.. SPDX-License-Identifier: GPL-2.0+: | |
.. index:: | |
single: cat (command) | |
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. |