tdevnull.c - plan9port - [fork] Plan 9 from user space
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tdevnull.c (1223B)
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1 /* Copyright (c) 2004 Russ Cox */
2 #include <u.h>
3 #include <libc.h>
4 #include <venti.h>
5 #include <thread.h>
6 #include <libsec.h>
7
8 #ifndef _UNISTD_H_
9 #pragma varargck type "F" VtFcall*
10 #pragma varargck type "T" void
11 #endif
12
13 int verbose;
14
15 enum
16 {
17 STACK = 8192
18 };
19
20 void
21 usage(void)
22 {
23 fprint(2, "usage: venti/devnull [-v] [-a address]\n");
24 threadexitsall("usage");
25 }
26
27 void
28 threadmain(int argc, char **argv)
29 {
30 VtReq *r;
31 VtSrv *srv;
32 char *address;
33
34 fmtinstall('V', vtscorefmt);
35 fmtinstall('F', vtfcallfmt);
36
37 address = "tcp!*!venti";
38
39 ARGBEGIN{
40 case 'v':
41 verbose++;
42 break;
43 case 'a':
44 address = EARGF(usage());
45 break;
46 default:
47 usage();
48 }ARGEND
49
50 srv = vtlisten(address);
51 if(srv == nil)
52 sysfatal("vtlisten %s: %r", address);
53
54 while((r = vtgetreq(srv)) != nil){
55 r->rx.msgtype = r->tx.msgtype+1;
56 if(verbose)
57 fprint(2, "<- %F\n", &r->tx);
58 switch(r->tx.msgtype){
59 case VtTping:
60 break;
61 case VtTgoodbye:
62 break;
63 case VtTread:
64 r->rx.error = vtstrdup("no such block");
65 r->rx.msgtype = VtRerror;
66 break;
67 case VtTwrite:
68 packetsha1(r->tx.data, r->rx.score);
69 break;
70 case VtTsync:
71 break;
72 }
73 if(verbose)
74 fprint(2, "-> %F\n", &r->rx);
75 vtrespond(r);
76 }
77 threadexitsall(nil);
78 }