cat command

Synopsis

cat <interface> <dev[:part]> <file>

Description

The cat command prints the file content to standard out.

interface

interface for accessing the block device (mmc, sata, scsi, usb, ….)

dev

device number

part

partition number, defaults to 1

file

path to file

Example

Here is the output for a example text file:

=> cat mmc 0:1 hello
hello world
=>

Configuration

The cat command is only available if CONFIG_CMD_CAT=y.

Return value

The return value $? is set to 0 (true) if the file is readable, otherwise it returns a non-zero error code.