Date: Sun, 03 Mar 2024 11:30:48 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 275465] "tail -F/f foo" doesn't show the file content when foo is truncated Message-ID: <bug-275465-227-fA35URB8NR@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-275465-227@https.bugs.freebsd.org/bugzilla/> References: <bug-275465-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275465 Daniel Tameling <tamelingdaniel@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tamelingdaniel@gmail.com --- Comment #2 from Daniel Tameling <tamelingdaniel@gmail.com> --- I think that the kevent in forward.c doesn't return for the truncation itse= lf but only after the truncation + write. At that point, the code can't figure= out whether it needs to reread the entire file. It just sees the difference in = file sizes. See for example: $ touch test.txt=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 $ echo -n 123 > test.txt=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20 $ echo -n 456789 > test.txt=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20 $ echo -n a > test.txt=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 $ echo -n bcdef > test.txt gives the output $ tail -f test.txt=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 123789cdef --=20 You are receiving this mail because: You are the assignee for the bug.=
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