/*
process.c -- process management functions
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2015 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
#include "device.h"
#include "edge.h"
#include "logger.h"
+#include "net.h"
#include "node.h"
#include "pidfile.h"
#include "process.h"
extern char *pidfilename;
extern char **g_argv;
extern bool use_logfile;
-extern volatile bool running;
#ifndef HAVE_MINGW
-sigset_t emptysigset;
+static sigset_t emptysigset;
#endif
-static int saved_debug_level = -1;
-
-static void memory_full(int size) {
- logger(LOG_ERR, "Memory exhausted (couldn't allocate %d bytes), exitting.", size);
- exit(1);
-}
-
/* Some functions the less gifted operating systems might lack... */
#ifdef HAVE_MINGW
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 - strlen(command));
+ GetCurrentDirectory(sizeof(command) - 1, command + 1);
+ strncat(command, "\\", sizeof(command) - strlen(command));
}
- strncat(command, program_name, sizeof command - strlen(command));
+ strncat(command, program_name, sizeof(command) - strlen(command));
- strncat(command, "\"", sizeof command - strlen(command));
+ strncat(command, "\"", sizeof(command) - strlen(command));
for(argp = g_argv + 1; *argp; argp++) {
space = strchr(*argp, ' ');
- strncat(command, " ", sizeof command - strlen(command));
-
- if(space)
- strncat(command, "\"", sizeof command - strlen(command));
-
- strncat(command, *argp, sizeof command - strlen(command));
+ strncat(command, " ", sizeof(command) - strlen(command));
+
+ if(space) {
+ 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);
-
+ 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(LOG_ERR, "Could not create %s service: %s", identname, winerror(lasterror));
- if(lasterror != ERROR_SERVICE_EXISTS)
+
+ if(lasterror != ERROR_SERVICE_EXISTS) {
return false;
+ }
}
if(service) {
service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
}
- if(!StartService(service, 0, NULL))
+ if(!StartService(service, 0, NULL)) {
logger(LOG_WARNING, "Could not start %s service: %s", identname, winerror(GetLastError()));
- else
+ } 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;
return false;
}
- if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
+ if(!ControlService(service, SERVICE_CONTROL_STOP, &status)) {
logger(LOG_ERR, "Could not stop %s service: %s", identname, winerror(GetLastError()));
- else
+ } else {
logger(LOG_INFO, "%s service stopped", identname);
+ }
if(!DeleteService(service)) {
logger(LOG_ERR, "Could not remove %s service: %s", identname, winerror(GetLastError()));
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(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;
+ case SERVICE_CONTROL_INTERROGATE:
+ SetServiceStatus(statushandle, &status);
+ return NO_ERROR;
+
+ 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", (int)request);
+ return ERROR_CALL_NOT_IMPLEMENTED;
}
if(running) {
running = false;
- status.dwWaitHint = 30000;
- status.dwCurrentState = SERVICE_STOP_PENDING;
+ status.dwWaitHint = 30000;
+ status.dwCurrentState = SERVICE_STOP_PENDING;
SetServiceStatus(statushandle, &status);
return NO_ERROR;
} else {
- status.dwWaitHint = 0;
- status.dwCurrentState = SERVICE_STOPPED;
+ status.dwWaitHint = 0;
+ status.dwCurrentState = SERVICE_STOPPED;
SetServiceStatus(statushandle, &status);
exit(1);
}
}
-VOID WINAPI run_service(DWORD argc, LPTSTR* argv) {
- int err = 1;
+VOID WINAPI run_service(DWORD argc, LPTSTR *argv) {
extern int main2(int argc, char **argv);
-
- status.dwServiceType = SERVICE_WIN32;
+ status.dwServiceType = SERVICE_WIN32;
status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
- status.dwWin32ExitCode = 0;
- status.dwServiceSpecificExitCode = 0;
- status.dwCheckPoint = 0;
+ status.dwWin32ExitCode = 0;
+ status.dwServiceSpecificExitCode = 0;
+ status.dwCheckPoint = 0;
- statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL);
+ statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL);
- if (!statushandle) {
+ if(!statushandle) {
logger(LOG_ERR, "System call `%s' failed: %s", "RegisterServiceCtrlHandlerEx", winerror(GetLastError()));
- err = 1;
} else {
- status.dwWaitHint = 30000;
- status.dwCurrentState = SERVICE_START_PENDING;
+ status.dwWaitHint = 30000;
+ status.dwCurrentState = SERVICE_START_PENDING;
SetServiceStatus(statushandle, &status);
- status.dwWaitHint = 0;
+ status.dwWaitHint = 0;
status.dwCurrentState = SERVICE_RUNNING;
SetServiceStatus(statushandle, &status);
- err = main2(argc, argv);
+ main2(argc, argv);
status.dwWaitHint = 0;
- status.dwCurrentState = SERVICE_STOPPED;
- //status.dwWin32ExitCode = err;
+ status.dwCurrentState = SERVICE_STOPPED;
SetServiceStatus(statushandle, &status);
}
if(!StartServiceCtrlDispatcher(services)) {
if(GetLastError() == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) {
return false;
- }
- else
+ } else {
logger(LOG_ERR, "System call `%s' failed: %s", "StartServiceCtrlDispatcher", winerror(GetLastError()));
+ }
}
return true;
if(pid) {
if(netname)
fprintf(stderr, "A tincd is already running for net `%s' with pid %ld.\n",
- netname, (long)pid);
- else
+ 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(pidfilename)) {
- fprintf(stderr, "Could write pid file %s: %s\n", pidfilename, strerror(errno));
+ fprintf(stderr, "Couldn't write pid file %s: %s\n", pidfilename, strerror(errno));
return false;
}
if(!pid) {
if(netname)
fprintf(stderr, "No other tincd is running for net `%s'.\n",
- netname);
- else
+ netname);
+ else {
fprintf(stderr, "No other tincd is running.\n");
+ }
+
return false;
}
- errno = 0; /* No error, sometimes errno is only changed on error */
+ 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(netname)
fprintf(stderr, "The tincd for net `%s' is no longer running. ",
- netname);
- else
+ netname);
+ else {
fprintf(stderr, "The tincd is no longer running. ");
+ }
fprintf(stderr, "Removing stale lock file.\n");
remove_pid(pidfilename);
/* First check if we can open a fresh new pidfile */
#ifndef HAVE_MINGW
- if(!write_pidfile())
+
+ if(!write_pidfile()) {
return false;
+ }
/* If we succeeded in doing that, detach */
if(do_detach) {
#ifndef HAVE_MINGW
+
if(daemon(0, 0)) {
fprintf(stderr, "Couldn't detach from terminal: %s",
- strerror(errno));
+ strerror(errno));
return false;
}
fprintf(stderr, "Could not write pid file %s: %s\n", pidfilename, strerror(errno));
return false;
}
+
#else
- if(!statushandle)
+
+ if(!statushandle) {
exit(install_service());
+ }
+
#endif
}
- openlogger(identname, use_logfile?LOGMODE_FILE:(do_detach?LOGMODE_SYSLOG:LOGMODE_STDERR));
-
- logger(LOG_NOTICE, "tincd %s (%s %s) starting, debug level %d",
- VERSION, __DATE__, __TIME__, debug_level);
+ openlogger(identname, use_logfile ? LOGMODE_FILE : (do_detach ? LOGMODE_SYSLOG : LOGMODE_STDERR));
- xalloc_fail_func = memory_full;
+ logger(LOG_NOTICE, "tincd %s starting, debug level %d",
+ VERSION, debug_level);
return true;
}
+#ifdef HAVE_PUTENV
+void unputenv(char *p) {
+ char *e = strchr(p, '=');
+
+ if(!e) {
+ return;
+ }
+
+ int len = e - p;
+#ifndef HAVE_UNSETENV
+#ifdef HAVE_MINGW
+ // Windows requires putenv("FOO=") to unset %FOO%
+ len++;
+#endif
+#endif
+ char var[len + 1];
+ memcpy(var, p, len);
+ var[len] = 0;
+#ifdef HAVE_UNSETENV
+ unsetenv(var);
+#else
+ // We must keep what we putenv() around in memory.
+ // To do this without memory leaks, keep things in a list and reuse if possible.
+ static list_t list = {};
+
+ for(list_node_t *node = list.head; node; node = node->next) {
+ char *data = node->data;
+
+ if(!strcmp(data, var)) {
+ putenv(data);
+ return;
+ }
+ }
+
+ char *data = xstrdup(var);
+ list_insert_tail(&list, data);
+ putenv(data);
+#endif
+}
+#else
+void putenv(const char *p) {}
+void unputenv(const char *p) {}
+#endif
+
bool execute_script(const char *name, char **envp) {
#ifdef HAVE_SYSTEM
- int status, len;
- char *scriptname, *p;
- int i;
+ char *scriptname;
+ char *interpreter = NULL;
+ config_t *cfg_interpreter;
+ int status, len, i;
+ cfg_interpreter = lookup_config(config_tree, "ScriptsInterpreter");
#ifndef HAVE_MINGW
len = xasprintf(&scriptname, "\"%s/%s\"", confbase, name);
#else
- len = xasprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
+
+ if(cfg_interpreter) {
+ len = xasprintf(&scriptname, "\"%s/%s\"", confbase, name);
+ } else {
+ len = xasprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
+ }
+
#endif
- if(len < 0)
+
+ if(len < 0) {
return false;
+ }
scriptname[len - 1] = '\0';
-#ifndef HAVE_TUNEMU
/* First check if there is a script */
-
if(access(scriptname + 1, F_OK)) {
free(scriptname);
return true;
}
-#endif
+
+ // Custom scripts interpreter
+ if(get_config_string(cfg_interpreter, &interpreter)) {
+ // Force custom scripts interpreter allowing execution of scripts on android without execution flag (such as on /sdcard)
+ free(scriptname);
+ len = xasprintf(&scriptname, "%s \"%s/%s\"", interpreter, confbase, name);
+ free(interpreter);
+
+ if(len < 0) {
+ return false;
+ }
+ }
ifdebug(STATUS) logger(LOG_INFO, "Executing script %s", name);
-#ifdef HAVE_PUTENV
/* Set environment */
-
- for(i = 0; envp[i]; i++)
+
+ for(i = 0; envp[i]; i++) {
putenv(envp[i]);
-#endif
+ }
scriptname[len - 1] = '\"';
status = system(scriptname);
/* Unset environment */
for(i = 0; envp[i]; i++) {
- char *e = strchr(envp[i], '=');
- if(e) {
- p[e - envp[i] + 1];
- strncpy(p, envp[i], e - envp[i]);
- p[e - envp[i]] = '\0';
- putenv(p);
- }
+ unputenv(envp[i]);
}
-#ifdef WEXITSTATUS
if(status != -1) {
- if(WIFEXITED(status)) { /* Child exited by itself */
+#ifdef WEXITSTATUS
+
+ if(WIFEXITED(status)) { /* Child exited by itself */
if(WEXITSTATUS(status)) {
logger(LOG_ERR, "Script %s exited with non-zero status %d",
- name, WEXITSTATUS(status));
+ name, WEXITSTATUS(status));
return false;
}
- } else if(WIFSIGNALED(status)) { /* Child was killed by a signal */
+ } 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)));
+ name, WTERMSIG(status), strsignal(WTERMSIG(status)));
return false;
- } else { /* Something strange happened */
+ } else { /* Something strange happened */
logger(LOG_ERR, "Script %s terminated abnormally", name);
return false;
}
+
+#endif
} else {
logger(LOG_ERR, "System call `%s' failed: %s", "system", strerror(errno));
return false;
}
-#endif
+
#endif
return true;
}
#ifndef HAVE_MINGW
static RETSIGTYPE sigterm_handler(int a) {
logger(LOG_NOTICE, "Got %s signal", "TERM");
- if(running)
+
+ if(running) {
running = false;
- else
+ } else {
exit(1);
+ }
}
static RETSIGTYPE sigquit_handler(int a) {
logger(LOG_NOTICE, "Got %s signal", "QUIT");
- if(running)
+
+ if(running) {
running = false;
- else
+ } else {
exit(1);
+ }
}
static RETSIGTYPE fatal_signal_square(int a) {
logger(LOG_ERR, "Got another fatal signal %d (%s): not restarting.", a,
- strsignal(a));
+ strsignal(a));
exit(1);
}
}
static RETSIGTYPE sigint_handler(int a) {
+ static int saved_debug_level = -1;
+
logger(LOG_NOTICE, "Got %s signal", "INT");
if(saved_debug_level != -1) {
logger(LOG_NOTICE, "Reverting to old debug level (%d)",
- saved_debug_level);
+ saved_debug_level);
debug_level = saved_debug_level;
saved_debug_level = -1;
} else {
logger(LOG_NOTICE,
- "Temporarily setting debug level to 5. Kill me with SIGINT again to go back to level %d.",
- debug_level);
+ "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;
}
}
static RETSIGTYPE sigusr2_handler(int a) {
- dump_device_stats();
+ devops.dump_stats();
dump_nodes();
dump_edges();
dump_subnets();
{SIGCHLD, ignore_signal_handler},
{SIGALRM, sigalrm_handler},
{SIGWINCH, sigwinch_handler},
+ {SIGABRT, SIG_DFL},
{0, NULL}
};
#endif
/* Set a default signal handler for every signal, errors will be
ignored. */
for(i = 1; i < NSIG; i++) {
- if(!do_detach)
+ if(!do_detach) {
act.sa_handler = SIG_DFL;
- else
+ } else {
act.sa_handler = unexpected_signal_handler;
+ }
+
sigaction(i, &act, NULL);
}
/* If we didn't detach, allow coredumps */
- if(!do_detach)
+ 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));
+ sighandlers[i].signal, strsignal(sighandlers[i].signal),
+ strerror(errno));
}
+
#endif
}
projects / tinc / blobdiff