X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=server.c;h=245562631d18122084d97ca2af9f9afdec2cf59f;hp=7fccea77482640f45dcef3a8c7809e54924554ca;hb=8b0ab0837ecdd5d28c7b6f31a605552f6942ca64;hpb=49c5a95ab4ca28d13c6faff59110447aeb0099a5 diff --git a/server.c b/server.c index 7fccea77..24556263 100644 --- a/server.c +++ b/server.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 1997-2007 Andre Noll + * Copyright (C) 1997-2009 Andre Noll * * Licensed under the GPL v2. For licencing details see COPYING. */ @@ -10,12 +10,11 @@ /** * \mainpage Paraslash API Reference * - * Starting points for getting an overview are + * Starting points for getting an overview: * - * probably: * * - The main programs: \ref server.c, \ref audiod.c, \ref client.c, - * \ref audioc.c, \ref fsck.c, + * \ref audioc.c, \ref afh.c * - Server: \ref server_command, \ref sender, * - Audio file selector: \ref audio_format_handler, \ref mood, \ref afs_table, * - Client: \ref receiver, \ref receiver_node, \ref filter, \ref filter_node. @@ -23,12 +22,12 @@ * * The gory details, listed by topic: * - * - Audio format handlers: \ref mp3_afh.c, \ref ogg_afh.c, \ref aac_afh.c, - * - Decoders: \ref mp3dec.c, \ref oggdec.c, \ref aacdec.c, - * - Volume normalizer: \ref compress.c, + * - Audio format handlers: \ref send_common.c \ref mp3_afh.c, \ref ogg_afh.c, \ref aac_afh.c, + * - Decoders: \ref mp3dec_filter.c, \ref oggdec_filter.c, \ref aacdec_filter.c, + * - Volume normalizer: \ref compress_filter.c, * - Output: \ref alsa_write.c, \ref osx_write.c, * - http: \ref http_recv.c, \ref http_send.c, - * - ortp: \ref ortp_recv.c, \ref ortp_send.c, + * - udp: \ref udp_recv.c, \ref udp_send.c, * - dccp: \ref dccp_recv.c, \ref dccp_send.c, * - Audio file selector: \ref afs.c, \ref aft.c, \ref mood.c, * - Afs structures: \ref afs_table, \ref audio_file_data, @@ -48,26 +47,28 @@ * - Time: \ref time.c, * - Spawning processes: \ref exec.c, * - Inter process communication: \ref ipc.c, - * - The object storage layer: \ref osl.c, * - Blob tables: \ref blob.c, * - The error subssystem: \ref error.h. + * - Access control for paraslash senders: \ref acl.c, \ref acl.h. * * Low-level data structures: * * - Doubly linked lists: \ref list.h, - * - Red-black trees: \ref rbtree.h, \ref rbtree.c, * - Ring buffer: \ref ringbuffer.c, \ref ringbuffer.h, * - Hashing: \ref hash.h, \ref sha1.h, \ref sha1.c, * - Crypto: \ref crypt.c. - * + * - Forward error correction: \ref fec.c */ #include -#include #include +#include +#include +#include #include "para.h" #include "error.h" +#include "crypt.h" #include "server.cmdline.h" #include "afh.h" #include "string.h" @@ -76,20 +77,21 @@ #include "vss.h" #include "config.h" #include "close_on_fork.h" +#include "list.h" #include "send.h" #include "net.h" #include "daemon.h" #include "ipc.h" #include "fd.h" -#include "list.h" #include "sched.h" #include "signal.h" #include "user_list.h" +#include "color.h" -/** define the array of error lists needed by para_server */ +/** Define the array of error lists needed by para_server. */ INIT_SERVER_ERRLISTS; -/** shut down non-authorized connections after that many seconds */ +/** Shut down non-authorized connections after that many seconds. */ #define ALARM_TIMEOUT 10 /** @@ -99,95 +101,77 @@ INIT_SERVER_ERRLISTS; struct misc_meta_data *mmd; /** - * the configuration of para_server + * The configuration of para_server * * It also contains the options for the audio file selector, audio format * handler and all supported senders. */ struct server_args_info conf; -/** the file containing user information (public key, permissions) */ -char *user_list_file = NULL; - -extern void dccp_send_init(struct sender *); -extern void http_send_init(struct sender *); -extern void ortp_send_init(struct sender *); - -/** the list of supported senders */ -struct sender senders[] = { - { - .name = "http", - .init = http_send_init, - }, - { - .name = "dccp", - .init = dccp_send_init, - }, -#ifdef HAVE_ORTP - { - .name = "ortp", - .init = ortp_send_init, - }, -#endif - { - .name = NULL, - } -}; +/** A random value used in child context for authentication. */ +uint32_t afs_socket_cookie; +/** The mutex protecting the shared memory area containing the mmd struct. */ +int mmd_mutex; -/* global variables for server-internal use */ -static FILE *logfile; -static int mmd_mutex, mmd_shm_id; -static int signal_pipe; +/** The file containing user information (public key, permissions). */ +static char *user_list_file = NULL; -/** - * para_server's log function - * - * \param ll the log level - * \param fmt the format string describing the log message - */ -void para_log(int ll, const char* fmt,...) + +/** The task responsible for server command handling. */ +struct server_command_task { + /** TCP port on which para_server listens for connections. */ + int listen_fd; + /** Copied from para_server's main function. */ + int argc; + /** Argument vector passed to para_server's main function. */ + char **argv; + /** The command task structure for scheduling. */ + struct task task; +}; + +static int want_colors(void) +{ + if (conf.color_arg == color_arg_no) + return 0; + if (conf.color_arg == color_arg_yes) + return 1; + if (conf.logfile_given) + return 0; + return isatty(STDERR_FILENO); +} + +static void init_colors_or_die(void) { - va_list argp; - FILE *outfd; - struct tm *tm; - time_t t1; - char str[MAXLINE] = ""; - pid_t mypid; - - if (ll < conf.loglevel_arg) + int ret, i; + + if (!want_colors()) return; - outfd = logfile? logfile : stderr; - time(&t1); - tm = localtime(&t1); - strftime(str, MAXLINE, "%b %d %H:%M:%S", tm); - fprintf(outfd, "%s ", str); - if (conf.loglevel_arg <= INFO) - fprintf(outfd, "%i: ", ll); - mypid = getpid(); - if (conf.loglevel_arg <= INFO) - fprintf(outfd, "(%d) ", mypid); - va_start(argp, fmt); - vfprintf(outfd, fmt, argp); - va_end(argp); + daemon_set_flag(DF_COLOR_LOG); + daemon_set_default_log_colors(); + for (i = 0; i < conf.log_color_given; i++) { + ret = daemon_set_log_color(conf.log_color_arg[i]); + if (ret < 0) + exit(EXIT_FAILURE); + } } /* * setup shared memory area and get mutex for locking */ -static void shm_init(void) +static void init_ipc_or_die(void) { void *shm; - int ret = shm_new(sizeof(struct misc_meta_data)); + int shmid, ret = shm_new(sizeof(struct misc_meta_data)); if (ret < 0) goto err_out; - - ret = shm_attach(ret, ATTACH_RW, &shm); + shmid = ret; + ret = shm_attach(shmid, ATTACH_RW, &shm); + shm_destroy(shmid); if (ret < 0) goto err_out; mmd = shm; - mmd_shm_id = ret; ret = mutex_new(); if (ret < 0) @@ -201,41 +185,27 @@ static void shm_init(void) mmd->active_connections = 0; mmd->vss_status_flags = VSS_NEXT; mmd->new_vss_status_flags = VSS_NEXT; - mmd->sender_cmd_data.cmd_num = -1; return; err_out: - PARA_EMERG_LOG("%s", PARA_STRERROR(-ret)); + PARA_EMERG_LOG("%s\n", para_strerror(-ret)); exit(EXIT_FAILURE); } /** - * lock the shared memory area containing the mmd struct + * (Re-)read the server configuration files. * - * \sa semop(2), struct misc_meta_data. - */ -void mmd_lock(void) -{ - mutex_lock(mmd_mutex); -} - -/** - * unlock the shared memory area containing the mmd struct + * \param override Passed to gengetopt to activate the override feature. * - * \sa semop(2), struct misc_meta_data + * This function also re-opens the logfile and sets the global \a + * user_list_file variable. */ - -void mmd_unlock(void) -{ - mutex_unlock(mmd_mutex); -} - -static void parse_config(int override) +void parse_config_or_die(int override) { char *home = para_homedir(); - struct stat statbuf; int ret; char *cf; + daemon_close_log(); if (conf.config_file_given) cf = para_strdup(conf.config_file_arg); else @@ -245,31 +215,33 @@ static void parse_config(int override) user_list_file = make_message("%s/.paraslash/server.users", home); else user_list_file = para_strdup(conf.user_list_arg); - ret = stat(cf, &statbuf); - if (ret && conf.config_file_given) { + ret = file_exists(cf); + if (conf.config_file_given && !ret) { ret = -1; - PARA_EMERG_LOG("can not stat config file %s\n", cf); + PARA_EMERG_LOG("can not read config file %s\n", cf); goto out; } - if (!ret) { + if (ret) { int tmp = conf.daemon_given; struct server_cmdline_parser_params params = { .override = override, .initialize = 0, - .check_required = 0, - .check_ambiguity = 0 + .check_required = 1, + .check_ambiguity = 0, + .print_errors = !conf.daemon_given }; server_cmdline_parser_config_file(cf, &conf, ¶ms); conf.daemon_given = tmp; } - /* logfile */ - if (!conf.logfile_given && conf.daemon_given) { - ret = -1; - PARA_EMERG_LOG("%s", "daemon, but no log file\n"); - goto out; + if (conf.logfile_given) { + daemon_set_logfile(conf.logfile_arg); + daemon_open_log_or_die(); } - if (conf.logfile_given) - logfile = open_log(conf.logfile_arg); + daemon_set_loglevel(conf.loglevel_arg); + init_colors_or_die(); + daemon_set_flag(DF_LOG_PID); + daemon_set_flag(DF_LOG_LL); + daemon_set_flag(DF_LOG_TIME); ret = 1; out: free(cf); @@ -281,144 +253,272 @@ out: exit(EXIT_FAILURE); } -static void setup_signal_handling(void) +static void signal_pre_select(struct sched *s, struct task *t) { - int ret = 0; - - signal_pipe = para_signal_init(); - - PARA_NOTICE_LOG("setting up signal handlers\n"); - ret += para_install_sighandler(SIGINT); - ret += para_install_sighandler(SIGTERM); - ret += para_install_sighandler(SIGHUP); - ret += para_install_sighandler(SIGCHLD); - ret += para_install_sighandler(SIGUSR1); - signal(SIGPIPE, SIG_IGN); - if (ret != 5) { - PARA_EMERG_LOG("%s", "could not install signal handlers\n"); + struct signal_task *st = container_of(t, struct signal_task, task); + para_fd_set(st->fd, &s->rfds, &s->max_fileno); +} + +/* + * called when server gets SIGHUP or when client invokes hup command. + */ +static void handle_sighup(void) +{ + PARA_NOTICE_LOG("SIGHUP\n"); + parse_config_or_die(1); /* reopens log */ + init_user_list(user_list_file); /* reload user list */ + if (mmd->afs_pid) + kill(mmd->afs_pid, SIGHUP); +} + +static void signal_post_select(struct sched *s, struct task *t) +{ + struct signal_task *st = container_of(t, struct signal_task, task); + + if (!FD_ISSET(st->fd, &s->rfds)) + return; + + st->signum = para_next_signal(); + switch (st->signum) { + case SIGHUP: + handle_sighup(); + break; + case SIGCHLD: + for (;;) { + pid_t pid; + int ret = para_reap_child(&pid); + if (ret <= 0) + break; + if (pid != mmd->afs_pid) + continue; + PARA_EMERG_LOG("fatal: afs died\n"); + kill(0, SIGTERM); + goto cleanup; + } + break; + /* die on sigint/sigterm. Kill all children too. */ + case SIGINT: + case SIGTERM: + PARA_EMERG_LOG("terminating on signal %d\n", st->signum); + kill(0, SIGTERM); + /* + * We must wait for afs because afs catches SIGINT/SIGTERM. + * Before reacting to the signal, afs might want to use the + * shared memory area and the mmd mutex. If we destroy this + * mutex too early and afs tries to lock the shared memory + * area, the call to mutex_lock() will fail and terminate the + * afs process. This leads to dirty osl tables. + * + * There's no such problem with the other children of the + * server process (the command handlers) as these reset their + * SIGINT/SIGTERM handlers to the default action, i.e. these + * processes get killed immediately by the above kill(). + */ + PARA_INFO_LOG("waiting for afs (pid %d) to die\n", + (int)mmd->afs_pid); + waitpid(mmd->afs_pid, NULL, 0); +cleanup: + free(mmd->afd.afhi.chunk_table); + close_listed_fds(); + mutex_destroy(mmd_mutex); + shm_detach(mmd); exit(EXIT_FAILURE); } - add_close_on_fork_list(signal_pipe); } -static unsigned init_network(void) +static void init_signal_task(void) { - int fd, ret = tcp_listen(conf.port_arg); + static struct signal_task signal_task_struct, + *st = &signal_task_struct; + + st->task.pre_select = signal_pre_select; + st->task.post_select = signal_post_select; + sprintf(st->task.status, "signal task"); + + PARA_NOTICE_LOG("setting up signal handling\n"); + st->fd = para_signal_init(); /* always successful */ + para_install_sighandler(SIGINT); + para_install_sighandler(SIGTERM); + para_install_sighandler(SIGHUP); + para_install_sighandler(SIGCHLD); + para_sigaction(SIGPIPE, SIG_IGN); + add_close_on_fork_list(st->fd); + register_task(&st->task); +} - if (ret < 0) - goto err; - fd = ret; - ret = mark_fd_nonblocking(fd); - if (ret < 0) - goto err; - add_close_on_fork_list(fd); /* child doesn't need the listener */ - return fd; -err: - PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret)); - exit(EXIT_FAILURE); +static void command_pre_select(struct sched *s, struct task *t) +{ + struct server_command_task *sct = container_of(t, struct server_command_task, task); + para_fd_set(sct->listen_fd, &s->rfds, &s->max_fileno); } -static void init_random_seed(void) +static void command_post_select(struct sched *s, struct task *t) { - int fd, ret = -1; - unsigned int seed; - size_t len = sizeof(unsigned int); + struct server_command_task *sct = container_of(t, struct server_command_task, task); + + int new_fd, ret, i; + char *peer_name; + pid_t child_pid; + uint32_t *chunk_table; - fd = open("/dev/urandom", O_RDONLY); - if (fd < 0) + if (!FD_ISSET(sct->listen_fd, &s->rfds)) + return; + ret = para_accept(sct->listen_fd, NULL, 0); + if (ret < 0) goto out; - ret = -2; - if (read(fd, &seed, len) != len) + new_fd = ret; + peer_name = remote_name(new_fd); + PARA_INFO_LOG("got connection from %s, forking\n", peer_name); + mmd->num_connects++; + mmd->active_connections++; + /* + * The chunk table is a pointer located in the mmd struct that points + * to dynamically allocated memory, i.e. it must be freed by the parent + * and the child. However, as the mmd struct is in a shared memory + * area, there's no guarantee that after the fork this pointer is still + * valid in child context. As it is not used in the child anyway, we + * save it to a local variable before the fork and free the memory via + * that copy in the child directly after the fork. + */ + chunk_table = mmd->afd.afhi.chunk_table; + child_pid = fork(); + if (child_pid < 0) { + ret = -ERRNO_TO_PARA_ERROR(errno); goto out; - srandom(seed); - ret = 1; -out: - if (fd >= 0) - close(fd); - if (ret > 0) + } + if (child_pid) { + close(new_fd); + /* parent keeps accepting connections */ return; - PARA_EMERG_LOG("can not seed pseudo random generator (ret = %d)\n", - ret); - exit(EXIT_FAILURE); + } + /* mmd might already have changed at this point */ + free(chunk_table); + alarm(ALARM_TIMEOUT); + close_listed_fds(); + para_signal_shutdown(); + /* + * put info on who we are serving into argv[0] to make + * client ip visible in top/ps + */ + for (i = sct->argc - 1; i >= 0; i--) + memset(sct->argv[i], 0, strlen(sct->argv[i])); + sprintf(sct->argv[0], "para_server (serving %s)", peer_name); + return handle_connect(new_fd, peer_name); +out: + if (ret < 0) + PARA_CRIT_LOG("%s\n", para_strerror(-ret)); } -uint32_t afs_socket_cookie; -int afs_socket; -static pid_t afs_pid; +static void init_server_command_task(int argc, char **argv) +{ + int ret; + static struct server_command_task server_command_task_struct, + *sct = &server_command_task_struct; + + PARA_NOTICE_LOG("initializing tcp command socket\n"); + sct->task.pre_select = command_pre_select; + sct->task.post_select = command_post_select; + sct->argc = argc; + sct->argv = argv; + ret = para_listen(AF_UNSPEC, IPPROTO_TCP, conf.port_arg); + if (ret < 0) + goto err; + sct->listen_fd = ret; + ret = mark_fd_nonblocking(sct->listen_fd); + if (ret < 0) + goto err; + add_close_on_fork_list(sct->listen_fd); /* child doesn't need the listener */ + register_task(&sct->task); + return; +err: + PARA_EMERG_LOG("%s\n", para_strerror(-ret)); + exit(EXIT_FAILURE); +} -static void init_afs(void) +static int init_afs(void) { int ret, afs_server_socket[2]; ret = socketpair(PF_UNIX, SOCK_DGRAM, 0, afs_server_socket); if (ret < 0) exit(EXIT_FAILURE); - afs_socket_cookie = para_random((uint32_t)-1); - afs_pid = fork(); - if (afs_pid < 0) + get_random_bytes_or_die((unsigned char *)&afs_socket_cookie, + sizeof(afs_socket_cookie)); + mmd->afs_pid = fork(); + if (mmd->afs_pid < 0) exit(EXIT_FAILURE); - if (!afs_pid) { /* child (afs) */ + if (!mmd->afs_pid) { /* child (afs) */ close(afs_server_socket[0]); afs_init(afs_socket_cookie, afs_server_socket[1]); } close(afs_server_socket[1]); - afs_socket = afs_server_socket[0]; - ret = mark_fd_nonblocking(afs_socket); + ret = mark_fd_nonblocking(afs_server_socket[0]); if (ret < 0) exit(EXIT_FAILURE); - add_close_on_fork_list(afs_socket); - PARA_INFO_LOG("afs_socket: %d, afs_socket_cookie: %u\n", afs_socket, - (unsigned) afs_socket_cookie); + add_close_on_fork_list(afs_server_socket[0]); + PARA_INFO_LOG("afs_socket: %d, afs_socket_cookie: %u\n", + afs_server_socket[0], (unsigned) afs_socket_cookie); + return afs_server_socket[0]; } +__noreturn static void tmp_sigchld_handler(__a_unused int s) +{ + PARA_EMERG_LOG("caught early SIGCHLD\n"); + exit(EXIT_FAILURE); +} -static unsigned server_init(int argc, char **argv) +static void server_init(int argc, char **argv) { - /* connector's address information */ - int sockfd; + struct server_cmdline_parser_params params = { + .override = 0, + .initialize = 1, + .check_required = 0, + .check_ambiguity = 0, + .print_errors = 1 + }; + int afs_socket; - init_random_seed(); + valid_fd_012(); + init_random_seed_or_die(); /* parse command line options */ - server_cmdline_parser(argc, argv, &conf); + server_cmdline_parser_ext(argc, argv, &conf, ¶ms); HANDLE_VERSION_FLAG("server", conf); - para_drop_privileges(conf.user_arg, conf.group_arg); + drop_privileges_or_die(conf.user_arg, conf.group_arg); /* parse config file, open log and set defaults */ - parse_config(0); - log_welcome("para_server", conf.loglevel_arg); - shm_init(); /* init mmd struct */ + parse_config_or_die(0); + log_welcome("para_server"); + init_ipc_or_die(); /* init mmd struct and mmd->lock */ + /* make sure, the global now pointer is uptodate */ + gettimeofday(now, NULL); server_uptime(UPTIME_SET); /* reset server uptime */ init_user_list(user_list_file); /* become daemon */ if (conf.daemon_given) - daemon_init(); + daemonize(); PARA_NOTICE_LOG("initializing audio format handlers\n"); afh_init(); - PARA_NOTICE_LOG("initializing virtual streaming system\n"); - vss_init(); - mmd->server_pid = getpid(); - setup_signal_handling(); + + /* + * Although afs uses its own signal handling we must ignore SIGUSR1 + * _before_ the afs child process gets born by init_afs() below. It's + * racy to do this in the child because the parent might send SIGUSR1 + * before the child gets a chance to ignore this signal -- only the + * good die young. + */ + para_sigaction(SIGUSR1, SIG_IGN); + /* + * We have to install a SIGCHLD handler before the afs process is being + * forked off. Otherwise, para_server does not notice if afs dies before + * the SIGCHLD handler has been installed by init_signal_task() below. + */ + para_sigaction(SIGCHLD, tmp_sigchld_handler); PARA_NOTICE_LOG("initializing the audio file selector\n"); - init_afs(); - mmd_lock(); - /* init network socket */ - PARA_NOTICE_LOG("initializing tcp command socket\n"); - sockfd = init_network(); + afs_socket = init_afs(); + init_signal_task(); + PARA_NOTICE_LOG("initializing virtual streaming system\n"); + init_vss_task(afs_socket); + init_server_command_task(argc, argv); PARA_NOTICE_LOG("server init complete\n"); - return sockfd; -} - -/* - * called when server gets SIGHUP or when client invokes hup command. - */ -static void handle_sighup(void) -{ - PARA_NOTICE_LOG("%s", "SIGHUP\n"); - close_log(logfile); /* gets reopened if necessary by parse_config */ - logfile = NULL; - parse_config(1); /* reopens log */ - init_user_list(user_list_file); /* reload user list */ - if (afs_pid) - kill(afs_pid, SIGHUP); } static void status_refresh(void) @@ -429,10 +529,12 @@ static void status_refresh(void) if (prev_events != mmd->events) goto out; if (mmd->new_vss_status_flags != mmd->vss_status_flags) - goto out; + goto out_inc_events; if (uptime / 60 != prev_uptime / 60) - goto out; - ret = 0; + goto out_inc_events; + return; +out_inc_events: + mmd->events++; out: prev_uptime = uptime; prev_events = mmd->events; @@ -444,129 +546,42 @@ out: } } +static int server_select(int max_fileno, fd_set *readfds, fd_set *writefds, + struct timeval *timeout_tv) +{ + int ret; + + status_refresh(); + mutex_unlock(mmd_mutex); + ret = para_select(max_fileno + 1, readfds, writefds, timeout_tv); + mutex_lock(mmd_mutex); + return ret; +} + /** - * the main function of para_server - * - * \param argc usual argument count - * \param argv usual argument vector + * The main function of para_server. * - * \return EXIT_SUCCESS or EXIT_FAILURE + * \param argc Usual argument count. + * \param argv Usual argument vector. * + * \return EXIT_SUCCESS or EXIT_FAILURE. */ int main(int argc, char *argv[]) { - /* listen on sock_fd, new connection on new_fd */ - int sockfd, new_fd; - struct sockaddr_in their_addr; - int i, max_fileno, ret; - pid_t chld_pid; - fd_set rfds, wfds; - struct timeval *timeout; - - valid_fd_012(); - sockfd = server_init(argc, argv); -repeat: - FD_ZERO(&rfds); - FD_ZERO(&wfds); - max_fileno = -1; - /* check socket and signal pipe in any case */ - para_fd_set(sockfd, &rfds, &max_fileno); - para_fd_set(signal_pipe, &rfds, &max_fileno); - timeout = vss_preselect(&rfds, &wfds, &max_fileno); - status_refresh(); - for (i = 0; senders[i].name; i++) { - if (senders[i].status != SENDER_ON) - continue; - if (!senders[i].pre_select) - continue; - senders[i].pre_select(&max_fileno, &rfds, &wfds); - } - mmd_unlock(); - ret = para_select(max_fileno + 1, &rfds, &wfds, timeout); - mmd_lock(); - vss_post_select(&rfds, &wfds); - if (ret < 0) - goto repeat; - for (i = 0; senders[i].name; i++) { - if (senders[i].status != SENDER_ON) - continue; - if (!senders[i].post_select) - continue; - senders[i].post_select(&rfds, &wfds); - } - vss_send_chunk(); - status_refresh(); - if (FD_ISSET(signal_pipe, &rfds)) { - int sig; - pid_t pid; - sig = para_next_signal(); - switch (sig) { - case SIGHUP: - handle_sighup(); - break; - case SIGCHLD: - for (;;) { - ret = para_reap_child(&pid); - if (ret <= 0) - break; - if (pid != afs_pid) - continue; - PARA_EMERG_LOG("fatal: afs died\n"); - goto genocide; - } - break; - /* die on sigint/sigterm. Kill all children too. */ - case SIGINT: - case SIGTERM: - PARA_EMERG_LOG("terminating on signal %d\n", sig); -genocide: - kill(0, SIGTERM); - mutex_destroy(mmd_mutex); - shm_detach(mmd); - shm_destroy(mmd_shm_id); - - exit(EXIT_FAILURE); - } - } - if (mmd->sender_cmd_data.cmd_num >= 0) { - int num = mmd->sender_cmd_data.cmd_num, - s = mmd->sender_cmd_data.sender_num; - - if (senders[s].client_cmds[num]) - senders[s].client_cmds[num](&mmd->sender_cmd_data); - mmd->sender_cmd_data.cmd_num = -1; - } - if (!FD_ISSET(sockfd, &rfds)) - goto repeat; - - new_fd = para_accept(sockfd, &their_addr, sizeof(struct sockaddr_in)); - if (new_fd < 0) - goto repeat; - PARA_INFO_LOG("got connection from %s, forking\n", - inet_ntoa(their_addr.sin_addr)); - mmd->num_connects++; - mmd->active_connections++; - random(); - chld_pid = fork(); - if (chld_pid < 0) { - PARA_CRIT_LOG("%s", "fork failed\n"); - goto repeat; - } - if (chld_pid) { - close(new_fd); - /* parent keeps accepting connections */ - goto repeat; + int ret; + static struct sched s = { + .default_timeout = { + .tv_sec = 1, + .tv_usec = 0 + }, + .select_function = server_select + }; + server_init(argc, argv); + mutex_lock(mmd_mutex); + ret = schedule(&s); + if (ret < 0) { + PARA_EMERG_LOG("%s\n", para_strerror(-ret)); + exit(EXIT_FAILURE); } - alarm(ALARM_TIMEOUT); - close_listed_fds(); - para_signal_shutdown(); - /* - * put info on who we are serving into argv[0] to make - * client ip visible in top/ps - */ - for (i = argc - 1; i >= 0; i--) - memset(argv[i], 0, strlen(argv[i])); - sprintf(argv[0], "para_server (serving %s)", - inet_ntoa(their_addr.sin_addr)); - return handle_connect(new_fd, &their_addr); + exit(EXIT_SUCCESS); }