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SubjectRe: access() says EROFS even for device files if /dev is mounted RO
On Wed, Nov 29, 2000 at 04:40:29PM +0000, Tigran Aivazian wrote:
> b) what should be the return of access(W_OK) (or, the same, open() for
> write with switched uid) for devices on a readonly-mounted filesystems?
> Should the majority win? I.e. should we say OK, as we do now?

My gut feeling on this is that when you mount a filesystem readonly
you mean "I don't want the filesystem to be modifiable". Opening a
device for write never modifies the filesystem directly. Devices are
gateways to resources external to the filesystem, the write permission
means something different for them.

Same is for sockets/pipes btw.

And I really wonder how you plan to fsck / if it has been uncleanly
unmounted and includes /dev.

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