2000-11-16 17:54:29 +00:00
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/*
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process.c -- process management functions
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2003-07-12 17:41:48 +00:00
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Copyright (C) 1999-2003 Ivo Timmermans <ivo@o2w.nl>,
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2000-2003 Guus Sliepen <guus@sliepen.eu.org>
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2000-11-16 17:54:29 +00:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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2003-11-27 23:24:59 +00:00
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$Id: process.c,v 1.1.2.77 2003/11/27 23:24:59 guus Exp $
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2000-11-16 17:54:29 +00:00
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*/
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2003-07-17 15:06:27 +00:00
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#include "system.h"
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2000-11-16 22:12:23 +00:00
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#include "conf.h"
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2000-11-22 22:18:03 +00:00
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#include "connection.h"
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2001-10-31 12:50:24 +00:00
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#include "device.h"
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2003-07-17 15:06:27 +00:00
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#include "edge.h"
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2003-07-06 22:11:37 +00:00
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#include "logger.h"
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2003-07-17 15:06:27 +00:00
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#include "node.h"
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#include "pidfile.h"
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#include "process.h"
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#include "subnet.h"
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#include "utils.h"
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#include "xalloc.h"
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2000-11-16 17:54:29 +00:00
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/* If zero, don't detach from the terminal. */
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2003-07-22 20:55:21 +00:00
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bool do_detach = true;
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bool sighup = false;
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bool sigalrm = false;
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2000-11-16 17:54:29 +00:00
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2000-11-16 22:12:23 +00:00
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extern char *identname;
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extern char *pidfilename;
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extern char **g_argv;
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2003-07-22 20:55:21 +00:00
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extern bool use_logfile;
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2003-08-02 20:50:38 +00:00
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extern volatile bool running;
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2000-11-16 22:12:23 +00:00
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2000-11-28 08:59:27 +00:00
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sigset_t emptysigset;
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2003-07-06 22:11:37 +00:00
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static int saved_debug_level = -1;
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2001-09-05 18:38:09 +00:00
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2003-07-06 23:16:29 +00:00
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static void memory_full(int size)
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2000-11-16 22:12:23 +00:00
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{
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2003-07-12 17:41:48 +00:00
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logger(LOG_ERR, _("Memory exhausted (couldn't allocate %d bytes), exitting."), size);
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2002-09-09 21:25:28 +00:00
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cp_trace();
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exit(1);
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2000-11-16 22:12:23 +00:00
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}
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2000-11-22 22:05:37 +00:00
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/* Some functions the less gifted operating systems might lack... */
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2003-08-02 20:50:38 +00:00
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#ifdef HAVE_MINGW
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extern char *identname;
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extern char *program_name;
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extern char **g_argv;
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static SC_HANDLE manager = NULL;
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static SC_HANDLE service = NULL;
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static SERVICE_STATUS status = {0};
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static SERVICE_STATUS_HANDLE statushandle = 0;
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bool install_service(void) {
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2003-08-22 15:05:01 +00:00
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char command[4096] = "\"";
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2003-08-02 20:50:38 +00:00
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char **argp;
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2003-08-08 17:17:13 +00:00
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bool space;
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2003-08-10 13:35:05 +00:00
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SERVICE_DESCRIPTION description = {"Virtual Private Network daemon"};
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2003-08-02 20:50:38 +00:00
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manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
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if(!manager) {
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logger(LOG_ERR, _("Could not open service manager: %s"), winerror(GetLastError()));
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return false;
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}
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if(!strchr(program_name, '\\')) {
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2003-08-22 15:05:01 +00:00
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GetCurrentDirectory(sizeof(command) - 1, command + 1);
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2003-08-02 20:50:38 +00:00
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strncat(command, "\\", sizeof(command));
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}
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strncat(command, program_name, sizeof(command));
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2003-08-16 12:11:11 +00:00
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strncat(command, "\"", sizeof(command));
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2003-08-02 20:50:38 +00:00
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for(argp = g_argv + 1; *argp; argp++) {
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2003-08-08 19:43:47 +00:00
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space = strchr(*argp, ' ');
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2003-08-08 19:56:11 +00:00
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strncat(command, " ", sizeof(command));
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if(space)
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strncat(command, "\"", sizeof(command));
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2003-08-02 20:50:38 +00:00
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strncat(command, *argp, sizeof(command));
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2003-08-08 19:56:11 +00:00
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2003-08-08 17:17:13 +00:00
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if(space)
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strncat(command, "\"", sizeof(command));
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2003-08-02 20:50:38 +00:00
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}
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service = CreateService(manager, identname, identname,
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SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL,
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command, "NDIS", NULL, NULL, NULL, NULL);
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if(!service) {
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logger(LOG_ERR, _("Could not create %s service: %s"), identname, winerror(GetLastError()));
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return false;
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}
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2003-08-10 13:35:05 +00:00
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ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &description);
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2003-08-02 20:50:38 +00:00
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logger(LOG_INFO, _("%s service installed"), identname);
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if(!StartService(service, 0, NULL))
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logger(LOG_WARNING, _("Could not start %s service: %s"), identname, winerror(GetLastError()));
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else
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logger(LOG_INFO, _("%s service started"), identname);
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return true;
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}
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bool remove_service(void) {
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manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
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if(!manager) {
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logger(LOG_ERR, _("Could not open service manager: %s"), winerror(GetLastError()));
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return false;
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}
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service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
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if(!service) {
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logger(LOG_ERR, _("Could not open %s service: %s"), identname, winerror(GetLastError()));
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return false;
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}
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if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
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logger(LOG_ERR, _("Could not stop %s service: %s"), identname, winerror(GetLastError()));
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else
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logger(LOG_INFO, _("%s service stopped"), identname);
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if(!DeleteService(service)) {
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logger(LOG_ERR, _("Could not remove %s service: %s"), identname, winerror(GetLastError()));
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return false;
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}
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logger(LOG_INFO, _("%s service removed"), identname);
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return true;
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}
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DWORD WINAPI controlhandler(DWORD request, DWORD type, LPVOID boe, LPVOID bah) {
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switch(request) {
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case SERVICE_CONTROL_STOP:
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logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_STOP");
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break;
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case SERVICE_CONTROL_SHUTDOWN:
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logger(LOG_NOTICE, _("Got %s request"), "SERVICE_CONTROL_SHUTDOWN");
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break;
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default:
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logger(LOG_WARNING, _("Got unexpected request %d"), request);
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return ERROR_CALL_NOT_IMPLEMENTED;
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}
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2003-08-17 12:05:08 +00:00
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if(running) {
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running = false;
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2003-08-08 12:55:05 +00:00
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status.dwWaitHint = 30000;
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2003-08-03 12:38:18 +00:00
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status.dwCurrentState = SERVICE_STOP_PENDING;
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SetServiceStatus(statushandle, &status);
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2003-08-17 12:05:08 +00:00
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return NO_ERROR;
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} else {
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status.dwWaitHint = 0;
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status.dwCurrentState = SERVICE_STOPPED;
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SetServiceStatus(statushandle, &status);
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exit(1);
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2003-08-03 12:38:18 +00:00
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}
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2003-08-02 20:50:38 +00:00
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}
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VOID WINAPI run_service(DWORD argc, LPTSTR* argv)
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2000-11-16 22:12:23 +00:00
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{
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2003-08-02 20:50:38 +00:00
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int err = 1;
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extern int main2(int argc, char **argv);
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2000-11-16 22:12:23 +00:00
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2003-08-02 20:50:38 +00:00
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status.dwServiceType = SERVICE_WIN32;
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status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
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status.dwWin32ExitCode = 0;
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status.dwServiceSpecificExitCode = 0;
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status.dwCheckPoint = 0;
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2000-11-24 23:13:07 +00:00
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2003-08-02 20:50:38 +00:00
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statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL);
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2002-09-09 21:25:28 +00:00
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2003-08-02 20:50:38 +00:00
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if (!statushandle) {
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logger(LOG_ERR, _("System call `%s' failed: %s"), "RegisterServiceCtrlHandlerEx", winerror(GetLastError()));
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err = 1;
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} else {
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2003-08-08 12:55:05 +00:00
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status.dwWaitHint = 30000;
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2003-08-03 12:38:18 +00:00
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status.dwCurrentState = SERVICE_START_PENDING;
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SetServiceStatus(statushandle, &status);
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2003-08-08 12:55:05 +00:00
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status.dwWaitHint = 0;
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2003-08-03 12:38:18 +00:00
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status.dwCurrentState = SERVICE_RUNNING;
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2003-08-02 20:50:38 +00:00
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SetServiceStatus(statushandle, &status);
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err = main2(argc, argv);
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2003-08-08 12:55:05 +00:00
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status.dwWaitHint = 0;
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2003-08-02 20:50:38 +00:00
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status.dwCurrentState = SERVICE_STOPPED;
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2003-08-03 12:38:18 +00:00
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//status.dwWin32ExitCode = err;
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2003-08-02 20:50:38 +00:00
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SetServiceStatus(statushandle, &status);
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}
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return;
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}
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bool init_service(void) {
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SERVICE_TABLE_ENTRY services[] = {
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{identname, run_service},
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{NULL, NULL}
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};
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if(!StartServiceCtrlDispatcher(services)) {
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if(GetLastError() == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) {
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return false;
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}
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else
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logger(LOG_ERR, _("System call `%s' failed: %s"), "StartServiceCtrlDispatcher", winerror(GetLastError()));
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}
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return true;
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2000-11-16 22:12:23 +00:00
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}
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2003-08-02 20:50:38 +00:00
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#endif
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2000-11-16 22:12:23 +00:00
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2003-07-28 22:06:09 +00:00
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#ifndef HAVE_MINGW
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2000-11-16 22:12:23 +00:00
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/*
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check for an existing tinc for this net, and write pid to pidfile
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*/
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2003-07-22 20:55:21 +00:00
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static bool write_pidfile(void)
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2000-11-16 22:12:23 +00:00
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{
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2003-10-06 16:13:08 +00:00
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pid_t pid;
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2002-09-09 21:25:28 +00:00
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cp();
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pid = check_pid(pidfilename);
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if(pid) {
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if(netname)
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2003-10-06 16:13:08 +00:00
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fprintf(stderr, _("A tincd is already running for net `%s' with pid %ld.\n"),
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netname, (long)pid);
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2002-09-09 21:25:28 +00:00
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else
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2003-10-06 16:13:08 +00:00
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fprintf(stderr, _("A tincd is already running with pid %ld.\n"), (long)pid);
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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/* if it's locked, write-protected, or whatever */
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2003-11-27 23:24:59 +00:00
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if(!write_pid(pidfilename)) {
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fprintf(stderr, _("Could write pid file %s: %s\n"), pidfilename, strerror(errno));
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2003-07-22 20:55:21 +00:00
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return false;
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2003-11-27 23:24:59 +00:00
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}
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2002-09-09 21:25:28 +00:00
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2003-07-22 20:55:21 +00:00
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return true;
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2000-11-16 22:12:23 +00:00
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}
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2003-07-28 22:06:09 +00:00
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#endif
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2000-11-16 22:12:23 +00:00
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/*
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kill older tincd for this net
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*/
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2003-07-22 20:55:21 +00:00
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bool kill_other(int signal)
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2000-11-16 22:12:23 +00:00
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{
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2003-07-28 22:06:09 +00:00
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#ifndef HAVE_MINGW
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2003-10-06 16:13:08 +00:00
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pid_t pid;
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2002-09-09 21:25:28 +00:00
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cp();
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pid = read_pid(pidfilename);
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if(!pid) {
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if(netname)
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fprintf(stderr, _("No other tincd is running for net `%s'.\n"),
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netname);
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else
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fprintf(stderr, _("No other tincd is running.\n"));
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2003-07-22 20:55:21 +00:00
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return false;
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2002-09-09 21:25:28 +00:00
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}
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errno = 0; /* No error, sometimes errno is only changed on error */
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/* ESRCH is returned when no process with that pid is found */
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if(kill(pid, signal) && errno == ESRCH) {
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if(netname)
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fprintf(stderr, _("The tincd for net `%s' is no longer running. "),
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netname);
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else
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fprintf(stderr, _("The tincd is no longer running. "));
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fprintf(stderr, _("Removing stale lock file.\n"));
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remove_pid(pidfilename);
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}
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2003-07-22 20:55:21 +00:00
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return true;
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2003-08-02 20:50:38 +00:00
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#else
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return remove_service();
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#endif
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2000-11-16 22:12:23 +00:00
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}
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2000-11-16 17:54:29 +00:00
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/*
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Detach from current terminal, write pidfile, kill parent
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*/
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2003-07-22 20:55:21 +00:00
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bool detach(void)
|
2000-11-16 17:54:29 +00:00
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{
|
2002-09-09 21:25:28 +00:00
|
|
|
cp();
|
2000-11-16 22:12:23 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
setup_signals();
|
2000-11-22 19:14:09 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* First check if we can open a fresh new pidfile */
|
2000-11-25 13:33:33 +00:00
|
|
|
|
2003-07-28 22:06:09 +00:00
|
|
|
#ifndef HAVE_MINGW
|
2003-07-22 20:55:21 +00:00
|
|
|
if(!write_pidfile())
|
|
|
|
return false;
|
2001-01-05 23:53:53 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* If we succeeded in doing that, detach */
|
|
|
|
|
2003-07-21 14:47:43 +00:00
|
|
|
closelogger();
|
2003-08-02 20:50:38 +00:00
|
|
|
#endif
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
if(do_detach) {
|
2003-08-02 20:50:38 +00:00
|
|
|
#ifndef HAVE_MINGW
|
2003-07-22 20:55:21 +00:00
|
|
|
if(daemon(0, 0)) {
|
2002-09-09 21:25:28 +00:00
|
|
|
fprintf(stderr, _("Couldn't detach from terminal: %s"),
|
|
|
|
strerror(errno));
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Now UPDATE the pid in the pidfile, because we changed it... */
|
|
|
|
|
2003-11-27 23:24:59 +00:00
|
|
|
if(!write_pid(pidfilename)) {
|
|
|
|
fprintf(stderr, _("Could not write pidfile %s: %s\n"), pidfilename, strerror(errno));
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2003-11-27 23:24:59 +00:00
|
|
|
}
|
2003-08-02 20:50:38 +00:00
|
|
|
#else
|
|
|
|
if(!statushandle)
|
|
|
|
exit(install_service());
|
2003-07-28 22:06:09 +00:00
|
|
|
#endif
|
2003-08-02 20:50:38 +00:00
|
|
|
}
|
2000-11-25 13:33:33 +00:00
|
|
|
|
2003-07-06 22:11:37 +00:00
|
|
|
openlogger(identname, use_logfile?LOGMODE_FILE:(do_detach?LOGMODE_SYSLOG:LOGMODE_STDERR));
|
2002-09-09 21:25:28 +00:00
|
|
|
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"),
|
2003-07-06 22:11:37 +00:00
|
|
|
VERSION, __DATE__, __TIME__, debug_level);
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
xalloc_fail_func = memory_full;
|
|
|
|
|
2003-07-22 20:55:21 +00:00
|
|
|
return true;
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-22 20:55:21 +00:00
|
|
|
bool execute_script(const char *name, char **envp)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-08-08 14:48:33 +00:00
|
|
|
#ifdef HAVE_SYSTEM
|
2003-08-16 12:11:11 +00:00
|
|
|
int status, len;
|
2002-09-09 21:25:28 +00:00
|
|
|
struct stat s;
|
|
|
|
char *scriptname;
|
|
|
|
|
|
|
|
cp();
|
|
|
|
|
2003-08-08 19:43:47 +00:00
|
|
|
#ifndef HAVE_MINGW
|
2003-08-16 12:11:11 +00:00
|
|
|
len = asprintf(&scriptname, "\"%s/%s\"", confbase, name);
|
|
|
|
#else
|
|
|
|
len = asprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
|
|
|
|
#endif
|
|
|
|
if(len < 0)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
scriptname[len - 1] = '\0';
|
2003-08-08 22:45:46 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
/* First check if there is a script */
|
|
|
|
|
2003-08-16 12:11:11 +00:00
|
|
|
if(stat(scriptname + 1, &s))
|
2003-07-22 20:55:21 +00:00
|
|
|
return true;
|
2002-09-09 21:25:28 +00:00
|
|
|
|
2003-08-08 19:43:47 +00:00
|
|
|
ifdebug(STATUS) logger(LOG_INFO, _("Executing script %s"), name);
|
2003-08-08 22:45:46 +00:00
|
|
|
|
2003-08-08 19:56:11 +00:00
|
|
|
#ifdef HAVE_PUTENV
|
2003-08-08 14:48:33 +00:00
|
|
|
/* Set environment */
|
|
|
|
|
|
|
|
while(*envp)
|
|
|
|
putenv(*envp++);
|
2003-08-08 19:56:11 +00:00
|
|
|
#endif
|
2002-09-09 21:25:28 +00:00
|
|
|
|
2003-08-16 12:11:11 +00:00
|
|
|
scriptname[len - 1] = '\"';
|
2003-08-08 14:48:33 +00:00
|
|
|
status = system(scriptname);
|
|
|
|
|
|
|
|
free(scriptname);
|
|
|
|
|
|
|
|
/* Unset environment? */
|
|
|
|
|
2003-08-08 19:43:47 +00:00
|
|
|
#ifdef WEXITSTATUS
|
2003-08-08 14:48:33 +00:00
|
|
|
if(status != -1) {
|
|
|
|
if(WIFEXITED(status)) { /* Child exited by itself */
|
|
|
|
if(WEXITSTATUS(status)) {
|
2003-08-08 22:11:54 +00:00
|
|
|
logger(LOG_ERR, _("Script %s exited with non-zero status %d"),
|
|
|
|
name, WEXITSTATUS(status));
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
2003-08-08 14:48:33 +00:00
|
|
|
} else if(WIFSIGNALED(status)) { /* Child was killed by a signal */
|
2003-08-08 22:11:54 +00:00
|
|
|
logger(LOG_ERR, _("Script %s was killed by signal %d (%s)"),
|
2003-08-08 14:48:33 +00:00
|
|
|
name, WTERMSIG(status), strsignal(WTERMSIG(status)));
|
|
|
|
return false;
|
|
|
|
} else { /* Something strange happened */
|
2003-08-08 22:11:54 +00:00
|
|
|
logger(LOG_ERR, _("Script %s terminated abnormally"), name);
|
2003-07-22 20:55:21 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
2003-08-08 14:48:33 +00:00
|
|
|
} else {
|
2003-08-08 22:11:54 +00:00
|
|
|
logger(LOG_ERR, _("System call `%s' failed: %s"), "system", strerror(errno));
|
2003-08-08 14:48:33 +00:00
|
|
|
return false;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
2003-08-08 19:43:47 +00:00
|
|
|
#endif
|
2003-07-28 22:06:09 +00:00
|
|
|
#endif
|
2003-08-08 14:48:33 +00:00
|
|
|
return true;
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2000-11-26 22:42:34 +00:00
|
|
|
|
2000-11-16 17:54:29 +00:00
|
|
|
/*
|
|
|
|
Signal handlers.
|
|
|
|
*/
|
|
|
|
|
2003-07-28 22:06:09 +00:00
|
|
|
#ifndef HAVE_MINGW
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sigterm_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-08-03 21:45:13 +00:00
|
|
|
logger(LOG_NOTICE, _("Got %s signal"), "TERM");
|
2003-08-02 20:50:38 +00:00
|
|
|
running = false;
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sigquit_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-08-03 21:45:13 +00:00
|
|
|
logger(LOG_NOTICE, _("Got %s signal"), "QUIT");
|
2003-08-02 20:50:38 +00:00
|
|
|
running = false;
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE fatal_signal_square(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_ERR, _("Got another fatal signal %d (%s): not restarting."), a,
|
2002-09-09 21:25:28 +00:00
|
|
|
strsignal(a));
|
|
|
|
cp_trace();
|
|
|
|
exit(1);
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE fatal_signal_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2002-09-09 21:25:28 +00:00
|
|
|
struct sigaction act;
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_ERR, _("Got fatal signal %d (%s)"), a, strsignal(a));
|
2002-09-09 21:25:28 +00:00
|
|
|
cp_trace();
|
|
|
|
|
|
|
|
if(do_detach) {
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_NOTICE, _("Trying to re-execute in 5 seconds..."));
|
2002-09-09 21:25:28 +00:00
|
|
|
|
|
|
|
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 {
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_NOTICE, _("Not restarting."));
|
2002-09-09 21:25:28 +00:00
|
|
|
exit(1);
|
|
|
|
}
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sighup_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-08-03 21:45:13 +00:00
|
|
|
logger(LOG_NOTICE, _("Got %s signal"), "HUP");
|
2003-07-22 20:55:21 +00:00
|
|
|
sighup = true;
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sigint_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-08-03 21:45:13 +00:00
|
|
|
logger(LOG_NOTICE, _("Got %s signal"), "INT");
|
|
|
|
|
2003-07-06 22:11:37 +00:00
|
|
|
if(saved_debug_level != -1) {
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_NOTICE, _("Reverting to old debug level (%d)"),
|
2003-07-06 22:11:37 +00:00
|
|
|
saved_debug_level);
|
|
|
|
debug_level = saved_debug_level;
|
|
|
|
saved_debug_level = -1;
|
2002-09-09 21:25:28 +00:00
|
|
|
} else {
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_NOTICE,
|
2003-07-06 22:11:37 +00:00
|
|
|
_("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;
|
2002-09-09 21:25:28 +00:00
|
|
|
}
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sigalrm_handler(int a)
|
2002-02-10 21:57:54 +00:00
|
|
|
{
|
2003-08-03 21:45:13 +00:00
|
|
|
logger(LOG_NOTICE, _("Got %s signal"), "ALRM");
|
2003-07-22 20:55:21 +00:00
|
|
|
sigalrm = true;
|
2002-02-10 21:57:54 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sigusr1_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2002-09-09 21:25:28 +00:00
|
|
|
dump_connections();
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sigusr2_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2002-09-09 21:25:28 +00:00
|
|
|
dump_device_stats();
|
|
|
|
dump_nodes();
|
|
|
|
dump_edges();
|
|
|
|
dump_subnets();
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE sigwinch_handler(int a)
|
2002-02-10 21:57:54 +00:00
|
|
|
{
|
2003-07-22 20:55:21 +00:00
|
|
|
do_purge = true;
|
2002-02-10 21:57:54 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE unexpected_signal_handler(int a)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-07-12 17:41:48 +00:00
|
|
|
logger(LOG_WARNING, _("Got unexpected signal %d (%s)"), a, strsignal(a));
|
2002-09-09 21:25:28 +00:00
|
|
|
cp_trace();
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static RETSIGTYPE ignore_signal_handler(int a)
|
2001-03-13 09:55:14 +00:00
|
|
|
{
|
2003-07-12 17:41:48 +00:00
|
|
|
ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Ignored signal %d (%s)"), a, strsignal(a));
|
2001-03-13 09:55:14 +00:00
|
|
|
}
|
|
|
|
|
2003-07-06 23:16:29 +00:00
|
|
|
static struct {
|
2002-09-09 21:25:28 +00:00
|
|
|
int signal;
|
2002-09-09 22:33:31 +00:00
|
|
|
void (*handler)(int);
|
2000-11-26 22:42:34 +00:00
|
|
|
} sighandlers[] = {
|
2003-07-22 20:55:21 +00:00
|
|
|
{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}
|
2000-11-26 22:42:34 +00:00
|
|
|
};
|
2003-07-28 22:06:09 +00:00
|
|
|
#endif
|
2000-11-26 22:42:34 +00:00
|
|
|
|
2002-09-09 21:25:28 +00:00
|
|
|
void setup_signals(void)
|
2000-11-16 17:54:29 +00:00
|
|
|
{
|
2003-07-28 22:06:09 +00:00
|
|
|
#ifndef HAVE_MINGW
|
2002-09-09 21:25:28 +00:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 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)
|
2002-09-15 14:55:54 +00:00
|
|
|
fprintf(stderr, _("Installing signal handler for signal %d (%s) failed: %s\n"),
|
2002-09-09 21:25:28 +00:00
|
|
|
sighandlers[i].signal, strsignal(sighandlers[i].signal),
|
|
|
|
strerror(errno));
|
|
|
|
}
|
2003-07-28 22:06:09 +00:00
|
|
|
#endif
|
2000-11-16 17:54:29 +00:00
|
|
|
}
|