高分求助Linux文件传输问题！！！
服务器:void recvMsg(){
int sockfd,new_fd,serverip;/**/
struct sockaddr_in server;/*server's address information*/
struct sockaddr_in client;/*client's address information*/
socklen_t sin_size;
int num;/*the binary count of recieved message*/
char recvmsg[MAXDATASIZE];/*buffer for recieve message*/
char sendmsg[MAXDATASIZE];/*buffer for send message*/
/*create a unbind socket*/
if((sockfd = socket(AF_INET,SOCK_STREAM,0))==-1){
perror("Creating socket failed");
exit(1);
}
bzero(&server,sizeof(server));/*set the server 0000*/
/**
*服务器端的信息
*/
server.sin_family = AF_INET;
server.sin_port = htons(atoi(port));
if(strlen(ip)>0){
inet_pton(AF_INET,ip,(void*)&serverip);
server.sin_addr.s_addr = serverip;
}
else
server.sin_addr.s_addr = htonl(INADDR_ANY);
/*将socket绑定到本机*/
if(bind(sockfd,(struct sockaddr *)&server,sizeof(struct sockaddr))==-1){
perror("Bind failed");
exit(1);
}
if(listen(sockfd,10)==-1){
perror("listen failed");
}
sin_size = sizeof(struct sockaddr_in);
while(1){
if((new_fd = accept(sockfd,(struct sockaddr*)&client,&sin_size))==-1){
perror("accept failed");
}
if(!fork()){
bzero(&recvmsg,sizeof(recvmsg));
if((num = recv(new_fd,recvmsg,sizeof(recvmsg),0))==-1){
perror("recv failed");
}
recvmsg[num] = '\0';
char **temp,*msg,*flag;
temp = split(recvmsg,"-");
flag = temp[0];
msg = temp[1];
/*对客户端过来的各种指令进行处理*/
if(strcmp(flag,"login")==0){
sprintf(sendmsg,"%d",checkLogin(msg));
}
if(strcmp(flag,"lmkdir")==0){
sprintf(sendmsg,"%d",mkdr(msg));
}
if(strcmp(flag,"lrmdir")==0){
sprintf(sendmsg,"%d",rmdr(msg));
}
if(strcmp(flag,"lpwd")==0){
curdr(sendmsg);
}
if(strcmp(flag,"lcd")==0){
chdr(msg,sendmsg);
}
if(strcmp(flag,"dir")==0){
lsdr(sendmsg);
}
if(strcmp(flag,"put")==0){
//get(new_fd,msg);
puts("zxzx");
char buffer[MAXDATASIZE];
FILE *fp = fopen("/home/chichao/ftp/txt.txt","w+");
if(NULL == fp ){
perror("can not write");
}
else{
bzero(buffer, MAXDATASIZE);
int file_block_length = 0;
while((file_block_length = recv(new_fd,buffer,sizeof(buffer),0))>0){
int write_length = fwrite(buffer,sizeof(char),file_block_length,fp);
bzero(buffer, MAXDATASIZE);
}
puts("endend");
if(file_block_length<0){
perror("recv data failed");
}
fclose(fp);
}
}
sendmsg[strlen(sendmsg)] = '\0';
if(send(new_fd,sendmsg,strlen(sendmsg),0)==-1){
perror("send");
}
close(new_fd);
}//
}
close(sockfd);/**/
}
客户端:
/*上传单个文件*/
void putf(){
char filename[FILE_NAME_MAX_SIZE];
char buffer[MAXDATASIZE];
int serverip;
int sockfd;/*socket*/
struct sockaddr_in server;/*server's address information*/
int num;/*the binary count of recieved message*/
/*create a unbind socket*/
if((sockfd = socket(AF_INET,SOCK_STREAM,0))==-1){
perror("Creating socket failed");
exit(1);
}
/**
*服务器端的信息
*/
server.sin_family = AF_INET;
server.sin_port = htons(atoi(port));
inet_pton(AF_INET,ip,(void*)&serverip);
server.sin_addr.s_addr = serverip;
bzero(buffer, MAXDATASIZE);
// 新建文件
printf("please input filename>");
gets(filename);
FILE *fp = fopen(filename, "r");
if (NULL == fp)
{
perror("can not read");
}
if(connect(sockfd,(struct sockaddr*)&server,sizeof(struct sockaddr))==-1){
perror("connect failed");
}
//发送文件名和标志位
sprintf(buffer,"%s-%s","put",filename);
if((num=send(sockfd,buffer,strlen(buffer),0))==-1){
perror("send flag failed");
exit(1);
}
bzero(buffer, MAXDATASIZE);
int file_block_length = 0;
while((file_block_length = fread(buffer, sizeof(char), MAXDATASIZE, fp)) > 0){
if((num = send(sockfd,buffer,MAXDATASIZE,0))>0){
perror("send message failed");
}
printf("%d",num);
buffer[num] = '\0';
printf("%s",buffer);
}
printf("file: %s upload finished", filename);
printf("\nmyftp>");
fclose(fp);
recv(sockfd,buffer,sizeof(buffer),0);
printf("%s",buffer);
close(sockfd);/**/
}
这是最核心的代码,一个很奇怪的问题是：文件名和标志为可以顺利发送，但是只有在客户端关闭退出的时候，才能将文件数据发送到服务器，这是什么问题？
