这是一本书上的代码,自己看一下,OK,有什么问题,我的信箱,[email protected]
** server.c -- a stream socket server demo
*/#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>#define MYPORT 3490 /* the port users will be connecting to */#define BACKLOG 10 /* how many pending connections queue will hold */main()
{
int sockfd, new_fd; /* listen on sock_fd, new connection on new_fd */
struct sockaddr_in my_addr; /* my address information */
struct sockaddr_in their_addr; /* connector's address information */
int sin_size; if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
} my_addr.sin_family = AF_INET; /* host byte order */
my_addr.sin_port = htons(MYPORT); /* short, network byte order */
my_addr.sin_addr.s_addr = INADDR_ANY; /* automatically fill with my IP */
bzero(&(my_addr.sin_zero), 8); /* zero the rest of the struct */ if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1) {
perror("bind");
exit(1);
} if (listen(sockfd, BACKLOG) == -1) {
perror("listen");
exit(1);
} while(1) { /* main accept() loop */
sin_size = sizeof(struct sockaddr_in);
if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
perror("accept");
continue;
}
printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
if (!fork()) { /* this is the child process */
if (send(new_fd, "Hello, world!\n", 14, 0) == -1)
perror("send");
close(new_fd);
exit(0);
}
close(new_fd); /* parent doesn't need this */ while(waitpid(-1,NULL,WNOHANG) > 0); /* clean up all child processes */
}
}
** server.c -- a stream socket server demo
*/#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>#define MYPORT 3490 /* the port users will be connecting to */#define BACKLOG 10 /* how many pending connections queue will hold */main()
{
int sockfd, new_fd; /* listen on sock_fd, new connection on new_fd */
struct sockaddr_in my_addr; /* my address information */
struct sockaddr_in their_addr; /* connector's address information */
int sin_size; if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
} my_addr.sin_family = AF_INET; /* host byte order */
my_addr.sin_port = htons(MYPORT); /* short, network byte order */
my_addr.sin_addr.s_addr = INADDR_ANY; /* automatically fill with my IP */
bzero(&(my_addr.sin_zero), 8); /* zero the rest of the struct */ if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1) {
perror("bind");
exit(1);
} if (listen(sockfd, BACKLOG) == -1) {
perror("listen");
exit(1);
} while(1) { /* main accept() loop */
sin_size = sizeof(struct sockaddr_in);
if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
perror("accept");
continue;
}
printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
if (!fork()) { /* this is the child process */
if (send(new_fd, "Hello, world!\n", 14, 0) == -1)
perror("send");
close(new_fd);
exit(0);
}
close(new_fd); /* parent doesn't need this */ while(waitpid(-1,NULL,WNOHANG) > 0); /* clean up all child processes */
}
}
linux中帮助一个函数好帮助,可帮助一个结构就不好帮助。还有就是gdb怎么用?
我碰到的问题是输入如下命令
gdb server //要调试的程序名
(gdb) break 5 //第5行设断点
结果出现信息 No line5 in file "init.c"