TCL:遍历文件夹并返回文件名称

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#proc tcl_dir : show all file in current path
#parameter 
#　　　　 path : the path you want to look
#       flag :     
#                1--only show curent path file list
#                2--show curent path file list include path
#                3--show curent path file list with its subdirectory
#                4--show curent path file list with its subdirectory include path
#        result : result will be setted "" and return new result
#        eg:
#            return [tcl_dir [file dirname [info script]] 1 {}]
#author : li
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proc tcl_dir {path flag result} {
#    puts "\'[pwd]\'"
    if {"NULL"!=$path && ""!=$path} {
        #catach excption or error
        if {[catch {cd $path} err]} {
            return $err
        }
        set path {}
    }
    foreach fileList [glob -nocomplain *] {
#        switch $flag {a {} b {}}
        switch $flag { \
                    1 {
                        puts $fileList
                        lappend result $fileList
                      } \
                    2 {
                        if {[file isdirectory $fileList]} {
                            #add subdirectory's result to variable result
                            lappend result [tcl_dir $fileList $flag {}]
                            cd ..
                        }
                        puts $fileList
                        lappend result $fileList
                      } \
                    3 {
                        puts [file join [pwd] $fileList]
                        lappend result [file join [pwd] $fileList]
                    } \
                    4 {
                        if {[file isdirectory $fileList]} {
                            lappend result "[tcl_dir $fileList $flag {}]"
                            cd ..
                        }
                        puts [file join [pwd] $fileList]
                        lappend result [file join [pwd] $fileList]
                    } \
        }
    }
        return $result
}