195 lines
7.7 KiB
Bash
195 lines
7.7 KiB
Bash
#!/bin/bash
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# Postfix Mail Summary Script (Final Hardened & Portable Version)
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set -euo pipefail
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IFS=$'\n\t'
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# ==============================================================================
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# 1. HELP MESSAGE
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# ==============================================================================
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show_help() {
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echo "Usage: $0 [OPTIONS]"
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echo ""
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echo "Options:"
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echo " -h, --help Display this help message"
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echo " -l, --list NUMBER Show the last X records (default: 10, max: 1000)"
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echo " -f, --from EMAIL/DOMAIN Filter by SENDER (substring match)"
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echo " -t, --to EMAIL/DOMAIN Filter by RECIPIENT (substring match)"
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echo " -i, --id QUEUE_ID Search for a specific Queue ID"
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echo " -d, --date \"MMM DD\" Filter by date (e.g., \"Mar 27\")"
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exit 0
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}
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# ==============================================================================
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# 2. PRIVILEGE CHECK & TTY COLOR DETECTION
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# ==============================================================================
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if [[ $EUID -ne 0 ]]; then
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echo "Error: This script must be run as root (use sudo)." >&2
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exit 1
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fi
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# Detect TTY for color support
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export USE_COLOR=0
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[[ -t 1 ]] && USE_COLOR=1
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LIMIT=10
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MAX_LIMIT=1000
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FROM_FILTER=""
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TO_FILTER=""
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ID_FILTER=""
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DATE_FILTER=""
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MAX_INPUT_LEN=100
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# Parse arguments using Bash-native slicing (no fork)
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while [[ "$#" -gt 0 ]]; do
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case $1 in
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-h|--help) show_help ;;
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-l|--list)
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if [[ "$2" =~ ^[0-9]+$ ]]; then LIMIT="$2"; else LIMIT=10; fi
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(( LIMIT > MAX_LIMIT )) && LIMIT=$MAX_LIMIT
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shift ;;
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-f|--from) FROM_FILTER="${2:0:$MAX_INPUT_LEN}"; shift ;;
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-t|--to) TO_FILTER="${2:0:$MAX_INPUT_LEN}"; shift ;;
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-i|--id) ID_FILTER="${2:0:$MAX_INPUT_LEN}"; shift ;;
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-d|--date) DATE_FILTER="${2:0:$MAX_INPUT_LEN}"; shift ;;
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*) echo "Unknown parameter: $1. Use -h for help." >&2; exit 1 ;;
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esac
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shift
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done
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# ==============================================================================
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# 3. SAFE LOG FILE COLLECTION (Fixed sort -z bug & portability)
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# ==============================================================================
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LOG_FILES=()
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# Detect sort -z support and collect files safely
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if sort -z </dev/null >/dev/null 2>&1; then
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while IFS= read -r -d '' file; do
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LOG_FILES+=("$file")
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done < <(find /var/log -maxdepth 1 -name 'maillog*' -type f -print0 | sort -z)
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else
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# POSIX Fallback (assumes no newlines in log filenames, which is safe in /var/log)
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while IFS= read -r -d '' file; do
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LOG_FILES+=("$file")
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done < <(find /var/log -maxdepth 1 -name 'maillog*' -type f -print0 | sort)
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fi
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if [ ${#LOG_FILES[@]} -eq 0 ]; then
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echo "Error: No Postfix logs found in /var/log/." >&2
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exit 1
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fi
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TMP_DATA=$(mktemp /tmp/postfix_log.XXXXXX)
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trap 'rm -f -- "$TMP_DATA"' EXIT
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# ==============================================================================
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# 4. OPTIMIZED LOG READING
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# ==============================================================================
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read_logs() {
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if [[ -n "$DATE_FILTER" || -n "$ID_FILTER" ]]; then
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zcat -f -- "${LOG_FILES[@]}"
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else
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if [[ -f /var/log/maillog ]]; then
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tail -n 50000 /var/log/maillog
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else
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zcat -f -- "${LOG_FILES[@]}" | tail -n 50000
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fi
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fi
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}
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# ==============================================================================
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# 5. LOG ANALYSIS (Hardened AWK with Memory Cleanup)
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# ==============================================================================
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read_logs | awk -v f_filt="$FROM_FILTER" -v t_filt="$TO_FILTER" -v i_filt="$ID_FILTER" -v d_filt="$DATE_FILTER" '
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function shorten(addr, max_len) {
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if (length(addr) <= max_len) return addr;
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if (index(addr, "@") > 0) {
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split(addr, p, "@");
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user = p[1]; domain = "@" p[2];
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if (length(domain) > (max_len - 10)) return ".." substr(domain, length(domain)-(max_len-5));
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user_limit = max_len - length(domain) - 2;
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if (user_limit < 3) user_limit = 3;
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return substr(user, 1, user_limit) ".." domain;
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}
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return substr(addr, 1, max_len-3) "...";
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}
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BEGIN {
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blue="\033[1;34m"; bold="\033[1m"; reset="\033[0m"; green="\033[1;32m"; red="\033[1;31m"; yellow="\033[1;33m"; cyan="\033[0;36m"; gray="\033[0;90m"
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if (ENVIRON["USE_COLOR"] != "1") {
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blue=""; bold=""; reset=""; green=""; red=""; yellow=""; cyan=""; gray="";
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}
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printf "%-16s %-12s %-16s %-36s %-31s %-12s %s\n", "DATE-TIME", "ID", "CLIENT_IP", "SENDER", "RECIPIENT", "STATUS", "REASON"
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}
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{
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if (d_filt != "" && index($1 " " $2, d_filt) == 0) next;
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full_time = $1 "-" $2 "-" $3;
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qid = "";
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if ($6 ~ /^[A-F0-9]+:$/) { qid = $6; gsub(/:/, "", qid); }
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else if ($5 ~ /^[A-F0-9]+:$/) { qid = $5; gsub(/:/, "", qid); }
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if (qid == "" && index($0, "NOQUEUE") == 0) next;
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if (index($0, "client=") > 0) {
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match($0, /\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\]/);
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if (RLENGTH > 0) client_ip[qid] = substr($0, RSTART+1, RLENGTH-2);
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}
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if (index($0, "from=<") > 0) {
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match($0, /from=<[^>]+>/);
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if (RLENGTH > 0) from[qid] = substr($0, RSTART+6, RLENGTH-7);
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}
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if (index($0, "to=<") > 0 && index($0, "status=") > 0) {
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s_ip = (client_ip[qid] != "") ? client_ip[qid] : "local";
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if (s_ip == "127.0.0.1") {
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delete client_ip[qid]; delete from[qid];
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next;
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}
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s_from = (from[qid] != "") ? from[qid] : "-";
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match($0, /to=<[^>]+>/);
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s_to = (RLENGTH > 0) ? substr($0, RSTART+4, RLENGTH-5) : "-";
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match($0, /status=[a-z]+/);
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s_stat = (RLENGTH > 0) ? substr($0, RSTART+7, RLENGTH-7) : "unknown";
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s_reason = "-"; r_col = reset; scol = reset;
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if (s_stat == "sent") { scol = green; s_reason = "OK"; r_col = cyan; }
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else if (s_stat == "deferred") { scol = yellow; r_col = yellow; }
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else if (s_stat == "bounced") { scol = red; r_col = red; }
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if (s_stat != "sent" && match($0, /\([^)]*\)/)) {
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s_reason = substr($0, RSTART+1, RLENGTH-2);
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if (length(s_reason) > 25) s_reason = substr(s_reason, 1, 22) "..";
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}
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if ((f_filt == "" || index(s_from, f_filt) > 0) &&
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(t_filt == "" || index(s_to, t_filt) > 0) &&
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(i_filt == "" || index(qid, i_filt) > 0)) {
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printf "%s%-16s %s%-12s%s %s%-16s%s %-36s %-31s %s%-12s%s %s[%s]%s\n",
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reset, full_time, blue, qid, reset, gray, s_ip, reset, shorten(s_from, 35), shorten(s_to, 30), scol, s_stat, reset, r_col, s_reason, reset;
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}
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delete client_ip[qid]; delete from[qid];
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}
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if (index($0, "NOQUEUE: reject:") > 0) {
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match($0, /from=<[^>]+>/); f = (RLENGTH > 0) ? substr($0, RSTART+6, RLENGTH-7) : "-";
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match($0, /to=<[^>]+>/); t = (RLENGTH > 0) ? substr($0, RSTART+4, RLENGTH-5) : "-";
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n_ip = "unknown";
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if (match($0, /\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\]/)) n_ip = substr($0, RSTART+1, RLENGTH-2);
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if ((f_filt == "" || index(f, f_filt) > 0) &&
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(t_filt == "" || index(t, t_filt) > 0) &&
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(i_filt == "" || i_filt == "NOQUEUE")) {
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printf "%s%-16s %s%-12s%s %s%-16s%s %-36s %-31s %s%-12s%s %s[Blocked]%s\n",
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reset, full_time, red, "NOQUEUE", reset, gray, n_ip, reset, shorten(f, 35), shorten(t, 30), red, "REJECT", reset, yellow, "Policy", reset;
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}
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}
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}' > "$TMP_DATA"
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# ==============================================================================
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# 6. FINAL OUTPUT (POSIX-Safe Process Optimization)
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# ==============================================================================
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head -n 1 "$TMP_DATA"
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sed '1d' "$TMP_DATA" | tail -n "$LIMIT" |