fileutil::traverse , a tcllib module, provides utilities for traversing directory hierarchies.


hv: While traversing down a directory, there are times when you encounter one that is not accessible. While the documentation stated that the package will ignore those directories by default. In reality, my sample script crashed. Curious, I dug into the source code and found what might be a bug. I posted the problem and a work-around solution on StackOverflow

To sum up, I used the -prefilter option to determine if a directory is readbale:

package require fileutil::traverse

proc isAccessible {absPath} {
    return [file readable $absPath]

# Main
set searchDir /tmp
fileutil::traverse t $searchDir -prefilter isAccessible

puts "\nFiles in $searchDir:"
t foreach fileName {
    puts $fileName

Mho 2020-10-12: Just tried fileutil::traverse T c:/users on my windows machine.

After ~800k files I got this:

could not read link "c:/users/matthiasu/AppData/Local/Packages/Microsoft.Microsoft3DViewer_8wekyb3d8bbwe/LocalCache": invalid argument

Experimenting again later. Calling with an invalid (non existent) folder: the foldername itself is returned. Neither -prefilter nor -errorcmd triggered.