void
main(int argc, char* argv[])
{
char* srv = nil;
char* sname = nil;
char* addr = nil;
int fd;
int p[2];
ARGBEGIN{
case 'D':
debug = 1;
break;
case 'n':
addr = EARGF(usage());
break;
case 'v':
verbose = 1;
break;
case 's':
sname = EARGF(usage());
break;
default:
altspc = ARGC();
}ARGEND;
if (addr == nil){
if (argc < 1)
usage();
srv = *argv;
argc--;
}
if (argc > 0)
usage();
if (sname == nil)
sname = (addr != nil) ? addr : "trfs";
fmtinstall('D', dirfmt);
fmtinstall('M', dirmodefmt);
fmtinstall('F', fcallfmt);
if (addr == nil)
fd = open(srv, ORDWR);
else
fd = dial(netmkaddr(addr, "net", "9fs"), 0, 0, 0);
if (fd < 0 || pipe(p) < 0)
sysfatal("can't connect to server %s: %r\n", (addr?addr:srv));
if (postfd(sname, p[0]) < 0)
sysfatal("can't post srv: %r\n");
rfork(RFNOTEG);
switch(rfork(RFPROC|RFNOTEG)){
case 0:
service(p[1], fd, 2);
break;
case -1:
sysfatal("can't fork server: %r\n");
break;
}
exits(nil);
}
void
_postmountsrv(Srv *s, char *name, char *mtpt, int flag)
{
int fd[2];
if(!s->nopipe){
if(pipe(fd) < 0)
sysfatal("pipe: %r");
s->infd = s->outfd = fd[1];
s->srvfd = fd[0];
}
if(name)
if(postfd(name, s->srvfd) < 0)
sysfatal("postfd %s: %r", name);
if(_forker == nil)
sysfatal("no forker");
_forker(postproc, s, RFNAMEG);
/*
* Normally the server is posting as the last thing it does
* before exiting, so the correct thing to do is drop into
* a different fd space and close the 9P server half of the
* pipe before trying to mount the kernel half. This way,
* if the file server dies, we don't have a ref to the 9P server
* half of the pipe. Then killing the other procs will drop
* all the refs on the 9P server half, and the mount will fail.
* Otherwise the mount hangs forever.
*
* Libthread in general and acme win in particular make
* it hard to make this fd bookkeeping work out properly,
* so leaveinfdopen is a flag that win sets to opt out of this
* safety net.
*/
if(!s->leavefdsopen){
rfork(RFFDG);
rendezvous(0, 0);
close(s->infd);
if(s->infd != s->outfd)
close(s->outfd);
}
if(mtpt){
if(amount(s->srvfd, mtpt, flag, "") == -1)
sysfatal("mount %s: %r", mtpt);
}else
close(s->srvfd);
}