--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pirollback/pathname.c	Sat Jul 06 22:06:38 2013 +0000
@@ -0,0 +1,53 @@
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include "types.h"
+#include "struct.h"
+#include "pathname.h"
+
+extern struct inode_info inode[];
+
+pathname_of_inode(ino, pnbuf)
+	char *pnbuf;
+{
+	int level, revpath[MAX_DIR_NEST];
+	struct inode_info *inf;
+	char *op;
+
+	for (level = 0; ino != 1; ino = inode[ino].parent) {
+		if (!inode[ino].parent)
+			return(-1);
+		if (level >= MAX_DIR_NEST)
+			return(-1);
+		revpath[level++] = ino;
+	}
+	op = pnbuf;
+	*op++ = '/';
+	while (level) {
+		level--;
+		inf = inode + revpath[level];
+		switch (inf->type) {
+		case 0xE1:
+		case 0xF1:
+			/* good only for the last component */
+			if (!level)
+				break;
+			else
+				return(-1);
+		case 0xF2:
+			/* good for all components */
+			break;
+		default:
+			/* bad */
+			return(-1);
+		}
+		strcpy(op, inf->dataptr);
+		op += strlen(inf->dataptr);
+		if (inf->type == 0xF2)
+			*op++ = '/';
+	}
+	*op = '\0';
+	return(0);
+}