unix – 如何创建socket类型的特殊文件?

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我需要为kgdb-gdb远程连接创建串口套接字。

正如mkfifo在您的系统上创建FIFO一样,我们如何创建套接文件

@cidermonkey接受的答案中的链接非常好,如果您正在尝试编写使用套接字的应用程序。如果你真的只想创建一个,你可以在python中做到:
  1. ~]# python -c "import socket as s; sock = s.socket(s.AF_UNIX); sock.bind('/tmp/somesocket')"
  2. ~]# ll /tmp/somesocket
  3. srwxr-xr-x. 1 root root 0 Mar 3 19:30 /tmp/somesocket

或者with a tiny C program,例如,将以下内容保存到create-a-socket.c:

  1. #include <fcntl.h>
  2. #include <sys/un.h>
  3. #include <sys/socket.h>
  4. #include <sys/stat.h>
  5. #include <sys/types.h>
  6. #include <unistd.h>
  7.  
  8. int main(int argc,char **argv)
  9. {
  10. // The following line expects the socket path to be first argument
  11. char * mysocketpath = argv[1];
  12. // Alternatively,you could comment that and set it statically:
  13. //char * mysocketpath = "/tmp/mysock";
  14. struct sockaddr_un namesock;
  15. int fd;
  16. namesock.sun_family = AF_UNIX;
  17. strncpy(namesock.sun_path,(char *)mysocketpath,sizeof(namesock.sun_path));
  18. fd = socket(AF_UNIX,SOCK_DGRAM,0);
  19. bind(fd,(struct sockaddr *) &namesock,sizeof(struct sockaddr_un));
  20. close(fd);
  21. return 0;
  22. }

然后安装gcc,编译它,然后ta-da:

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

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