mirror of https://github.com/vitalif/e2fsprogs
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/*
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* newdir.c --- create a new directory block
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*
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* Copyright (C) 1994 Theodore Ts'o. This file may be redistributed
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* under the terms of the GNU Public License.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <linux/ext2_fs.h>
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#include "ext2fs.h"
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/*
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* Create new directory block
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*/
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errcode_t ext2fs_new_dir_block(ext2_filsys fs, ino_t dir_ino, ino_t parent_ino,
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char **block)
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{
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char *buf;
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struct ext2_dir_entry *dir = NULL;
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int rec_len;
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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buf = malloc(fs->blocksize);
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if (!buf)
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return ENOMEM;
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memset(buf, 0, fs->blocksize);
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dir = (struct ext2_dir_entry *) buf;
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dir->rec_len = fs->blocksize;
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if (dir_ino) {
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/*
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* Set up entry for '.'
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*/
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dir->inode = dir_ino;
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dir->name_len = 1;
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dir->name[0] = '.';
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rec_len = dir->rec_len - EXT2_DIR_REC_LEN(dir->name_len);
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dir->rec_len = EXT2_DIR_REC_LEN(dir->name_len);
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/*
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* Set up entry for '..'
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*/
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dir = (struct ext2_dir_entry *) (buf + dir->rec_len);
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dir->rec_len = rec_len;
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dir->inode = parent_ino;
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dir->name_len = 2;
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dir->name[0] = '.';
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dir->name[1] = '.';
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}
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*block = buf;
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return 0;
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}
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