--- /dev/null
+/*
+ process.c -- process management functions
+ Copyright (C) 1999-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
+ 2000-2004 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
+ 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.
+
+ $Id$
+*/
+
+#include "system.h"
+
+#include "tincd.h"
+#include "logger/logger.h"
+
+static sigset_t emptysigset;
+
+/* Some functions the less gifted operating systems might lack... */
+
+#ifdef HAVE_MINGW
+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) {
+ 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()));
+ return false;
+ }
+
+ if(!strchr(program_name, '\\')) {
+ GetCurrentDirectory(sizeof(command) - 1, command + 1);
+ strncat(command, "\\", sizeof(command));
+ }
+
+ strncat(command, program_name, sizeof(command));
+
+ strncat(command, "\"", sizeof(command));
+
+ for(argp = g_argv + 1; *argp; argp++) {
+ space = strchr(*argp, ' ');
+ strncat(command, " ", sizeof(command));
+
+ if(space)
+ strncat(command, "\"", sizeof(command));
+
+ strncat(command, *argp, sizeof(command));
+
+ if(space)
+ strncat(command, "\"", sizeof(command));
+ }
+
+ service = CreateService(manager, identname, identname,
+ SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL,
+ command, "NDIS", NULL, NULL, NULL, NULL);
+
+ if(!service) {
+ logger(LOG_ERR, _("Could not create %s service: %s"), identname, winerror(GetLastError()));
+ return false;
+ }
+
+ ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &description);
+
+ logger(LOG_INFO, _("%s service installed"), identname);
+
+ if(!StartService(service, 0, NULL))
+ logger(LOG_WARNING, _("Could not start %s service: %s"), identname, winerror(GetLastError()));
+ else
+ logger(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;
+}
+
+DWORD WINAPI controlhandler(DWORD request, DWORD type, LPVOID boe, LPVOID bah) {
+ switch(request) {
+ case SERVICE_CONTROL_STOP:
+ logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_STOP");
+ break;
+ case SERVICE_CONTROL_SHUTDOWN:
+ logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_SHUTDOWN");
+ break;
+ default:
+ logger(LOG_WARNING, _("Got unexpected request %d"), 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);
+ }
+
+}
+
+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(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(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 pid_t read_pid(const char *pidfilename) {
+ FILE *pidfile;
+ long int pid = 0;
+
+ pidfile = fopen(pidfilename, "r");
+ if(!pidfile)
+ return 0;
+
+ fscanf(pidfile, "%ld", &pid);
+ fclose(pidfile);
+
+ return pid;
+}
+
+static pid_t check_pid(const char *pidfilename) {
+ pid_t pid;
+
+ pid = read_pid(pidfilename);
+
+ if (!pid || pid == getpid())
+ return 0;
+
+ if(kill(pid, 0) && errno == ESRCH)
+ return 0;
+
+ return pid;
+}
+
+static pid_t write_pid(const char *pidfilename) {
+ FILE *pidfile;
+ int pidfd;
+ pid_t pid;
+
+ pidfd = open(pidfilename, O_RDWR | O_CREAT);
+
+ if(pidfd == -1)
+ return 0;
+
+#ifdef HAVE_FLOCK
+ if(flock(pidfd, LOCK_EX | LOCK_NB) == -1) {
+ close(pidfd);
+ return 0;
+ }
+#endif
+
+ pidfile = fdopen(pidfd, "r+");
+
+ if(!pidfile) {
+ close(pidfd);
+ return 0;
+ }
+
+ pid = getpid();
+ fprintf(pidfile, "%ld\n", (long)pid);
+ fflush(pidfile);
+
+#ifdef HAVE_FLOCK
+ flock(pidfd, LOCK_UN);
+#endif
+
+ close(pidfd);
+
+ return pid;
+}
+
+bool remove_pid(const char *pidfilename) {
+ return unlink(pidfilename) == 0;
+}
+
+static bool write_pidfile(void)
+{
+ pid_t pid;
+
+ pid = check_pid(tinc_pidfilename);
+
+ if(pid) {
+ if(tinc_netname)
+ fprintf(stderr, _("A tincd is already running for net `%s' with pid %ld.\n"),
+ tinc_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(tinc_pidfilename)) {
+ fprintf(stderr, _("Could write pid file %s: %s\n"), tinc_pidfilename, strerror(errno));
+ return false;
+ }
+
+ return true;
+}
+#endif
+
+/*
+ kill older tincd for this net
+*/
+bool kill_other(int signal)
+{
+#ifndef HAVE_MINGW
+ pid_t pid;
+
+ pid = read_pid(tinc_pidfilename);
+
+ if(!pid) {
+ if(tinc_netname)
+ fprintf(stderr, _("No other tincd is running for net `%s'.\n"),
+ tinc_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(tinc_netname)
+ fprintf(stderr, _("The tincd for net `%s' is no longer running. "),
+ tinc_netname);
+ else
+ fprintf(stderr, _("The tincd is no longer running. "));
+
+ fprintf(stderr, _("Removing stale lock file.\n"));
+ remove_pid(tinc_pidfilename);
+ }
+
+ return true;
+#else
+ return remove_service();
+#endif
+}
+
+/*
+ Detach from current terminal, write pidfile, kill parent
+*/
+bool detach(void) {
+#ifndef HAVE_MINGW
+ if(!write_pidfile())
+ return false;
+
+ /* If we succeeded in doing that, detach */
+
+ logger_exit();
+
+ 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(tinc_pidfilename)) {
+ fprintf(stderr, _("Could not write pid file %s: %s\n"), tinc_pidfilename, strerror(errno));
+ return false;
+ }
+#else
+ if(!statushandle)
+ exit(install_service());
+#endif
+
+ logger_init(tinc_identname, tinc_use_logfile ? LOGGER_MODE_FILE : LOGGER_MODE_SYSLOG);
+
+ return true;
+}
+
+bool execute_script(const char *name, char **envp)
+{
+#ifdef HAVE_SYSTEM
+ int status, len;
+ struct stat s;
+ char *scriptname;
+
+#ifndef HAVE_MINGW
+ len = asprintf(&scriptname, "\"%s/%s\"", tinc_confbase, name);
+#else
+ len = asprintf(&scriptname, "\"%s/%s.bat\"", tinc_confbase, name);
+#endif
+ if(len < 0)
+ return false;
+
+ scriptname[len - 1] = '\0';
+
+ /* First check if there is a script */
+
+ if(stat(scriptname + 1, &s))
+ return true;
+
+ logger(LOG_INFO, _("Executing script %s"), name);
+
+#ifdef HAVE_PUTENV
+ /* Set environment */
+
+ while(*envp)
+ putenv(*envp++);
+#endif
+
+ scriptname[len - 1] = '\"';
+ status = system(scriptname);
+
+ free(scriptname);
+
+ /* Unset environment? */
+
+#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");
+ exit(1);
+}
+
+static RETSIGTYPE sigquit_handler(int a) {
+ logger(LOG_NOTICE, _("Got %s signal"), "QUIT");
+ 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));
+ 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) {
+ static logger_level_t saved_logger_level = -1;
+
+ logger(LOG_NOTICE, _("Got %s signal"), "INT");
+
+ if(saved_logger_level != -1) {
+ logger(LOG_NOTICE, _("Reverting to old debug level (%d)"),
+ saved_logger_level);
+ logger_level = saved_logger_level;
+ saved_logger_level = -1;
+ } else {
+ logger(LOG_NOTICE,
+ _("Temporarily setting debug level to 5. Kill me with SIGINT again to go back to level %d."),
+ logger_level);
+ saved_logger_level = logger_level;
+ logger_level = 5;
+ }
+}
+
+static RETSIGTYPE sigalrm_handler(int a) {
+ logger(LOG_NOTICE, _("Got %s signal"), "ALRM");
+ //sigalrm = true;
+}
+
+static RETSIGTYPE sigusr1_handler(int a) {
+}
+
+static RETSIGTYPE sigusr2_handler(int a) {
+}
+
+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));
+}
+
+static RETSIGTYPE ignore_signal_handler(int a) {
+ 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, SIG_DFL},
+ {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 = 0; i < NSIG; i++) {
+ act.sa_handler = unexpected_signal_handler;
+ sigaction(i, &act, NULL);
+ }
+
+ /* 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
+}
projects / tinc / blobdiff