1 files changed, 157 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/get_pathname.c b/e2fsprogs/ext2fs/get_pathname.c
new file mode 100644
index 000000000..23f593f67
--- /dev/null
+++ b/e2fsprogs/ext2fs/get_pathname.c
@@ -0,0 +1,157 @@
+/*
+ * 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 EXT2FS_ATTR((unused)),
+                             int        blocksize EXT2FS_ATTR((unused)),
+                             char       *buf EXT2FS_ATTR((unused)),
+                             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,
+                                        &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, name);
+                if (retval)
+                        return retval;
+                strcpy(*name, (dir == EXT2_ROOT_INO) ? "/" : ".");
+                return 0;
+        }
+
+        if (!dir || (maxdepth < 0)) {
+                retval = ext2fs_get_mem(4, 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,
+                                        &ret);
+        else
+                retval = ext2fs_get_mem(strlen(parent_name)+5, &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(&parent_name);
+        retval = 0;
+        
+cleanup:
+        if (gp.name)
+                ext2fs_free_mem(&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, &buf);
+        if (retval)
+                return retval;
+        if (dir == ino)
+                ino = 0;
+        retval = ext2fs_get_pathname_int(fs, dir, ino, 32, buf, name);
+        ext2fs_free_mem(&buf);
+        return retval;
+        
+}