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#include <u.h>
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#include <libc.h>
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void
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hogport(char *proto, int port)
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{
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	char buf[256];
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	char dir[40];
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	snprint(buf, sizeof(buf), "%s!%d", proto, port);
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	if(announce(buf, dir) < 0)
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		fprint(2, "%s: can't hog %s\n", argv0, buf);
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}
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void
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hogrange(char *str)
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{
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	char *er, *sr;
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	int start, end;
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	sr = strrchr(str, '!');
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	if(sr == nil)
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		sysfatal("bad range: %s", str);
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	*sr++ = 0;
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	er = strchr(sr, '-');
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	if(er == nil)
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		er = sr;
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	else
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		er++;
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	start = atoi(sr);
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	end = atoi(er);
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	if(end < start)
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		sysfatal("bad range: %s", sr);
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	for(; start <= end; start++)
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		hogport(str, start);
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}
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void
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main(int argc, char **argv)
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{
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	int i;
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	ARGBEGIN{
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	}ARGEND;
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	if(argc == 0){
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		fprint(2, "usage: %s portrange\n", argv0);
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		exits("usage");
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	}
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	switch(rfork(RFREND|RFNOTEG|RFFDG|RFPROC|RFNAMEG)){
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	case 0:
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		close(0);
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		close(1);
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		break;
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	case -1:
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		abort(); /* "fork failed\n" */;
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	default:
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		_exits(0);
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	}
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	for(i = 0; i < argc; i++)
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		hogrange(argv[i]);
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	close(2);
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	for(;;)
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		sleep(10000);
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}