306 lines
10 KiB
Bash
306 lines
10 KiB
Bash
#!/usr/bin/env zsh
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# ============================================================================
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# MOTD (Message of the Day) - Dynamic System Info
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# ============================================================================
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# Displays system information on shell startup
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# Optimized for Arch/CachyOS with direct /proc access
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#
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# Functions:
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# show_motd - Compact box format
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# show_motd_mini - Single line format
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# show_motd_full - Extended info
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# ============================================================================
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# Only run in interactive shells
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[[ -o interactive ]] || return 0
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# Source shared colors (with fallback)
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source "${0:A:h}/../lib/colors.zsh" 2>/dev/null || \
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source "$HOME/.dotfiles/zsh/lib/colors.zsh" 2>/dev/null || {
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typeset -g DF_RESET=$'\033[0m' DF_BOLD=$'\033[1m' DF_DIM=$'\033[2m'
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typeset -g DF_BLUE=$'\033[38;5;39m' DF_CYAN=$'\033[38;5;51m'
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typeset -g DF_GREEN=$'\033[38;5;82m' DF_YELLOW=$'\033[38;5;220m'
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typeset -g DF_RED=$'\033[38;5;196m' DF_GREY=$'\033[38;5;242m' DF_NC=$'\033[0m'
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}
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# ============================================================================
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# MOTD Width
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# ============================================================================
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typeset -g _M_WIDTH=66
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# ============================================================================
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# Optimized Info Gathering (using /proc directly - faster than spawning processes)
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# ============================================================================
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# Uptime from /proc (no subprocess)
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_motd_uptime() {
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local uptime_seconds=$(cut -d. -f1 /proc/uptime 2>/dev/null)
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[[ -z "$uptime_seconds" ]] && { echo "?"; return; }
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local days=$((uptime_seconds / 86400))
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local hours=$(((uptime_seconds % 86400) / 3600))
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local mins=$(((uptime_seconds % 3600) / 60))
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if (( days > 0 )); then
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echo "${days}d${hours}h"
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elif (( hours > 0 )); then
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echo "${hours}h${mins}m"
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else
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echo "${mins}m"
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fi
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}
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# Load from /proc (no subprocess)
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_motd_load() {
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cut -d' ' -f1 /proc/loadavg 2>/dev/null || echo "?"
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}
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# Memory from /proc (single awk call)
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_motd_mem() {
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awk '/MemTotal/ {total=$2} /MemAvailable/ {avail=$2} END {
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if (total > 0) {
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used=(total-avail)/1024/1024
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total_gb=total/1024/1024
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printf "%.1fG/%.0fG", used, total_gb
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} else {
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print "N/A"
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}
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}' /proc/meminfo 2>/dev/null || echo "N/A"
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}
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# Disk usage (single df call)
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_motd_disk() {
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df -h / 2>/dev/null | awk 'NR==2 {print $3 "/" $2}' || echo "N/A"
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}
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# CPU governor (Arch-specific, direct file read)
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_motd_governor() {
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local gov=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor 2>/dev/null)
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[[ -n "$gov" ]] && echo "$gov"
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}
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# Kernel version (simplified)
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_motd_kernel() {
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local kernel=$(uname -r)
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# Strip architecture suffix for cleaner display
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echo "${kernel%%-*}"
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}
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# CachyOS scheduler detection
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_motd_scheduler() {
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if grep -q "cachyos" /proc/version 2>/dev/null; then
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if grep -q "bore" /proc/version 2>/dev/null; then
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echo "BORE"
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elif grep -q "eevdf" /proc/version 2>/dev/null; then
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echo "EEVDF"
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else
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echo "CachyOS"
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fi
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fi
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}
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# Failed systemd services count (cached)
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_motd_failed_services() {
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# Use cache to avoid slow systemctl calls on every prompt
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local cache_file="/tmp/.motd-failed-${UID}"
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local cache_age=300 # 5 minutes
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if [[ -f "$cache_file" ]]; then
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local file_age=$(($(date +%s) - $(stat -c %Y "$cache_file" 2>/dev/null || echo 0)))
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if (( file_age < cache_age )); then
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cat "$cache_file"
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return
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fi
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fi
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local count=$(systemctl --failed --no-pager --no-legend 2>/dev/null | wc -l)
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echo "$count" > "$cache_file" 2>/dev/null
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echo "$count"
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}
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# Package updates (from environment, set by aliases.zsh)
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_motd_updates() {
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echo "${UPDATE_PKG_COUNT:-0}"
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}
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# ============================================================================
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# Box Drawing - Fixed Width
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# ============================================================================
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_motd_line() {
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local char="$1"
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local line=""
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for ((i=0; i<_M_WIDTH; i++)); do line+="$char"; done
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echo "$line"
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}
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# ============================================================================
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# Main Display Function (Compact)
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# ============================================================================
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show_motd() {
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[[ -n "$_MOTD_SHOWN" && "$1" != "--force" ]] && return 0
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typeset -g _MOTD_SHOWN=1
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local hostname="${HOST:-$(hostname -s 2>/dev/null)}"
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local datetime=$(date '+%a %b %d %H:%M')
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local uptime=$(_motd_uptime)
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local load=$(_motd_load)
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local mem=$(_motd_mem)
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local disk=$(_motd_disk)
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local hline=$(_motd_line '═')
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local inner=$((_M_WIDTH - 2))
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echo ""
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# Top border
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echo "${DF_GREY}╒${hline}╕${DF_NC}"
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# Header: hostname + datetime
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local h_left="✦ ${hostname}"
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local h_center=$(hostname -i | awk -F" " '{print $1}')
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local h_right="${datetime}"
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local h_pad=$(((inner - ${#h_left} - ${#h_center} - ${#h_right}) / 2))
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local h_spaces=""
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for ((i=0; i<h_pad; i++)); do h_spaces+=" "; done
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if [ "$EUID" -ne 0 ];then
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echo "${DF_GREY}│${DF_NC} ${DF_BOLD}${DF_LIGHT_BLUE}${h_left}${DF_NC}${h_spaces}${DF_YELLOW}${h_center}${h_spaces}${DF_NC}${DF_BOLD}${h_right}${DF_NC} ${DF_GREY}│${DF_NC}"
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else
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echo "${DF_GREY}│${DF_NC} ${DF_BOLD}${DF_RED}${h_left}${DF_NC}${h_spaces}${DF_YELLOW}${h_center}${h_spaces}${DF_NC}${DF_BOLD}${h_right}${DF_NC} ${DF_GREY}│${DF_NC}"
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fi
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# Separator
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echo "${DF_GREY}╘${hline}╛${DF_NC}"
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# Stats line
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local s1="${DF_GREY}｢${DF_YELLOW}▲ ${DF_NC}${uptime}${DF_GREY}｣"
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local s2="${DF_GREY}｢${DF_CYAN}◆ ${DF_NC}${load}${DF_GREY}｣"
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local s3="${DF_GREY}｢${DF_GREEN}◇ ${DF_NC}${mem}${DF_GREY}｣"
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local s4="${DF_GREY}｢${DF_BLUE}⊡ ${DF_NC}${disk}${DF_GREY}｣"
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echo " ${s1}─${s2}─${s3}─${s4}"
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# Alerts line (if any issues)
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local alerts=""
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# Check for failed services
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local failed=$(_motd_failed_services)
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if (( failed > 0 )); then
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alerts+="${DF_RED}⚠ ${failed} failed service(s)${DF_NC} "
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fi
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# Check for updates
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local updates=$(_motd_updates)
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if (( updates > 0 )); then
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alerts+="${DF_YELLOW}⇑ ${updates} update(s)${DF_NC}"
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fi
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[[ -n "$alerts" ]] && echo " $alerts"
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#echo ""
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}
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# ============================================================================
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# Mini Format (Single Line)
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# ============================================================================
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show_motd_mini() {
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[[ -n "$_MOTD_SHOWN" && "$1" != "--force" ]] && return 0
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typeset -g _MOTD_SHOWN=1
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local hostname="${HOST:-$(hostname -s 2>/dev/null)}"
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local uptime=$(_motd_uptime)
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local mem=$(_motd_mem)
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local failed=$(_motd_failed_services)
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local alert=""
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(( failed > 0 )) && alert=" ${DF_RED}[${failed} failed]${DF_NC}"
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echo "${DF_DIM}──${DF_NC} ${DF_BOLD}${hostname}${DF_NC} ${DF_DIM}│${DF_NC} up:${uptime} ${DF_DIM}│${DF_NC} mem:${mem}${alert} ${DF_DIM}──${DF_NC}"
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}
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# ============================================================================
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# Full Format (Extended Info)
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# ============================================================================
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show_motd_full() {
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[[ -n "$_MOTD_SHOWN" && "$1" != "--force" ]] && return 0
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typeset -g _MOTD_SHOWN=1
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local hostname="${HOST:-$(hostname -s 2>/dev/null)}"
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local datetime=$(date '+%A, %B %d %Y %H:%M:%S')
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local uptime=$(_motd_uptime)
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local load=$(_motd_load)
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local mem=$(_motd_mem)
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local disk=$(_motd_disk)
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local kernel=$(_motd_kernel)
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local governor=$(_motd_governor)
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local scheduler=$(_motd_scheduler)
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local hline=$(_motd_line '═')
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# echo ""
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echo "${DF_GREY}╒${hline}╕${DF_NC}"
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echo "${DF_GREY}│${DF_NC} ${DF_BOLD}${DF_BLUE}✦ ${hostname}${DF_NC}"
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echo "${DF_GREY}│${DF_NC} ${DF_DIM}${datetime}${DF_NC}"
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echo "${DF_GREY}├$(_motd_line '─')┤${DF_NC}"
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# System info
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echo "${DF_GREY}│${DF_NC} ${DF_CYAN}Kernel:${DF_NC} ${kernel}"
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[[ -n "$scheduler" ]] && echo "${DF_GREY}│${DF_NC} ${DF_CYAN}Scheduler:${DF_NC} ${scheduler}"
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[[ -n "$governor" ]] && echo "${DF_GREY}│${DF_NC} ${DF_CYAN}Governor:${DF_NC} ${governor}"
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echo "${DF_GREY}├$(_motd_line '─')┤${DF_NC}"
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# Resources
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echo "${DF_GREY}│${DF_NC} ${DF_YELLOW}▲ Uptime:${DF_NC} ${uptime}"
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echo "${DF_GREY}│${DF_NC} ${DF_CYAN}◆ Load:${DF_NC} ${load}"
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echo "${DF_GREY}│${DF_NC} ${DF_GREEN}◇ Memory:${DF_NC} ${mem}"
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echo "${DF_GREY}│${DF_NC} ${DF_BLUE}⊡ Disk:${DF_NC} ${disk}"
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# Alerts section
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local failed=$(_motd_failed_services)
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local updates=$(_motd_updates)
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if (( failed > 0 || updates > 0 )); then
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echo "${DF_GREY}├$(_motd_line '─')┤${DF_NC}"
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(( failed > 0 )) && echo "${DF_GREY}│${DF_NC} ${DF_RED}⚠ ${failed} failed systemd service(s)${DF_NC}"
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(( updates > 0 )) && echo "${DF_GREY}│${DF_NC} ${DF_YELLOW}⇑ ${updates} package update(s) available${DF_NC}"
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fi
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echo "${DF_GREY}╘${hline}╛${DF_NC}"
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#echo ""
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}
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# ============================================================================
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# Aliases
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# ============================================================================
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alias motd='show_motd --force'
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alias motd-mini='show_motd_mini --force'
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alias motd-full='show_motd_full --force'
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# ============================================================================
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# Quick System Overview (callable anytime)
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# ============================================================================
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sysbrief() {
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echo -e "${DF_CYAN}Uptime:${DF_NC} $(_motd_uptime)"
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echo -e "${DF_CYAN}Load:${DF_NC} $(_motd_load)"
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echo -e "${DF_CYAN}Memory:${DF_NC} $(_motd_mem)"
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echo -e "${DF_CYAN}Disk:${DF_NC} $(_motd_disk)"
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local kernel=$(_motd_kernel)
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echo -e "${DF_CYAN}Kernel:${DF_NC} ${kernel}"
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local governor=$(_motd_governor)
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[[ -n "$governor" ]] && echo -e "${DF_CYAN}Governor:${DF_NC} ${governor}"
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local scheduler=$(_motd_scheduler)
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[[ -n "$scheduler" ]] && echo -e "${DF_CYAN}Scheduler:${DF_NC} ${scheduler}"
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local failed=$(_motd_failed_services)
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if (( failed > 0 )); then
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echo -e "${DF_RED}Failed:${DF_NC} ${failed} service(s)"
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fi
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}
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