utimes(2): changing the birth time
Hi, Is there a way to set birth time to a value greater(newer) than the actual birth time (not in the future, but not the current time)? The man page utimes(2) says that is only possible to change to an older value. I saw a way to do this by opening a new file, coping the data, setting the other attributes, then calling utimes 2 times to set the birth and the modification time. Is there a way to change it without creating a new file? Thanks in advance. -- Knoseeker ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to freebsd-hackers-unsubscr...@freebsd.org
Re: utimes(2): changing the birth time
On Wed, 12 May 2010 17:53:38 + Knowledge Seeker knosee...@googlemail.com wrote: Hi, Is there a way to set birth time to a value greater(newer) than the actual birth time (not in the future, but not the current time)? The man page utimes(2) says that is only possible to change to an older value. I saw a way to do this by opening a new file, coping the data, setting the other attributes, then calling utimes 2 times to set the birth and the modification time. Is there a way to change it without creating a new file? Not with the current code. vfs_syscalls.c:setutimes() explicitly checks that the new time is less than va_birthtime. Interestingly enough, there's code in the routine to handle what this comment in utimes(2) mentions, but it's not implemented yet. Ideally a new system call will be added that allows the setting of all three times at once. -- Gary Jennejohn ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to freebsd-hackers-unsubscr...@freebsd.org
Re: utimes(2): changing the birth time
On 12 May 2010 22:38, Gary Jennejohn gljennj...@googlemail.com wrote: On Wed, 12 May 2010 17:53:38 + Knowledge Seeker knosee...@googlemail.com wrote: Hi, Is there a way to set birth time to a value greater(newer) than the actual birth time (not in the future, but not the current time)? The man page utimes(2) says that is only possible to change to an older value. I saw a way to do this by opening a new file, coping the data, setting the other attributes, then calling utimes 2 times to set the birth and the modification time. Is there a way to change it without creating a new file? Not with the current code. vfs_syscalls.c:setutimes() explicitly checks that the new time is less than va_birthtime. Interestingly enough, there's code in the routine to handle what this comment in utimes(2) mentions, but it's not implemented yet. Ideally a new system call will be added that allows the setting of all three times at once. btw, there's a paper someone can find something interesting at. http://www.usenix.org/events/bsdcon03/tech/full_papers/mckusick/mckusick_html/ -- wbr, pluknet ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to freebsd-hackers-unsubscr...@freebsd.org
