Date: Sat, 17 Aug 2002 04:14:51 -0700 (PDT) From: Jens Schweikhardt <schweikh@FreeBSD.org> To: pdp@nl.demon.net, schweikh@FreeBSD.org, freebsd-bugs@FreeBSD.org Subject: Re: kern/25777: atime not updated on exec Message-ID: <200208171114.g7HBEpaF018882@freefall.freebsd.org>
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Synopsis: atime not updated on exec
State-Changed-From-To: open->feedback
State-Changed-By: schweikh
State-Changed-When: Sat Aug 17 04:08:46 PDT 2002
State-Changed-Why:
It is not clear if atime needs to be updated upon exec'ing a file.
Here's what the current IEEE Std 1003.1-2001 has to say:
"File Times Update
Each file has three distinct associated time values: st_atime, st_mtime,
and st_ctime. The st_atime field is associated with the times that the
file data is accessed; st_mtime is associated with the times that the
file data is modified; and st_ctime is associated with the times that
the file status is changed. These values are returned in the file
characteristics structure, as described in <sys/stat.h> .
Each function or utility in IEEE Std 1003.1-2001 that reads or writes
^^^^^^^^^^^^^^^
data or changes file status indicates which of the appropriate
time-related fields shall be "marked for update". If an implementation
of such a function or utility marks for update a time-related field not
specified by IEEE Std 1003.1-2001, this shall be documented, except that
any changes caused by pathname resolution need not be documented. For
the other functions or utilities in IEEE Std 1003.1-2001 (those that are
not explicitly required to read or write file data or change file
status, but that in some implementations happen to do so), the effect is
unspecified. [...]"
If we associate "reading" and "writing" with the rwx bits, then
to execute you don't need to "read" a file.
Bruce (bde), what's your view?
http://www.freebsd.org/cgi/query-pr.cgi?pr=25777
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