如何创建类型套接字的特殊文件？ [英] How to create special files of type socket?

问题描述

我需要为kgdb-gdb远程连接创建串口套接字。

就像 mkfifo 创建一个在你的系统上的FIFO，我们如何创建套接字文件？

解决方案

在@cidermonkey接受的答案中的链接是伟大的，如果你试图编写一个使用套接字的应用程序。如果你真的想创建一个，你可以在python中完成：

 〜]＃python -cimport socket as s ; sock = s.socket（s.AF_UNIX）; sock.bind（'/ tmp / somesocket'）
〜]＃ll / tmp / somesocket 
 srwxr-xr-x。 1 root root 0 Mar 3 19:30 / tmp / somesocket 
  

或用一个小小的C程序，例如，将以下内容保存到 create-a-socket.c ：

  #include< fcntl.h> 
 #include< sys / un.h> 
 #include< sys / socket.h> 
 #include< sys / stat.h> 
 #include< sys / types.h> 
 #include< unistd.h> 
 
 int main（int argc，char ** argv）
 {
 //下面这行代表套接字路径为第一个参数
 char * mysocketpath = argv [1]; 
 //或者，你可以评论并静态设置：
 // char * mysocketpath =/ tmp / mysock; 
 struct sockaddr_un namesock; 
 int fd; 
 namesock.sun_family = AF_UNIX; 
 strncpy（namesock.sun_path，（char *）mysocketpath，sizeof（namesock.sun_path））; 
 fd = socket（AF_UNIX，SOCK_DGRAM，0）; 
 bind（fd，（struct sockaddr *）& namesock，sizeof（struct sockaddr_un））; 
 close（fd）; 
返回0; 
} 
  

然后安装gcc，编译它和ta-da：

 〜]＃gcc -o create-a-socket create-a-socket.c 
〜]＃./create-a -socket mysock 
〜]＃ll mysock 
 srwxr-xr-x。 1 root root 0 Mar 3 17:45 mysock 
  

I need to create serial port socket for kgdb-gdb remote connection.

Just as mkfifo creates a FIFO on your system, how can we create socket files?

解决方案

The link in the accepted answer by @cidermonkey is great if you're trying to write an app that uses sockets. If you literally just want to create one you can do it in python:

~]# python -c "import socket as s; sock = s.socket(s.AF_UNIX); sock.bind('/tmp/somesocket')"
~]# ll /tmp/somesocket 
srwxr-xr-x. 1 root root 0 Mar  3 19:30 /tmp/somesocket

Or with a tiny C program, e.g., save the following to create-a-socket.c:

#include <fcntl.h>
#include <sys/un.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

int main(int argc, char **argv)
{
    // The following line expects the socket path to be first argument
    char * mysocketpath = argv[1];
    // Alternatively, you could comment that and set it statically:
    //char * mysocketpath = "/tmp/mysock";
    struct sockaddr_un namesock;
    int fd;
    namesock.sun_family = AF_UNIX;
    strncpy(namesock.sun_path, (char *)mysocketpath, sizeof(namesock.sun_path));
    fd = socket(AF_UNIX, SOCK_DGRAM, 0);
    bind(fd, (struct sockaddr *) &namesock, sizeof(struct sockaddr_un));
    close(fd);
    return 0;
}

Then install gcc, compile it, and ta-da:

~]# gcc -o create-a-socket create-a-socket.c
~]# ./create-a-socket mysock
~]# ll mysock
srwxr-xr-x. 1 root root 0 Mar  3 17:45 mysock

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