/**
* Forks and runs the given application, waits for a maximum of timeout seconds for process to finish.
*
* @param argv The arguments values, the first one is the application path or name
*/
void bb_run_fork_wait(char** argv, int timeout) {
check_handler();
// Fork and attempt to run given application
pid_t ret = fork();
if (ret == 0) {
// Fork went ok, child process replace
bb_run_exec(argv);
} else {
if (ret > 0) {
// Fork went ok, parent process continues
bb_log(LOG_DEBUG, "Process %s started, PID %i.\n", argv[0], ret);
pidlist_add(ret);
//sleep until process finishes or timeout reached
int i = 0;
while (bb_is_running(ret) && ((i < timeout) || (timeout == 0)) && dowait) {
usleep(1000000);
i++;
}
//make a single attempt to kill the process if timed out, without waiting
if (bb_is_running(ret)) {
bb_stop(ret);
}
} else {
// Fork failed
bb_log(LOG_ERR, "Process %s could not be started. fork() failed.\n", argv[0]);
return;
}
}
return;
}
/**
* Runs a requested program if fallback mode was enabled
* @param argv The program and param list to be executed
* @return EXIT_FAILURE on failure and if fallback was disabled, -1 on failure
* and if fallback was enabled and never on success
*/
static int run_fallback(char *argv[]) {
if (bb_status.runmode == BB_RUN_APP && bb_config.fallback_start) {
bb_log(LOG_WARNING, "The Bumblebee server was not available.\n");
bb_run_exec(argv);
bb_log(LOG_ERR, "Unable to start program in fallback mode.\n");
}
return EXIT_FAILURE;
}
/**
* Forks and runs the given application, using an optional LD_LIBRARY_PATH. The
* function then returns immediately.
* stderr and stdout of the ran application is redirected to the parameter redirect.
* stdin is redirected to /dev/null always.
*
* @param argv The arguments values, the first one is the program
* @param ldpath The library path to be used if any (may be NULL)
* @param redirect The file descriptor to redirect stdout/stderr to. Must be valid and open.
* @return The childs process ID
*/
pid_t bb_run_fork_ld_redirect(char **argv, char *ldpath, int redirect) {
check_handler();
// Fork and attempt to run given application
pid_t ret = fork();
if (ret == 0) {
if (ldpath && *ldpath) {
char *current_path = getenv("LD_LIBRARY_PATH");
/* Fork went ok, set environment if necessary */
if (current_path) {
char *ldpath_new = malloc(strlen(ldpath) + 1 + strlen(current_path) + 1);
if (ldpath_new) {
strcpy(ldpath_new, ldpath);
strcat(ldpath_new, ":");
strcat(ldpath_new, current_path);
setenv("LD_LIBRARY_PATH", ldpath_new, 1);
free(ldpath_new);
} else {
bb_log(LOG_WARNING, "Could not allocate memory for LD_LIBRARY_PATH\n");
}
} else {
setenv("LD_LIBRARY_PATH", ldpath, 1);
}
}
//open /dev/null for stdin redirect
int devnull = open("/dev/null", O_RDWR);
//fail silently on error, nothing we can do about it anyway...
if (devnull >= 0){dup2(devnull, STDIN_FILENO);}
//redirect stdout and stderr to the given filenum.
dup2(redirect, STDOUT_FILENO);
dup2(redirect, STDERR_FILENO);
close(devnull);
//ok, all ready, now actually execute
bb_run_exec(argv);
} else {
if (ret > 0) {
// Fork went ok, parent process continues
bb_log(LOG_DEBUG, "Process %s started, PID %i.\n", argv[0], ret);
pidlist_add(ret);
} else {
// Fork failed
bb_log(LOG_ERR, "Process %s could not be started. fork() failed.\n", argv[0]);
return 0;
}
}
return ret;
}
/**
* Forks and runs the given application and waits for the process to finish
*
* @param argv The arguments values, the first one is the program
* @param detached non-zero if the std in/output must be redirected to /dev/null, zero otherwise
* @return Exit code of the program (between 0 and 255) or -1 on failure
*/
int bb_run_fork(char **argv, int detached) {
int exitcode = -1;
check_handler();
/* Fork and attempt to run given application */
pid_t pid = fork();
if (pid == 0) {
/* child process after fork */
if (detached) {
bb_run_exec_detached(argv);
} else {
bb_run_exec(argv);
}
} else if (pid > 0) {
/* parent process after fork */
int status = 0;
bb_log(LOG_DEBUG, "Process %s started, PID %i.\n", argv[0], pid);
pidlist_add(pid);
if (waitpid(pid, &status, 0) != -1) {
if (WIFEXITED(status)) {
/* program exited normally, return status */
exitcode = WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {
/* program was terminated by a signal */
exitcode = 128 + WTERMSIG(status);
}
} else {
bb_log(LOG_ERR, "waitpid(%i) faild with %s\n", pid, strerror(errno));
}
pidlist_remove(pid);
} else {
/* Fork failed */
bb_log(LOG_ERR, "Process %s could not be started. fork() failed.\n", argv[0]);
}
/* could not determine return value */
return exitcode;
}
/**
* Forks and runs the given application, using an optional LD_LIBRARY_PATH. The
* function then returns immediately
*
* @param argv The arguments values, the first one is the program
* @param ldpath The library path to be used if any (may be NULL)
* @return The childs process ID
*/
pid_t bb_run_fork_ld(char **argv, char *ldpath) {
check_handler();
// Fork and attempt to run given application
pid_t ret = fork();
if (ret == 0) {
if (ldpath && *ldpath) {
char *current_path = getenv("LD_LIBRARY_PATH");
/* Fork went ok, set environment if necessary */
if (current_path) {
char *ldpath_new = malloc(strlen(ldpath) + 1 + strlen(current_path) + 1);
if (ldpath_new) {
strcpy(ldpath_new, ldpath);
strcat(ldpath_new, ":");
strcat(ldpath_new, current_path);
setenv("LD_LIBRARY_PATH", ldpath_new, 1);
free(ldpath_new);
} else {
bb_log(LOG_WARNING, "Could not allocate memory for LD_LIBRARY_PATH\n");
}
} else {
setenv("LD_LIBRARY_PATH", ldpath, 1);
}
}
bb_run_exec(argv);
} else {
if (ret > 0) {
// Fork went ok, parent process continues
bb_log(LOG_INFO, "Process %s started, PID %i.\n", argv[0], ret);
pidlist_add(ret);
} else {
// Fork failed
bb_log(LOG_ERR, "Process %s could not be started. fork() failed.\n", argv[0]);
return 0;
}
}
return ret;
}
int main(int argc, char* argv[]) {
/* Setup signal handling before anything else */
signal(SIGHUP, handle_signal);
signal(SIGTERM, handle_signal);
signal(SIGINT, handle_signal);
signal(SIGQUIT, handle_signal);
/* Initializing configuration */
init_config(argc, argv);
/* set runmode depending on leftover arguments */
if (optind >= argc) {
bb_status.runmode = BB_RUN_STATUS;
} else {
bb_status.runmode = BB_RUN_APP;
}
bb_init_log();
bb_log(LOG_DEBUG, "%s version %s starting...\n", bb_status.program_name, GITVERSION);
/* Connect to listening daemon */
bb_status.bb_socket = socketConnect(bb_config.socket_path, SOCK_NOBLOCK);
if (bb_status.bb_socket < 0) {
bb_log(LOG_ERR, "Could not connect to bumblebee daemon - is it running?\n");
bb_closelog();
return EXIT_FAILURE;
}
char buffer[BUFFER_SIZE];
int r;
/* Request status */
if (bb_status.runmode == BB_RUN_STATUS) {
r = snprintf(buffer, BUFFER_SIZE, "Status?");
socketWrite(&bb_status.bb_socket, buffer, r);
while (bb_status.bb_socket != -1) {
r = socketRead(&bb_status.bb_socket, buffer, BUFFER_SIZE);
if (r > 0) {
printf("Bumblebee status: %*s\n", r, buffer);
socketClose(&bb_status.bb_socket);
}
}
}
/* Run given application */
if (bb_status.runmode == BB_RUN_APP) {
int ranapp = 0;
r = snprintf(buffer, BUFFER_SIZE, "Checking availability...");
socketWrite(&bb_status.bb_socket, buffer, r);
while (bb_status.bb_socket != -1) {
r = socketRead(&bb_status.bb_socket, buffer, BUFFER_SIZE);
if (r > 0) {
bb_log(LOG_INFO, "Response: %*s\n", r, buffer);
switch (buffer[0]) {
case 'N': //No, run normally.
socketClose(&bb_status.bb_socket);
if (!bb_config.fallback_start){
bb_log(LOG_ERR, "Cannot access secondary GPU. Aborting.\n");
}
break;
case 'Y': //Yes, run through vglrun
bb_log(LOG_INFO, "Running application through vglrun.\n");
ranapp = 1;
//run vglclient if any method other than proxy is used
if (strncmp(bb_config.vgl_compress, "proxy", BUFFER_SIZE) != 0) {
char * vglclient_args[] = {
"vglclient",
"-detach",
0
};
bb_run_fork(vglclient_args);
}
char ** vglrun_args = malloc(sizeof (char *) * (9 + argc - optind));
vglrun_args[0] = "vglrun";
vglrun_args[1] = "-c";
vglrun_args[2] = bb_config.vgl_compress;
vglrun_args[3] = "-d";
vglrun_args[4] = bb_config.x_display;
vglrun_args[5] = "-ld";
vglrun_args[6] = bb_config.ld_path;
vglrun_args[7] = "--";
for (r = 0; r < argc - optind; r++) {
vglrun_args[8 + r] = argv[optind + r];
}
vglrun_args[8 + r] = 0;
bb_run_fork_wait(vglrun_args);
socketClose(&bb_status.bb_socket);
break;
default: //Something went wrong - output and exit.
bb_log(LOG_ERR, "Problem: %*s\n", r, buffer);
socketClose(&bb_status.bb_socket);
break;
}
}
}
if (!ranapp && bb_config.fallback_start) {
bb_log(LOG_WARNING, "Running application normally.\n");
bb_run_exec(argv + optind);
}
}
bb_closelog();
bb_stop_all(); //stop any started processes that are left
return (EXIT_SUCCESS);
}
