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annotate src/main.c @ 2:052cf5cf100a

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handle server shutdown and print server time
author Dennis <dennisconcepcionmartin@gmail.com>
date Mon, 17 Jul 2023 19:11:53 +0100
parents 58952f1fb8da
children 691358f944e8
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052cf5cf100a handle server shutdown and print server time
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1 #include <signal.h>
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4 #include <string.h>
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5 #include <sys/types.h>
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6 #include <sys/socket.h>
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7 #include <netinet/in.h>
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8 #include <arpa/inet.h>
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9 #include <time.h>
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12 int socketfd;
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15 void sig_handler(int sig_num) {
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16 if (sig_num == 2) {
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17 printf("\nClosing socket\n");
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18 shutdown(socketfd, 2);
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19 exit(0);
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20 }
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21 }
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22
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23
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24 int main() {
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25 signal(SIGINT, sig_handler);
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26 socketfd = socket(AF_INET, SOCK_STREAM, 0);
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28 if (socketfd == -1) {
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29 perror("socket: ");
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30 exit(1);
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31 }
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32
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33 struct sockaddr_in sin;
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34 memset(&sin, 0, sizeof(sin));
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35 sin.sin_family = AF_INET;
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36 sin.sin_addr.s_addr = inet_addr("127.0.0.1");
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37 sin.sin_port = htons(5050);
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39 if (bind(socketfd, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
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40 perror("bind: ");
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41 exit(1);
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42 }
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43
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44 if (listen(socketfd, 10) == -1) {
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45 perror("listen: ");
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46 exit(1);
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47 }
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48
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49 printf("Waiting for connections...\n");
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50 char send_buffer[100];
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51
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52 while (1) {
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53 int connfd = accept(socketfd, (struct sockaddr*)NULL, NULL);
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54
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55 if (connfd == -1) {
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56 perror("accept: \n");
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57 exit(1);
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58 }
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59
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60 time_t now = time(NULL);
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61 snprintf(send_buffer, sizeof(send_buffer), "Server time: %s\n", ctime(&now));
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62 send(connfd, send_buffer, sizeof(send_buffer), 0);
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63 shutdown(connfd, 2);
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64 }
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65
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66 return 0;
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67 }