src/usr.bin/cmp/tests, branch main

tests: Avoid sleep when causing a write error

2026-06-03T22:10:08+00:00

Cause a write error using a fifo and wait, rather than needing a sleep
to wait for something to terminate. This is faster and avoids a
potential test failure on a heavily loaded system.

Using /dev/full would be simpler, but it is not portable enough (it
tends not to be available in jails, even). Starting programs with stdout
not open or only open for read/execute/search may have unexpected side
effects.

Reviewed by:	ngie, des
Differential Revision:	https://reviews.freebsd.org/D57213

Improve reliability of stdout tests.

2024-11-14T19:41:47+00:00

If the test runner is under heavy load, the command we are testing may
succeed in printing to stdout before the dummy receiver has terminated.
Add a short delay to reduce the likelihood of this happening.

MFC after:	1 week
Sponsored by:	Klara, Inc.
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D47572

cmp: Check the status of stdout.

2024-10-09T12:11:43+00:00

POSIX requires us to print an error message and exit non-zero if
writing to stdout fails.  This can only happen if sflag is unset.

MFC after:	3 days
Sponsored by:	Klara, Inc.
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D47020

cmp: Style and type issues.

2024-10-09T12:11:42+00:00

MFC after:	3 days
Sponsored by:	Klara, Inc.
Reviewed by:	0mp, markj
Differential Revision:	https://reviews.freebsd.org/D47019

Remove residual blank line at start of Makefile

2024-07-15T22:43:39+00:00

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

2023-08-16T17:55:03+00:00

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

2023-05-12T16:44:03+00:00

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with:		pfg
MFC After:		3 days
Sponsored by:		Netflix

cmp: add -b, --print-bytes

2021-09-29T18:04:57+00:00

This is compatible with GNU cmp.

Reviewed by:	bapt, markj (earlier version)
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32074

cmp: add -i, --ignore-initial, an alternative to skip1/skip2 args

2021-09-29T18:03:34+00:00

This is compatible with GNU cmp.

Reviewed by:	markj
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32073

cmp: add -n, --bytes to limit number of bytes to compare

2021-09-29T18:03:34+00:00

This is compatible with GNU cmp.

Reviewed by:	markj
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32072