+void main_loop(void) {
+ int status;
+ pid_t who_exited;
+ int citserver_exit_code = 0;
+
+ do {
+ fprintf(stderr, "ctdlvisor: waiting for any child process to exit...\n");
+ who_exited = waitpid(-1, &status, 0);
+ fprintf(stderr, "ctdlvisor: pid=%d exited, status=%d, exitcode=%d\n", who_exited, status, WEXITSTATUS(status));
+
+ // A *deliberate* exit of citserver will cause ctdlvisor to shut the whole AppImage down.
+ // If it crashes, however, we will start it back up.
+ if (who_exited == citserver_pid) {
+ citserver_exit_code = WEXITSTATUS(status);
+ if (citserver_exit_code == 0) {
+ fprintf(stderr, "ctdlvisor: citserver exited normally - ending AppImage session\n");
+ shutting_down = 1;
+ kill(webcit_pid, SIGTERM);
+ kill(webcits_pid, SIGTERM);
+ }
+ else if ((citserver_exit_code >= 101) && (citserver_exit_code <= 109)) {
+ fprintf(stderr, "ctdlvisor: citserver exited intentionally - ending AppImage session\n");
+ shutting_down = 1;
+ kill(webcit_pid, SIGTERM);
+ kill(webcits_pid, SIGTERM);
+ }
+ else {
+ citserver_pid = start_citadel();
+ }
+ }
+
+ // WebCit processes are restarted if they exit for any reason.
+ if ((who_exited == webcit_pid) && (!shutting_down)) webcit_pid = start_webcit();
+ if ((who_exited == webcits_pid) && (!shutting_down)) webcits_pid = start_webcits();
+
+ // If we somehow end up in an endless loop, at least slow it down.
+ sleep(1);
+
+ } while (who_exited >= 0);
+ ctdlvisor_exit(citserver_exit_code);
+}
+
+
+void run_in_foreground(void) {
+ fprintf(stderr, "ctdlvisor: Welcome to the Citadel System, brought to you using AppImage.\n");
+ fprintf(stderr, "ctdlvisor: LD_LIBRARY_PATH = %s\n", getenv("LD_LIBRARY_PATH"));
+ fprintf(stderr, "ctdlvisor: PATH = %s\n", getenv("PATH"));
+ fprintf(stderr, "ctdlvisor: APPDIR = %s\n", getenv("APPDIR"));
+ fprintf(stderr, "ctdlvisor: data directory = %s\n", data_directory);
+ fprintf(stderr, "ctdlvisor: HTTP port = %s\n", http_port);
+ fprintf(stderr, "ctdlvisor: HTTPS port = %s\n", https_port);
+
+ if (access(data_directory, R_OK|W_OK|X_OK)) {
+ fprintf(stderr, "ctdlvisor: %s: %s\n", data_directory, strerror(errno));
+ ctdlvisor_exit(errno);
+ }
+
+ signal(SIGTERM, signal_handler);
+ signal(SIGHUP, signal_handler);
+ signal(SIGINT, signal_handler);
+ signal(SIGQUIT, signal_handler);
+
+ citserver_pid = start_citadel();
+ webcit_pid = start_webcit();
+ webcits_pid = start_webcits();
+
+ main_loop();
+ ctdlvisor_exit(0);
+}
+
+
+void install_as_service(void) {
+
+ // FIXME fail if some other citadel distribution is already there
+ // FIXME fail if any server processes are running
+ // FIXME interact with the user
+ // FIXME get port numbers and data directory
+ // FIXME create the data directory
+ // FIXME move the appimage into its permanent location
+
+ fprintf(stderr, "Installing as service\n");
+
+ FILE *fp = fopen("/etc/systemd/system/ctdl.service", "w");
+ fprintf(fp, "# This unit file starts all Citadel services via the AppImage distribution.\n"
+ "[Unit]\n"
+ "Description=Citadel\n"
+ "After=network.target\n"
+ "[Service]\n"
+ "ExecStart=/root/citadel/appimage/Citadel-x86_64.AppImage run -h %s -s %s -s %s\n"
+ "ExecStop=/bin/kill $MAINPID\n"
+ "KillMode=process\n"
+ "Restart=on-failure\n"
+ "LimitCORE=infinity\n"
+ "[Install]\n"
+ "WantedBy=multi-user.target\n"
+ ,
+ data_directory, http_port, https_port
+ );
+ fclose(fp);
+
+ fprintf(stderr, "systemd unit file is installed. Type 'systemctl enable ctdl' to have it start at boot.\n");
+}
+
+