lib/ext2fs/dblist_dir.c

   1 /*
   2  * dblist_dir.c --- iterate by directory entry
   3  *
   4  * Copyright 1997 by Theodore Ts'o
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Library
   8  * General Public License, version 2.
   9  * %End-Header%
  10  */
  11
  12 #include "config.h"
  13 #include <stdio.h>
  14 #if HAVE_UNISTD_H
  15 #include <unistd.h>
  16 #endif
  17 #include <string.h>
  18 #include <time.h>
  19
  20 #include "ext2_fs.h"
  21 #include "ext2fsP.h"
  22
  23 static int db_dir_proc(ext2_filsys fs, struct ext2_db_entry2 *db_info,
  24                        void *priv_data);
  25
  26 errcode_t ext2fs_dblist_dir_iterate(ext2_dblist dblist,
  27                                     int flags,
  28                                     char        *block_buf,
  29                                     int (*func)(ext2_ino_t dir,
  30                                                 int     entry,
  31                                                 struct ext2_dir_entry *dirent,
  32                                                 int     offset,
  33                                                 int     blocksize,
  34                                                 char    *buf,
  35                                                 void    *priv_data),
  36                                     void *priv_data)
  37 {
  38         errcode_t               retval;
  39         struct dir_context      ctx;
  40
  41         EXT2_CHECK_MAGIC(dblist, EXT2_ET_MAGIC_DBLIST);
  42
  43         ctx.dir = 0;
  44         ctx.flags = flags;
  45         if (block_buf)
  46                 ctx.buf = block_buf;
  47         else {
  48                 retval = ext2fs_get_mem(dblist->fs->blocksize, &ctx.buf);
  49                 if (retval)
  50                         return retval;
  51         }
  52         ctx.func = func;
  53         ctx.priv_data = priv_data;
  54         ctx.errcode = 0;
  55
  56         retval = ext2fs_dblist_iterate2(dblist, db_dir_proc, &ctx);
  57
  58         if (!block_buf)
  59                 ext2fs_free_mem(&ctx.buf);
  60         if (retval)
  61                 return retval;
  62         return ctx.errcode;
  63 }
  64
  65 static int db_dir_proc(ext2_filsys fs, struct ext2_db_entry2 *db_info,
  66                        void *priv_data)
  67 {
  68         struct ext2_inode       inode;
  69         struct dir_context      *ctx;
  70         int                     ret;
  71
  72         ctx = (struct dir_context *) priv_data;
  73         ctx->dir = db_info->ino;
  74         ctx->errcode = 0;
  75
  76         ctx->errcode = ext2fs_read_inode(fs, ctx->dir, &inode);
  77         if (ctx->errcode)
  78                 return DBLIST_ABORT;
  79         if (inode.i_flags & EXT4_INLINE_DATA_FL)
  80                 ret = ext2fs_inline_data_dir_iterate(fs, ctx->dir, ctx);
  81         else
  82                 ret = ext2fs_process_dir_block(fs, &db_info->blk,
  83                                                db_info->blockcnt, 0, 0,
  84                                                priv_data);
  85         if ((ret & BLOCK_ABORT) && !ctx->errcode)
  86                 return DBLIST_ABORT;
  87         return 0;
  88 }