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