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author | rsc <devnull@localhost> | 2003-11-23 17:54:58 +0000 |
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committer | rsc <devnull@localhost> | 2003-11-23 17:54:58 +0000 |
commit | 7a4ee46d253e291044bba2d0c54b818b67ac013c (patch) | |
tree | 7bdcaf69a15ecd24c057a697936b67bbde93e00b /src/cmd/venti/read.c | |
parent | 4fbfdd7acd4bf4fc71b1329230e05fc761907566 (diff) | |
download | plan9port-7a4ee46d253e291044bba2d0c54b818b67ac013c.tar.gz plan9port-7a4ee46d253e291044bba2d0c54b818b67ac013c.tar.bz2 plan9port-7a4ee46d253e291044bba2d0c54b818b67ac013c.zip |
Initial stab at Venti.
Diffstat (limited to 'src/cmd/venti/read.c')
-rw-r--r-- | src/cmd/venti/read.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/cmd/venti/read.c b/src/cmd/venti/read.c new file mode 100644 index 00000000..969a0593 --- /dev/null +++ b/src/cmd/venti/read.c @@ -0,0 +1,102 @@ +#include "stdinc.h" +#include "dat.h" +#include "fns.h" + +char *host; + +void +usage(void) +{ + fprint(2, "usage: read [-h host] score [type]\n"); + threadexitsall("usage"); +} + +int +parsescore(uchar *score, char *buf, int n) +{ + int i, c; + + memset(score, 0, VtScoreSize); + + if(n != VtScoreSize*2){ + werrstr("score wrong length %d", n); + return -1; + } + for(i=0; i<VtScoreSize*2; i++) { + if(buf[i] >= '0' && buf[i] <= '9') + c = buf[i] - '0'; + else if(buf[i] >= 'a' && buf[i] <= 'f') + c = buf[i] - 'a' + 10; + else if(buf[i] >= 'A' && buf[i] <= 'F') + c = buf[i] - 'A' + 10; + else { + c = buf[i]; + werrstr("bad score char %d '%c'", c, c); + return -1; + } + + if((i & 1) == 0) + c <<= 4; + + score[i>>1] |= c; + } + return 0; +} + +void +threadmain(int argc, char *argv[]) +{ + int type, n; + uchar score[VtScoreSize]; + uchar *buf; + VtConn *z; + + ARGBEGIN{ + case 'h': + host = EARGF(usage()); + break; + default: + usage(); + break; + }ARGEND + + if(argc != 1 && argc != 2) + usage(); + + + fmtinstall('V', vtscorefmt); + + if(parsescore(score, argv[0], strlen(argv[0])) < 0) + sysfatal("could not parse score '%s': %r", argv[0]); + + buf = vtmallocz(VtMaxLumpSize); + + z = vtdial(host); + if(z == nil) + sysfatal("could not connect to server: %r"); + + if(vtconnect(z) < 0) + sysfatal("vtconnect: %r"); + + if(argc == 1){ + n = -1; + for(type=0; type<VtMaxType; type++){ + n = vtread(z, score, type, buf, VtMaxLumpSize); + if(n >= 0){ + fprint(2, "venti/read%s%s %V %d\n", host ? " -h" : "", host ? host : "", + score, type); + break; + } + } + }else{ + type = atoi(argv[1]); + n = vtread(z, score, type, buf, VtMaxLumpSize); + } + vthangup(z); + if(n < 0) + sysfatal("could not read block: %r"); + if(write(1, buf, n) != n) + sysfatal("write: %r"); + + threadexitsall(0); +} |