Public bug reported:
The man page for the adduser utility clearly states the exit code
behavior to be expected as:
EXIT VALUES
0 The user exists as specified. This can have 2 causes: The user
was created by adduser or the user was already present on the system before
adduser was invoked. If adduser was returning 0 , invoking adduser a second
time with the same parameters as before also returns 0.
1 Creating the user or group failed because it was already present
with other UID/GID than specified. The username or groupname was rejected
because of a mismatch with the configured regular expressions, see
adduser.conf(5). Adduser has been aborted by a signal.
Or for many other yet undocumented reasons which are printed to
console then. You may then consider to remove --quiet to make adduser more
verbose.
In actual operation, adduser returns 1 if the user already exists. The
documented behavior would be preferable.
System details:
Description: Ubuntu 12.04.5 LTS
Release: 12.04
adduser:
Installed: 3.113ubuntu2
Candidate: 3.113ubuntu2
Version table:
*** 3.113ubuntu2 0
500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: adduser 3.113ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-49.81~precise1-generic 3.13.11-ckt17
Uname: Linux 3.13.0-49-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Mon Aug 31 16:43:48 2015
InstallationMedia: Ubuntu-Server 12.04.3 LTS "Precise Pangolin" - Release amd64
(20130820.2)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: adduser
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: adduser (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise
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https://bugs.launchpad.net/bugs/1490777
Title:
adduser does not behave as documented in man page
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