Simpler checking of permissions on private RSA key and other fixes.
[tinc] / src / process.c
index 44ecf30..0ec9880 100644 (file)
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: process.c,v 1.1.2.60 2003/07/31 14:24:19 guus Exp $
+    $Id: process.c,v 1.1.2.69 2003/08/08 22:11:54 guus Exp $
 */
 
 #include "system.h"
@@ -43,6 +43,7 @@ extern char *identname;
 extern char *pidfilename;
 extern char **g_argv;
 extern bool use_logfile;
+extern volatile bool running;
 
 sigset_t emptysigset;
 
@@ -70,23 +71,172 @@ static int fcloseall(void)
 }
 #endif
 
-/*
-  Close network connections, and terminate neatly
-*/
-void cleanup_and_exit(int c)
+#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) {
+       char command[4096] = "";
+       char **argp;
+       bool space;
+
+       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), command);
+               strncat(command, "\\", sizeof(command));
+       }
+
+       strncat(command, program_name, 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;
+       }
+
+       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");
+                       running = false;
+                       break;
+               case SERVICE_CONTROL_SHUTDOWN:
+                       logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_SHUTDOWN");
+                       running = false;
+                       break;
+               default:
+                       logger(LOG_WARNING, _("Got unexpected request %d"), request);
+                       return ERROR_CALL_NOT_IMPLEMENTED;
+       }
+
+       if(!running) {
+               status.dwWaitHint = 30000; 
+               status.dwCurrentState = SERVICE_STOP_PENDING; 
+               SetServiceStatus(statushandle, &status);
+       }
+
+       return NO_ERROR;
+}
+
+VOID WINAPI run_service(DWORD argc, LPTSTR* argv)
 {
-       cp();
+       int err = 1;
+       extern int main2(int argc, char **argv);
 
-       close_network_connections();
 
-       ifdebug(CONNECTIONS)
-               dump_device_stats();
+       status.dwServiceType = SERVICE_WIN32; 
+       status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
+       status.dwWin32ExitCode = 0; 
+       status.dwServiceSpecificExitCode = 0; 
+       status.dwCheckPoint = 0; 
 
-       logger(LOG_NOTICE, _("Terminating"));
+       statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL); 
 
-       closelogger();
-       exit(c);
+       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
 /*
@@ -151,9 +301,11 @@ bool kill_other(int signal)
                fprintf(stderr, _("Removing stale lock file.\n"));
                remove_pid(pidfilename);
        }
-#endif
 
        return true;
+#else
+       return remove_service();
+#endif
 }
 
 /*
@@ -170,14 +322,14 @@ bool detach(void)
 #ifndef HAVE_MINGW
        if(!write_pidfile())
                return false;
-#endif
 
        /* If we succeeded in doing that, detach */
 
        closelogger();
+#endif
 
-#ifdef HAVE_FORK
        if(do_detach) {
+#ifndef HAVE_MINGW
                if(daemon(0, 0)) {
                        fprintf(stderr, _("Couldn't detach from terminal: %s"),
                                        strerror(errno));
@@ -188,8 +340,11 @@ bool detach(void)
 
                if(!write_pid(pidfilename))
                        return false;
-       }
+#else
+               if(!statushandle)
+                       exit(install_service());
 #endif
+       }
 
        openlogger(identname, use_logfile?LOGMODE_FILE:(do_detach?LOGMODE_SYSLOG:LOGMODE_STDERR));
 
@@ -201,106 +356,62 @@ bool detach(void)
        return true;
 }
 
-#ifdef HAVE_FORK
-/*
-  Execute the program name, with sane environment.
-*/
-static void _execute_script(const char *scriptname, char **envp)
-       __attribute__ ((__noreturn__));
-static void _execute_script(const char *scriptname, char **envp)
-{
-       int save_errno;
-
-       cp();
-
-       while(*envp)
-               putenv(*envp++);
-
-       chdir("/");
-
-       closelogger();
-
-       /* Close all file descriptors */
-       fcloseall();
-
-       execl(scriptname, scriptname, NULL);
-       /* No return on success */
-
-       save_errno = errno;
-
-       openlogger(identname, use_logfile?LOGMODE_FILE:(do_detach?LOGMODE_SYSLOG:LOGMODE_STDERR));
-       logger(LOG_ERR, _("Could not execute `%s': %s"), scriptname,
-                  strerror(save_errno));
-       exit(save_errno);
-}
-#endif
-
-/*
-  Fork and execute the program pointed to by name.
-*/
 bool execute_script(const char *name, char **envp)
 {
-#ifdef HAVE_FORK
-       pid_t pid;
+#ifdef HAVE_SYSTEM
        int status;
        struct stat s;
        char *scriptname;
 
        cp();
 
-       asprintf(&scriptname, "%s/%s", confbase, name);
+       asprintf(&scriptname, "\"%s/%s\"", confbase, name);
 
+#ifndef HAVE_MINGW
        /* First check if there is a script */
 
        if(stat(scriptname, &s))
                return true;
 
-       pid = fork();
+       ifdebug(STATUS) logger(LOG_INFO, _("Executing script %s"), name);
+#endif
 
-       if(pid < 0) {
-               logger(LOG_ERR, _("System call `%s' failed: %s"), "fork",
-                          strerror(errno));
-               return false;
-       }
+#ifdef HAVE_PUTENV
+       /* Set environment */
+       
+       while(*envp)
+               putenv(*envp++);
+#endif
 
-       if(pid) {
-               ifdebug(STATUS) logger(LOG_INFO, _("Executing script %s"), name);
-
-               free(scriptname);
-
-               if(waitpid(pid, &status, 0) == pid) {
-                       if(WIFEXITED(status)) { /* Child exited by itself */
-                               if(WEXITSTATUS(status)) {
-                                       logger(LOG_ERR, _("Process %d (%s) exited with non-zero status %d"),
-                                                  pid, name, WEXITSTATUS(status));
-                                       return false;
-                               } else
-                                       return true;
-                       } else if(WIFSIGNALED(status)) {        /* Child was killed by a signal */
-                               logger(LOG_ERR, _("Process %d (%s) was killed by signal %d (%s)"), pid,
-                                          name, WTERMSIG(status), strsignal(WTERMSIG(status)));
-                               return false;
-                       } else {                        /* Something strange happened */
-                               logger(LOG_ERR, _("Process %d (%s) terminated abnormally"), pid,
-                                          name);
+       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 (errno != EINTR) {
-                       logger(LOG_ERR, _("System call `%s' failed: %s"), "waitpid",
-                                  strerror(errno));
+               } 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;
                }
-
-               /* Why do we get EINTR? */
-               return true;
+       } else {
+               logger(LOG_ERR, _("System call `%s' failed: %s"), "system", strerror(errno));
+               return false;
        }
-
-       /* Child here */
-
-       _execute_script(scriptname, envp);
-#else
-       return true;
 #endif
+#endif
+       return true;
 }
 
 
@@ -311,15 +422,14 @@ bool execute_script(const char *name, char **envp)
 #ifndef HAVE_MINGW
 static RETSIGTYPE sigterm_handler(int a)
 {
-       logger(LOG_NOTICE, _("Got TERM signal"));
-
-       cleanup_and_exit(0);
+       logger(LOG_NOTICE, _("Got %s signal"), "TERM");
+       running = false;
 }
 
 static RETSIGTYPE sigquit_handler(int a)
 {
-       logger(LOG_NOTICE, _("Got QUIT signal"));
-       cleanup_and_exit(0);
+       logger(LOG_NOTICE, _("Got %s signal"), "QUIT");
+       running = false;
 }
 
 static RETSIGTYPE fatal_signal_square(int a)
@@ -356,12 +466,14 @@ static RETSIGTYPE fatal_signal_handler(int a)
 
 static RETSIGTYPE sighup_handler(int a)
 {
-       logger(LOG_NOTICE, _("Got HUP signal"));
+       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);
@@ -378,7 +490,7 @@ static RETSIGTYPE sigint_handler(int a)
 
 static RETSIGTYPE sigalrm_handler(int a)
 {
-       logger(LOG_NOTICE, _("Got ALRM signal"));
+       logger(LOG_NOTICE, _("Got %s signal"), "ALRM");
        sigalrm = true;
 }