-/*
- * Copyright (C) 1997 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 1997 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file server.c Paraslash's main server. */
#include "server.lsg.h"
#include "para.h"
#include "error.h"
+#include "lsu.h"
#include "crypt.h"
#include "afh.h"
#include "string.h"
#include "afs.h"
+#include "net.h"
#include "server.h"
#include "list.h"
#include "send.h"
#include "vss.h"
#include "config.h"
#include "close_on_fork.h"
-#include "net.h"
#include "daemon.h"
#include "ipc.h"
#include "fd.h"
/* 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. */
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 task responsible for server command handling. */
struct server_command_task {
/** TCP port on which para_server listens for connections. */
void parse_config_or_die(bool reload)
{
int ret;
- char *cf = NULL, *errctx = NULL, *user_list_file = NULL;
- void *map;
- size_t sz;
- int cf_argc;
- char **cf_argv;
- struct lls_parse_result *cf_lpr, *merged_lpr;
- char *home = para_homedir();
-
- daemon_close_log();
- if (OPT_GIVEN(CONFIG_FILE))
- cf = para_strdup(OPT_STRING_VAL(CONFIG_FILE));
- else
- cf = make_message("%s/.paraslash/server.conf", home);
- if (!mmd || getpid() != mmd->afs_pid) {
- if (OPT_GIVEN(USER_LIST))
- user_list_file = para_strdup(OPT_STRING_VAL(USER_LIST));
- else
- user_list_file = make_message("%s/.paraslash/server.users", home);
- }
- free(home);
- ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
- if (ret < 0) {
- if (ret != -E_EMPTY && ret != -ERRNO_TO_PARA_ERROR(ENOENT))
- goto free_cf;
- if (ret == -ERRNO_TO_PARA_ERROR(ENOENT) && OPT_GIVEN(CONFIG_FILE))
- goto free_cf;
- ret = 0;
- server_lpr = cmdline_lpr;
- goto success;
- }
- ret = lls(lls_convert_config(map, sz, NULL, &cf_argv, &errctx));
- para_munmap(map, sz);
- if (ret < 0)
- goto free_cf;
- cf_argc = ret;
- ret = lls(lls_parse(cf_argc, cf_argv, CMD_PTR, &cf_lpr, &errctx));
- lls_free_argv(cf_argv);
- if (ret < 0)
- goto free_cf;
- if (reload) /* config file overrides command line */
- ret = lls(lls_merge(cf_lpr, cmdline_lpr, CMD_PTR, &merged_lpr,
- &errctx));
- else /* command line options overrride config file options */
- ret = lls(lls_merge(cmdline_lpr, cf_lpr, CMD_PTR, &merged_lpr,
- &errctx));
- lls_free_parse_result(cf_lpr, CMD_PTR);
- if (ret < 0)
- goto free_cf;
+ unsigned flags = MCF_DONT_FREE;
+
if (server_lpr != cmdline_lpr)
lls_free_parse_result(server_lpr, CMD_PTR);
- server_lpr = merged_lpr;
-success:
+ 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);
+ }
daemon_set_loglevel(ENUM_STRING_VAL(LOGLEVEL));
if (OPT_GIVEN(LOGFILE)) {
daemon_set_logfile(OPT_STRING_VAL(LOGFILE));
if (OPT_GIVEN(LOG_TIMING))
daemon_set_flag(DF_LOG_TIMING);
daemon_set_priority(OPT_UINT32_VAL(PRIORITY));
- if (user_list_file)
+ 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);
+ }
init_user_list(user_list_file);
- ret = 1;
-free_cf:
- free(cf);
- free(user_list_file);
- if (ret < 0) {
- if (errctx)
- PARA_ERROR_LOG("%s\n", errctx);
- free(errctx);
- PARA_EMERG_LOG("%s\n", para_strerror(-ret));
- exit(EXIT_FAILURE);
+ free(user_list_file);
}
+ return;
}
/*
PARA_NOTICE_LOG("SIGHUP\n");
parse_config_or_die(true);
- if (mmd->afs_pid)
- kill(mmd->afs_pid, SIGHUP);
+ if (afs_pid != 0)
+ kill(afs_pid, SIGHUP);
}
static int signal_post_select(struct sched *s, __a_unused void *context)
int 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);
* 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);
+ (int)afs_pid);
+ waitpid(afs_pid, NULL, 0);
cleanup:
free(mmd->afd.afhi.chunk_table);
close_listed_fds();
memset(sct->argv[i], 0, strlen(sct->argv[i]));
i = sct->argc - 1 - lls_num_inputs(cmdline_lpr);
sprintf(sct->argv[i], "para_server (serving %s)", peer_name);
- handle_connect(new_fd, peer_name);
+ handle_connect(new_fd);
/* never reached*/
out:
if (ret < 0)
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_STREAM, 0, afs_server_socket);
if (afs_pid == 0) { /* child (afs) */
int i;
+ afs_pid = getpid();
for (i = argc - 1; i >= 0; i--)
memset(argv[i], 0, strlen(argv[i]));
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");
projects / paraslash.git / blobdiff