Consider increasing group name max length in shadow

[Armin]

Default group name length is 16 I believe but user name is 32. Consider increasing group name length to 32 too. Use the following switch

--with-group-name-max-length=32

I had problems with systemd groups whose names are a bit over 16 chars long.

[bdubbs@…]

Right now the longest group name we have in LFS is systemd-journal which is 15 characters. The second longest is messagebus at 10 characters. The first is systemd only, the second is for dbus that in the current LFS/BLFS instantiation is optional.

How about just adding the switch to command explanations and let users decide if it's needed.

[Armin]

Whatever ... I'd like user/group name length to be the same. Most common practice is having same user and group name. And user can choose any that he/she might like.

[bdubbs@…]

Good point. I'll make the change at next update cycle, probably in about a week.

[bdubbs@…]

Fixed at revision 10577.

[William Harrington]

Not needed.

The books use cat to edit the groups and shadow entries.

The configure option isn't needed. The only time it is an issue is when using any of the shadow utils which use the max length option.

The longest is systemd-bus-proxy which is 18 chars long. Not quite 32.

"is_valid_{user,group}_name" functions are called by groupad, groupmod, grpck, newusers, pwck, useradd, and usermod"

Chris and I were researching this and if ya going to use any of those above in BLFS to create users or groups then it'd be a problem.

Since the base book should create those users that is not a problem.

[Armin]

See comment 2. This isn't about systemd at all. It is to be consistent with user name length, since most common practice nowadays is to use same user/group name for usernames added by sysadmin.

[bdubbs@…]

Although it's not, strictly speaking, needed for LFS or BLFS, it is a nice feature to have and it certainly does not hurt anything. I'll leave it in.

WorksForMe.