tread.c - plan9port - [fork] Plan 9 from user space
HTML git clone git://src.adamsgaard.dk/plan9port
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
tread.c (1349B)
---
1 #include <u.h>
2 #include <libc.h>
3 #include <venti.h>
4 #include <libsec.h>
5 #include <thread.h>
6
7 enum
8 {
9 // XXX What to do here?
10 VtMaxLumpSize = 65535,
11 };
12
13 void
14 usage(void)
15 {
16 fprint(2, "usage: read [-h host] [-t type] score\n");
17 threadexitsall("usage");
18 }
19
20 void
21 threadmain(int argc, char *argv[])
22 {
23 int type, n;
24 uchar score[VtScoreSize];
25 uchar *buf;
26 VtConn *z;
27 char *host;
28
29 fmtinstall('F', vtfcallfmt);
30 fmtinstall('V', vtscorefmt);
31
32 host = nil;
33 type = -1;
34 ARGBEGIN{
35 case 'h':
36 host = EARGF(usage());
37 break;
38 case 't':
39 type = atoi(EARGF(usage()));
40 break;
41 default:
42 usage();
43 break;
44 }ARGEND
45
46 if(argc != 1)
47 usage();
48
49 if(vtparsescore(argv[0], nil, score) < 0)
50 sysfatal("could not parse score '%s': %r", argv[0]);
51
52 buf = vtmallocz(VtMaxLumpSize);
53
54 z = vtdial(host);
55 if(z == nil)
56 sysfatal("could not connect to server: %r");
57
58 if(vtconnect(z) < 0)
59 sysfatal("vtconnect: %r");
60
61 if(type == -1){
62 n = -1;
63 for(type=0; type<VtMaxType; type++){
64 n = vtread(z, score, type, buf, VtMaxLumpSize);
65 if(n >= 0){
66 fprint(2, "venti/read%s%s %V %d\n", host ? " -h" : "", host ? host : "",
67 score, type);
68 break;
69 }
70 }
71 }else
72 n = vtread(z, score, type, buf, VtMaxLumpSize);
73
74 vthangup(z);
75 if(n < 0)
76 sysfatal("could not read block: %r");
77 if(write(1, buf, n) != n)
78 sysfatal("write: %r");
79 threadexitsall(0);
80 }