From 7a4ee46d253e291044bba2d0c54b818b67ac013c Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Sun, 23 Nov 2003 17:54:58 +0000
Subject: Initial stab at Venti.

---
 src/cmd/venti/read.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 src/cmd/venti/read.c

(limited to 'src/cmd/venti/read.c')

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);
+}
-- 
cgit v1.2.3