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#! /bin/sh

# Copyright (c) The Exim Maintainers 2023
# Copyright (c) University of Cambridge, 1995 - 2007
# See the file NOTICE for conditions of use and distribution.
# SPDX-License-Identifier: GPL-2.0-or-later

# Except when they appear in comments, the following placeholders in this
# source are replaced when it is turned into a runnable script:
#
# CONFIGURE_FILE_USE_NODE
# CONFIGURE_FILE
# BIN_DIRECTORY
# EXIWHAT_PS_CMD
# EXIWHAT_PS_ARG
# EXIWHAT_KILL_SIGNAL
# EXIWHAT_EGREP_ARG
# EXIWHAT_MULTIKILL_CMD
# EXIWHAT_MULTIKILL_ARG
# RM_COMMAND

# This file has been so processed.

# Shell script for seeing what the exim processes are doing. It gets rid
# of the old process log, then sends SIGUSR1 to all exim processes to get
# them to write their state to the log. Then it displays the contents of
# the log.

# The following lines are generated from Exim's configuration file when
# this source is built into a script, but you can subsequently edit them
# without rebuilding things, as long are you are careful not to overwrite
# the script in the next Exim rebuild/install. However, it's best to
# arrange your build-time configuration file to get the correct values.

rm=/bin/rm

# Some operating systems have a command that finds processes that match
# certain conditions (by default usually those running specific commands)
# and sends them signals. If such a command is defined for your OS, the
# following variables are set and used.

multikill_cmd=killall
multikill_arg=exim

# In other operating systems, Exim has to use "ps" and "grep" to find the
# processes itself. In those cases, the next three variables are used:

ps_cmd=/bin/ps
ps_arg=ax
egrep_arg='/exim( |$)'

# In both cases, kill_arg is the argument for the (multi)kill command to send
# SIGUSR1 (at least one OS requires a numeric value).

signal=-USR1

# See if this installation is using the esoteric "USE_NODE" feature of Exim,
# in which it uses the host's name as a suffix for the configuration file name.

if [ "x$1" = x--version -o "x$1" = x-v ]
then
    echo "`basename $0`: $0"
    echo "build: 4.99.1"
    exit 0
fi

if [ "" = "yes" ]; then
  hostsuffix=.`uname -n`
fi

# Now find the configuration file name. This has got complicated because
# CONFIGURE_FILE may now be a list of files. The one that is used is the first
# one that exists. Mimic the code in readconf.c by testing first for the
# suffixed file in each case.

set `awk -F: '{ for (i = 1; i <= NF; i++) print $i }' <<End
/etc/exim.conf
End
`
while [ "$config" = "" -a $# -gt 0 ] ; do
  if [ -f "$1$hostsuffix" ] ; then
    config="$1$hostsuffix"
  elif [ -f "$1" ] ; then
    config="$1"
  fi
  shift
done

# check we have a config file
if [ "$config" = "" -o ! -f "$config" ]; then
  echo Config file not found.
  exit 1
fi

# Determine where the spool directory is. Search for an exim_path setting
# in the configure file; otherwise use the bin directory. Call that version of
# Exim to find the spool directory. BEWARE: a tab character is needed in the
# first command below. It has had a nasty tendency to get lost in the past. Use
# a variable to hold a space and a tab. This is less likely to be touched.

st='	 '
exim_path=`grep "^[$st]*exim_path" $config | sed "s/.*=[$st]*//"`
if test "$exim_path" = ""; then exim_path=/usr/sbin/exim; fi
spool_directory=`$exim_path -C $config -bP spool_directory | sed "s/.*=[ ]*//"`
process_log_path=`$exim_path -C $config -bP process_log_path | sed "s/.*=[ ]*//"`

# The file that Exim writes when sent the SIGUSR1 signal is specified by
# the process_log_path option. If that is not defined, Exim uses the file
# called "exim-process.info" in the spool directory.

log=$process_log_path
if [ "$log" = "" ] ; then
  log=$spool_directory/exim-process.info
fi

# Now do the job.

$rm -f ${log}
if [ -f ${log} ]; then
  echo "** Failed to remove ${log}"
  exit 1
fi

# If there is a multikill command, use it. On some OS this command is called
# "killall" (Linux, FreeBSD). On Solaris it is called "pkill". Note that on
# Solaris, "killall" kills ALL processes - this is the System V version of this
# command, and not what we want!

if [ "$multikill_cmd" != "" ] && type "$multikill_cmd" >/dev/null 2>&1; then
  $multikill_cmd $signal "$multikill_arg"

# No multikill command; do it the hard way

else
  $ps_cmd $ps_arg | \
    grep -E "$egrep_arg" | \
    awk "{print \"kill $signal \"\$1}" | \
    uniq | sh
fi

sleep 1

if [ ! -s ${log} ] ; then echo "No exim process data" ;
  else sort -nu ${log} ; fi

# End of exiwhat

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