diff --git a/generate-linuxcnc-switchkins-remap-table.sh b/generate-linuxcnc-switchkins-remap-table.sh
index 130511f..394e6fc 100755
--- a/generate-linuxcnc-switchkins-remap-table.sh
+++ b/generate-linuxcnc-switchkins-remap-table.sh
@@ -71,6 +71,9 @@ fi
 
 linuxcnc_root=$(cd "$linuxcnc_root" && pwd)
 
+# LinuxCNC source basis: src/hal/utils/halcmd_commands.cc do_loadusr_cmd()
+# parses loadusr options with getopt("+wWin:"), and
+# src/hal/utils/halcmd_completion.c lists the common -W/-Wn/-w/-iw forms.
 read_ini_switchkins_config() {
     local file=$1
     awk '
@@ -79,6 +82,31 @@ read_ini_switchkins_config() {
             sub(/[[:space:]]*$/, "", value)
             return value
         }
+        function loadusr_program(value, fields, field_count, i, token) {
+            sub(/^.*(^|[[:space:]])loadusr[[:space:]]+/, "", value)
+            field_count = split(value, fields, /[[:space:]]+/)
+            for (i = 1; i <= field_count; i++) {
+                token = fields[i]
+                if (token == "-W" || token == "-w" || token == "-i") {
+                    continue
+                }
+                if (token == "-Wn" || token == "-n") {
+                    i++
+                    continue
+                }
+                if (token ~ /^-Wn.+/ || token ~ /^-n.+/) {
+                    continue
+                }
+                if (token ~ /^-[wWi]+$/) {
+                    continue
+                }
+                if (token ~ /^-/) {
+                    continue
+                }
+                return token
+            }
+            return ""
+        }
         {
             line = $0
             sub(/[[:space:]]*[#;].*$/, "", line)
@@ -108,12 +136,7 @@ read_ini_switchkins_config() {
             } else if (section == "hal" && key == "halcmd") {
                 lower = tolower(value)
                 if (lower ~ /(^|[[:space:]])loadusr([[:space:]]|$)/) {
-                    command = value
-                    sub(/^.*(^|[[:space:]])loadusr[[:space:]]+/, "", command)
-                    while (command ~ /^-[^[:space:]]+[[:space:]]+/) {
-                        sub(/^-[^[:space:]]+[[:space:]]+/, "", command)
-                    }
-                    sub(/[[:space:]].*$/, "", command)
+                    command = loadusr_program(value)
                     if (command != "") {
                         print "halcmd_loadusr\t" command
                     }
@@ -167,6 +190,31 @@ read_loadusr_commands() {
             sub(/[[:space:]]*$/, "", value)
             return value
         }
+        function loadusr_program(value, fields, field_count, i, token) {
+            sub(/^.*(^|[[:space:]])loadusr[[:space:]]+/, "", value)
+            field_count = split(value, fields, /[[:space:]]+/)
+            for (i = 1; i <= field_count; i++) {
+                token = fields[i]
+                if (token == "-W" || token == "-w" || token == "-i") {
+                    continue
+                }
+                if (token == "-Wn" || token == "-n") {
+                    i++
+                    continue
+                }
+                if (token ~ /^-Wn.+/ || token ~ /^-n.+/) {
+                    continue
+                }
+                if (token ~ /^-[wWi]+$/) {
+                    continue
+                }
+                if (token ~ /^-/) {
+                    continue
+                }
+                return token
+            }
+            return ""
+        }
         {
             line = $0
             sub(/[[:space:]]*#.*/, "", line)
@@ -175,13 +223,9 @@ read_loadusr_commands() {
             if (lower !~ /(^|[[:space:]])loadusr([[:space:]]|$)/) {
                 next
             }
-            sub(/^.*(^|[[:space:]])loadusr[[:space:]]+/, "", line)
-            while (line ~ /^-[^[:space:]]+[[:space:]]+/) {
-                sub(/^-[^[:space:]]+[[:space:]]+/, "", line)
-            }
-            sub(/[[:space:]].*$/, "", line)
-            if (line != "") {
-                print line
+            command = loadusr_program(line)
+            if (command != "") {
+                print command
             }
         }
     ' "$file"