diff --git a/contrib/autostyle.lua b/contrib/autostyle.lua
index 319b8f3..336e6f7 100644
--- a/contrib/autostyle.lua
+++ b/contrib/autostyle.lua
@@ -69,7 +69,7 @@ script_data.show = nil -- only required for libs since the destroy_method only h
 -- run command and retrieve stdout
 local function get_stdout(cmd)
   -- Open the command, for reading
-  local fd = assert(syslib.io_popen(cmd, 'r'))
+  local fd = assert(io.popen(cmd, 'r'))
   darktable.control.read(fd)
   -- slurp the whole file
   local data = assert(fd:read('*a'))
@@ -188,4 +188,4 @@ darktable.register_event("autostyle", "post-import-image",
 
 
 script_data.destroy = destroy
-return script_data
\ No newline at end of file
+return script_data
diff --git a/contrib/color_profile_manager.lua b/contrib/color_profile_manager.lua
index d87d9a6..52fc38c 100644
--- a/contrib/color_profile_manager.lua
+++ b/contrib/color_profile_manager.lua
@@ -107,7 +107,7 @@ end
 
 local function list_profiles(dir)
   local files = {}
-  local p = dtsys.io_popen(DIR_CMD .. " " .. dir)
+  local p = io.popen(DIR_CMD .. " " .. dir)
   if p then
     for line in p:lines() do
       table.insert(files, line)
diff --git a/contrib/fujifilm_dynamic_range.lua b/contrib/fujifilm_dynamic_range.lua
index ad7b2bb..6116d35 100644
--- a/contrib/fujifilm_dynamic_range.lua
+++ b/contrib/fujifilm_dynamic_range.lua
@@ -106,7 +106,7 @@ local function detect_dynamic_range(event, image)
 	-- without -n flag, exiftool will round to the nearest tenth
 	command = command .. " -RawExposureBias -n -t " .. RAF_filename
 	dt.print_log(command)
-	output = dtsys.io_popen(command)
+	output = io.popen(command)
 	local raf_result = output:read("*all")
 	output:close()
 	if #raf_result == 0 then
diff --git a/contrib/fujifilm_ratings.lua b/contrib/fujifilm_ratings.lua
index b2f11fe..049e3c2 100644
--- a/contrib/fujifilm_ratings.lua
+++ b/contrib/fujifilm_ratings.lua
@@ -65,7 +65,7 @@ local function detect_rating(event, image)
 	local JPEG_filename = string.gsub(RAF_filename, "%.RAF$", ".JPG")
 	local command = "exiftool -Rating " .. JPEG_filename
 	dt.print_log(command)
-	local output = dtsys.io_popen(command)
+	local output = io.popen(command)
 	local jpeg_result = output:read("*all")
 	output:close()
 	if string.len(jpeg_result) > 0 then
@@ -76,7 +76,7 @@ local function detect_rating(event, image)
 	end
 	command = "exiftool -Rating " .. RAF_filename
 	dt.print_log(command)
-	output = dtsys.io_popen(command)
+	output = io.popen(command)
 	local raf_result = output:read("*all")
 	output:close()
 	if string.len(raf_result) > 0 then
diff --git a/contrib/geoJSON_export.lua b/contrib/geoJSON_export.lua
index 406c37c..2ff3080 100644
--- a/contrib/geoJSON_export.lua
+++ b/contrib/geoJSON_export.lua
@@ -331,7 +331,7 @@ dt.preferences.register("geoJSON_export",
 	_("opens the geoJSON file after the export with the standard program for geoJSON files"),
 	false )
 
-local handle = dtsys.io_popen("xdg-user-dir DESKTOP")
+local handle = io.popen("xdg-user-dir DESKTOP")
 local result = handle:read()
 handle:close()
 if (result == nil) then
diff --git a/contrib/geoToolbox.lua b/contrib/geoToolbox.lua
index d654eeb..68fdc3c 100644
--- a/contrib/geoToolbox.lua
+++ b/contrib/geoToolbox.lua
@@ -412,7 +412,7 @@ local function reverse_geocode()
     -- jq could be replaced with a Lua JSON parser
     startCommand = string.format("curl --silent \"https://api.mapbox.com/geocoding/v5/mapbox.places/%s,%s.json?types=%s&access_token=%s\" | jq '.features | .[0] | '.text''", lon1, lat1, types, tokan)
 
-    local handle = dtsys.io_popen(startCommand)
+    local handle = io.popen(startCommand)
     local result = trim12(handle:read("*a"))
     handle:close()
     
diff --git a/contrib/image_stack.lua b/contrib/image_stack.lua
index ba0909b..c63ff16 100644
--- a/contrib/image_stack.lua
+++ b/contrib/image_stack.lua
@@ -348,7 +348,7 @@ local function list_files(search_string)
     search_string = string.gsub(search_string, "/", "\\\\")
   end
 
-  local f = dtsys.io_popen(ls .. search_string)
+  local f = io.popen(ls .. search_string)
   if f then
     local found_file = f:read()
     while found_file do 
diff --git a/contrib/image_time.lua b/contrib/image_time.lua
index fa00b57..a35f751 100644
--- a/contrib/image_time.lua
+++ b/contrib/image_time.lua
@@ -226,7 +226,7 @@ local function get_image_taken_time(image)
 
   local exiv2 = df.check_if_bin_exists("exiv2")
   if exiv2 then
-    p = dtsys.io_popen(exiv2 .. " -K Exif.Image.DateTime " .. image.path .. PS .. image.filename)
+    p = io.popen(exiv2 .. " -K Exif.Image.DateTime " .. image.path .. PS .. image.filename)
     if p then
       for line in p:lines() do
         if string.match(line, "Exif.Image.DateTime") then
@@ -244,7 +244,7 @@ end
 
 local function _get_windows_image_file_creation_time(image)
   local datetime = nil
-  local p = dtsys.io_popen("dir " .. image.path .. PS .. image.filename)
+  local p = io.popen("dir " .. image.path .. PS .. image.filename)
   if p then
     for line in p:lines() do
       if string.match(line, ds.sanitize_lua(image.filename)) then
@@ -265,7 +265,7 @@ end
 
 local function _get_nix_image_file_creation_time(image)
   local datetime = nil
-  local p = dtsys.io_popen("ls -lL --time-style=full-iso " .. image.path .. PS .. image.filename)
+  local p = io.popen("ls -lL --time-style=full-iso " .. image.path .. PS .. image.filename)
   if p then
     for line in p:lines() do
       if string.match(line, ds.sanitize_lua(image.filename)) then
diff --git a/contrib/kml_export.lua b/contrib/kml_export.lua
index ec7218c..ec1aa04 100644
--- a/contrib/kml_export.lua
+++ b/contrib/kml_export.lua
@@ -343,7 +343,7 @@ if dt.configuration.running_os == "windows" then
 elseif dt.configuration.running_os == "macos" then
   defaultDir =  os.getenv("HOME")
 else
-  local handle = dsys.io_popen("xdg-user-dir DESKTOP")
+  local handle = io.popen("xdg-user-dir DESKTOP")
   defaultDir = handle:read()
   handle:close()
 end
diff --git a/lib/dtutils/file.lua b/lib/dtutils/file.lua
index b871711..cd898e7 100644
--- a/lib/dtutils/file.lua
+++ b/lib/dtutils/file.lua
@@ -42,7 +42,7 @@ end
 
 local function _win_os_execute(cmd)
   local result = nil
-  local p = dsys.io_popen(cmd)
+  local p = io.popen(cmd)
   local output = p:read("*a")
   p:close()
   if string.match(output, "true") then 
@@ -94,7 +94,7 @@ dtutils_file.libdoc.functions["test_file"] = {
 
 function dtutils_file.test_file(path, test)
   local cmd = "test -"
-  local engine = dsys.os_execute
+  local engine = os.execute
   local cmdstring = ""
 
   if dt.configuration.running_os == "windows" then
@@ -167,7 +167,7 @@ local function _search_for_bin_windows(bin)
 
   for _,arg in ipairs(args) do
     local cmd = "where " .. arg .. " " .. ds.sanitize(bin)
-    local p = dsys.io_popen(cmd)
+    local p = io.popen(cmd)
     local output = p:read("*a")
     p:close()
     local lines = du.split(output, "\n")
@@ -191,7 +191,7 @@ end
 
 local function _search_for_bin_nix(bin)
   local result = false
-  local p = dsys.io_popen("command -v " .. bin)
+  local p = io.popen("command -v " .. bin)
   local output = p:read("*a")
   p:close()
   if string.len(output) > 0 then
@@ -220,7 +220,7 @@ local function _search_for_bin_macos(bin)
       search_start = "/Applications/" .. bin .. ".app"
     end
 
-    local p = dsys.io_popen("find " .. search_start .. " -type f -name " .. bin .. " -print")
+    local p = io.popen("find " .. search_start .. " -type f -name " .. bin .. " -print")
     local output = p:read("*a")
     p:close()
     local lines = du.split(output, "\n")
@@ -445,7 +445,7 @@ function dtutils_file.check_if_file_exists(filepath)
   local result = false
   if (dt.configuration.running_os == 'windows') then
     filepath = string.gsub(filepath, '[\\/]+', '\\')
-    local p = dsys.io_popen("if exist " .. dtutils_file.sanitize_filename(filepath) .. " (echo 'yes') else (echo 'no')")
+    local p = io.popen("if exist " .. dtutils_file.sanitize_filename(filepath) .. " (echo 'yes') else (echo 'no')")
     local ans = p:read("*all")
     p:close()
     if string.match(ans, "yes") then
@@ -456,7 +456,7 @@ function dtutils_file.check_if_file_exists(filepath)
 --     result = false
 --    end
   elseif (dt.configuration.running_os == "linux") then
-    result = dsys.os_execute('test -e ' .. dtutils_file.sanitize_filename(filepath))
+    result = os.execute('test -e ' .. dtutils_file.sanitize_filename(filepath))
     if not result then
       result = false
     end
@@ -522,9 +522,9 @@ function dtutils_file.file_copy(fromFile, toFile)
   local result = nil
   -- if cp exists, use it
   if dt.configuration.running_os == "windows" then
-    result = dsys.os_execute('copy "' .. fromFile .. '" "' .. toFile .. '"')
+    result = os.execute('copy "' .. fromFile .. '" "' .. toFile .. '"')
   elseif dtutils_file.check_if_bin_exists("cp") then
-    result = dsys.os_execute("cp '" .. fromFile .. "' '" .. toFile .. "'")
+    result = os.execute("cp '" .. fromFile .. "' '" .. toFile .. "'")
   end
 
   -- if cp was not present, or if cp failed, then a pure lua solution
@@ -575,7 +575,7 @@ function dtutils_file.file_move(fromFile, toFile)
   if not success then
     -- an error occurred, so let's try using the operating system function
     if dtutils_file.check_if_bin_exists("mv") then
-      success = dsys.os_execute("mv '" .. fromFile .. "' '" .. toFile .. "'")
+      success = os.execute("mv '" .. fromFile .. "' '" .. toFile .. "'")
     end
     -- if the mv didn't exist or succeed, then...
     if not success then
diff --git a/lib/dtutils/string.lua b/lib/dtutils/string.lua
index 926c667..d64a95a 100644
--- a/lib/dtutils/string.lua
+++ b/lib/dtutils/string.lua
@@ -298,16 +298,32 @@ local function _sanitize_windows(str)
   end
 end
 
+local function _should_be_sanitized(str)
+  local old_log_level = log.log_level()
+  local result = false
+  log.log_level(dtutils_string.log_level)
+  if string.match(str, "[^%g]") then
+    result =  true
+  end
+  log.log_level(old_log_level)
+  return result
+end
+
 function dtutils_string.sanitize(str)
   local old_log_level = log.log_level()
+  local sanitized_str = nil
   log.log_level(dtutils_string.log_level)
-  if dt.configuration.running_os == "windows" then
-    log.log_level(old_log_level)
-    return _sanitize_windows(str)
+  if _should_be_sanitized(str) then
+    if dt.configuration.running_os == "windows" then
+      sanitized_str = _sanitize_windows(str)
+    else
+      sanitized_str = _sanitize_posix(str)
+    end
   else
-    log.log_level(old_log_level)
-    return _sanitize_posix(str)
+    sanitized_str = str
   end
+  log.log_level(old_log_level)
+  return sanitized_str
 end
 
 dtutils_string.libdoc.functions["sanitize_lua"] = {
diff --git a/lib/dtutils/system.lua b/lib/dtutils/system.lua
index 5326018..2ec2c31 100644
--- a/lib/dtutils/system.lua
+++ b/lib/dtutils/system.lua
@@ -51,7 +51,7 @@ function dtutils_system.external_command(command)
   local result = nil
 
   if dt.configuration.running_os == "windows" then
-    result = dtutils_system.windows_command(ds.sanitize(command))
+    result = dtutils_system.windows_command(command)
   else
     result = dt.control.execute(command)
   end
@@ -78,20 +78,20 @@ dtutils_system.libdoc.functions["windows_command"] = {
   Copyright = [[]],
 }
 
-local function quote_windows_command(command)
+local function _quote_windows_command(command)
   return "\"" .. command .. "\""
 end
 
 function dtutils_system.windows_command(command)
   local result = 1
 
-  local fname = ds.sanitize(dt.configuration.tmp_dir .. "/run_command.bat")
+  local fname = dt.configuration.tmp_dir .. "/run_command.bat"
 
   local file = io.open(fname, "w")
   if file then
     dt.print_log("opened file")
     command = string.gsub(command, "%%", "%%%%") -- escape % from windows shell
-    command = quote_windows_command(command)
+    command = _quote_windows_command(command)
     file:write(command)
     file:close()
 
@@ -124,6 +124,7 @@ dtutils_system.libdoc.functions["launch_default_app"] = {
   License = [[]],
   Copyright = [[]],
 }
+
 function dtutils_system.launch_default_app(path) 
   local open_cmd = "xdg-open "
   if (dt.configuration.running_os == "windows") then
@@ -134,56 +135,4 @@ function dtutils_system.launch_default_app(path)
   return dtutils_system.external_command(open_cmd .. path)
 end
 
-
-dtutils_system.libdoc.functions["os_execute"] = {
-  Name = [[os_execute]],
-  Synopsis = [[wrapper around the lua os.execute function]],
-  Usage = [[local dsys = require "lib/dtutils.file"
-
-    result = dsys.os_execute(cmd)
-      cmd - string - a command to execute on the operating system]],
-  Description = [[os_execute wraps the lua os.execute system call to provide
-    correct sanitization of windows commands]],
-  Return_Value = [[see the lua os.execute documentation]],
-  Limitations = [[]],
-  Example = [[]],
-  See_Also = [[]],
-  Reference = [[]],
-  License = [[]],
-  Copyright = [[]],
-}
-
-function dtutils_system.os_execute(cmd)
-  if dt.configuration.running_os == "windows" then
-    cmd = quote_windows_command(cmd)
-  end
-  return os.execute(cmd)
-end
-
-dtutils_system.libdoc.functions["io_popen"] = {
-  Name = [[io_popen]],
-  Synopsis = [[wrapper around the lua io.popen function]],
-  Usage = [[local dsys = require "lib/dtutils.file"
-
-    result = dsys.io_popen(cmd)
-      cmd - string - a command to execute and attach to]],
-  Description = [[io_popen wraps the lua io.popen system call to provide
-    correct sanitization of windows commands]],
-  Return_Value = [[see the lua io.popen documentation]],
-  Limitations = [[]],
-  Example = [[]],
-  See_Also = [[]],
-  Reference = [[]],
-  License = [[]],
-  Copyright = [[]],
-}
-
-function dtutils_system.io_popen(cmd)
-  if dt.configuration.running_os == "windows" then
-    cmd = quote_windows_command(cmd)
-  end
-  return io.popen(cmd)
-end
-
-
 return dtutils_system
diff --git a/official/enfuse.lua b/official/enfuse.lua
index c193c35..c8df51b 100644
--- a/official/enfuse.lua
+++ b/official/enfuse.lua
@@ -116,7 +116,7 @@ if enfuse_installed then
 
   local version = nil
 
-  local p = dtsys.io_popen(enfuse_installed .. " --version")
+  local p = io.popen(enfuse_installed .. " --version")
   local f = p:read("all")
   p:close()
   version = string.match(f, "enfuse (%d.%d)")
diff --git a/tools/executable_manager.lua b/tools/executable_manager.lua
index 0e28668..ffdf532 100644
--- a/tools/executable_manager.lua
+++ b/tools/executable_manager.lua
@@ -76,7 +76,7 @@ local function grep(file, pattern)
   if dt.configuration.running_os == "windows" then
     -- use find to get the matches
     local command = "\\windows\\system32\\find.exe " .. "\"" .. pattern .. "\"" .. " " .. file
-    local f = dtsys.io_popen(command)
+    local f = io.popen(command)
     local output = f:read("all")
     f:close()
     -- strip out the first line
@@ -85,7 +85,7 @@ local function grep(file, pattern)
   else
     -- use grep and just return the answers
     local command = "grep " .. pattern .. " " .. file
-    local f = dtsys.io_popen(command)
+    local f = io.popen(command)
     local output = f:read("all")
     f:close()
     result = du.split(output, "\n")
diff --git a/tools/get_lib_manpages.lua b/tools/get_lib_manpages.lua
index 91d5dbb..a5a7ab9 100644
--- a/tools/get_lib_manpages.lua
+++ b/tools/get_lib_manpages.lua
@@ -46,7 +46,7 @@ local function output_man(d)
     mf:close()
     if df.check_if_bin_exists("groff") then
       if df.check_if_bin_exists("ps2pdf") then
-        dtsys.os_execute("groff -man " .. fname .. " | ps2pdf - " .. fname .. ".pdf")
+        os.execute("groff -man " .. fname .. " | ps2pdf - " .. fname .. ".pdf")
       else
         log.msg(log.error, "Missing ps2pdf.  Can't generate pdf man pages.")
       end
@@ -60,7 +60,7 @@ end
 
 -- find the libraries
 
-local output = dtsys.io_popen("cd "..dt.configuration.config_dir.."/lua/lib ;find . -name \\*.lua -print | sort")
+local output = io.popen("cd "..dt.configuration.config_dir.."/lua/lib ;find . -name \\*.lua -print | sort")
 
 -- loop through the libraries
 
diff --git a/tools/get_libdoc.lua b/tools/get_libdoc.lua
index 2328014..3749a68 100644
--- a/tools/get_libdoc.lua
+++ b/tools/get_libdoc.lua
@@ -37,7 +37,7 @@ end
 
 -- find the libraries
 
-local output = dtsys.io_popen("cd "..dt.configuration.config_dir.."/lua/lib ;find . -name \\*.lua -print | sort")
+local output = io.popen("cd "..dt.configuration.config_dir.."/lua/lib ;find . -name \\*.lua -print | sort")
 
 -- loop through the libraries
 
diff --git a/tools/script_manager.lua b/tools/script_manager.lua
index 40a6962..b39f9e4 100644
--- a/tools/script_manager.lua
+++ b/tools/script_manager.lua
@@ -89,7 +89,7 @@ local MIN_BUTTONS_PER_PAGE <const> = 5
 local MAX_BUTTONS_PER_PAGE <const> = 20
 local DEFAULT_BUTTONS_PER_PAGE <const> = 10
 
-local DEFAULT_LOG_LEVEL <const> = log.error
+local DEFAULT_LOG_LEVEL <const> = log.debug
 
 local LUA_DIR <const> = dt.configuration.config_dir .. PS .. "lua"
 local LUA_SCRIPT_REPO <const> = "https://github.com/darktable-org/lua-scripts.git"
@@ -244,7 +244,7 @@ end
 local function get_repo_status(repo)
   local old_log_level = set_log_level(sm.log_level)
 
-  local p = dtsys.io_popen("cd " .. repo .. CS .. "git status")
+  local p = io.popen("cd " .. repo .. CS .. "git status")
 
   if p then
     local data = p:read("*a")
@@ -262,7 +262,7 @@ local function get_current_repo_branch(repo)
 
   local branch = nil
 
-  local p = dtsys.io_popen("cd " .. repo .. CS .. "git branch --all")
+  local p = io.popen("cd " .. repo .. CS .. "git branch --all")
 
   if p then
     local data = p:read("*a")
@@ -292,7 +292,7 @@ local function get_repo_branches(repo)
   local old_log_level = set_log_level(sm.log_level)
 
   local branches = {}
-  local p = dtsys.io_popen("cd " .. repo .. CS .. "git pull --all" .. CS .. "git branch --all")
+  local p = io.popen("cd " .. repo .. CS .. "git pull --all" .. CS .. "git branch --all")
 
   if p then
     local data = p:read("*a")
@@ -332,7 +332,7 @@ local function checkout_repo_branch(repo, branch)
 
   log.msg(log.info, "checkout out branch " .. branch .. " from repository " .. repo)
 
-  dtsys.os_execute("cd " .. repo .. CS .. "git checkout " .. branch)
+  os.execute("cd " .. repo .. CS .. "git checkout " .. branch)
 
   restore_log_level(old_log_level)
 end
@@ -668,7 +668,7 @@ local function scan_scripts(script_dir)
   log.msg(log.debug, "find command is " .. find_cmd)
 
   -- scan the scripts
-  local output = dtsys.io_popen(find_cmd)
+  local output = io.popen(find_cmd)
   for line in output:lines() do
     log.msg(log.debug, "line is " .. line)
     local l = string.gsub(line, ds.sanitize_lua(LUA_DIR) .. PS, "")   -- strip the lua dir off
@@ -754,7 +754,7 @@ local function scan_repositories()
 
   log.msg(log.debug, "find command is " .. find_cmd)
 
-  local output = dtsys.io_popen(find_cmd)
+  local output = io.popen(find_cmd)
 
   for line in output:lines() do
     local l = string.gsub(line, ds.sanitize_lua(LUA_DIR) .. PS, "")   -- strip the lua dir off