Attachment 2827 Details for Bug 6745 – server code to see the problem

server code to see the problem

server.c (text/x-csrc), 2.25 KB, created by who on 2008-07-14 17:28:34 UTC

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Creator: who

Created: 2008-07-14 17:28:34 UTC

Size: 2.25 KB

patch

obsolete

>#include <stdio.h>
>
>#define __USE_GNU
>#include <fcntl.h>
>#include <sys/socket.h>
>#include <netdb.h>
>#include <signal.h>
>
>/*this flag will force the server to sleep*/
>int flag = 1;
>
>/*this function will handle SIGTERM signals*/
>/*it will set the flag to 0 so the server exits the sleep loop*/
>void MyTermHandler(int signo, siginfo_t *info, void *context){
>	flag = 0;
>}
>
>/*this function will handle SIGIO signals*/
>/*it shows that si_code does not have SI_SIGIO contrary to what the man pages say*/
>void MySigHandler(int signo, siginfo_t *info, void *context){
>	if(info->si_code == SI_SIGIO)
>		printf("w00t\n");
>	else
>		printf("The value of si_code is: %d\n", info->si_code);
>}
>
>int main(void){
>
>	struct sockaddr_in address;
>	struct hostent *hostname;
>	struct sigaction action;
>	int listenSocket;
>
>	/*printing the values of SI_SIGIO and SI_USER*/
>	printf("\n");
>	printf("The value of SI_SIGIO is: %d\n", SI_SIGIO);
>	printf("The value of SI_USER is: %d\n", SI_USER);
>
>	/*making the socket*/
>	if((listenSocket = socket(PF_INET, SOCK_STREAM, 0)) == -1)
>		return 1;
>
>	/*setting up the socket so it sends signals of type SIGIO to the current process*/
>	if(fcntl(listenSocket, F_SETSIG, SIGIO))
>		return 1;
>	if(fcntl(listenSocket, F_SETFL, O_ASYNC | O_NONBLOCK))
>		return 1;
>	if(fcntl(listenSocket, F_SETOWN, getpid()))
>		return 1;
>
>	/*setting up the handler for SIGIO signals*/
>	action.sa_sigaction = &MySigHandler;
>	action.sa_flags = SA_SIGINFO;
>	if(sigaction(SIGIO, &action, NULL))
>		return 1;
>
>	/*setting up the handler for SIGTERM signals*/
>	action.sa_sigaction = &MyTermHandler;
>	action.sa_flags = SA_SIGINFO;
>	if(sigaction(SIGTERM, &action, NULL))
>		return 1;
>
>	/*setting up the address to which the socket will listen*/
>	if((hostname = gethostbyname("localhost")) == NULL)
>		return 1;
>	address.sin_family = AF_INET;
>	address.sin_port = htons(60069);
>	address.sin_addr = *(struct in_addr *)hostname->h_addr;
>
>	/*binding the socket to the address*/
>	if(bind(listenSocket, (struct sockaddr *)&address, sizeof(address)))
>		return 1;
>
>	/*listening for incoming connections*/
>	if(listen(listenSocket, 20))
>		return 1;
>
>	/*sleep loop*/
>	/*sleep gets cancelled whenever a signal arrives or the time runs out*/
>	while(flag)
>		sleep(200);
>
>	/*closing the socket*/
>	if(close(listenSocket))
>		return 1;
>
>	return 0;
>}

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