fixed displayed value

profile.d/conf.sh

@@ -285,8 +285,9 @@ conf_dump()
 
             # Commented-out key=value — shown only with show_all.
             # The value displayed is the live environment value (what load_conf
-            # actually exported), not the commented-out text which may be an
-            # example or stale documentation.  Each key is shown at most once.
+            # actually exported); when the key is not set in the environment we
+            # fall back to the value written in the comment, i.e. the documented
+            # default.  Each key is shown at most once.
             if (show_all && $0 ~ /^[[:space:]]*#[[:space:]]*[A-Za-z_][A-Za-z0-9_]*[[:space:]]*=/) {
                 line = $0; sub(/^[[:space:]]*#[[:space:]]*/, "", line)
                 key = line; sub(/[[:space:]]*=.*$/, "", key); sub(/^[[:space:]]*/, "", key)
@@ -294,6 +295,7 @@ conf_dump()
                 seen[current_sec ":" key] = 1
                 if (key_filter != "" && index(key, key_filter) == 0) next
                 val = ENVIRON[key]
+                if (val == "") { val = line; sub(/^[^=]*=[[:space:]]*/, "", val) }
                 if (!hdr_printed) {
                     if (found) print ""
                     print c_sec "[" current_sec "]" c_rst