hgfs: add wip debug command

1 files changed, 66 insertions, 0 deletions

diff --git a/sys/src/cmd/hgfs/hgdb.c b/sys/src/cmd/hgfs/hgdb.c
new file mode 100644
index 000000000..30a189627
--- /dev/null
+++ b/sys/src/cmd/hgfs/hgdb.c
@@ -0,0 +1,66 @@
+/* hg debug stuff, just dumps dirstate database right now */
+
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include "dat.h"
+#include "fns.h"
+
+char dothg[MAXPATH];
+
+void
+main(int argc, char *argv[])
+{
+	char buf[MAXPATH];
+	uchar hdr[1+4+4+4+4];
+	int n, fd;
+
+	ARGBEGIN {
+	} ARGEND;
+
+	if(getdothg(dothg, *argv) < 0)
+		sysfatal("can't find .hg: %r");
+
+	snprint(buf, sizeof(buf), "%s/dirstate", dothg);
+	if((fd = open(buf, OREAD)) < 0)
+		sysfatal("can't open dirstate: %r");
+
+	if(seek(fd, 0x28LL, 0) != 0x28LL)
+		sysfatal("can't seek dirstate: %r");
+
+	for(;;){
+		char state;
+		int mode, len;
+		vlong size;
+		long mtime;
+		
+		if((n = read(fd, hdr, sizeof(hdr))) == 0)
+			break;
+		if(n < 0)
+			sysfatal("read error: %r");
+		if(n < sizeof(hdr))
+			sysfatal("dirstate truncated");
+
+		state = hdr[0];
+		mode = hdr[4] | hdr[3]<<8 | hdr[2]<<16 | hdr[1]<<24;
+		size = hdr[8] | hdr[7]<<8 | hdr[6]<<16 | hdr[5]<<24;
+		mtime = hdr[12] | hdr[11]<<8 | hdr[10]<<16 | hdr[9]<<24;
+		len = hdr[16] | hdr[15]<<8 | hdr[14]<<16 | hdr[13]<<24;
+		USED(mtime);
+
+		if(len >= sizeof(buf))
+			sysfatal("invalid name length %d", len);
+
+		n = read(fd, buf, len);
+		if(n < 0)
+			sysfatal("read error: %r");
+		if(n < len)
+			sysfatal("dirstate name truncated");
+		buf[n] = 0;
+
+
+		print("%c\t%o\t%lld\t%s\n", state, mode, size, buf);
+	}
+
+	exits(0);
+}