Dump-like file system backup for Unix, built on Venti.

src/cmd/vbackup/vmount.c

@@ -0,0 +1,77 @@
+#include <u.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <libc.h>
+#include "mountnfs.h"
+
+void
+usage(void)
+{
+	fprint(2, "usage: vmount [-v] [-h handle] address mountpoint\n");
+	exits("usage");
+}
+
+int handlelen = 20;
+uchar handle[64] = {
+	/* SHA1("/") */
+	0x42, 0x09, 0x9B, 0x4A, 0xF0, 0x21, 0xE5, 0x3F, 0xD8, 0xFD,
+	0x4E, 0x05, 0x6C, 0x25, 0x68, 0xD7, 0xC2, 0xE3, 0xFF, 0xA8,
+};
+
+void
+main(int argc, char **argv)
+{
+	char *p, *net, *unx;
+	u32int host;
+	int n, port, proto, verbose;
+	struct sockaddr_in sa;
+
+	verbose = 0;
+	ARGBEGIN{
+	case 'h':
+		p = EARGF(usage());
+		n = strlen(p);
+		if(n%2)
+			sysfatal("bad handle '%s'", p);
+		if(n > 2*sizeof handle)
+			sysfatal("handle too long '%s'", p);
+		handlelen = n/2;
+		if(dec16(handle, n/2, p, n) != n/2)
+			sysfatal("bad hex in handle '%s'", p);
+		break;
+
+	case 'v':
+		verbose = 1;
+		break;
+
+	default:
+		usage();
+	}ARGEND
+
+	if(argc != 2)
+		usage();
+
+	p = p9netmkaddr(argv[0], "udp", "nfs");
+	if(p9dialparse(strdup(p), &net, &unx, &host, &port) < 0)
+		sysfatal("bad address '%s'", p);
+
+	if(verbose)
+		print("nfs server is net=%s addr=%d.%d.%d.%d port=%d\n",
+			net, host&0xFF, (host>>8)&0xFF, (host>>16)&0xFF, host>>24, port);
+
+	proto = 0;
+	if(strcmp(net, "tcp") == 0)
+		proto = SOCK_STREAM;
+	else if(strcmp(net, "udp") == 0)
+		proto = SOCK_DGRAM;
+	else
+		sysfatal("bad proto %s: can only handle tcp and udp", net);
+
+	memset(&sa, 0, sizeof sa);
+	memmove(&sa.sin_addr, &host, 4);
+	sa.sin_family = AF_INET;
+	sa.sin_port = htons(port);
+
+	mountnfs(proto, &sa, handle, handlelen, argv[1]);
+	exits(0);
+}