func (c *ClientConn) walk(fc *plan9.Fcall) *plan9.Fcall {
fc.Type = plan9.Rwalk
fref, has := c.fidRef(fc.Fid)
if !has {
return c.invalidFidErr(fc)
}
if _, has := c.fidRef(fc.Newfid); has {
return c.fidUsedErr(fc)
}
current := fref.Path
for idx, name := range fc.Wname {
var ft FileType
if current == 0 {
return c.fileNotFoundErr(fc)
}
if ff, ok := c.explorer.(FileFinder); ok {
f, err := ff.FindInDir(current, name)
if err != nil {
return c.unexpectedErr(fc, err)
}
current = f.Path
} else {
childs, err := c.explorer.ListDir(current)
if err != nil {
return c.unexpectedErr(fc, err)
}
idx, have := childs.FindExact(name)
if !have {
return c.fileNotFoundErr(fc)
}
current = childs[idx].Path
}
ref, err := c.createFileRef(current, ft, 0)
if err != nil {
return c.unexpectedErr(fc, err)
}
fc.Wqid = append(fc.Wqid, ref.Qid)
// if the last match isn't a directory, there is no need to find
// another part of the path
//
// so, just break here
if ft == FTFILE && idx != len(fc.Wname)-1 {
return c.fileNotFoundErr(fc)
}
}
if len(fc.Wqid) == 0 {
// newfid and fid will map to the same file
if fc.Newfid != fc.Fid {
c.bindFid(fc.Newfid, fref.Path)
}
} else {
// make a bind between the last qid and the new fid
c.bindFid(fc.Newfid, fc.Wqid[len(fc.Wqid)-1].Path)
}
return fc
}