Many files:

  Checkin of e2fsprogs 0.5b

1 files changed, 133 insertions, 0 deletions

diff --git a/lib/ext2fs/mkdir.c b/lib/ext2fs/mkdir.c
new file mode 100644
index 00000000..03e49d8f
--- /dev/null
+++ b/lib/ext2fs/mkdir.c
@@ -0,0 +1,133 @@
+/*
+ * mkdir.c --- make a directory in the filesystem
+ * 
+ * Copyright (C) 1994 Theodore Ts'o.  This file may be redistributed
+ * under the terms of the GNU Public License.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <linux/fs.h>
+#include <linux/ext2_fs.h>
+
+#include "ext2fs.h"
+
+errcode_t ext2fs_mkdir(ext2_filsys fs, ino_t parent, ino_t inum,
+		       const char *name)
+{
+	errcode_t		retval;
+	struct ext2_inode	inode;
+	ino_t			ino = inum;
+	ino_t			scratch_ino;
+	blk_t			blk;
+	char			*block = 0;
+	int			group;
+
+	/*
+	 * Allocate an inode, if necessary
+	 */
+	if (!ino) {
+		retval = ext2fs_new_inode(fs, parent, 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;
+
+	/*
+	 * Create the inode structure....
+	 */
+	memset(&inode, 0, sizeof(struct ext2_inode));
+	inode.i_mode = S_IFDIR | 0755;
+	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 = io_channel_write_blk(fs->io, blk, 1, block);
+	if (retval)
+		goto cleanup;
+	retval = ext2fs_write_inode(fs, ino, &inode); 
+	if (retval)
+		goto cleanup;
+
+	/*
+	 * Update parent inode's counts
+	 */
+	if (parent != ino) {
+		retval = ext2fs_read_inode(fs, parent, &inode);
+		if (retval)
+			goto cleanup;
+		inode.i_links_count++;
+		retval = ext2fs_write_inode(fs, parent, &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 = EEXIST;
+			name = 0;
+			goto cleanup;
+		}
+		if (retval != ENOENT)
+			goto cleanup;
+		retval = ext2fs_link(fs, parent, name, ino, 0);
+		if (retval)
+			goto cleanup;
+	}
+
+	/*
+	 * Update accounting....
+	 */
+	ext2fs_mark_block_bitmap(fs, fs->block_map, blk);
+	ext2fs_mark_bb_dirty(fs);
+	ext2fs_mark_inode_bitmap(fs, fs->inode_map, ino);
+	ext2fs_mark_ib_dirty(fs);
+
+	group = ext2fs_group_of_blk(fs, blk);
+	fs->group_desc[group].bg_free_blocks_count--;
+	group = ext2fs_group_of_ino(fs, ino);
+	fs->group_desc[group].bg_free_inodes_count--;
+	fs->group_desc[group].bg_used_dirs_count++;
+	fs->super->s_free_blocks_count--;
+	fs->super->s_free_inodes_count--;
+	ext2fs_mark_super_dirty(fs);
+	
+cleanup:
+	if (block)
+		free(block);
+	return retval;
+
+}
+
+