serverf.c

中科院徐志伟老师一书《操作系统 原理·技术与编程》的源代码和习题接

#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>      
#include <time.h>

int port = 8000;

void main() {
  struct sockaddr_in serveraddr;
  struct sockaddr_in clientaddr;
  int sockfd,temp_sockfd;
  int clientaddr_size;
  char buf[16384];
  time_t ticks;
  pid_t pid;

  sockfd = socket(AF_INET, SOCK_STREAM, 0);
  if (sockfd == -1) {
    perror("call to socket");
    exit(1);
  }
  bzero(&serveraddr, sizeof(serveraddr));
  serveraddr.sin_family = AF_INET;
  serveraddr.sin_addr.s_addr = INADDR_ANY;
  serveraddr.sin_port = htons(port);

  if (bind(sockfd, (struct sockaddr *)&serveraddr, sizeof(serveraddr)) == -1) {
    perror("call to bind");
    exit(1);
  }
  if (listen(sockfd, 20) == -1) {
    perror("call to listen");
    exit(1);
  }
  printf("Accepting connections ...\n"); 
  
  while(1) {
    temp_sockfd =accept(sockfd, (struct sockaddr *)&clientaddr,&clientaddr_size);
    if ((pid = fork())== 0) {/* child process the request */
      close(sockfd);    
      if (read(temp_sockfd, buf, 16384) == -1) {
      perror("call to read");
      exit(1);
      }
      printf("received from client:%s\n", buf);
      ticks = time(NULL);
      sprintf(buf,"%s\r\n",ctime(&ticks));

      if (write(temp_sockfd, buf,strlen(buf)) == -1) {
      perror("call to write");
      exit(1);
      }
     close(temp_sockfd);
     exit(0);
   }
   close(temp_sockfd);
 }
}