Add net interface status to motd

[khome.git] / home / lib / login_functions.sh

diff --git a/home/lib/login_functions.sh b/home/lib/login_functions.sh
index 45460f4..29b00ee 100644 (file)
--- a/home/lib/login_functions.sh
+++ b/home/lib/login_functions.sh
@@ -364,3 +364,124 @@ run() {
     notify-send -u "$urgency" "Job done: $code" "$(cat $stderr)"
     rm "$stderr"
 }
+
+bar_gauge() {
+    local -r width="$1"
+
+    awk -v width="$width" '
+        {
+            used  = $1
+            total = $2
+
+            u = num_scale(used, total, 1, width)
+
+            printf "["
+            for (i=1; i<=width; i++) {
+                c = i <= u ? "|" : " "
+                printf "%c", c
+            }
+            printf "]\n"
+        }
+
+        function num_scale(src_cur, src_max, dst_min, dst_max) {
+            return dst_min + ((src_cur * (dst_max - dst_min)) / src_max)
+        }
+    '
+}
+
+motd() {
+    uname -srvmo
+    hostname | figlet
+    uptime
+
+    echo
+
+    printf 'mem  '
+    free \
+    | awk '$1 == "Mem:" {total=$2; used=$3; print used, total}' \
+    | bar_gauge 73
+
+    printf 'disk '
+    df ~ \
+    | awk 'NR == 2 {used=$3; avail=$4; total=used+avail; print used, total}' \
+    | bar_gauge 73
+
+    case "$(uname)" in
+        'Linux')
+            printf 'batt '
+            upower --dump \
+            | awk '
+                /^Device:[ \t]+/ {
+                    device["path"] = $2
+                    next
+                }
+
+                /  battery/ && device["path"] {
+                    device["is_battery"] = 1
+                    next
+                }
+
+                /    percentage:/ && device["is_battery"] {
+                    device["battery_percentage"] = $2
+                    sub("%$", "", device["battery_percentage"])
+                    next
+                }
+
+                /^$/ {
+                    if (device["is_battery"] && device["path"] == "/org/freedesktop/UPower/devices/DisplayDevice")
+                        print device["battery_percentage"], 100
+                    delete device
+                }
+            ' \
+            | bar_gauge 73
+        ;;
+    esac
+
+    echo
+
+    (ifconfig; iwconfig) 2> /dev/null \
+    | awk '
+        /^[^ ]/ {
+            device = $1
+            sub(":$", "", device)
+            if ($4 ~ "ESSID:") {
+                _essid = $4
+                sub("^ESSID:\"", "", _essid)
+                sub("\"$", "", _essid)
+                essid[device] = _essid
+            }
+            next
+        }
+
+        /^ / && $1 == "inet" {
+            address[device] = $2
+            next
+        }
+
+        /^ +Link Quality=[0-9]+\/[0-9]+ +Signal level=/ {
+            split($2, lq_parts_eq, "=")
+            split(lq_parts_eq[2], lq_parts_slash, "/")
+            cur = lq_parts_slash[1]
+            max = lq_parts_slash[2]
+            link[device] = cur / max * 100
+            next
+        }
+
+        END {
+            for (device in address)
+                if (device != "lo") {
+                    l = link[device]
+                    e = essid[device]
+                    l = l ? l : "--"
+                    e = e ? e : "--"
+                    print device, address[device], e, l
+                }
+        }
+        ' \
+    | column -t
+
+    #echo
+    # TODO: netstat summary
+    # WARN: ensure: $USER ALL=(ALL) NOPASSWD:/bin/netstat
+    #sudo -n netstat -tulpn | awk '/^udp/ && !first++ {printf "\n"} 1'
+}