dd.c File Reference

Implementation of dd command for BSFS. More...

Macros
#define	DEFAULT_BLOCK_SIZE   512
#define	MAX_BUFFER_SIZE   (64 * 1024)

Functions
int	dd (FILE *disk, superblock_t *sb, char **args)
	Generate a file by copying blocks from /dev/zero or /dev/random.

Variables
char	current_path []
	Current working directory text (provided by the browser prompt)

Detailed Description

Implementation of dd command for BSFS.

Creates files of specified size to test filesystem capacity and functionality.

Usage: dd if=<input> of=<output> bs=<block_size> count=<blocks>

• if: input source (e.g., /dev/zero, /dev/random)
• of: output path (destination file)
• bs: block size (supports K/M/G suffixes)
• count: number of blocks to write

Macro Definition Documentation

DEFAULT_BLOCK_SIZE

#define DEFAULT_BLOCK_SIZE   512

Default block size in bytes.

MAX_BUFFER_SIZE

#define MAX_BUFFER_SIZE   (64 * 1024)

Maximum allowed buffer size.

Function Documentation

dd()

int dd	(	FILE *	disk,
		superblock_t *	sb,
		char **	args )

Generate a file by copying blocks from /dev/zero or /dev/random.

Usage: dd if=/dev/zero of=<file> bs=<size> count=<n>

Parameters

disk	Open filesystem image.
sb	Loaded superblock.
args	Key-value args (if/of/bs/count) parsed by the command.

Returns

1 to continue the REPL.