mirror of https://github.com/vitalif/e2fsprogs
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/*
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* newdir.c --- create a new directory block
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*
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* Copyright (C) 1994, 1995 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include <stdio.h>
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#include <string.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if EXT2_FLAT_INCLUDES
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#include "ext2_fs.h"
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#else
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#include <linux/ext2_fs.h>
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#endif
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#include "ext2fs.h"
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#ifndef EXT2_FT_DIR
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#define EXT2_FT_DIR 2
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#endif
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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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struct ext2_dir_entry *dir = NULL;
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errcode_t retval;
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char *buf;
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int rec_len;
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int filetype = 0;
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struct ext2fs_sb *sb;
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
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if (retval)
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return retval;
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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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sb = (struct ext2fs_sb *) fs->super;
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if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_FILETYPE)
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filetype = EXT2_FT_DIR << 8;
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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 | filetype;
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dir->name[0] = '.';
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rec_len = dir->rec_len - EXT2_DIR_REC_LEN(1);
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dir->rec_len = EXT2_DIR_REC_LEN(1);
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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 | filetype;
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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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