ref: ef6ce918c04fc82bea759fd843cc09e273ec9f6c
dir: /appl/cmd/cpu.b/
implement CPU; include "sys.m"; sys: Sys; stderr: ref Sys->FD; include "draw.m"; include "string.m"; str: String; include "arg.m"; include "keyring.m"; include "security.m"; include "dial.m"; DEFCMD: con "/dis/sh"; CPU: module { init: fn(ctxt: ref Draw->Context, argv: list of string); }; badmodule(p: string) { sys->fprint(stderr, "cpu: cannot load %s: %r\n", p); raise "fail:bad module"; } usage() { sys->fprint(stderr, "Usage: cpu [-C cryptoalg] mach command args...\n"); raise "fail:usage"; } # The default level of security is NOSSL, unless # the keyring directory doesn't exist, in which case # it's disallowed. init(nil: ref Draw->Context, argv: list of string) { sys = load Sys Sys->PATH; stderr = sys->fildes(2); arg := load Arg Arg->PATH; if (arg == nil) badmodule(Arg->PATH); str = load String String->PATH; if (str == nil) badmodule(String->PATH); au := load Auth Auth->PATH; if (au == nil) badmodule(Auth->PATH); kr := load Keyring Keyring->PATH; if (kr == nil) badmodule(Keyring->PATH); dial := load Dial Dial->PATH; arg->init(argv); alg := ""; while ((opt := arg->opt()) != 0) { if (opt == 'C') { alg = arg->arg(); } else usage(); } argv = arg->argv(); args := "auxi/cpuslave"; # if(ctxt != nil && ctxt.screen != nil) # args += " -s" + string ctxt.screen.id; # else args += " --"; mach: string; case len argv { 0 => usage(); 1 => mach = hd argv; args += " " + DEFCMD; * => mach = hd argv; args += " " + str->quoted(tl argv); } user := getuser(); kd := "/usr/" + user + "/keyring/"; cert := kd + dial->netmkaddr(mach, "tcp", ""); if (!exists(cert)) { cert = kd + "default"; if (!exists(cert)) { sys->fprint(stderr, "cpu: cannot find certificate in %s; use getauthinfo\n", kd); raise "fail:no certificate"; } } c := dial->dial(dial->netmkaddr(mach, "net", "rstyx"), nil); if(c == nil){ sys->fprint(stderr, "cpu: can't dial %s: %r\n", mach); raise "fail:dial"; } ai := kr->readauthinfo(cert); if (alg == nil) alg = "none"; err := au->init(); if(err != nil) { sys->fprint(stderr, "cpu: cannot initialise auth module: %s\n", err); raise "fail:auth init failed"; } fd := ref Sys->FD; #sys->fprint(stderr, "cpu: authenticating using alg '%s'\n", alg); (fd, err) = au->client(alg, ai, c.dfd); if(fd == nil) { sys->fprint(stderr, "cpu: authentication failed: %s\n", err); raise "fail:authentication failure"; } t := array of byte sys->sprint("%d\n%s\n", len (array of byte args)+1, args); if(sys->write(fd, t, len t) != len t){ sys->fprint(stderr, "cpu: export args write error: %r\n"); raise "fail:write error"; } if(sys->export(fd, "/", sys->EXPWAIT) < 0){ sys->fprint(stderr, "cpu: export failed: %r\n"); raise "fail:export error"; } } exists(file: string): int { (ok, nil) := sys->stat(file); return ok != -1; } getuser(): string { fd := sys->open("/dev/user", sys->OREAD); if(fd == nil){ sys->fprint(stderr, "cpu: cannot open /dev/user: %r\n"); raise "fail:no user id"; } buf := array[50] of byte; n := sys->read(fd, buf, len buf); if(n < 0){ sys->fprint(stderr, "cpu: cannot read /dev/user: %r\n"); raise "fail:no user id"; } return string buf[0:n]; }