Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

du_test: Skip three tests if sparse files are not supported

This fixes running the du tests with /tmp as tmpfs (which is what we do in the
CheriBSD CI).

Obtained from: CheriBSD
Reviewed By: ngie
Di

du_test: Skip three tests if sparse files are not supported

This fixes running the du tests with /tmp as tmpfs (which is what we do in the
CheriBSD CI).

Obtained from: CheriBSD
Reviewed By: ngie
Differential Revision: https://reviews.freebsd.org/D28398

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du: tests: use dollar-single quotes where appropriate

No need for "foo$(printf "\t")", $'\t' is both more readable and still
functional.

Reported-by: Jamie Landeg-Jones <jamie@catflap.org>

du: tests: make H_flag tests more strict about output requirements

The current version of this test will effectively pass as long as one of the
specified paths is in the output, and it could even be

du: tests: make H_flag tests more strict about output requirements

The current version of this test will effectively pass as long as one of the
specified paths is in the output, and it could even be a subset of one of
the paths.

Strengthen up the test a little bit:
* Specify beginning/end anchors for each path
* Add egrep -v checks to make sure we don't have any *additional* paths
* Ratchet down paths2 to exactly the two paths we expect to appear

Reviewed by: ngie
Differential Revision: https://reviews.freebsd.org/D27984

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du: tests: fix the H_flag test (primarily grep usage)

This test attempts to use \t (tab intended) in a grep expression. With the
former /usr/bin/grep (i.e. gnugrep), this was interpreted as a liter

du: tests: fix the H_flag test (primarily grep usage)

This test attempts to use \t (tab intended) in a grep expression. With the
former /usr/bin/grep (i.e. gnugrep), this was interpreted as a literal 't'.
The expression would work anyways because the tr(1) usage would ultimately
replace all of the spaces with a single newline, and they would match the
paths whether they were correctly fromatted or not.

Current /usr/bin/grep (i.e. bsdgrep) is less-tolerant of ordinary-escapes, a
property of the underlying regex(3) engine, to make it easier to identify
when stuff like this happens. In-fact, this expression broke after the
switch happened.

This revision does the bare basics to fix the usage by using a printf to get
a literal tab character to insert into the expression. It also swaps out the
manual insertion of the line prefix into the grep expression by pulling
that part out of $sep and reusing it for the leading path.

The secondary issue was the tr(1) usage, since tr would only replace the
first character of string1 with the first character of string2. This has
instead been replaced by a sed expression, which similary understands \n to
be a newline on all supported versions of FreeBSD. Each path now gets
prefixed with the appropriate context that should be there (i.e. numeric
sequence followed by a tab).

PR: 252446
Reviewed by: emaste, ngie
Differential Revision: https://reviews.freebsd.org/D27983

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MFHead @347527

Sponsored by: The FreeBSD Foundation

Update the spelling of my name

Previous spellings of my name (NGie, Ngie) weren't my legal spelling. Use Enji
instead for clarity.

While here, remove "All Rights Reserved" from copyrights I "own".

Update the spelling of my name

Previous spellings of my name (NGie, Ngie) weren't my legal spelling. Use Enji
instead for clarity.

While here, remove "All Rights Reserved" from copyrights I "own".

MFC after: 1 week

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MFhead@r322451

Merge ^/head r321383 through r322397.

du(1): Add --si option to display in terms of powers of 1000

Reviewed by: cem (earlier version), emaste
Approved by: emaste (mentor)
Differential Revision: https://reviews.freebsd.org/D11748

Merge ^/head r319801 through r320041.

Add some initial basic tests for du(1)

Tests that exercise the following flags are added in this commit:
- -A
- -H
- -I
- -g
- -h
- -k
- -m

Additional tests will be added soon.

MFC after: 1 month