Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

libutil: Fix mandoc warnings

- missing comma before name
- possible typo in section name: Sh CAVEAT instead of CAVEATS
- useless macro: Tn
- blank line in fill mode, using .sp
- no blank before trai

libutil: Fix mandoc warnings

- missing comma before name
- possible typo in section name: Sh CAVEAT instead of CAVEATS
- useless macro: Tn
- blank line in fill mode, using .sp
- no blank before trailing delimiter: Dv NULL?

MFC after: 3 days

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libutil: Document function HISTORY within the manpages

Reviewed by: bcr (mentor)
Approved by: bcr (mentor)
MFC after: 7 days
Differential Revision: https://reviews.freebsd.org/D24795

MFHead @348740

Sponsored by: The FreeBSD Foundation

Typo.

MFC after: 3 days
Sponsored by: The FreeBSD Foundation

MFH @ r337607, in preparation for boarding

Make pw_scan(3) more compatible with getpwent(3) et. al. when processing
data from /etc/passwd rather than /etc/master.passwd.

The libc getpwent(3) and related functions automatically read master.pa

Make pw_scan(3) more compatible with getpwent(3) et. al. when processing
data from /etc/passwd rather than /etc/master.passwd.

The libc getpwent(3) and related functions automatically read master.passwd
when run by root, or passwd when run by a non-root user. When run by non-
root, getpwent() copes with the missing data by setting the corresponding
fields in the passwd struct to known values (zeroes for numbers, or a
pointer to an empty string for literals). When libutil's pw_scan(3) was
used to parse a line without the root-accessible data, it was leaving
garbage in the corresponding fields.

These changes rename the static pw_init() function used by getpwent() and
friends to __pw_initpwd(), and move it into pw_scan.c so that common init
code can be shared between libc and libutil. pw_scan(3) now calls
__pw_initpwd() before __pw_scan(), just like the getpwent() family does, so
that reading an arbitrary passwd file in either format and parsing it with
pw_scan(3) returns the same results as getpwent(3) would.

This also adds a new pw_initpwd(3) function to libutil, so that code which
creates passwd structs from scratch in some manner that doesn't involve
pw_scan() can initialize the struct to the values expected by lots of
existing code, which doesn't expect to encounter NULL pointers or garbage
values in some fields.

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Merge from head

Catch up with head, primarily for the 1.14.4.0 firmware.

Merge ^/head r284737 through r285152.

Bump .Dd due to changes made in r285050 and r285053

Spotted by: loos
Approved by: loos

Improve pw_lock.3 text changed in r285050

Suggested by: wblock
Approved by: gnn

When passwd or group information is changed (by pw, vipw, chpass, ...)
temporary file is created and then a rename() call move it to official file.
This operation didn't have any check to make sure d

When passwd or group information is changed (by pw, vipw, chpass, ...)
temporary file is created and then a rename() call move it to official file.
This operation didn't have any check to make sure data was written to disk
and if a power cycle happens system could end up with a 0 length passwd
or group database.

There is a pfSense bug with more infor about it:

https://redmine.pfsense.org/issues/4523

The following changes were made to protect passwd and group operations:

* lib/libutil/gr_util.c:
- Replace mkstemp() by mkostemp() with O_SYNC flag to create temp file
- After rename(), fsync() call on directory for faster result

* lib/libutil/pw_util.c
- Replace mkstemp() by mkostemp() with O_SYNC flag to create temp file

* usr.sbin/pwd_mkdb/pwd_mkdb.c
- Added O_SYNC flag on dbopen() calls
- After rename(), fsync() call on directory for faster result

* lib/libutil/pw_util.3
- pw_lock() returns a file descriptor to master password file on success

Differential Revision: https://reviews.freebsd.org/D2978
Approved by: bapt
Sponsored by: Netgate

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Catch up with HEAD (r280229-r284686).

Merge from head

Merged ^/head r283871 through r284187.

revert r283969,283970 not needed anymore after r283981

Capitalize the list of accepted variables

Suggested by: wblock

Add a pw_mkdb2(3) function which does the same thing as pw_mkdb(3) except
it takes a new argument allowing to specify the endianness of the database
to generate

Differential Revision: https://review

Add a pw_mkdb2(3) function which does the same thing as pw_mkdb(3) except
it takes a new argument allowing to specify the endianness of the database
to generate

Differential Revision: https://reviews.freebsd.org/D2730
Reviewed by: ian

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Fix typo

IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

use .Mt to mark up email addresses consistently (part3)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

MFC @ r266724

An SVM update will follow this.