143 lines
2.8 KiB
C
143 lines
2.8 KiB
C
/*
|
|
* mkdir.c --- make a directory in the filesystem
|
|
*
|
|
* Copyright (C) 1994, 1995 Theodore Ts'o.
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the GNU Public
|
|
* License.
|
|
* %End-Header%
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
#include <time.h>
|
|
#if HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
#if HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
#include "ext2_fs.h"
|
|
#include "ext2fs.h"
|
|
|
|
#ifndef EXT2_FT_DIR
|
|
#define EXT2_FT_DIR 2
|
|
#endif
|
|
|
|
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
|
|
const char *name)
|
|
{
|
|
errcode_t retval;
|
|
struct ext2_inode parent_inode, inode;
|
|
ext2_ino_t ino = inum;
|
|
ext2_ino_t scratch_ino;
|
|
blk_t blk;
|
|
char *block = 0;
|
|
|
|
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
|
|
|
|
/*
|
|
* Allocate an inode, if necessary
|
|
*/
|
|
if (!ino) {
|
|
retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
|
|
0, &ino);
|
|
if (retval)
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Allocate a data block for the directory
|
|
*/
|
|
retval = ext2fs_new_block(fs, 0, 0, &blk);
|
|
if (retval)
|
|
goto cleanup;
|
|
|
|
/*
|
|
* Create a scratch template for the directory
|
|
*/
|
|
retval = ext2fs_new_dir_block(fs, ino, parent, &block);
|
|
if (retval)
|
|
goto cleanup;
|
|
|
|
/*
|
|
* Get the parent's inode, if necessary
|
|
*/
|
|
if (parent != ino) {
|
|
retval = ext2fs_read_inode(fs, parent, &parent_inode);
|
|
if (retval)
|
|
goto cleanup;
|
|
} else
|
|
memset(&parent_inode, 0, sizeof(parent_inode));
|
|
|
|
/*
|
|
* Create the inode structure....
|
|
*/
|
|
memset(&inode, 0, sizeof(struct ext2_inode));
|
|
inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
|
|
inode.i_uid = inode.i_gid = 0;
|
|
inode.i_blocks = fs->blocksize / 512;
|
|
inode.i_block[0] = blk;
|
|
inode.i_links_count = 2;
|
|
inode.i_ctime = inode.i_atime = inode.i_mtime = time(NULL);
|
|
inode.i_size = fs->blocksize;
|
|
|
|
/*
|
|
* Write out the inode and inode data block
|
|
*/
|
|
retval = ext2fs_write_dir_block(fs, blk, block);
|
|
if (retval)
|
|
goto cleanup;
|
|
retval = ext2fs_write_new_inode(fs, ino, &inode);
|
|
if (retval)
|
|
goto cleanup;
|
|
|
|
/*
|
|
* Link the directory into the filesystem hierarchy
|
|
*/
|
|
if (name) {
|
|
retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
|
|
&scratch_ino);
|
|
if (!retval) {
|
|
retval = EXT2_ET_DIR_EXISTS;
|
|
name = 0;
|
|
goto cleanup;
|
|
}
|
|
if (retval != EXT2_ET_FILE_NOT_FOUND)
|
|
goto cleanup;
|
|
retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
|
|
if (retval)
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Update parent inode's counts
|
|
*/
|
|
if (parent != ino) {
|
|
parent_inode.i_links_count++;
|
|
retval = ext2fs_write_inode(fs, parent, &parent_inode);
|
|
if (retval)
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Update accounting....
|
|
*/
|
|
ext2fs_block_alloc_stats(fs, blk, +1);
|
|
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
|
|
|
|
cleanup:
|
|
if (block)
|
|
ext2fs_free_mem(&block);
|
|
return retval;
|
|
|
|
}
|
|
|
|
|