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我只是在学习如何在 C 中创建服务器，当我尝试从另一个终端远程登录到该服务器时，我不断收到“分段错误：11”错误。任何帮助将不胜感激！

#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

void error(char *msg)
{
    fprintf(stderr, "%s: %s\n", msg, strerror(errno));
    exit(1);
}

int main(int argc, char *argv[])
{
    char *advice[] = {
        "Take smaller bites\r\n",
        "Go for the tight jeans. No they do NOT make you look fat.\r\n",
        "One word: inappropriate\r\n",
        "Just for today, be honest. Tell your boss what you *really* think\r\n",
        "You might want to rethink that haircut\r\n"
    };
    int listener_d = socket(PF_INET, SOCK_STREAM, 0);

    struct sockaddr_in name;
    name.sin_family = PF_INET;
    name.sin_port = (in_port_t)htons(30000);
    name.sin_addr.s_addr = htonl(INADDR_ANY);
    if(bind(listener_d, (struct sockaddr *) &name, sizeof(name))== -1)
        error("Cannot bind");

    if (listen(listener_d, 10) == -1)
        error("Cannot listen");
    puts("Waiting connection");
    while(1)
    {
        struct sockaddr_storage client_addr;
        unsigned int address_size = sizeof(client_addr);
        int connect_d = accept(listener_d, (struct sockaddr *) &client_addr, &address_size);
        char msg = advice[0];

        if (send(connect_d, msg, strlen(msg), 0) == -1)
            error("Cannot send");
        close(connect_d);
    }    

    return 0;
}
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1 回答 1

3

您正在存储advice[0]到 achar而不是 achar *中。它不适合，并被截断，使指针无效。将其存储在char *（甚至const char *）中。

我还建议在编译器中打开警告，因为他们会发现这个错误。对于 GCC 和 Clang，我使用-Wall -Wextra -pedantic.

于 2013-05-22T03:06:37.790 回答