GopherProxy

	listen1.c - 9base - revived minimalist port of Plan 9 userland to Unix
	git clone git://git.suckless.org/9base
	Log
	Files
	Refs
	README
	LICENSE
	---
	listen1.c (1652B)
	---
	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/dat…
	85 _exits(0);
	86 }
	87 print("incoming call for %s from %s in %s\n", ar…
	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 }