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u-boot/doc/usage/cmd/cat.rst
Roger Knecht 690a1d6948 cmd: cat: add new command
Add cat command to print file content to standard out

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Roger Knecht <rknecht@pm.me>
2022-10-11 15:40:48 -04:00

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.. SPDX-License-Identifier: GPL-2.0+:
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.