On Mon, Dec 31, 2001 at 07:53:28PM +0100, Ralf Habacker wrote: > > >- unix domain socket - The above mentioned os supports creating unix > > >domain sockets with previous existing files. On cygwin the unix domain > > >sockets couldn't be bound on existing files, so it has to be removed > > >first. > > > > Sounds like a bug. Submit a patch.
It's not a bug, it's Linux compliant behaviour. Try the following code on Linux and Cygwin: ================================== SNIP ============================== #include <stdio.h> #include <errno.h> #include <sys/socket.h> #include <sys/un.h> int main(int argc, char **argv) { int sockfd; socklen_t len; struct sockaddr_un addr1, addr2; if (argc != 2) { fprintf (stderr, "Idiot\n"); return 1; } sockfd = socket (AF_LOCAL, SOCK_STREAM, 0); if (sockfd < 0) { fprintf (stderr, "socket: %d, %s\n", errno, strerror (errno)); return 1; } memset (&addr1, 0, sizeof addr1); addr1.sun_family = AF_LOCAL; strncpy (addr1.sun_path, argv[1], sizeof addr1.sun_path - 1); if (bind (sockfd, (struct sockaddr *) &addr1, SUN_LEN (&addr1)) < 0) { fprintf (stderr, "bind: %d, %s\n", errno, strerror (errno)); return 1; } len = sizeof addr2; if (getsockname (sockfd, (struct sockaddr *) &addr2, &len) < 0) { fprintf (stderr, "getsockname: %d, %s\n", errno, strerror (errno)); return 1; } printf ("bound name = %s, returned len = %d\n", addr2.sun_path, len); return 0; } ================================== SNAP ============================== Linux: ------ $ gcc -o uds uds.c $ ./uds /tmp/foo.bar bound name = /tmp/foo.bar, returned len = 15 $ ./uds /tmp/foo.bar bind: 98, Address already in use Cygwin: ------- $ gcc -o uds uds.c $ ./uds /tmp/foo.bar bound name = <some random string here>, returned len = 16 $ ./uds /tmp/foo.bar bind: 112, Address already in use That shows that Cygwin's getsockname() doesn't return a correct sockname for unix domain sockets but the bind() call behaves correct. An application that depends on (actually undocumented) behaviour that a unix domain socket can be rebound is doing something wrong. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Developer mailto:[EMAIL PROTECTED] Red Hat, Inc. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/