countconn

   1 #!/bin/sh
   2
   3 trap "exit 1" USR1
   4
   5 USAGE="usage: ${0} [-dm] [-l #]"
   6
   7 usage() {
   8         printf "%s\n" "$USAGE" >&2; exit 2
   9 }
  10
  11 err() {
  12         printf "error: server not detected, needs to be set manually\n" >&2
  13         printf "set \$SERVER or modify the script itself\n" >&2
  14         kill -USR1 "$$"
  15 }
  16
  17 CUTCMD="-d: -f2,3"
  18 TAILN=30
  19
  20 while getopts "dl:m" flag; do
  21         case "$flag" in
  22         d) CUTCMD="-d/ -f1,2" ;;
  23         m) CUTCMD="-d: -f2,3" ;;
  24         l)
  25                 if [ "$OPTARG" -eq "$OPTARG" ]; then
  26                         TAILN="$OPTARG"
  27                 else
  28                         usage
  29                 fi ;;
  30         *) usage ;;
  31         esac
  32 done
  33
  34 # ... && ... || is not an if-then-else, but this works because
  35 # there's no way for only one printf to fail
  36 [ -z "$SERVER" ] && SERVER=$(which > /dev/null 2>&1 apache2 && printf "apache2" || which > /dev/null 2>&1 nginx && printf "nginx" || err)
  37
  38 CURDAY=$(tail -n1 /var/log/"$SERVER"/access.log | grep -oE "[0-9]{2}/.*/[0-9]{4}:")
  39
  40 { cat /var/log/"$SERVER"/access.log /var/log/"$SERVER"/access.log.1; gzip -cd /var/log/"$SERVER"/access.log.*.gz; } | awk -v curday="$CURDAY" '$0 ~ curday { if (match($0, /[0-9]{2}\/.*\/[0-9]{4}:[0-9]{2}:[0-9]{2}:[0-9]{2}/)) { print substr($0, RSTART, RLENGTH) } next } { exit }' | cut $CUTCMD | uniq -c | tail -n"$TAILN"