MFC r326276:

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

MFC r309803:

Fix pw groupshow <gid>

PR: 204676
Submitted by: longwitz@incore.de

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Fix typo preventing pw {user,group}next -C from working as expected

Reported by: Mike Selnet via forums.freebsd.org
MFC after: 3 days

Restore dryrun support for pw groupmod

Initialize `quiet` to false so `pw groupnext` again prints out the next gid
by default

Reported by: Florian Degner <f.degner@gmx.de>
MFC after: 1 week
PR: 203876
Sponsored by: EMC / Isilon Storage Division

Avoid calling strlen() where we can use the strspn() return value.

Split some extra long lines

Cleanup a bit includes

Fix regression: report if a group already exists when creating it

Rewrite parsing subcommands arguments of pw(8)

Now each subcommands checks its arguments in a dedicated functions.

This helps improving input validation, code readability/maintainability
While here:
- Add a -y option to pw userdel/usermod so it can maintain NIS servers if
nispasswd is not defined in pw.conf(5)
- Allow pw -r <rootdir> to remove directory with userdel -r
- Fix bug when renaming a user which was not renaming the user name it groups
it is a member of.
- Only parse pw.conf(5) when needed.

Cast uid/git to uintmax_t when using printf-like functions so the size of
uid/gid size remains a implementation detail

Remove now unused variable

Rework groupmod modification:

Use gr_add(3) when possible to avoid code duplication.
Use a simpler logic to delete members of a group

Make a separate groupdel/userdel from the main function

Make separate functions to show users and groups

Move the quiet flag into the configuration structure

Separate usernext/groupnext from the main functions

Do not try to set password on group if the group is added as a consequence of
of creating a user (regression from r285136)

Reported by: Fabian Keil <fk@fabiankeil.de>

Also validate inputs of pw groupmod -h and groupmod -H

backout remove of -q option for pw [user|group] next

While the return code is broken, some corner case usage depends on the
functionnality, so backout until we get better regression tests covering those
corner case usage.

Fix typo

Remove '-q' support for pw [user|group] next

the intent of -q in this command is to return as exit status the value of the
next group/user id, which does not make sense given exit status are limited to
values between 0 and 255.

Fix duplicate checking

In case of rename validate the length of the new name

Check early that the new name fits MAXLOGNAME and store it in pwconf

Refactor input validation

Mutualize code to validate inputs of both 'user' and 'group' command
Test that the input name fits into MAXLOGNAME

Handle pretty print (-P) via global pwconf

Handle dryrun (-N) via global pwconf

Add a new global struct pwconf to store etcpath, rootdir and struct userconf

Do not add anymore -R and -V to arglist
Add an error message if both -V and -R are set in arguments

Instead of always casting the pw_checkname input to u_char * and casting it back
to char *, change pw_checkname to directly take char * in input

Cast to gid_t for groups not uid_t

Remove useless cast in printf and printf-like functions:
use %u for uid_t and gid_t

Cast -1 to uid_t and bump WARNING level to 3

Make pw_user()/pw_group() more consitent about errors

Some of errors were returned to the main function, some others caused a direct
exit via err(3).

The main function is only interested in EXIT_SUCCESS, so in all other cases
replace warn(3) + return err by err(3)

Revert r277652

uid and gid are never and should never be negative. The pw(8) manpage clearly
states the -u and -g arguments are for uids/gids, hence using negative values is
abusing a bug in former versions of pw(8)

Allow negative numbers in -u and -g options

PR: 196514
MFC after: 1 week

Do not delete the group wheel when bad argument is passed to pw groupdel -g

Check that the -g argument is actually a number, if not report an error.
This argument is converted without checking with atoi(3) later so without this
check it converts any alpha entries into 0 meaning it deletes the group wheel

Add a regression test about it

PR: 90114
Reported by: bkoenig@cs.tu-berlin.de
MFC after: 1 week

When a group is renamed then the group has been invalidated for sure.
In that case get the group information using the new name.

Add a regression test about this bug

PR: 193704
Reported by: az

Stop pw(8) from segfaulting when given certain input

PR:187310
Submitted by: Kim Shrier
Obtained from: bug
MFC after: 1 week

Fix a regression in "pw group show" introduced r242349:
print a newline after printing each group line.

PR: bin/174731
Submitted by: Jan Beich <jbeich@tormail.org>

Remove useless check for NULL prior to free.

Approved by: cperciva
MFC after: 2 weeks

Teach pw(8) about how to use pw/gr API to reduce code duplication

MFC after: 2 months

Add the groupmod '-d' option to pw to allow the deletion of existing users
from a group without the need to perform the same operation by replacing
the existing list via the '-M' option. The '-M' option requires someone
to fetch the existing members with pw, deleting the undesired members from
the list and sending the altered list back to pw.

Approved by: wes (mentor)
MFC after: 5 days

style(9) (verified no object changes)

Approved by: wes (mentor)
MFC after: 5 days

Add a `-H <fd>' option that is like `-h <fd>', but accepts an already
encrypted password on the specified file descriptor.

PR: bin/22033
MFC after: 2 weeks

Localize time/date.
Use ISO 8601 date in logs.
Fix wrong argument type in ctype functions.

Portability fixes for other bsd4.4 derivatives.

Add new functionality "lock" and "unlock" to provide a simple password
locking mechanism for users. This works by prepending the string
"*LOCKED*" to the password field in master.passwd to prevent successful
decoding.

Clean up error handling in fileupdate(), which now returns 0 on success
instead of a boolean. This replicated through he front-end sub-functions
relating to add, delete, modify entries in passwd & group files
Errno is now preserved so output of errc()/warnc() will be less obfuscated
by subsequent errors when reporting the problem.

Add more intelligent error handling when attempting to modify/delete NIS
entries with no corresponding local database entry.

[MFC to stable in a couple of weeks to keep both in sync]

$Id$ -> $FreeBSD$

1) Do not blindly ignore file update errors which may occur due to concurrent
updating
2) Add -V <etcdir>, which allows maintaining user/group database in alternate
locations other than /etc.

Use err(3) instead of local redefinition. Add rcsid string.

Revert $FreeBSD$ to $Id$

Yet another formatting consistency check.

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

1) 200 users per group limitation removed and pw
will handle lines of any length in /etc/group.
2) Fixed bug with usermod -d not updating user's home
directory.
3) Minor formatting display changes/fixes with *show -P.

Allow 8-bit characters in the passwd gecos field, and adds a paragraph
to the mangpage explaining the consequences (to be updated at a later
date after login class conf support is added).

This commit was generated by cvs2svn to compensate for changes in r20302,
which included commits to RCS files with non-trunk default branches.

Copyright update by the author, to be more in line with our sample
copyright.

Submitted by: David Nugent

Upgrade from the author, reflecting all my wishes resulting out of the
sysinstall use of this tool (plus some bug fixes).

2.2 candidate...

Submitted by: David Nugent <davidn@nserver.usn.blaze.net.au>

pw(8) -- a backend utility to manage the user and group databases.

sysinstall's new User&group menu will use it, hence it's a 2.2
candidate despite of providing new functionality.

Submitted by: David L. Nugent, <davidn@blaze.net.au>