我的FTP程序一直给出一个Broken Pipe错误，我已经找到了常见的原因，但仍然无法弄明白。尝试引入一些睡眠时间，但这导致了更多的问题。下面是我的客户端和服务器代码。任何帮助表示赞赏。最初每次运行都没有发生错误，但现在确实如此。谢谢。
ftserver.c
date("H",strtotime($time_of_start))ftclient.java
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>
void error(const char *msg) { perror(msg); exit(1); } // Error function used for reporting issues
void startControl(int portNo);
void setupData(char* hostname, int dataport, char* command, char* filename);
void sendDirectory();
void sendFile(char*filename);
int listenSocketFD, establishedConnectionFD, portNumber, charsRead, charsWritten, socketFD;
socklen_t sizeOfClientInfo;
char buffer[256];
struct sockaddr_in serverAddress, clientAddress, javaAddress;
struct hostent *serverHostInfo;
int main(int argc, char *argv[])
{
if (argc < 2) { fprintf(stderr,"USAGE: %s port\n", argv[0]); exit(1); }
// Set up the address struct for the server
memset((char *)&serverAddress, '\0', sizeof(serverAddress));
portNumber = atoi(argv[1]);
//signal(SIGPIPE,SIG_IGN);
startControl(portNumber);
while (1){
// Accept a connection, blocking if one is not available until one connects
sizeOfClientInfo = sizeof(clientAddress); // Get the size of the address for the client that will connect
establishedConnectionFD = accept(listenSocketFD, (struct sockaddr *)&clientAddress, &sizeOfClientInfo);
if (establishedConnectionFD < 0) error("ERROR on accept");
// Get the message from the client and display it
memset(buffer, '\0', 256);
printf("connection set up and ready to receive\n");
charsRead = recv(establishedConnectionFD, buffer, 255, 0); // Read the client's message from the socket
if (charsRead < 0) error("ERROR reading from socket");
printf("SERVER: I received this from the client: \"%s\"\n", buffer);
char *token; int dataport; char* filename; char* hostname;
token = strtok(buffer, "#");
if (strcmp(token, "-l") == 0){
charsWritten = send(establishedConnectionFD, "list command", 13, 0);
if (charsRead < 0) error("ERROR writing to socket");
hostname = strtok(NULL, "#");
printf("hostname %s\n", hostname);
dataport = atoi(strtok(NULL, "#"));
printf("datanum %d\n", dataport);
// close(establishedConnectionFD);
filename = "";
setupData(hostname, dataport, token, filename);
}
else {
// send invalid
charsWritten = send(establishedConnectionFD, "invalid command", 16, 0);
if (charsRead < 0) error("ERROR writing to socket");
// close(establishedConnectionFD);
}
close(establishedConnectionFD); // Close the existing socket which is connected to the client
}
close(listenSocketFD); // Close the listening socket
return 0;
}
void startControl(int portNo){
// Set up the socket
listenSocketFD = socket(AF_INET, SOCK_STREAM, 0); // Create the socket
if (listenSocketFD < 0) error("ERROR opening socket");
serverAddress.sin_family = AF_INET;
serverAddress.sin_port = htons(portNo);
serverAddress.sin_addr.s_addr = INADDR_ANY;
// Enable the socket to begin listening
if (bind(listenSocketFD, (struct sockaddr *)&serverAddress, sizeof(serverAddress)) < 0) // Connect socket to port
error("ERROR on binding");
listen(listenSocketFD, 5); // Flip the socket on - it can now receive up to 5 connections
printf("returning from startcontol right now\n");
}
void setupData(char* hostname, int dataport, char* command, char* filename){
// Set up the server address struct
memset((char*)&serverAddress, '\0', sizeof(serverAddress)); // Clear out the address struct
portNumber = dataport; // Get the port number, convert to an integer from a string
javaAddress.sin_family = AF_INET; // Create a network-capable socket
javaAddress.sin_port = htons(portNumber); // Store the port number
serverHostInfo = gethostbyname(hostname); // Convert the machine name into a special form of address
if (serverHostInfo == NULL) { fprintf(stderr, "CLIENT: ERROR, no such host\n"); exit(0); }
memcpy((char*)&javaAddress.sin_addr.s_addr, (char*)serverHostInfo->h_addr, serverHostInfo->h_length);
// Set up the socket
socketFD = socket(AF_INET, SOCK_STREAM, 0); // Create the socket
if (socketFD < 0) error("CLIENT: ERROR opening socket");
int connectionAttempts = 0; int status = 0;
do {
connectionAttempts++;
status = connect(socketFD, (struct sockaddr *) &javaAddress, sizeof(javaAddress));
} while (status == -1 && connectionAttempts < 10);
//sleep(100);
if (strcmp(command, "-l") == 0){
sendDirectory();
printf("sendDir success\n");
}
close(socketFD); // Close the socket
}
void sendDirectory(){
printf("in send directory\n");
char fileList[1000];
memset(fileList, '\0', sizeof(fileList));
DIR *dir = opendir(".");
if (dir == NULL){
perror("could not open directory");
exit(1);
}
struct dirent *ent; struct stat info;
int numFiles = 0;
while((ent = readdir(dir)) != NULL) {
//printf("in send directory while\n");
//printf("filename%s\n", ent->d_name);
stat(ent->d_name, &info);
//skip over directories
if (S_ISDIR(info.st_mode)){
continue;
}
else if ((strcmp(ent->d_name, ".") == 0) && (strcmp(ent->d_name, "..") == 0)){
continue;
}
else {
printf("filename%s\n", ent->d_name);
//keep adding the filenames to the filelist
strcat(fileList, ent->d_name);
strcat(fileList, ",");
numFiles++;
}
}
printf("fileList %s\n", fileList);
printf("length %d\n", strlen(fileList));
charsWritten = send(socketFD, fileList, strlen(fileList), 0);
printf("charsWritten success\n");
//closedir(dir);
}
答案 0 :(得分：0)
int offset = 0;
while (!feof(fp)){
readBytes = fread(fileBuffer, 1, sizeof(fileBuffer), fp);
似乎将偏移重置为零想要里面“while”循环......？
我认为您的意思是您的服务器正在接收SIGPIPE。客户当时是否还活着？