103 lines
2.7 KiB
Bash
103 lines
2.7 KiB
Bash
#!/usr/bin/env zsh
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# ============================================================================
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# MOTD — Width-Safe, Color-Safe, Reload-Safe
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# ============================================================================
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# ---------------------------- Guards -----------------------------------------
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[[ -o interactive ]] || return
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[[ -n $__MOTD_SHOWN ]] && return
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typeset -g __MOTD_SHOWN=1
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# ---------------------------- Configuration ----------------------------------
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BOX_WIDTH=78 # total width INCLUDING borders
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INNER_WIDTH=$(( BOX_WIDTH - 2 ))
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LABEL_WIDTH=12
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# ---------------------------- Colors -----------------------------------------
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autoload -Uz colors && colors
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C_DIM="%F{242}"
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C_HEAD="%B%F{39}"
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C_LABEL="%F{51}"
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C_OK="%F{82}"
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C_RESET="%f%b"
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# ---------------------------- Low-level helpers ------------------------------
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repeat_char() {
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local ch="$1" n="$2"
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printf '%*s' "$n" '' | tr ' ' "$ch"
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}
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pad_right() {
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local s="$1" w="$2"
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printf '%-*s' "$w" "$s"
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}
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center_text() {
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local s="$1" w="$2"
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local len=${#s}
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(( len >= w )) && { print "${s[1,w]}"; return }
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local pad=$(( (w - len) / 2 ))
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printf '%*s%s%*s' "$pad" '' "$s" "$(( w - len - pad ))" ''
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}
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# ---------------------------- Box primitives ---------------------------------
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box_top() {
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print "${C_DIM}┌$(repeat_char '─' $INNER_WIDTH)┐${C_RESET}"
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}
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box_bottom() {
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print "${C_DIM}└$(repeat_char '─' $INNER_WIDTH)┘${C_RESET}"
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}
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box_blank() {
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print "${C_DIM}│$(repeat_char ' ' $INNER_WIDTH)│${C_RESET}"
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}
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box_line() {
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local content="$1"
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content="$(pad_right "$content" "$INNER_WIDTH")"
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print "${C_DIM}│${C_RESET}${content}${C_DIM}│${C_RESET}"
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}
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# ---------------------------- Content builders -------------------------------
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header_line() {
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local text="$1"
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box_line "$(center_text "$text" "$INNER_WIDTH")"
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}
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row_line() {
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local label="$1" value="$2"
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local left="$(pad_right "$label" "$LABEL_WIDTH")"
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box_line " ${left} ${value}"
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}
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# ---------------------------- Info providers ---------------------------------
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get_os() { uname -sr }
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get_uptime() { uptime | sed 's/.*up *//' | cut -d',' -f1 }
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get_load() { uptime | awk -F'load average:' '{print $2}' | xargs }
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get_mem() { free -h | awk '/Mem:/ {print $3 "/" $2}' }
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get_disk() { df -h / | awk 'NR==2 {print $3 "/" $2 " (" $5 ")"}' }
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# ---------------------------- Render -----------------------------------------
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box_top
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header_line "${C_HEAD}$(hostname)${C_RESET} - ${C_DIM}$(get_os)${C_RESET}"
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box_blank
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row_line "${C_LABEL}Uptime${C_RESET}" "$(get_uptime)"
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row_line "${C_LABEL}Load${C_RESET}" "$(get_load)"
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row_line "${C_LABEL}Memory${C_RESET}" "$(get_mem)"
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row_line "${C_LABEL}Disk${C_RESET}" "$(get_disk)"
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box_blank
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box_line " ${C_OK}System up to date${C_RESET}"
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box_bottom
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print
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