mirror of
https://github.com/ovh/the-bastion.git
synced 2025-02-26 00:24:12 +08:00
76 lines
2.4 KiB
Bash
Executable file
76 lines
2.4 KiB
Bash
Executable file
#! /usr/bin/env bash
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# vim: set filetype=sh ts=4 sw=4 sts=4 et:
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set -e
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basedir=$(readlink -f "$(dirname "$0")"/../..)
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# shellcheck source=lib/shell/functions.inc
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. "$basedir"/lib/shell/functions.inc
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# default config values for this script
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MAX_AGE=86400
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# set error trap, read config, setup logging, exit early if script is disabled, etc.
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script_init osh-lingering-sessions-reaper config_optional check_secure_lax
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_log "Terminating lingering sessions..."
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# 1. kill ttyrec processes running for more than MAX_AGE that don't have any tty
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tokill=''
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nb=0
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# shellcheck disable=SC2162
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while read etimes pid tty
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do
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if [ "$tty" = "?" ] && [ "$etimes" -gt "$MAX_AGE" ]; then
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tokill="$tokill $pid"
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(( ++nb ))
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fi
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done < <(ps -C ttyrec -o etimes,pid,tty --no-header)
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if [ -n "$tokill" ]; then
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# add || true to avoid script termination due to TOCTTOU and set -e
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# shellcheck disable=SC2086
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kill $tokill || true
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_log "Terminated $nb orphan ttyrec sessions (pids$tokill)"
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fi
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# 2. kill *user* (non-root) sshd processes running for more than MAX_AGE that don't have any tty and no children
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tokill=''
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nb=0
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# shellcheck disable=SC2162
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while read etimes pid tty user
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do
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if [ "$tty" = "?" ] && [ "$user" != "root" ] && [ "$etimes" -gt "$MAX_AGE" ]; then
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if [ "$(ps --no-header --ppid "$pid" | wc -l)" = 0 ]; then
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tokill="$tokill $pid"
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(( ++nb ))
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fi
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fi
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done < <(ps -C sshd --no-header -o etimes,pid,tty,user)
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if [ -n "$tokill" ]; then
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# add || true to avoid script termination due to TOCTTOU and set -e
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# shellcheck disable=SC2086
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kill $tokill || true
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_log "Terminated $nb orphan sshd sessions (pids$tokill)"
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fi
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# 3. kill lingering bastion plugins running for more than MAX_AGE that don't have any tty and whose ppid is init (1)
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tokill=''
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nb=0
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pidlist=$(pgrep -f "perl $basedir/bin/plugin" | tr "\\n" "," | sed -e s/,$//)
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if [ -n "$pidlist" ]; then
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# shellcheck disable=SC2162
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while read etimes pid tty ppid
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do
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if [ "$tty" = "?" ] && [ "$ppid" = 1 ] && [ "$etimes" -gt "$MAX_AGE" ]; then
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tokill="$tokill $pid"
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(( ++nb ))
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fi
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done < <(ps --no-header -o etimes,pid,tty,ppid -p "$pidlist")
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if [ -n "$tokill" ]; then
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# add || true to avoid script termination due to TOCTTOU and set -e
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# shellcheck disable=SC2086
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kill $tokill || true
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_log "Terminated $nb orphan plugins (pids$tokill)"
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fi
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fi
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exit_success
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