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Well, this is Boston Linux and UNIX, so it qualifies. This is pretty mystifying. My best guess is that the directory is hosed. Unix directories are just files, like any other: they have owners and permissions, and processes which have sufficient permissions can lock them. If the directory is being actually modified, then it could be locked against read for an instant. If something is rapidly creating and deleting files, the probability that you will try to read the directory during the instant it is locked will increase. Unix filesystems do all sorts of strange things by design. For example, you can delete an open file, and then when it is closed and its reference count drops to zero, it will be purged. This is strange. -- Mike On 2001-01-18 at 10:46 -0500, Ron Peterson wrote: > Not strictly a linux question, but I'm hoping someone on this list might > have some insight. How can a file disappear and then reappear again? I > know that sounds ridiculous, but look at the following: > > # ls -li passwd ; date > 63444 -rw-r--r-- 1 root system 967593 Jan 17 15:20 passwd > Wed Jan 17 15:38:26 EST 2001 > # ls -li passwd ; date > ls: passwd not found > Wed Jan 17 15:38:27 EST 2001 > # ls -li passwd ; date > 63444 -rw-r--r-- 1 root system 967593 Jan 17 15:20 passwd > Wed Jan 17 15:38:28 EST 2001 > # ls -li passwd ; date > ls: passwd not found > Wed Jan 17 15:38:28 EST 2001 > # ls -li passwd ; date > ls: passwd not found > Wed Jan 17 15:38:29 EST 2001 > # ls -li passwd ; date > 63444 -rw-r--r-- 1 root system 967593 Jan 17 15:20 > passwd > > This makes the problem go away. For awhile anyway. > > # mv passwd p > # cp p passwd > # > # > # ls -li passwd ; date > 88967 -rw-r--r-- 1 root system 967593 Jan 17 15:38 passwd > Wed Jan 17 15:38:55 EST 2001 > # ls -li passwd ; date > 88967 -rw-r--r-- 1 root system 967593 Jan 17 15:38 passwd > Wed Jan 17 15:38:56 EST 2001 > etc. > > This is on Tru64 on a DS20. OS bug? Filesystem corruption? Any ideas > for further diagnositic work? > > -Ron- - Subcription/unsubscription/info requests: send e-mail with "subscribe", "unsubscribe", or "info" on the first line of the message body to discuss-request at blu.org (Subject line is ignored).
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