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.