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implement Dial;
include "sys.m";
sys: Sys;
include "draw.m";
include "arg.m";
include "keyring.m";
keyring: Keyring;
include "security.m";
auth: Auth;
include "sh.m";
sh: Sh;
Context: import sh;
Dial: module {
init: fn(nil: ref Draw->Context, argv: list of string);
};
badmodule(p: string)
{
sys->fprint(stderr(), "dial: cannot load %s: %r\n", p);
raise "fail:bad module";
}
DEFAULTALG := "none";
verbose := 0;
init(drawctxt: ref Draw->Context, argv: list of string)
{
sys = load Sys Sys->PATH;
keyring = load Keyring Keyring->PATH;
auth = load Auth Auth->PATH;
if (auth == nil)
badmodule(Auth->PATH);
arg := load Arg Arg->PATH;
if (arg == nil)
badmodule(Arg->PATH);
sh = load Sh Sh->PATH;
if (sh == nil)
badmodule(Sh->PATH);
auth->init();
alg: string;
keyfile: string;
doauth := 1;
arg->init(argv);
arg->setusage("dial [-A] [-k keyfile] [-a alg] addr command [arg...]");
while ((opt := arg->opt()) != 0) {
case opt {
'A' =>
doauth = 0;
'a' =>
alg = arg->earg();
'f' or
'k' =>
keyfile = arg->earg();
if (! (keyfile[0] == '/' || (len keyfile > 2 && keyfile[0:2] == "./")))
keyfile = "/usr/" + user() + "/keyring/" + keyfile;
'v' =>
verbose = 1;
* =>
arg->usage();
}
}
argv = arg->argv();
if (len argv < 2)
arg->usage();
arg = nil;
(addr, shcmd) := (hd argv, tl argv);
if (doauth && alg == nil)
alg = DEFAULTALG;
if (alg != nil && keyfile == nil) {
kd := "/usr/" + user() + "/keyring/";
if (exists(kd + addr))
keyfile = kd + addr;
else
keyfile = kd + "default";
}
cert: ref Keyring->Authinfo;
if (alg != nil) {
cert = keyring->readauthinfo(keyfile);
if (cert == nil) {
sys->fprint(stderr(), "dial: cannot read %s: %r\n", keyfile);
raise "fail:bad keyfile";
}
}
(ok, c) := sys->dial(addr, nil);
if (ok == -1) {
sys->fprint(stderr(), "dial: cannot dial %s:: %r\n", addr);
raise "fail:errors";
}
user: string;
if (alg != nil) {
err: string;
(c.dfd, err) = auth->client(alg, cert, c.dfd);
if (c.dfd == nil) {
sys->fprint(stderr(), "dial: authentication failed: %s\n", err);
raise "fail:errors";
}
user = err;
}
sys->dup(c.dfd.fd, 0);
sys->dup(c.dfd.fd, 1);
c.dfd = c.cfd = nil;
ctxt := Context.new(drawctxt);
if (user != nil)
ctxt.set("user", sh->stringlist2list(user :: nil));
else
ctxt.set("user", nil);
ctxt.set("net", ref Sh->Listnode(nil, c.dir) :: nil);
ctxt.run(sh->stringlist2list(shcmd), 1);
}
exists(f: string): int
{
(ok, nil) := sys->stat(f);
return ok != -1;
}
stderr(): ref Sys->FD
{
return sys->fildes(2);
}
user(): string
{
u := readfile("/dev/user");
if (u == nil)
return "nobody";
return u;
}
readfile(f: string): string
{
fd := sys->open(f, sys->OREAD);
if(fd == nil)
return nil;
buf := array[128] of byte;
n := sys->read(fd, buf, len buf);
if(n < 0)
return nil;
return string buf[0:n];
}
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