Yuyi Wang via Cygwin wrote:
Below is a simple unix socket testing code. It creates a unix socket server and a client to connect to it immediately. It works on Linux and macOS, but hangs on cygwin. bind + listen work well, but seems that the connect method never returns.#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <sys/un.h> #include <errno.h> #define SOCKET_PATH "/tmp/example_socket" int main() { int server_fd, client_fd; struct sockaddr_un server_addr; socklen_t client_len; server_fd = socket(AF_UNIX, SOCK_STREAM, 0); if (server_fd == -1) { perror("server socket"); exit(EXIT_FAILURE); } memset(&server_addr, 0, sizeof(server_addr)); server_addr.sun_family = AF_UNIX; strncpy(server_addr.sun_path, SOCKET_PATH, sizeof(server_addr.sun_path) - 1); if (bind(server_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) { perror("bind"); exit(EXIT_FAILURE); } if (listen(server_fd, 1) == -1) { perror("listen"); exit(EXIT_FAILURE); } printf("Server is listening on %s\n", SOCKET_PATH); client_fd = socket(AF_UNIX, SOCK_STREAM, 0); if (client_fd == -1) { perror("client socket"); exit(EXIT_FAILURE); } if (connect(client_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) { perror("connect"); exit(EXIT_FAILURE); } printf("Client connected to server\n"); close(client_fd); close(server_fd); unlink(SOCKET_PATH); return 0; }
May be this issue which also affected postfix: https://sourceware.org/legacy-ml/cygwin/2014-08/msg00420.html Try: setsockopt(sd, SOL_SOCKET, SO_PEERCRED, NULL, 0); available since: https://cygwin.com/git/?p=newlib-cygwin.git;a=commit;h=697b9afe0 and may still work (I don't know). -- Regards, Christian -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
