- 1 year ago
Does cmd.exe write to stdout/stderr?
Yes, cmd.exe
(the Windows Command Prompt) writes to both stdout
(standard output) and stderr
(standard error). By default, output produced by commands in the Command Prompt is sent to the stdout
stream, and error messages are sent to the stderr
stream.
You can redirect and handle these streams in various ways:
Redirecting
stdout
to a file:bashcommand > output.txt
Redirecting
stderr
to a file:bashcommand 2> error.txt
Redirecting both
stdout
andstderr
to separate files:luacommand > output.txt 2> error.txt
Redirecting both
stdout
andstderr
to the same file:bashcommand > output.txt 2>&1
Discarding
stdout
andstderr
output:bashcommand > nul 2> nul
Keep in mind that the behavior of command output may vary depending on the specific command being executed. Some commands may use stdout
for normal output and stderr
for error messages, while others may use both streams for different types of output.
In addition to redirection, you can also use cmd.exe
built-in features like piping (|
) to pass the output of one command as input to another, and you can use batch files or scripts to handle output in more complex ways.