Ian Dowse wrote: > In message <[EMAIL PROTECTED]>, Terry Lambert writes: > >I think the reason for the "if" is to keep the df from hanging > >indefinitely, particularly when you give it an explicit list. > > No, I believe the "if (vfslist != NULL)" code was there to reduce > the maximum column widths to those necessary for an explicit list > of filesystems rather than using the maximum widths for all > filesystems. The regetmntinfo() call before the "if" has already > performed any operations that could hang indefinitely, so it makes > sense to unconditionally use these up-to-date results instead of > the potentially stale list from getmntinfo(..., MNT_NOWAIT).
Like "ps", "df" is a snapshot. As such, "staleness" after a few tenths of a second is really irrelevent, since the information is never really "the real and precise information". It's more important to be able to get information in a misbehaving system, without hanging your shell forever. 8-(. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
