//服务器端执行入口函数
int main(int argc, char*argv[]){
struct sigaction new_action, old_action;
message_data message_request;
new_action.sa_handler=catch_signals;
sigemptyset(&new_action.sa_mask);
new_action.sa_flags=0;
if ((sigaction(SIGINT, &new_action, &old_action) != 0) ||
(sigaction(SIGHUP, &new_action, &old_action) != 0) ||
(sigaction(SIGTERM, &new_action, &old_action) != 0)) {
fprintf(stderr, "Server startup error, signal catching failed\n");
exit(EXIT_FAILURE);
}
char* server_host="localhost";
char* sql_username="******";
char* sql_password="******";
char* db_name="railwaysystem";
if(!database_init(server_host, sql_username, sql_password, db_name)){
fprintf(stderr, "Server error: could not init database. \n");
sys_log("数据库连接失败.");
exit(EXIT_FAILURE);
}
sys_log("数据库连接成功.");
if(!server_start()){
sys_log("服务器启动失败.");
exit(EXIT_FAILURE);
}
sys_log("服务器启动成功.");
while(server_state){
if(read_request_from_client(&message_request)){
exec_request(message_request);
}else{
if(server_state){
fprintf(stderr, "Server ended, cannot read request from message queue. \n");
sys_log("Server ended, cannot read request from message queue.");
}
server_state=0;
}
}
database_close();
server_end();
sys_log("服务器关闭.");
exit(EXIT_SUCCESS);
}
/* The main function loops over reading from the server mqueue (which is
* actually done in the read_request_from_client function). Each time it
* gets a request, it hands the request to process_command, which handles
* - figuring out what operation the client wanted (the same switch
* statement that is in main of app_ui.c, in effect)
* - delegating to some frunction from cd_dbm.c
* - coppying some of the data from the message_db_t struct coming in from
* the client to the response, and then filling out other data depending
* on the action and the database results
* - sending the response message_db_t struct back to the client
*
* The functions that interact directly with the mqueue all live in mqueue_imp.c;
* this module provides the main loop and the "glue" between the server-side
* mqueue handling and the server-side data api.
*
* Note that the actual calls to the server-side data api from here wind up
* being identical to the actual calls to the client-side data api (the proxy)
* made from app_ui.c.
*/
int main(int argc, char *argv[]) {
struct sigaction new_action, old_action;
message_db_t mess_command;
int database_init_type = 0;
new_action.sa_handler = catch_signals;
sigemptyset(&new_action.sa_mask);
new_action.sa_flags = 0;
if ((sigaction(SIGINT, &new_action, &old_action) != 0) ||
(sigaction(SIGHUP, &new_action, &old_action) != 0) ||
(sigaction(SIGTERM, &new_action, &old_action) != 0)) {
fprintf(stderr, "Server startup error, signal catching failed\n");
exit(EXIT_FAILURE);
}
if (argc > 1) {
argv++;
if (strncmp("-i", *argv, 2) == 0) database_init_type = 1;
}
if (!database_initialize(database_init_type)) {
fprintf(stderr, "Server error: could not initialize database\n");
exit(EXIT_FAILURE);
}
if (!server_starting()) exit(EXIT_FAILURE);
while(server_running) {
if (read_request_from_client(&mess_command)) {
process_command(mess_command);
} else {
if(server_running) fprintf(stderr, "Server ended - can not \
read mqueue\n");
server_running = 0;
}
} /* while */
server_ending();
exit(EXIT_SUCCESS);
}
