X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=server.c;h=6370cefd086d8351f91e25c411142ba8fea4f65a;hp=3118a3a0404c67b1663574125002f7ddf7cb87cc;hb=3622134825eb94882a8e99acc0ee1889fc0169d6;hpb=ce231275f1e5368aca092cf207bba8fe58015822 diff --git a/server.c b/server.c index 3118a3a0..6370cefd 100644 --- a/server.c +++ b/server.c @@ -1,15 +1,11 @@ -/* - * Copyright (C) 1997 Andre Noll - * - * Licensed under the GPL v2. For licencing details see COPYING. - */ +/* Copyright (C) 1997 Andre Noll , see file COPYING. */ /** \file server.c Paraslash's main server. */ /** * \mainpage Main data structures and selected APIs: * - * - Server: \ref server_command, \ref sender, + * - Senders: \ref sender, * - Audio file selector: \ref afs_info, \ref afs_table, * - Audio format handler: \ref audio_format_handler, \ref afh_info * - Receivers/filters/writers: \ref receiver, \ref receiver_node, @@ -18,7 +14,7 @@ * - Buffer trees: \ref buffer_tree.h, * - Sideband API: \ref sideband.h, * - Crypto: \ref crypt.h, \ref crypt_backend.h, - * - Error subsystem: \ref error.h, \ref error2.c, + * - Error subsystem: \ref error.h, * - Inter process communication: \ref ipc.h, * - Forward error correction: \ref fec.h, * - Daemons: \ref daemon.h, @@ -40,14 +36,17 @@ #include #include #include +#include +#include "server.lsg.h" #include "para.h" #include "error.h" +#include "lsu.h" #include "crypt.h" -#include "server.cmdline.h" #include "afh.h" #include "string.h" #include "afs.h" +#include "net.h" #include "server.h" #include "list.h" #include "send.h" @@ -55,54 +54,87 @@ #include "vss.h" #include "config.h" #include "close_on_fork.h" -#include "net.h" #include "daemon.h" #include "ipc.h" #include "fd.h" #include "signal.h" #include "user_list.h" #include "color.h" -#include "ggo.h" #include "version.h" -__printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log; +/** Array of error strings. */ +DEFINE_PARA_ERRLIST; -/** Define the array of error lists needed by para_server. */ -INIT_SERVER_ERRLISTS; +__printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log; /** Shut down non-authorized connections after that many seconds. */ #define ALARM_TIMEOUT 10 /** * Pointer to shared memory area for communication between para_server - * and its children. Exported to vss.c. command.c and to afs. + * and its children. Exported to vss.c, command.c and to afs. */ struct misc_meta_data *mmd; /** - * The configuration of para_server + * The active value for all config options of para_server. * - * It also contains the options for the audio file selector, audio format - * handler and all supported senders. + * It is computed by merging the parse result of the command line options with + * the parse result of the config file. */ -struct server_args_info conf; +struct lls_parse_result *server_lpr = NULL; + +/* Command line options (no config file options). Used in handle_sighup(). */ +static struct lls_parse_result *cmdline_lpr; -/** A random value used in child context for authentication. */ +/** + * A random number used to "authenticate" the afs connection. + * + * para_server picks this number by random before it forks the afs process. The + * command handlers know this number as well and write it to the afs socket, + * together with the id of the shared memory area which contains the payload of + * the afs command. A local process has to know this number to abuse the afs + * service provided by the local socket. + */ uint32_t afs_socket_cookie; /** The mutex protecting the shared memory area containing the mmd struct. */ int mmd_mutex; -/** The file containing user information (public key, permissions). */ -static char *user_list_file = NULL; +/* Serializes log output. */ +static int log_mutex; static struct sched sched; static struct signal_task *signal_task; +/** The process id of the audio file selector process. */ +pid_t afs_pid = 0; + +/* The the main server process (parent of afs and the command handlers). */ +static pid_t server_pid; + +/** + * Tell whether the executing process is a command handler. + * + * Cleanup on exit must be performed differently for command handlers. + * + * \return True if the pid of the executing process is neither the server pid + * nor the afs pid. + */ +bool process_is_command_handler(void) +{ + pid_t pid = getpid(); + + return pid != afs_pid && pid != server_pid; +} + /** The task responsible for server command handling. */ struct server_command_task { - /** TCP port on which para_server listens for connections. */ - int listen_fd; + unsigned num_listen_fds; /* only one by default */ + /** TCP socket(s) on which para_server listens for connections. */ + int *listen_fds; + /* File descriptor for the accepted socket. */ + int child_fd; /** Copied from para_server's main function. */ int argc; /** Argument vector passed to para_server's main function. */ @@ -124,9 +156,17 @@ char *server_get_tasks(void) return get_task_list(&sched); } -/* - * setup shared memory area and get mutex for locking - */ +static void pre_log_hook(void) +{ + mutex_lock(log_mutex); +} + +static void post_log_hook(void) +{ + mutex_unlock(log_mutex); +} + +/* Setup shared memory area and init mutexes */ static void init_ipc_or_die(void) { void *shm; @@ -145,6 +185,10 @@ static void init_ipc_or_die(void) if (ret < 0) goto err_out; mmd_mutex = ret; + ret = mutex_new(); + if (ret < 0) + goto destroy_mmd_mutex; + log_mutex = ret; mmd->num_played = 0; mmd->num_commands = 0; @@ -154,6 +198,8 @@ static void init_ipc_or_die(void) mmd->vss_status_flags = VSS_NEXT; mmd->new_vss_status_flags = VSS_NEXT; return; +destroy_mmd_mutex: + mutex_destroy(mmd_mutex); err_out: PARA_EMERG_LOG("%s\n", para_strerror(-ret)); exit(EXIT_FAILURE); @@ -162,67 +208,59 @@ err_out: /** * (Re-)read the server configuration files. * - * \param override Passed to gengetopt to activate the override feature. + * \param reload Whether config file overrides command line. * - * This function also re-opens the logfile and sets the global \a - * user_list_file variable. + * This function also re-opens the logfile and the user list. On SIGHUP it is + * called from both server and afs context. */ -void parse_config_or_die(int override) +void parse_config_or_die(bool reload) { - char *home = para_homedir(); int ret; - char *cf; - - daemon_close_log(); - if (conf.config_file_given) - cf = para_strdup(conf.config_file_arg); - else - cf = make_message("%s/.paraslash/server.conf", home); - free(user_list_file); - if (!conf.user_list_given) - user_list_file = make_message("%s/.paraslash/server.users", home); - else - user_list_file = para_strdup(conf.user_list_arg); - ret = file_exists(cf); - if (conf.config_file_given && !ret) { - ret = -1; - PARA_EMERG_LOG("can not read config file %s\n", cf); - goto out; - } - if (ret) { - int tmp = conf.daemon_given; - struct server_cmdline_parser_params params = { - .override = override, - .initialize = 0, - .check_required = 1, - .check_ambiguity = 0, - .print_errors = !conf.daemon_given - }; - server_cmdline_parser_config_file(cf, &conf, ¶ms); - daemon_set_loglevel(conf.loglevel_arg); - conf.daemon_given = tmp; + unsigned flags = MCF_DONT_FREE; + + if (server_lpr != cmdline_lpr) + lls_free_parse_result(server_lpr, CMD_PTR); + server_lpr = cmdline_lpr; + if (reload) + flags |= MCF_OVERRIDE; + ret = lsu_merge_config_file_options(OPT_STRING_VAL(CONFIG_FILE), + "server.conf", &server_lpr, CMD_PTR, server_suite, flags); + if (ret < 0) { + PARA_EMERG_LOG("failed to parse config file: %s\n", + para_strerror(-ret)); + exit(EXIT_FAILURE); } - if (conf.logfile_given) { - daemon_set_logfile(conf.logfile_arg); + daemon_set_loglevel(ENUM_STRING_VAL(LOGLEVEL)); + if (OPT_GIVEN(LOGFILE)) { + daemon_set_logfile(OPT_STRING_VAL(LOGFILE)); daemon_open_log_or_die(); } - - daemon_init_colors_or_die(conf.color_arg, color_arg_auto, color_arg_no, - conf.logfile_given, conf.log_color_arg, conf.log_color_given); + if (daemon_init_colors_or_die(OPT_UINT32_VAL(COLOR), COLOR_AUTO, + COLOR_NO, OPT_GIVEN(LOGFILE))) { + int i; + for (i = 0; i < OPT_GIVEN(LOG_COLOR); i++) + daemon_set_log_color_or_die(lls_string_val(i, + OPT_RESULT(LOG_COLOR))); + } daemon_set_flag(DF_LOG_PID); daemon_set_flag(DF_LOG_LL); daemon_set_flag(DF_LOG_TIME); - if (conf.log_timing_given) + if (OPT_GIVEN(LOG_TIMING)) daemon_set_flag(DF_LOG_TIMING); - ret = 1; -out: - free(cf); - free(home); - if (ret > 0) - return; - free(user_list_file); - user_list_file = NULL; - exit(EXIT_FAILURE); + daemon_set_priority(OPT_UINT32_VAL(PRIORITY)); + if (!reload || getpid() != afs_pid) { + char *user_list_file; + if (OPT_GIVEN(USER_LIST)) + user_list_file = para_strdup(OPT_STRING_VAL(USER_LIST)); + else { + char *home = para_homedir(); + user_list_file = make_message("%s/.paraslash/server.users", home); + free(home); + } + user_list_init(user_list_file); + free(user_list_file); + } + return; } /* @@ -230,17 +268,21 @@ out: */ 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); + parse_config_or_die(true); + if (afs_pid != 0) + kill(afs_pid, SIGHUP); } static int signal_post_select(struct sched *s, __a_unused void *context) { - int signum = para_next_signal(&s->rfds); + int ret, signum; + ret = task_get_notification(signal_task->task); + if (ret < 0) + return ret; + signum = para_next_signal(&s->rfds); switch (signum) { case 0: return 0; @@ -250,10 +292,10 @@ static int signal_post_select(struct sched *s, __a_unused void *context) case SIGCHLD: for (;;) { pid_t pid; - int ret = para_reap_child(&pid); + ret = para_reap_child(&pid); if (ret <= 0) break; - if (pid != mmd->afs_pid) + if (pid != afs_pid) continue; PARA_EMERG_LOG("fatal: afs died\n"); kill(0, SIGTERM); @@ -266,27 +308,22 @@ static int signal_post_select(struct sched *s, __a_unused void *context) PARA_EMERG_LOG("terminating on signal %d\n", 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 + * We must wait for all of our children to die. For the afs + * process or a command handler 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); + PARA_INFO_LOG("waiting for child processes to die\n"); + mutex_unlock(mmd_mutex); + while (wait(NULL) != -1 || errno != ECHILD) + ; /* still at least one child alive */ + mutex_lock(mmd_mutex); cleanup: free(mmd->afd.afhi.chunk_table); - close_listed_fds(); - mutex_destroy(mmd_mutex); - shm_detach(mmd); - exit(EXIT_FAILURE); + task_notify_all(s, E_DEADLY_SIGNAL); + return -E_DEADLY_SIGNAL; } return 0; } @@ -311,24 +348,24 @@ static void init_signal_task(void) static void command_pre_select(struct sched *s, void *context) { + unsigned n; struct server_command_task *sct = context; - para_fd_set(sct->listen_fd, &s->rfds, &s->max_fileno); + + for (n = 0; n < sct->num_listen_fds; n++) + para_fd_set(sct->listen_fds[n], &s->rfds, &s->max_fileno); } -static int command_post_select(struct sched *s, void *context) +static int command_task_accept(unsigned listen_idx, struct sched *s, + struct server_command_task *sct) { - struct server_command_task *sct = context; - int new_fd, ret, i; char *peer_name; pid_t child_pid; uint32_t *chunk_table; - ret = para_accept(sct->listen_fd, &s->rfds, NULL, 0, &new_fd); + ret = para_accept(sct->listen_fds[listen_idx], &s->rfds, NULL, 0, &new_fd); if (ret <= 0) goto out; - peer_name = remote_name(new_fd); - PARA_INFO_LOG("got connection from %s, forking\n", peer_name); mmd->num_connects++; mmd->active_connections++; /* @@ -354,49 +391,110 @@ static int command_post_select(struct sched *s, void *context) /* parent keeps accepting connections */ return 0; } + peer_name = remote_name(new_fd); + PARA_INFO_LOG("accepted connection from %s\n", peer_name); /* mmd might already have changed at this point */ free(chunk_table); - alarm(ALARM_TIMEOUT); - close_listed_fds(); - signal_shutdown(signal_task); + sct->child_fd = new_fd; /* * 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); - handle_connect(new_fd, peer_name); - /* never reached*/ + i = sct->argc - 1 - lls_num_inputs(cmdline_lpr); + sprintf(sct->argv[i], "para_server (serving %s)", peer_name); + /* ask other tasks to terminate */ + task_notify_all(s, E_CHILD_CONTEXT); + /* + * After we return, the scheduler calls server_select() with a minimal + * timeout value, because the remaining tasks have a notification + * pending. Next it calls the ->post_select method of these tasks, + * which will return negative in view of the notification. This causes + * schedule() to return as there are no more runnable tasks. + * + * Note that semaphores are not inherited across a fork(), so we don't + * hold the lock at this point. Since server_select() drops the lock + * prior to calling para_select(), we need to acquire it here. + */ + mutex_lock(mmd_mutex); + return -E_CHILD_CONTEXT; out: if (ret < 0) PARA_CRIT_LOG("%s\n", para_strerror(-ret)); return 0; } -static void init_server_command_task(int argc, char **argv) +static int command_post_select(struct sched *s, void *context) { + struct server_command_task *sct = context; + unsigned n; int ret; - static struct server_command_task server_command_task_struct, - *sct = &server_command_task_struct; + + ret = task_get_notification(sct->task); + if (ret < 0) + return ret; + for (n = 0; n < sct->num_listen_fds; n++) { + ret = command_task_accept(n, s, sct); + if (ret < 0) { + free(sct->listen_fds); + return ret; + } + } + return 0; +} + +static void init_server_command_task(struct server_command_task *sct, + int argc, char **argv) +{ + int ret; + unsigned n; + uint32_t port = OPT_UINT32_VAL(PORT); PARA_NOTICE_LOG("initializing tcp command socket\n"); + sct->child_fd = -1; sct->argc = argc; sct->argv = argv; - ret = para_listen_simple(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 */ + if (!OPT_GIVEN(LISTEN_ADDRESS)) { + sct->num_listen_fds = 1; + sct->listen_fds = para_malloc(sizeof(int)); + ret = para_listen_simple(IPPROTO_TCP, port); + if (ret < 0) + goto err; + sct->listen_fds[0] = ret; + } else { + sct->num_listen_fds = OPT_GIVEN(LISTEN_ADDRESS); + sct->listen_fds = para_malloc(sct->num_listen_fds * sizeof(int)); + for (n = 0; n < OPT_GIVEN(LISTEN_ADDRESS); n++) { + const char *arg; + arg = lls_string_val(n, OPT_RESULT(LISTEN_ADDRESS)); + ret = para_listen(IPPROTO_TCP, arg, port); + if (ret < 0) + goto err; + sct->listen_fds[n] = ret; + } + } + for (n = 0; n < sct->num_listen_fds; n++) { + ret = mark_fd_nonblocking(sct->listen_fds[n]); + if (ret < 0) + goto err; + /* child doesn't need the listener */ + add_close_on_fork_list(sct->listen_fds[n]); + } + sct->task = task_register(&(struct task_info) { .name = "server command", .pre_select = command_pre_select, .post_select = command_post_select, .context = sct, }, &sched); + /* + * Detect whether the abstract Unix domain socket space is supported, + * but do not create the socket. We check this once in server context + * so that the command handlers inherit this bit of information and + * don't need to check again. + */ + create_local_socket(NULL); return; err: PARA_EMERG_LOG("%s\n", para_strerror(-ret)); @@ -406,9 +504,9 @@ err: static int init_afs(int argc, char **argv) { int ret, afs_server_socket[2]; - pid_t afs_pid; + char c; - ret = socketpair(PF_UNIX, SOCK_DGRAM, 0, afs_server_socket); + ret = socketpair(PF_UNIX, SOCK_STREAM, 0, afs_server_socket); if (ret < 0) exit(EXIT_FAILURE); get_random_bytes_or_die((unsigned char *)&afs_socket_cookie, @@ -418,14 +516,22 @@ static int init_afs(int argc, char **argv) exit(EXIT_FAILURE); if (afs_pid == 0) { /* child (afs) */ int i; + + afs_pid = getpid(); + crypt_shutdown(); + user_list_deplete(); for (i = argc - 1; i >= 0; i--) memset(argv[i], 0, strlen(argv[i])); - sprintf(argv[0], "para_server (afs)"); + i = argc - lls_num_inputs(cmdline_lpr) - 1; + sprintf(argv[i], "para_server (afs)"); close(afs_server_socket[0]); - afs_init(afs_socket_cookie, afs_server_socket[1]); + afs_init(afs_server_socket[1]); } - mmd->afs_pid = afs_pid; close(afs_server_socket[1]); + if (read(afs_server_socket[0], &c, 1) <= 0) { + PARA_EMERG_LOG("early afs exit\n"); + exit(EXIT_FAILURE); + } ret = mark_fd_nonblocking(afs_server_socket[0]); if (ret < 0) exit(EXIT_FAILURE); @@ -435,44 +541,48 @@ static int init_afs(int argc, char **argv) return afs_server_socket[0]; } -__noreturn static void print_help_and_die(void) +static void handle_help_flags(void) { - struct ggo_help h = DEFINE_GGO_HELP(server); - bool d = conf.detailed_help_given; + char *help; + bool d = OPT_GIVEN(DETAILED_HELP); - ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS); - exit(0); + if (d) + help = lls_long_help(CMD_PTR); + else if (OPT_GIVEN(HELP)) + help = lls_short_help(CMD_PTR); + else + return; + printf("%s\n", help); + free(help); + exit(EXIT_SUCCESS); } -static void server_init(int argc, char **argv) +static void server_init(int argc, char **argv, struct server_command_task *sct) { - struct server_cmdline_parser_params params = { - .override = 0, - .initialize = 1, - .check_required = 0, - .check_ambiguity = 0, - .print_errors = 1 - }; - int afs_socket; + int ret, afs_socket, daemon_pipe = -1; + char *errctx; valid_fd_012(); - init_random_seed_or_die(); /* parse command line options */ - server_cmdline_parser_ext(argc, argv, &conf, ¶ms); - daemon_set_loglevel(conf.loglevel_arg); - version_handle_flag("server", conf.version_given); - if (conf.help_given || conf.detailed_help_given) - print_help_and_die(); - daemon_drop_privileges_or_die(conf.user_arg, conf.group_arg); - /* parse config file, open log and set defaults */ - parse_config_or_die(0); + ret = lls(lls_parse(argc, argv, CMD_PTR, &cmdline_lpr, &errctx)); + if (ret < 0) + goto fail; + server_lpr = cmdline_lpr; + daemon_set_loglevel(ENUM_STRING_VAL(LOGLEVEL)); + daemon_drop_privileges_or_die(OPT_STRING_VAL(USER), + OPT_STRING_VAL(GROUP)); + version_handle_flag("server", OPT_GIVEN(VERSION)); + handle_help_flags(); + parse_config_or_die(false); + /* become daemon */ + if (OPT_GIVEN(DAEMON)) + daemon_pipe = daemonize(true /* parent waits for SIGTERM */); + server_pid = getpid(); + crypt_init(); daemon_log_welcome("server"); - init_ipc_or_die(); /* init mmd struct and mmd->lock */ + init_ipc_or_die(); /* init mmd struct, mmd and log mutex */ daemon_set_start_time(); - init_user_list(user_list_file); - /* become daemon */ - if (conf.daemon_given) - daemonize(true /* parent waits for SIGTERM */); + daemon_set_hooks(pre_log_hook, post_log_hook); PARA_NOTICE_LOG("initializing audio format handlers\n"); afh_init(); @@ -480,27 +590,37 @@ static void server_init(int argc, char **argv) * 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 block SIGCHLD before the afs process is being forked off. - * Otherwise, para_server does not notice if afs dies before the + * before the child gets a chance to ignore this signal. + * + * We also have to block SIGCHLD before the afs process is created + * because otherwise para_server does not notice if afs dies before the * SIGCHLD handler has been installed for the parent process by * init_signal_task() below. */ + para_sigaction(SIGUSR1, SIG_IGN); para_block_signal(SIGCHLD); PARA_NOTICE_LOG("initializing the audio file selector\n"); afs_socket = init_afs(argc, argv); init_signal_task(); para_unblock_signal(SIGCHLD); PARA_NOTICE_LOG("initializing virtual streaming system\n"); - init_vss_task(afs_socket, &sched); - init_server_command_task(argc, argv); - if (conf.daemon_given) - kill(getppid(), SIGTERM); + vss_init(afs_socket, &sched); + init_server_command_task(sct, argc, argv); + if (daemon_pipe >= 0) { + if (write(daemon_pipe, "\0", 1) < 0) { + PARA_EMERG_LOG("daemon_pipe: %s", strerror(errno)); + exit(EXIT_FAILURE); + } + close(daemon_pipe); + } PARA_NOTICE_LOG("server init complete\n"); + return; +fail: + assert(ret < 0); + if (errctx) + PARA_ERROR_LOG("%s\n", errctx); + PARA_EMERG_LOG("%s\n", para_strerror(-ret)); + exit(EXIT_FAILURE); } static void status_refresh(void) @@ -521,7 +641,7 @@ out: prev_uptime = uptime; prev_events = mmd->events; mmd->vss_status_flags = mmd->new_vss_status_flags; - PARA_DEBUG_LOG("%d events, forcing status update\n", mmd->events); + PARA_DEBUG_LOG("%u events, forcing status update\n", mmd->events); killpg(0, SIGUSR1); } @@ -537,6 +657,21 @@ static int server_select(int max_fileno, fd_set *readfds, fd_set *writefds, return ret; } +/** + * Deallocate all lopsub parse results. + * + * The server allocates a parse result for command line options and optionally + * a second parse result for the effective configuration, defined by merging + * the command line options with the options stored in the configuration file. + * This function frees both structures. + */ +void free_lpr(void) +{ + lls_free_parse_result(server_lpr, CMD_PTR); + if (server_lpr != cmdline_lpr) + lls_free_parse_result(cmdline_lpr, CMD_PTR); +} + /** * The main function of para_server. * @@ -548,17 +683,38 @@ static int server_select(int max_fileno, fd_set *readfds, fd_set *writefds, int main(int argc, char *argv[]) { int ret; + struct server_command_task server_command_task_struct, + *sct = &server_command_task_struct; sched.default_timeout.tv_sec = 1; sched.select_function = server_select; - server_init(argc, argv); + server_init(argc, argv, sct); mutex_lock(mmd_mutex); ret = schedule(&sched); + /* + * We hold the mmd lock: it was re-acquired in server_select() + * after the select call. + */ + mutex_unlock(mmd_mutex); sched_shutdown(&sched); - if (ret < 0) { - PARA_EMERG_LOG("%s\n", para_strerror(-ret)); - exit(EXIT_FAILURE); + crypt_shutdown(); + signal_shutdown(signal_task); + if (!process_is_command_handler()) { /* parent (server) */ + mutex_destroy(mmd_mutex); + daemon_set_hooks(NULL, NULL); /* only one process remaining */ + mutex_destroy(log_mutex); + deplete_close_on_fork_list(); + if (ret < 0) + PARA_EMERG_LOG("%s\n", para_strerror(-ret)); + } else { + alarm(ALARM_TIMEOUT); + close_listed_fds(); + ret = handle_connect(sct->child_fd); } - exit(EXIT_SUCCESS); + vss_shutdown(); + shm_detach(mmd); + user_list_deplete(); + free_lpr(); + exit(ret < 0? EXIT_FAILURE : EXIT_SUCCESS); }