/* process.c -- process management functions Copyright (C) 1999-2005 Ivo Timmermans, 2000-2011 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 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., 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 "logger.h" #include "net.h" #include "node.h" #include "process.h" #include "subnet.h" #include "utils.h" #include "xalloc.h" /* If zero, don't detach from the terminal. */ bool do_detach = true; bool sigalrm = false; extern char *identname; extern char **g_argv; extern bool use_logfile; /* 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; static bool install_service(void) { char command[4096] = "\""; SERVICE_DESCRIPTION description = {"Virtual Private Network daemon"}; 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(!strchr(program_name, '\\')) { GetCurrentDirectory(sizeof command - 1, command + 1); strncat(command, "\\", sizeof command - strlen(command)); } strncat(command, program_name, sizeof command - strlen(command)); strncat(command, "\"", sizeof command - strlen(command)); 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) strncat(command, "\"", sizeof command - strlen(command)); } 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(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(DEBUG_ALWAYS, LOG_INFO, "%s service installed", identname); } else { service = OpenService(manager, identname, SERVICE_ALL_ACCESS); } if(!StartService(service, 0, NULL)) logger(DEBUG_ALWAYS, LOG_WARNING, "Could not start %s service: %s", identname, winerror(GetLastError())); else logger(DEBUG_ALWAYS, LOG_INFO, "%s service started", identname); return true; } 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", request); return ERROR_CALL_NOT_IMPLEMENTED; } event_loopexit(NULL); status.dwWaitHint = 30000; status.dwCurrentState = SERVICE_STOP_PENDING; SetServiceStatus(statushandle, &status); 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.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN; status.dwWin32ExitCode = 0; status.dwServiceSpecificExitCode = 0; status.dwCheckPoint = 0; statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL); if (!statushandle) { logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "RegisterServiceCtrlHandlerEx", winerror(GetLastError())); err = 1; } else { status.dwWaitHint = 30000; status.dwCurrentState = SERVICE_START_PENDING; SetServiceStatus(statushandle, &status); status.dwWaitHint = 0; status.dwCurrentState = SERVICE_RUNNING; SetServiceStatus(statushandle, &status); err = main2(argc, argv); status.dwWaitHint = 0; status.dwCurrentState = SERVICE_STOPPED; //status.dwWin32ExitCode = err; SetServiceStatus(statushandle, &status); } return; } bool init_service(void) { SERVICE_TABLE_ENTRY services[] = { {identname, run_service}, {NULL, NULL} }; 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())); } return true; } #endif /* Detach from current terminal */ bool detach(void) { #ifndef HAVE_MINGW 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)) { 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(DEBUG_ALWAYS, LOG_NOTICE, "tincd %s (%s %s) starting, debug level %d", VERSION, __DATE__, __TIME__, debug_level); return true; } bool execute_script(const char *name, char **envp) { #ifdef HAVE_SYSTEM char *scriptname; char *command; xasprintf(&scriptname, "%s" SLASH "%s%s", confbase, name, scriptextension); /* First check if there is a script */ if(access(scriptname, F_OK)) { free(scriptname); return true; } logger(DEBUG_STATUS, LOG_INFO, "Executing script %s", name); #ifdef HAVE_PUTENV /* Set environment */ for(int i = 0; envp[i]; i++) putenv(envp[i]); #endif if(scriptinterpreter) xasprintf(&command, "%s \"%s\"", scriptinterpreter, scriptname); else xasprintf(&command, "\"%s\"", scriptname); int status = system(command); free(command); free(scriptname); /* Unset environment */ for(int 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(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, LOG_ERR, "Script %s was killed by signal %d (%s)", name, WTERMSIG(status), strsignal(WTERMSIG(status))); return false; } else { /* Something strange happened */ logger(DEBUG_ALWAYS, LOG_ERR, "Script %s terminated abnormally", name); return false; } } else { logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "system", strerror(errno)); return false; } #endif #endif return true; }