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- #include <u.h>
- #include <libc.h>
- #include <ip.h>
- void
- usage(void)
- {
- fprint(2, "usage: %s [-x netmtpt]\n", argv0);
- exits("usage");
- }
- void
- main(int argc, char **argv)
- {
- int fd, cfd, n;
- char buf[4096], data[128], devdir[40], net[32];
- setnetmtpt(net, sizeof net, nil);
- ARGBEGIN{
- case 'x':
- setnetmtpt(net, sizeof net, EARGF(usage()));
- break;
- }ARGEND;
- sprint(data, "%s/udp!*!echo", net);
- cfd = announce(data, devdir);
- if(cfd < 0)
- sysfatal("can't announce %s: %r", data);
- if(fprint(cfd, "headers") < 0)
- sysfatal("can't set header mode: %r");
- sprint(data, "%s/data", devdir);
- fd = open(data, ORDWR);
- if(fd < 0)
- sysfatal("open %s: %r", data);
- while ((n = read(fd, buf, sizeof buf)) > 0)
- write(fd, buf, n);
- if (n < 0)
- sysfatal("error reading: %r");
- exits(0);
- }
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