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touch: Allow setting the timestamp to -1.

Description

touch: Allow setting the timestamp to -1.

Note that VFS internally interprets a timestamp of -1 as “do not set”,
so this has no effect, but at least touch won't incorrectly reject the
given date / time (1969-12-31 23:59:59 UTC) as invalid.

While here, fix some style issues.

MFC after: 1 week
Reviewed by: allanjude
Differential Revision: https://reviews.freebsd.org/D44504

(cherry picked from commit aa69e0f212630bd6d4ec1c3c54e117be16653e8a)

touch: Add unit tests.

MFC after: 1 week
Reviewed by: bapt
Differential Revision: https://reviews.freebsd.org/D44505

(cherry picked from commit 74a4aa9b1517d92bfa85b0b1cd7d4c1262bb1ef9)

Details

Provenance
desAuthored on Mar 27 2024, 10:03 AM
Reviewer
allanjude
Differential Revision
D44504: touch: Allow setting the timestamp to -1.
Parents
rG662dc74155ad: tzcode: Clean up the ctime(3) manual page.
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