On Wed, May 04, 2005 at 10:45:06AM +0200, richard.mouli@axa.be wrote: > That my first post in this mailing list. Please note I am not subscribed and > I would like to get your replies sent back to me, thanks. It helps if you set the Mail-Followup-To header in your email program if possible. If that's not possible it helps to get a better email program. ;) I'll put that header in now and see if that helps. Putting yourself in a Cc: field may help as well. > I recently wrote scripts that relies on relative dates (they do "intensive" > date manipulations). I encountered the following problem: > #: date -d "today -1 week" > Wed Apr 27 09:54:18 CEST 2005 > #: date -d "today - 1 week" > Wed May 11 09:54:22 CEST 2005 > > What seems to be the same (note the space between the dash and the one) does > not report the same result! What *seems* to be the same is actually *not* the same. Note the space between the dash and the one. That is a difference so it does not report the same result! :) See the info manual from coreutils.info, Node: General date syntax. I reached it via 'info date' -> Options for date -> Date input formats. It says there: "Hyphens not followed by a digit are currently ignored." So in practice your first command calculates the current date minus one week: #: date -d "today -1 week" and your second command calculates the current date plus one week: #: date -d "today 1 week" > Should this be reported as a bug (and how)? It's not a bug; it is the behaviour described in the docs. If this would be a real bug, I would recommend the reportbug tool from package reportbug. HTH, -- Maurits van Rees | http://maurits.vanrees.org/ [Dutch/Nederlands] Public GnuPG key: keyserver.net ID 0x1735C5C2 "Let your advance worrying become advance thinking and planning." - Winston Churchill
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