Generate fan level ranges

thinkfan-confgen

@@ -5,25 +5,41 @@ set -o pipefail
 main() {
   if [[ -f "${1}" ]]; then
     exec 1>"${1}"
+    shift
   fi
 
-  printf "# thinkfan-confgen created %s\n" "$(date -u)"
+  : "${THINKFAN_LOWER_BOUND:=30}"
+  : "${THINKFAN_STEP:=4}"
+
+  printf '# thinkfan-confgen created %s\n' "$(date -u)"
+  printf '# THINKFAN_LOWER_BOUND=%s\n' "${THINKFAN_LOWER_BOUND}"
+  printf '# THINKFAN_STEP=%s\n\n' "${THINKFAN_STEP}"
 
   find /sys -type f -name 'temp*_input' | while read -r line; do
-    echo "hwmon ${line}"
+    printf 'hwmon %s\n' "${line}"
+  done
+
+  printf '\ntp_fan /proc/acpi/ibm/fan\n\n'
+
+  local halfstep="$((THINKFAN_STEP / 2))"
+  local cur="${THINKFAN_LOWER_BOUND}"
+
+  for level in 0 1 2 3 4 5 6 7; do
+    if [[ "${level}" == 0 ]]; then
+      printf '(0, 0, %s)\n' "${cur}"
+      continue
+    fi
+
+    if [[ "${level}" == 7 ]]; then
+      printf '(7, %s, 32767)\n' "$((cur - halfstep))"
+      continue
+    fi
+
+    printf '(%s, %s, %s)\n' \
+      "${level}" "$((cur - halfstep))" "$((cur + THINKFAN_STEP))"
+
+    cur="$((cur + THINKFAN_STEP))"
   done
-  cat <<'EOF'
-
-tp_fan /proc/acpi/ibm/fan
-
-(0, 0, 43)
-(1, 41, 46)
-(2, 44, 49)
-(3, 47, 52)
-(4, 50, 55)
-(5, 53, 58)
-(7, 56, 32767)
-EOF
 }
 
 main "${@}"