1 #include <u.h>
2 #include <libc.h>
3 #include <auth.h>
4 
5 int verbose;
6 int trusted;
7 
8 void
9 usage(void)
10 {
11 	fprint(2, "usage: listen1 [-v] address cmd args...\n");
12 	exits("usage");
13 }
14 
15 char*
16 remoteaddr(char *dir)
17 {
18 	static char buf[128];
19 	char *p;
20 	int n, fd;
21 
22 	snprint(buf, sizeof buf, "%s/remote", dir);
23 	fd = open(buf, OREAD);
24 	if(fd < 0)
25 		return "";
26 	n = read(fd, buf, sizeof(buf));
27 	close(fd);
28 	if(n > 0){
29 		buf[n] = 0;
30 		p = strchr(buf, '!');
31 		if(p)
32 			*p = 0;
33 		return buf;
34 	}
35 	return "";
36 }
37 
38 void
39 main(int argc, char **argv)
40 {
41 	char dir[40], ndir[40];
42 	int ctl, nctl, fd;
43 
44 	ARGBEGIN{
45 	default:
46 		usage();
47 	case 't':
48 		trusted = 1;
49 		break;
50 	case 'v':
51 		verbose = 1;
52 		break;
53 	}ARGEND
54 
55 	if(argc < 2)
56 		usage();
57 
58 	if(!verbose){
59 		close(1);
60 		fd = open("/dev/null", OWRITE);
61 		if(fd != 1){
62 			dup(fd, 1);
63 			close(fd);
64 		}
65 	}
66 
67 	print("listen started\n");
68 	ctl = announce(argv[0], dir);
69 	if(ctl < 0)
70 		sysfatal("announce %s: %r", argv[0]);
71 
72 	for(;;){
73 		nctl = listen(dir, ndir);
74 		if(nctl < 0)
75 			sysfatal("listen %s: %r", argv[0]);
76 
77 		switch(rfork(RFFDG|RFPROC|RFNOWAIT|RFNOTEG)){
78 		case -1:
79 			close(nctl);
80 			continue;
81 		case 0:
82 			fd = accept(nctl, ndir);
83 			if(fd < 0){
84 				fprint(2, "accept %s: can't open  %s/data: %r", argv[0], ndir);
85 				_exits(0);
86 			}
87 			print("incoming call for %s from %s in %s\n", argv[0], remoteaddr(ndir), ndir);
88 			close(ctl);
89 			close(nctl);
90 			/*putenv("net", ndir); */
91 			/*sprint(data, "%s/data", ndir); */
92 			/*bind(data, "/dev/cons", MREPL); */
93 			dup(fd, 0);
94 			dup(fd, 1);
95 			dup(fd, 2);
96 			close(fd);
97 			exec(argv[1], argv+1);
98 			fprint(2, "exec: %r");
99 			exits(nil);
100 		default:
101 			close(nctl);
102 			break;
103 		}
104 	}
105 }