From d1e063beb43e595680c65e3804d1f8ddff53373b Mon Sep 17 00:00:00 2001
From: Guido Guenther <agx@sigxcpu.org>
Date: Sat, 18 Nov 2006 23:48:07 +0100
Subject: Imported Debian version 0.3.8.8

---
 e2fslib/get_pathname.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 e2fslib/get_pathname.c

(limited to 'e2fslib/get_pathname.c')

diff --git a/e2fslib/get_pathname.c b/e2fslib/get_pathname.c
new file mode 100644
index 0000000..e218f2e
--- /dev/null
+++ b/e2fslib/get_pathname.c
@@ -0,0 +1,158 @@
+/*
+ * get_pathname.c --- do directry/inode -> name translation
+ * 
+ * Copyright (C) 1993, 1994, 1995 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ *
+ * 	ext2fs_get_pathname(fs, dir, ino, name)
+ *
+ * 	This function translates takes two inode numbers into a
+ * 	string, placing the result in <name>.  <dir> is the containing
+ * 	directory inode, and <ino> is the inode number itself.  If
+ * 	<ino> is zero, then ext2fs_get_pathname will return pathname
+ * 	of the the directory <dir>.
+ * 
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+struct get_pathname_struct {
+	ext2_ino_t	search_ino;
+	ext2_ino_t	parent;
+	char		*name;
+	errcode_t	errcode;
+};
+
+#ifdef __TURBOC__
+ #pragma argsused
+#endif
+static int get_pathname_proc(struct ext2_dir_entry *dirent,
+			     int	offset,
+			     int	blocksize,
+			     char	*buf,
+			     void	*priv_data)
+{
+	struct get_pathname_struct	*gp;
+	errcode_t			retval;
+
+	gp = (struct get_pathname_struct *) priv_data;
+
+	if (((dirent->name_len & 0xFF) == 2) &&
+	    !strncmp(dirent->name, "..", 2))
+		gp->parent = dirent->inode;
+	if (dirent->inode == gp->search_ino) {
+		retval = ext2fs_get_mem((dirent->name_len & 0xFF) + 1,
+					(void **) &gp->name);
+		if (retval) {
+			gp->errcode = retval;
+			return DIRENT_ABORT;
+		}
+		strncpy(gp->name, dirent->name, (dirent->name_len & 0xFF));
+		gp->name[dirent->name_len & 0xFF] = '\0';
+		return DIRENT_ABORT;
+	}
+	return 0;
+}
+
+static errcode_t ext2fs_get_pathname_int(ext2_filsys fs, ext2_ino_t dir, 
+					 ext2_ino_t ino, int maxdepth, 
+					 char *buf, char **name)
+{
+	struct get_pathname_struct gp;
+	char	*parent_name, *ret;
+	errcode_t	retval;
+
+	if (dir == ino) {
+		retval = ext2fs_get_mem(2, (void **)name);
+		if (retval)
+			return retval;
+		strcpy(*name, (dir == EXT2_ROOT_INO) ? "/" : ".");
+		return 0;
+	}
+
+	if (!dir || (maxdepth < 0)) {
+		retval = ext2fs_get_mem(4, (void **)name);
+		if (retval)
+			return retval;
+		strcpy(*name, "...");
+		return 0;
+	}
+
+	gp.search_ino = ino;
+	gp.parent = 0;
+	gp.name = 0;
+	gp.errcode = 0;
+	
+	retval = ext2fs_dir_iterate(fs, dir, 0, buf, get_pathname_proc, &gp);
+	if (retval)
+		goto cleanup;
+	if (gp.errcode) {
+		retval = gp.errcode;
+		goto cleanup;
+	}
+
+	retval = ext2fs_get_pathname_int(fs, gp.parent, dir, maxdepth-1,
+					 buf, &parent_name);
+	if (retval)
+		goto cleanup;
+	if (!ino) {
+		*name = parent_name;
+		return 0;
+	}
+	
+	if (gp.name) 
+		retval = ext2fs_get_mem(strlen(parent_name)+strlen(gp.name)+2,
+					(void **) &ret);
+	else
+		retval = ext2fs_get_mem(strlen(parent_name)+5,
+					(void **) &ret);
+	if (retval)
+		goto cleanup;
+	
+	ret[0] = 0;
+	if (parent_name[1])
+		strcat(ret, parent_name);
+	strcat(ret, "/");
+	if (gp.name)
+		strcat(ret, gp.name);
+	else
+		strcat(ret, "???");
+	*name = ret;
+	ext2fs_free_mem((void **) &parent_name);
+	retval = 0;
+	
+cleanup:
+	if (gp.name)
+		ext2fs_free_mem((void **) &gp.name);
+	return retval;
+}
+
+errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
+			      char **name)
+{
+	char	*buf;
+	errcode_t	retval;
+
+	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+	retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
+	if (retval)
+		return retval;
+	if (dir == ino)
+		ino = 0;
+	retval = ext2fs_get_pathname_int(fs, dir, ino, 32, buf, name);
+	ext2fs_free_mem((void **) &buf);
+	return retval;
+	
+}
-- 
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