Allow supplementary groups to be set via the /etc/default/useradd config
file. Allowing an administrator to set additonal groups via the GROUPS
configurable and control the default behaviour of useradd.
The groupadd from shadow does not allow upper case group names, the
same is true for the upstream shadow. But distributions like
Debian/Ubuntu/CentOS has their own way to cope with this problem,
this patch is picked up from Fedora [1] to relax the usernames
restrictions to allow the upper case group names, and the relaxation is
POSIX compliant because POSIX indicate that usernames are composed of
characters from the portable filename character set [A-Za-z0-9._-].
[1] https://src.fedoraproject.org/rpms/shadow-utils/blob/rawhide/f/shadow-4.8-goodname.patch
Signed-off-by: Alexander Kanavin <alex@linutronix.de>
In some circumstances I want the default behaviour of useradd to
not add user entries to the lastlog and faillog databases. Allowing
this options behaviour to be controlled by the config file
/etc/default/useradd.
Explanation: clarify the useradd -d parameter as it does create directory HOME_DIR if it doesn't exit.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1677005
Changelog: [serge] minor tweak to the text
This option can be used to set a separate mode for useradd(8) and
newusers(8) to create the home directories with.
If this option is not set, the current behavior of using UMASK
or the default umask is preserved.
There are many distributions that set UMASK to 077 by default just
to create home directories not readable by others and use things like
/etc/profile, bashrc or sudo configuration files to set a less
restrictive
umask. This has always resulted in bug reports because it is hard
to follow as users tend to change files like bashrc and are not about
setting the umask to counteract the umask set in /etc/login.defs.
A recent change in sudo has also resulted in many bug reports about
this. sudo now tries to respect the umask set by pam modules and on
systems where pam does not set a umask, the login.defs UMASK value is
used.
As the large uids are usually provided by remote user identity and
authentication service, which also provide user login tracking,
there is no need to create a huge sparse file for them on every local
machine.
fixup! login.defs: Add LASTLOG_UID_MAX variable to limit lastlog to small uids.
man/pwconv.8.xml, man/useradd.8.xml, man/userdel.8.xml,
man/usermod.8.xml, man/vipw.8.xml: Document the usage of the
TCB_AUTH_GROUP, TCB_SYMLINKS, and USE_TCB configuration
parameters.
* man/pwconv.8.xml, man/pwck.8.xml: Document the behavior when
USE_TCB is enabled.
Harmonize formatting of login.defs and default/useradd variables.
Use an <option> tag.
* man/usermod.8.xml: Added reference to gshadow(5).
* man/login.defs.d/USERDEL_CMD.xml: Shorten the lines of the
USERDEL_CMD example.
man/groupadd.8.xml, man/usermod.8.xml, man/chgpasswd.8.xml,
man/groupmod.8.xml: Added warning: passwords set with these tools
may not respect the password policy.
man/useradd.8.xml: Added note to warn about insecurity in using
--password.
* man/groupmod.8.xml: Removed not regarding default if --password
is not used. This was a cut&paste from groupadd.8.xml.
* man/passwd.1.xml: Split some paragraphs.
* man/passwd.1.xml: Recommend other encryption methods than DES.
SELinux user for user's login.
* NEWS, src/usermod.c, man/usermod.8.xml: Likewise.
* libmisc/system.c, libmisc/Makefile.am, lib/prototypes.h: Added
safe_system(). Used to run semanage.
* lib/prototypes.h, libmisc/copydir.c: Make a
selinux_file_context() an extern function.
* libmisc/copydir.c: Reset SELinux to create files with default
contexts at the end of copy_tree().
* NEWS, src/userdel.c: Delete the SELinux user mapping for user's
login.
