSIGTYPE sigint_handler(int a) -{ - if(saved_debug_lvl) { - syslog(LOG_NOTICE, _("Reverting to old debug level (%d)"), - saved_debug_lvl); - debug_lvl = saved_debug_lvl; - saved_debug_lvl = 0; - } else { - syslog(LOG_NOTICE, _("Temporarily setting debug level to 5. Kill me with SIGINT again to go back to level %d."), - debug_lvl); - saved_debug_lvl = debug_lvl; - debug_lvl = 5; +#ifndef HAVE_MINGW + if(daemon(0, 0)) { + logger(DEBUG_ALWAYS, LOG_ERR, "Couldn't detach from terminal: %s", strerror(errno)); + return false; + } +#else + if(!statushandle) + exit(!install_service()); +#endif } -} - -RETSIGTYPE sigalrm_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got ALRM signal")); - sigalrm = 1; -} -RETSIGTYPE sigusr1_handler(int a) -{ - dump_connections(); -} - -RETSIGTYPE sigusr2_handler(int a) -{ - dump_device_stats(); - dump_nodes(); - dump_edges(); - dump_subnets(); -} - -RETSIGTYPE sigwinch_handler(int a) -{ - extern int do_purge; - do_purge = 1; -} - -RETSIGTYPE unexpected_signal_handler(int a) -{ - syslog(LOG_WARNING, _("Got unexpected signal %d (%s)"), a, strsignal(a)); - cp_trace(); -} + if(use_logfile) + logmode = LOGMODE_FILE; + else if(use_syslog || do_detach) + logmode = LOGMODE_SYSLOG; + else + logmode = LOGMODE_STDERR; -RETSIGTYPE ignore_signal_handler(int a) -{ - if(debug_lvl >= DEBUG_SCARY_THINGS) { - syslog(LOG_DEBUG, _("Ignored signal %d (%s)"), a, strsignal(a)); - cp_trace(); - } -} + openlogger(identname, logmode); -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} -}; - -void setup_signals(void) -{ - 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 = 0; 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)); - } + return true; }