pam/pam_lastreboot

   1 #!/bin/sh
   2
   3 PAM_SUCCESS=0
   4 PAM_SYSTEM_ERR=4
   5 PAM_PERM_DENIED=6
   6 PAM_AUTH_ERR=7
   7 PAM_IGNORE=25
   8
   9 #PAM_RHOST=
  10 #PAM_SERVICE=login
  11 #PAM_TTY=/dev/pts/9
  12 #PAM_SERVICE=sshd
  13 #PAM_TTY=ssh
  14 #PAM_TYPE=open_session
  15 #PAM_TYPE=close_session
  16 #PAM_USER=joedoe
  17
  18 last_reboot()
  19 {
  20         last_wtmp_entry 7 reboot
  21 }
  22 last_wtmp_login()
  23 {
  24         last_wtmp_entry 1 "$1"
  25 }
  26 last_wtmp_entry()
  27 {
  28         local wtmp_field=$1
  29         local wtmp_match=$2
  30
  31         for wtmp in $(echo /var/log/wtmp* | tr " " "\n" | sort -t. -k2n)
  32         do
  33                 timestamp=$(
  34                         LD_PRELOAD=/usr/lib/yazzy-preload/openhelper.so \
  35                         OPENHELPER_FNMATCH='/var/log/wtmp.*.*' \
  36                         OPENHELPER_COMMAND='case "$OPENHELPER_FILE" in
  37                         *.xz) exec unxz -c "$OPENHELPER_FILE";;
  38                         *.gz) exec gunzip -c "$OPENHELPER_FILE";;
  39                         *.bz2) exec bunzip2 -c "$OPENHELPER_FILE";;
  40                         *) exit 95;;
  41                         esac' \
  42                         lastcsv -f "$wtmp" -n 1 "$wtmp_match" |\
  43                         wtmp_match=$wtmp_match \
  44                         awk -F';' '$'$wtmp_field'==ENVIRON["wtmp_match"]{print $5}'
  45                 )
  46                 if [ -n "$timestamp" ]
  47                 then
  48                         echo "$timestamp"
  49                         break
  50                 fi
  51         done
  52 }
  53
  54 lastlogin=`last_wtmp_login "$PAM_USER"`
  55 lastreboot=`last_reboot`
  56
  57 if [ -n "$lastlogin" ]
  58 then
  59         lastlogin=$lastlogin perl -MTime::Duration -e 'printf "Last login: %s\n", ago(time - $ENV{"lastlogin"});'
  60 fi
  61
  62 if expr "$*" : '.*\<force\>' >/dev/null || [ -z "$lastlogin" ] || [ "$lastlogin" -le "$lastreboot" ] 2>/dev/null
  63 then
  64         (
  65                 tput bold
  66                 tput setaf 3
  67                 echo "First login since last reboot: $(date -d @"$lastreboot")"
  68                 tput sgr0
  69         ) 2>/dev/null
  70 fi
  71
  72 exit $PAM_SUCCESS