81 lines
1.4 KiB
C
81 lines
1.4 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.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(sys_rfork(RFREND|RFNOTEG|RFFDG|RFPROC|RFNAMEG)){
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case 0:
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sys_close(0);
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sys_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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sys__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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sys_close(2);
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for(;;)
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sleep(10000);
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}
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