279 lines
7.8 KiB
C++
279 lines
7.8 KiB
C++
/*
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Copyright (C) 2001-2003 Paul Davis
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Copyright (C) 2004-2008 Grame
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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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#if !defined(WIN32) || defined(__CYGWIN__)
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#ifdef PTHREAD_WIN32 // Added by JE - 13-02-2010
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#include <ptw32/pthread.h> // Makes sure we #include the ptw32 version for
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#endif // consistency - even though we won't need it !
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#include "JackConstants.h"
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#include "JackChannel.h"
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#include "JackLibGlobals.h"
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#include "JackServerLaunch.h"
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#include "JackPlatformPlug.h"
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#include <sys/wait.h>
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using namespace Jack;
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#if defined(USE_LIBDBUS_AUTOLAUNCH)
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#include <dbus/dbus.h>
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static int start_server_dbus(const char* server_name)
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{
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DBusError err;
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DBusConnection *conn;
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DBusMessage *msg;
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// initialise the errors
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dbus_error_init(&err);
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// connect to the bus
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conn = dbus_bus_get(DBUS_BUS_SESSION, &err);
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if (dbus_error_is_set(&err)) {
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fprintf(stderr, "Connection Error (%s)\n", err.message);
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dbus_error_free(&err);
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}
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if (NULL == conn) {
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return 1;
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}
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msg = dbus_message_new_method_call(
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"org.jackaudio.service", // target for the method call
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"/org/jackaudio/Controller", // object to call on
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"org.jackaudio.JackControl", // interface to call on
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"StartServer"); // method name
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if (NULL == msg) {
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fprintf(stderr, "Message Null\n");
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return 1;
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}
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// send message and get a handle for a reply
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if (!dbus_connection_send(conn, msg, NULL))
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{
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fprintf(stderr, "Out Of Memory!\n");
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return 1;
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}
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dbus_message_unref(msg);
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dbus_connection_flush(conn);
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dbus_error_free(&err);
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return 0;
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}
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#elif defined(USE_CLASSIC_AUTOLAUNCH)
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/* Exec the JACK server in this process. Does not return. */
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static void start_server_classic_aux(const char* server_name)
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{
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FILE* fp = 0;
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char filename[255];
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char arguments[255];
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char buffer[255];
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char* command = 0;
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size_t pos = 0;
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size_t result = 0;
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char** argv = 0;
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int i = 0;
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int good = 0;
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int res;
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snprintf(filename, 255, "%s/.jackdrc", getenv("HOME"));
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fp = fopen(filename, "r");
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if (!fp) {
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fp = fopen("/etc/jackdrc", "r");
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}
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/* if still not found, check old config name for backwards compatibility */
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if (!fp) {
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fp = fopen("/etc/jackd.conf", "r");
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}
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if (fp) {
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arguments[0] = '\0';
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res = fscanf(fp, "%s", buffer);
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while (res != 0 && res != EOF) {
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strcat(arguments, buffer);
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strcat(arguments, " ");
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res = fscanf(fp, "%s", buffer);
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}
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if (strlen(arguments) > 0) {
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good = 1;
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}
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fclose(fp);
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}
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if (!good) {
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command = (char*)(JACK_LOCATION "/jackd");
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strncpy(arguments, JACK_LOCATION "/jackd -T -d " JACK_DEFAULT_DRIVER, 255);
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} else {
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result = strcspn(arguments, " ");
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command = (char*)malloc(result + 1);
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strncpy(command, arguments, result);
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command[result] = '\0';
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}
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argv = (char**)malloc(255);
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while (1) {
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/* insert -T and -nserver_name in front of arguments */
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if (i == 1) {
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argv[i] = (char*)malloc(strlen ("-T") + 1);
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strcpy (argv[i++], "-T");
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if (server_name) {
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size_t optlen = strlen("-n");
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char* buf = (char*)malloc(optlen + strlen(server_name) + 1);
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strcpy(buf, "-n");
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strcpy(buf + optlen, server_name);
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argv[i++] = buf;
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}
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}
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/* skip whitespace */
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while (pos < strlen(arguments) && arguments[pos] && arguments[pos] == ' ') {
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++pos;
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}
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if (pos >= strlen(arguments)) {
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break;
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}
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if (arguments[pos] == '\"') {
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++pos;
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result = strcspn(arguments + pos, "\"");
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} else {
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result = strcspn(arguments + pos, " ");
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}
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if (0 == result) {
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break;
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}
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argv[i] = (char*)malloc(result + 1);
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strncpy(argv[i], arguments + pos, result);
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argv[i][result] = '\0';
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pos += result + 1;
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if (++i > 253) {
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break;
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}
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}
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argv[i] = 0;
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execv(command, argv);
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/* If execv() succeeds, it does not return. There's no point
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* in calling jack_error() here in the child process. */
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fprintf(stderr, "exec of JACK server (command = \"%s\") failed: %s\n", command, strerror(errno));
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}
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static int start_server_classic(const char* server_name)
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{
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/* The double fork() forces the server to become a child of
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* init, which will always clean up zombie process state on
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* termination. This even works in cases where the server
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* terminates but this client does not.
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*
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* Since fork() is usually implemented using copy-on-write
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* virtual memory tricks, the overhead of the second fork() is
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* probably relatively small.
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*/
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int status;
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pid_t first_child_pid;
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first_child_pid = fork();
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switch (first_child_pid) {
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case 0: /* child process */
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switch (fork()) {
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case 0: /* grandchild process */
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start_server_classic_aux(server_name);
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_exit(99); /* exec failed */
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case - 1:
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_exit(98);
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default:
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_exit(0);
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}
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case - 1: /* fork() error */
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return 1; /* failed to start server */
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}
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waitpid(first_child_pid, &status, 0);
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/* only the original parent process goes here */
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return 0; /* (probably) successful */
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}
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#endif
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static int start_server(const char* server_name, jack_options_t options)
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{
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if ((options & JackNoStartServer) || getenv("JACK_NO_START_SERVER")) {
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return 1;
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}
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#if defined(USE_LIBDBUS_AUTOLAUNCH)
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return start_server_dbus(server_name);
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#elif defined(USE_CLASSIC_AUTOLAUNCH)
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return start_server_classic(server_name);
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#else
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fprintf(stderr, "Automatic start of JACK server is disabled at configure time\n");
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return 1;
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#endif
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}
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static int server_connect(char* server_name)
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{
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JackClientChannel channel;
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int res = channel.ServerCheck(server_name);
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channel.Close();
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JackSleep(2000); // Added by JE - 02-01-2009 (gives
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// the channel some time to close)
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return res;
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}
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int try_start_server(jack_varargs_t* va, jack_options_t options, jack_status_t* status)
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{
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if (server_connect(va->server_name) < 0) {
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int trys;
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if (start_server(va->server_name, options)) {
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int my_status1 = *status | JackFailure | JackServerFailed;
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*status = (jack_status_t)my_status1;
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return -1;
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}
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trys = 5;
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do {
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sleep(1);
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if (--trys < 0) {
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int my_status1 = *status | JackFailure | JackServerFailed;
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*status = (jack_status_t)my_status1;
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return -1;
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}
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} while (server_connect(va->server_name) < 0);
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int my_status1 = *status | JackServerStarted;
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*status = (jack_status_t)my_status1;
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}
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return 0;
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}
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#endif // !defined(WIN32) || defined(__CYGWIN__)
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