mirror of
https://github.com/9fans/plan9port.git
synced 2025-01-15 11:20:03 +00:00
102 lines
1.7 KiB
C
102 lines
1.7 KiB
C
#include "stdinc.h"
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#include "dat.h"
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#include "fns.h"
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char *host;
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void
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usage(void)
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{
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fprint(2, "usage: read [-h host] score [type]\n");
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threadexitsall("usage");
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}
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int
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parsescore(uchar *score, char *buf, int n)
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{
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int i, c;
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memset(score, 0, VtScoreSize);
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if(n != VtScoreSize*2){
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werrstr("score wrong length %d", n);
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return -1;
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}
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for(i=0; i<VtScoreSize*2; i++) {
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if(buf[i] >= '0' && buf[i] <= '9')
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c = buf[i] - '0';
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else if(buf[i] >= 'a' && buf[i] <= 'f')
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c = buf[i] - 'a' + 10;
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else if(buf[i] >= 'A' && buf[i] <= 'F')
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c = buf[i] - 'A' + 10;
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else {
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c = buf[i];
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werrstr("bad score char %d '%c'", c, c);
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return -1;
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}
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if((i & 1) == 0)
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c <<= 4;
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score[i>>1] |= c;
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}
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return 0;
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}
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void
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threadmain(int argc, char *argv[])
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{
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int type, n;
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uchar score[VtScoreSize];
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uchar *buf;
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VtConn *z;
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ARGBEGIN{
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case 'h':
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host = EARGF(usage());
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break;
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default:
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usage();
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break;
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}ARGEND
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if(argc != 1 && argc != 2)
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usage();
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fmtinstall('V', vtscorefmt);
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if(parsescore(score, argv[0], strlen(argv[0])) < 0)
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sysfatal("could not parse score '%s': %r", argv[0]);
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buf = vtmallocz(VtMaxLumpSize);
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z = vtdial(host);
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if(z == nil)
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sysfatal("could not connect to server: %r");
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if(vtconnect(z) < 0)
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sysfatal("vtconnect: %r");
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if(argc == 1){
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n = -1;
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for(type=0; type<VtMaxType; type++){
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n = vtread(z, score, type, buf, VtMaxLumpSize);
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if(n >= 0){
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fprint(2, "venti/read%s%s %V %d\n", host ? " -h" : "", host ? host : "",
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score, type);
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break;
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}
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}
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}else{
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type = atoi(argv[1]);
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n = vtread(z, score, type, buf, VtMaxLumpSize);
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}
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vthangup(z);
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if(n < 0)
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sysfatal("could not read block: %r");
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if(write(1, buf, n) != n)
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sysfatal("write: %r");
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threadexitsall(0);
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}
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