146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
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#include "../basic.h"
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#include <time.h>
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void sigchldaction (int signal){
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int status, pid;
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for (pid = waitpid(-1,&status,WNOHANG);pid > 0;pid = waitpid(-1,&status,WNOHANG)){
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// server: child terminated
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}
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}
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void sigpipeaction (int signal){
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//fprintf(stderr, "Sigpipe catturato\n");
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}
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typedef struct message {
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char data[100];
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}t_message;
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int main(int argc, char **argv) {
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int listenfd, connfd, n;
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struct sockaddr_in servaddr;
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//////////////////////////////////////////////////////////// SIGNALS
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///////SIGCHLD
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struct sigaction sigchldstructure;
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sigchldstructure.sa_handler = sigchldaction;
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sigchldstructure.sa_flags = 0;
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sigaction (SIGCHLD, &sigchldstructure, NULL);
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///////SIGPIPE
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struct sigaction sigpipestructure;
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sigpipestructure.sa_handler = sigpipeaction;
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sigpipestructure.sa_flags = 0;
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sigaction (SIGPIPE, &sigpipestructure, NULL);
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//////////////////////////////////////////////////////////// END SIGNALS
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if (argc != 2 ){
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printf("usage: daytimesrv <porta>\n");
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exit(0);
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}
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if( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
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printf("socket error\n");
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exit(0);
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}
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bzero(&servaddr, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_addr.s_addr = htonl(INADDR_ANY); /* wildcard address */
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servaddr.sin_port = htons(atoi(argv[1])); /* server port */
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if( (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr))) < 0){
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printf("bind error\n"); exit(0);
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}
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if( listen(listenfd, 5) < 0 )
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{ printf("listen error\n");
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exit(0);
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}
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fd_set fd_set_1;
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FD_ZERO(&fd_set_1);
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/*
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void FD_CLR(int fd, fd_set *set);
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int FD_ISSET(int fd, fd_set *set);
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void FD_SET(int fd, fd_set *set);
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void FD_ZERO(fd_set *set);
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*/
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struct timeval timer;
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timer.tv_sec = 99999999;
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timer.tv_usec = 0;
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for ( ; ; ) {
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if( (connfd = accept(listenfd, (struct sockaddr *) &client_address_struct, &client_address_struct_size)) < 0)
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{
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if(errno == EINTR || errno==ECONNABORTED)
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continue;
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printf("accept error\n");
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exit(1);
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}
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int split = fork();
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if ( split < 0) {
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printf("fork for iterative server failed\n");
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exit(-1);
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}
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if (split == 0){
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close(listenfd);
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t_message m;
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int ready_fds_to_read = 0;
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FD_set(connfd,&fd_set_1);
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for (ready_fds_to_read = select( connfd + 1, fd_set_1, NULL,NULL,&timer);
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ready_fds_to_read <= 0 ;
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ready_fds_to_read = select( connfd + 1, fd_set_1, NULL,NULL,&timer)){
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if (ready_fds_to_read == -1 && errno == EINTR ){ continue;}
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if (ready_fds_to_read == 0) {timer.tv_sec = 99999999;continue;}
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// write code to inform client that server has an internal error
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exit(0);
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}// wait for nonblocking fd in read set
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int ridden;
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if( FD_ISSET(connfd, fd_set_1) ){
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for (ridden = read (connfd,&m,sizeof(m)); ridden <= 0;ridden = read (connfd,&m,sizeof(m))){
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if (errno == EINTR){continue;} else {exit(0);}
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}
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fprint(stdout,%s,m.data);
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}
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exit(0);
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}else {
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close(connfd);
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}
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}
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}
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