/*
- * Copyright (C) 1997-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2008 Andre Noll <maan@systemlinux.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
-/** \file server.c Paraslash's main server */
+/** \file server.c Paraslash's main server. */
-/** \mainpage Paraslash API Reference
+/**
+ * \mainpage Paraslash API Reference
+ *
+ * Starting points for getting an overview:
+ *
+ *
+ * - The main programs: \ref server.c, \ref audiod.c, \ref client.c,
+ * \ref audioc.c, \ref fsck.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.
+ *
+ *
+ * The gory details, listed by topic:
+ *
+ * - Audio format handlers: \ref send_common.c \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,
+ * - 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,
+ * - 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,
+ * \ref afs_info \ref afh_info,
+ * - Afs tables: \ref aft.c, \ref mood.c, \ref playlist.c,
+ * \ref attribute.c, \ref score.c,
+ * - The virtual streaming system: \ref vss.c, \ref chunk_queue.c.
+ *
+ * Lower levels:
+ *
+ * - Scheduling: \ref sched.c, \ref sched.h,
+ * - Networking: \ref net.c,
+ * - File descriptors: \ref fd.c,
+ * - Signals: \ref signal.c,
+ * - Daemons: \ref daemon.c,
+ * - Strings: \ref string.c, \ref string.h,
+ * - 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:
*
- * Good starting points for reading are probably \ref audio_file_selector,
- * \ref sender, \ref receiver, \ref receiver_node, \ref filter, \ref
- * filter_node.
+ * - 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.
*
*/
+#include <signal.h>
+#include <dirent.h>
-
+#include "para.h"
+#include "error.h"
#include "server.cmdline.h"
-#include "db.h"
-#include "server.h"
+#include "afh.h"
+#include "string.h"
#include "afs.h"
+#include "server.h"
+#include "vss.h"
#include "config.h"
#include "close_on_fork.h"
+#include "list.h"
#include "send.h"
-#include "error.h"
#include "net.h"
#include "daemon.h"
-#include "string.h"
#include "ipc.h"
#include "fd.h"
+#include "sched.h"
+#include "signal.h"
+#include "user_list.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
-/* these are exported to afs.c. command.c and to all selectors */
+/**
+ * Pointer to shared memory area for communication between para_server
+ * and its children. Exported to vss.c. command.c and to afs.
+ */
struct misc_meta_data *mmd;
-/** the configuration of para_server
+
+/**
+ * The configuration of para_server
*
- * It also contains the options for all audio file selectors and all supported
- * senders.
-*/
+ * It also contains the options for the audio file selector, audio format
+ * handler and all supported senders.
+ */
struct server_args_info conf;
-char *user_list = NULL;
-extern void dccp_send_init(struct sender *);
-extern void http_send_init(struct sender *);
-extern void ortp_send_init(struct sender *);
-
-/* TODO: This is better handled by autoconf */
-/** the list of supported audio file selectors */
-struct audio_file_selector selectors[] = {
- {
- .name = "random",
- .init = random_selector_init,
- .update_audio_file = NULL,
- },
- {
- .name = "playlist",
- .init = playlist_selector_init,
- .update_audio_file = NULL,
- .pre_select = NULL,
- .post_select = NULL,
- },
-#ifdef HAVE_MYSQL
- {
- .name = "mysql",
- .init = mysql_selector_init,
- .update_audio_file = NULL,
- .pre_select = NULL,
- .post_select = NULL,
- },
-#endif
- {
- .name = NULL,
- }
-};
-/** 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;
+static int mmd_shm_id;
+
+
+/** 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;
+};
/**
- * para_server's log function
+ * Para_server's log function.
*
- * \param ll the log level
- * \param fmt the format string describing the log message
+ * \param ll The log level.
+ * \param fmt The format string describing the log message.
*/
void para_log(int ll, const char* fmt,...)
{
fprintf(outfd, "%i: ", ll);
mypid = getpid();
if (conf.loglevel_arg <= INFO)
- fprintf(outfd, "(%d) ", mypid);
+ fprintf(outfd, "(%d) ", (int)mypid);
va_start(argp, fmt);
vfprintf(outfd, fmt, argp);
va_end(argp);
goto err_out;
mmd_mutex = ret;
- mmd->selector_num = 0;
mmd->num_played = 0;
mmd->num_commands = 0;
mmd->events = 0;
mmd->num_connects = 0;
mmd->active_connections = 0;
- strcpy(mmd->filename, "(none)");
- mmd->audio_format = -1;
- mmd->afs_status_flags = AFS_NEXT;
- mmd->new_afs_status_flags = AFS_NEXT;
- mmd->sender_cmd_data.cmd_num = -1;
+ mmd->vss_status_flags = VSS_NEXT;
+ mmd->new_vss_status_flags = VSS_NEXT;
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
- *
- * \sa semop(2), struct misc_meta_data
- */
-void mmd_lock(void)
-{
- mutex_lock(mmd_mutex);
-}
-
-/**
- * unlock the shared memory area containing the mmd struct
- *
- * \sa semop(2), struct misc_meta_data
- */
-
-void mmd_unlock(void)
-{
- mutex_unlock(mmd_mutex);
-}
-
static void parse_config(int override)
{
char *home = para_homedir();
char *cf;
if (conf.config_file_given)
- cf = conf.config_file_arg;
+ cf = para_strdup(conf.config_file_arg);
else
cf = make_message("%s/.paraslash/server.conf", home);
- free(user_list);
+ free(user_list_file);
if (!conf.user_list_given)
- user_list = make_message("%s/.paraslash/server.users", home);
+ user_list_file = make_message("%s/.paraslash/server.users", home);
else
- user_list = para_strdup(conf.user_list_arg);
+ user_list_file = para_strdup(conf.user_list_arg);
ret = stat(cf, &statbuf);
if (ret && conf.config_file_given) {
ret = -1;
}
if (!ret) {
int tmp = conf.daemon_given;
- server_cmdline_parser_configfile(cf, &conf, override, 0, 0);
+ struct server_cmdline_parser_params params = {
+ .override = override,
+ .initialize = 0,
+ .check_required = 1,
+ .check_ambiguity = 0,
+ .print_errors = 1
+ };
+ 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)
logfile = open_log(conf.logfile_arg);
ret = 1;
free(home);
if (ret > 0)
return;
- free(user_list);
- user_list = NULL;
+ free(user_list_file);
+ user_list_file = NULL;
exit(EXIT_FAILURE);
}
-static void setup_signal_handling(void)
+static void signal_pre_select(struct sched *s, struct task *t)
+{
+ 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)
{
- int ret = 0;
-
- signal_pipe = para_signal_init();
- PARA_NOTICE_LOG("%s", "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");
+ PARA_NOTICE_LOG("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 (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");
+ goto genocide;
+ }
+ break;
+ /* die on sigint/sigterm. Kill all children too. */
+ case SIGINT:
+ case SIGTERM:
+ PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
+genocide:
+ kill(0, SIGTERM);
+ mutex_destroy(mmd_mutex);
+ shm_detach(mmd);
+ shm_destroy(mmd_shm_id);
+
exit(EXIT_FAILURE);
}
}
-static void init_selector(void)
+static void init_signal_task(void)
{
- int i, ret;
-
- mmd->selector_change = -1; /* no change nec., set to new num by com_chs */
- if (!conf.selector_given)
- goto random;
- for (i = 0; selectors[i].name; i++) {
- if (strcmp(selectors[i].name, conf.selector_arg))
- continue;
- PARA_NOTICE_LOG("initializing %s audio file selector\n",
- selectors[i].name);
- ret = selectors[i].init(&selectors[i]);
- if (ret < 0) {
- PARA_WARNING_LOG("%s", PARA_STRERROR(-ret));
- break;
- }
- mmd->selector_num = i;
+ 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");
+
+ st->fd = para_signal_init(); /* always successful */
+
+ PARA_NOTICE_LOG("setting up signal handlers\n");
+ if (para_install_sighandler(SIGINT) < 0)
+ goto err;
+ if (para_install_sighandler(SIGTERM) < 0)
+ goto err;
+ if (para_install_sighandler(SIGHUP) < 0)
+ goto err;
+ if (para_install_sighandler(SIGCHLD) < 0)
+ goto err;
+ if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
+ goto err;
+ if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)
+ goto err;
+ add_close_on_fork_list(st->fd);
+ register_task(&st->task);
+ return;
+err:
+ PARA_EMERG_LOG("could not install signal handlers\n");
+ 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 command_post_select(struct sched *s, struct task *t)
+{
+ 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;
+
+ if (!FD_ISSET(sct->listen_fd, &s->rfds))
+ return;
+ ret = para_accept(sct->listen_fd, NULL, 0);
+ if (ret < 0)
+ goto out;
+ 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++;
+ random();
+ child_pid = fork();
+ if (child_pid < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ goto out;
+ }
+ if (child_pid) {
+ close(new_fd);
+ /* parent keeps accepting connections */
return;
}
- PARA_WARNING_LOG("%s", "falling back to the random selector\n");
-random:
- mmd->selector_num = 0;
- selectors[0].init(&selectors[0]); /* always successful */
+ 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));
}
-static unsigned init_network(void)
+static void init_server_command_task(int argc, char **argv)
{
- int fd, ret = init_tcp_socket(conf.port_arg);
-
+ 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;
- fd = ret;
- ret = mark_fd_nonblock(fd);
+ sct->listen_fd = ret;
+ ret = mark_fd_nonblocking(sct->listen_fd);
if (ret < 0)
goto err;
- return fd;
+ 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));
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
}
static void init_random_seed(void)
{
- int fd, ret = -1, len = sizeof(unsigned int);
unsigned int seed;
+ int fd, ret = para_open("/dev/urandom", O_RDONLY, 0);
- fd = open("/dev/urandom", O_RDONLY);
- if (fd < 0)
+ if (ret < 0)
+ goto err;
+ fd = ret;
+ ret = read(fd, &seed, sizeof(seed));
+ if (ret < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
goto out;
- ret = -2;
- if (read(fd, &seed, len) != len)
+ }
+ if (ret != sizeof(seed)) {
+ ret = -ERRNO_TO_PARA_ERROR(EIO);
goto out;
+ }
srandom(seed);
ret = 1;
out:
- if (fd >= 0)
- close(fd);
- if (ret > 0)
+ close(fd);
+ if (ret >= 0)
return;
- PARA_EMERG_LOG("can not seed pseudo random generator (ret = %d)\n",
- ret);
+err:
+ PARA_EMERG_LOG("can not seed pseudo random number generator: %s\n",
+ para_strerror(-ret));
exit(EXIT_FAILURE);
}
-static unsigned do_inits(int argc, char **argv)
+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);
+ mmd->afs_pid = fork();
+ if (mmd->afs_pid < 0)
+ exit(EXIT_FAILURE);
+ 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]);
+ ret = mark_fd_nonblocking(afs_server_socket[0]);
+ if (ret < 0)
+ exit(EXIT_FAILURE);
+ 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];
+}
+
+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;
+ valid_fd_012();
init_random_seed();
/* 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);
/* parse config file, open log and set defaults */
parse_config(0);
log_welcome("para_server", conf.loglevel_arg);
shm_init(); /* init mmd struct */
server_uptime(UPTIME_SET); /* reset server uptime */
+ init_user_list(user_list_file);
/* become daemon */
if (conf.daemon_given)
daemon_init();
- init_selector();
- PARA_NOTICE_LOG("%s", "initializing audio file sender\n");
- /* audio file sender */
- afs_init();
- mmd->server_pid = getpid();
- setup_signal_handling();
- mmd_lock();
- /* init network socket */
- PARA_NOTICE_LOG("%s", "initializing tcp command socket\n");
- sockfd = init_network();
- PARA_NOTICE_LOG("%s", "init complete\n");
- return sockfd;
-}
-
-static void change_selector(void)
-{
- int ret, old = mmd->selector_num, new = mmd->selector_change;
-
- selectors[old].shutdown();
- ret = selectors[new].init(&selectors[new]);
- mmd->selector_change = -1; /* reset */
- if (ret >= 0) {
- mmd->selector_num = new;
- return;
- }
- /* init failed */
- PARA_ERROR_LOG("%s -- switching to the random selector\n", PARA_STRERROR(-ret));
- selectors[0].init(&selectors[0]);
- mmd->selector_num = 0;
-}
-
-/*
- * 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 */
- mmd->selector_change = mmd->selector_num; /* do not change selector.. */
- change_selector(); /* .. just reload */
+ PARA_NOTICE_LOG("initializing audio format handlers\n");
+ afh_init();
+ PARA_NOTICE_LOG("initializing the audio file selector\n");
+ 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");
}
static void status_refresh(void)
if (prev_events != mmd->events)
goto out;
- if (mmd->new_afs_status_flags != mmd->afs_status_flags)
- goto out;
+ if (mmd->new_vss_status_flags != mmd->vss_status_flags)
+ 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;
- mmd->afs_status_flags = mmd->new_afs_status_flags;
+ mmd->vss_status_flags = mmd->new_vss_status_flags;
if (ret) {
- PARA_DEBUG_LOG("%d events, forcing status update, af = %d\n",
- mmd->events, mmd->audio_format);
+ PARA_DEBUG_LOG("%d events, forcing status update\n",
+ mmd->events);
killpg(0, SIGUSR1);
}
}
-/*
- * MAIN
- */
-int main(int argc, char *argv[])
+static int server_select(int max_fileno, fd_set *readfds, fd_set *writefds,
+ struct timeval *timeout_tv)
{
- /* 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;
+ int ret;
- valid_fd_012();
- sockfd = do_inits(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 = afs_preselect();
- 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);
- }
- if (selectors[mmd->selector_num].pre_select) {
- ret = selectors[mmd->selector_num].pre_select(&rfds, &wfds);
- max_fileno = PARA_MAX(max_fileno, ret);
- }
- mmd_unlock();
- ret = para_select(max_fileno + 1, &rfds, &wfds, timeout);
- mmd_lock();
- if (mmd->selector_change >= 0)
- change_selector();
- if (selectors[mmd->selector_num].post_select)
- selectors[mmd->selector_num].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);
- }
- afs_send_chunk();
status_refresh();
- if (FD_ISSET(signal_pipe, &rfds)) {
- int sig;
- sig = para_next_signal();
- switch (sig) {
- case SIGHUP:
- handle_sighup();
- break;
- case SIGCHLD:
- para_reap_children();
- break;
- /* die on sigint/sigterm. Kill all children too. */
- case SIGINT:
- case SIGTERM:
- PARA_EMERG_LOG("terminating on signal %d\n", sig);
- kill(0, SIGTERM);
- selectors[mmd->selector_num].shutdown();
- 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;
+ mutex_unlock(mmd_mutex);
+ ret = para_select(max_fileno + 1, readfds, writefds, timeout_tv);
+ mutex_lock(mmd_mutex);
+ return ret;
+}
- 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;
+/**
+ * The main function of para_server.
+ *
+ * \param argc Usual argument count.
+ * \param argv Usual argument vector.
+ *
+ * \return EXIT_SUCCESS or EXIT_FAILURE.
+ */
+int main(int argc, char *argv[])
+{
+ 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();
- close(sockfd); /* child doesn't need the listener */
- /*
- * 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);
}
projects / paraslash.git / blobdiff