Thank you very much
On Fri, Oct 28, 2022, 8:15 AM Marvin Renich <m...@renich.org> wrote:
> * Robert Solomon <drrob...@gmail.com> [221028 07:36]:
> > On ubuntu 22.04, I would like the walk function to NOT follow symlinks
> to
> > other filesystems. The find command uses the -xdev switch to achieve
> this.
> >
> > How can I get walk to behave like the -xdev switch to find?
>
> On Linux:
>
> ---- getdevid_linux.go
>
> package main
>
> import (
> "io/fs"
> "syscall"
> )
>
> type DevId uint64
>
> // GetDevice returns the Device ID on which the given file resides.
> func GetDevice(path string, fi fs.FileInfo) DevId {
> var stat = fi.Sys().(*syscall.Stat_t)
> return DevId(stat.Dev)
> }
>
> ----
>
> Then before calling filepath.Walk, filepath.WalkDir (more efficient), or
> fs.WalkDir, obtain the device ID of the root. In the call to WalkDir,
> pass this device ID to your walk function:
>
> err = filepath.WalkDir(root, func(path string, d fs.DirEntry, err
> error) error { return MyWalkFn(devId, path, d, err) })
>
> In MyWalkFn, use d to obtain the device ID of the current path, and
> return fs.SkipDir if the device IDs do not match.
>
> ...Marvin
>
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