a2b529ead2
--help and help are successful commands so output should not go to error.
QE teams have requested this change, also users doing docker help | less
or docker run --help | less would expect this to work.
Usage statement should only be printed when the user asks for it.
Errors should print error message and then suggest the docker COMMAND --help
command to see usage information.
The current behaviour causes the user to have to search for the error message
and sometimes scrolls right off the screen. For example a error on a
"docker run" command is very difficult to diagnose.
Finally erros should always exit with a non 0 exit code, if the user
makes a CLI error.
Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)
1.3 KiB
% DOCKER(1) Docker User Manuals % Docker Community % JUNE 2014
NAME
docker-logs - Fetch the logs of a container
SYNOPSIS
docker logs [-f|--follow[=false]] [--help] [-t|--timestamps[=false]] [--tail[="all"]] CONTAINER
DESCRIPTION
The docker logs command batch-retrieves whatever logs are present for a container at the time of execution. This does not guarantee execution order when combined with a docker run (i.e. your run may not have generated any logs at the time you execute docker logs).
The docker logs --follow command combines commands docker logs and docker attach. It will first return all logs from the beginning and then continue streaming new output from the container’s stdout and stderr.
OPTIONS
--help Print usage statement
-f, --follow=true|false Follow log output. The default is false.
-t, --timestamps=true|false Show timestamps. The default is false.
--tail="all" Output the specified number of lines at the end of logs (defaults to all logs)
HISTORY
April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on docker.com source material and internal work. June 2014, updated by Sven Dowideit SvenDowideit@home.org.au July 2014, updated by Sven Dowideit SvenDowideit@home.org.au