Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>

void
hogport(char *proto, int port)
{
        char buf[256];
        char dir[40];

        snprint(buf, sizeof(buf), "%s!%d", proto, port);
        if(announce(buf, dir) < 0)
                fprint(2, "%s: can't hog %s\n", argv0, buf);
}

void
hogrange(char *str)
{
        char *er, *sr;
        int start, end;

        sr = strrchr(str, '!');
        if(sr == nil)
                sysfatal("bad range: %s", str);
        *sr++ = 0;

        er = strchr(sr, '-');
        if(er == nil)
                er = sr;
        else
                er++;

        start = atoi(sr);
        end = atoi(er);
        if(end < start)
                sysfatal("bad range: %s", sr);

        for(; start <= end; start++)
                hogport(str, start);
}

void
main(int argc, char **argv)
{
        int i;

        ARGBEGIN{
        }ARGEND;

        if(argc == 0){
                fprint(2, "usage: %s portrange\n", argv0);
                exits("usage");
        }

        switch(rfork(RFREND|RFNOTEG|RFFDG|RFPROC|RFNAMEG)){
        case 0:
                close(0);
                close(1);
                break;
        case -1:
                abort(); /* "fork failed\n" */;
        default:
                _exits(0);
        }

        for(i = 0; i < argc; i++)
                hogrange(argv[i]);

        close(2);
        for(;;)
                sleep(10000);
}