Guys, it appears that I'm missing something fundamental in how 9pfuse (the one written by Russ) works when it is given "-" as an address. The source looks like it should be simply using stdin for R/W instead of dialing out the connection first, but it doesn't really seem to work. Here's the simplest way of reproducing what I'm seeing:
$ cat connector.c #include <stdlib.h> #include <sys/types.h> #include <sys/socket.h> #include <error.h> #include <errno.h> void socket012(int fd) { int i; for (i=0; i<3; i++) { close(i); dup2(fd, i); } close(fd); } int main() { int fd[2]; if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNIX, fd) < 0) error(-1, errno, "socketpair failed"); if (fork()) { socket012(fd[0]); execlp("9pfuse", "9pfuse", "-", "/tmp/fuse", (char*)0); } else { socket012(fd[1]); execlp("ramfs", "ramfs", "-i", (char*)0); } } $ cc connector.c $ ./a.out Now, in a different terminal I do this: # ls /tmp/fuse ls: cannot access /tmp/fuse: Permission denied Also apparently the processes are there (although a zombie ramfs looks suspicious -- the second ramfs is fully functional): $ ps -alef | egrep "9p|ramfs" 0 S roman 22661 18264 0 78 0 - 2575 wait 12:13 pts/4 00:00:00 9pfuse -D - /tmp/fuse 1 S roman 22663 22661 0 78 0 - 12906 stext 12:13 ? 00:00:00 9pfuse -D - /tmp/fuse 1 S roman 22666 1 0 79 0 - 2725 - 12:13 pts/4 00:00:00 ramfs -i 0 Z roman 22662 22661 0 78 0 - 0 exit 12:13 pts/4 00:00:00 [ramfs] <defunct> Now, if I enable -D in 9pfuse (by dup2'ing only 0 instead of 0,1 and 2) here's the output I get: <- Tversion tag 0 msize 8192 version '9P2000.u' -> Rversion tag 65535 msize 8192 version '9P2000' <- Tattach tag 0 fid 0 afid -1 uname roman aname -> Rattach tag 0 qid (0000000000000000 0 d) FUSE -> len 16 unique 0x1 uid 0 gid 0 pid 0 Init major 7 minor 8 FUSE <- unique 0x1 (Init) major 7 minor 5 max_write 4096 And it stops there no matter what I do from then on. Well, I'm baffled. Any help would be tremendously appreciated. Thanks, Roman.