Good day, I am using NetBSD 9.2 (amd64) with ZFS as file system and I have not found a command to change btime for my files. When I type stat command I see an entry called "Birth", I want to change the value under "Birth".
stat -f "atime: %Sa%nmtime: %Sm%nBirth (btime): %SB" /123.txt atime: Jun 19 07:29:04 2020 mtime: Jun 19 07:29:04 2020 Birth (btime): Jan 01 00:00:00 1970 touch command (touch -a -m -t [[CC]YY]MMDDhhmm[.ss] 123.text) unfortunately only supports changing the mtime and atime. Is there a command under NetBSD to change btime? If not can a command be added? I want to change btime because as you can see a lot of my .txt files got corrupted during a system change to NetBSD and now I need to manually change my btime timestamps but I haven't found a command. It seems that Unix systems in general do not have a command for this to correct corrupt or damaged btime timestamps. A suggestion would be to add a special command (e.g. SetTime -b) for NetBSD so that users get permission from the kernel to change btime. It should be made so that only in kernel mode there is the possibility to change btime. The btime can be set as you like it has no effect with the other timestamps. An example of exactly what I mean when I do it in Terminal. SetTime -b [[CC]YY]MMDDhhmm[.ss] 123.text stat -f "atime: %Sa%nmtime: %Sm%nBirth (btime): %SB" /123.txt atime: Jun 19 07:29:04 2020 mtime: Jun 19 07:29:04 2020 Birth (btime): Jun 28 17:04:37 2019 What would happen if by mistake btime has a higher value than atime and mtime? Also no problem, it should be generally integrated a note that the value is higher than the other values (atime and mtime), so the user can know that he should pay attention to the other values and if necessary make btime lower. An example (in this case I set the year 2030) SetTime -b [[CC]YY]MMDDhhmm[.ss] 123.text Note: btime has a higher value than atime and mtime stat -f "atime: %Sa%nmtime: %Sm%nBirth (btime): %SB" /123.txt atime: Jun 19 07:29:04 2020 mtime: Jun 19 07:29:04 2020 Birth (btime): Jan 1 00:00:00 2030
