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#!/bin/sh
#
# Author: Emanuel Haupt <ehaupt@FreeBSD.org>
# PROVIDE: socat
# REQUIRE: LOGIN
# KEYWORD: shutdown
# Add the following lines to /etc/rc.conf to enable socat:
# socat_enable="YES"
# socat_daemonuser="root" for priviledged ports e.g.
# socat_flags="<set as needed>" or create /usr/local/etc/socat-instances.conf
. /etc/rc.subr
name="socat"
rcvar=socat_enable
load_rc_config $name
: ${socat_enable="NO"}
: ${socat_daemonuser:=nobody}
: ${socat_config:=%%PREFIX%%/etc/socat-instances.conf}
start_precmd="socat_prestart"
pidfile=/var/run/socat.pid
procname="%%PREFIX%%/bin/socat"
command=/usr/sbin/daemon
command_args=' -f -p ${pidfile} -u ${socat_daemonuser} ${procname} ${socat_flags}'
[ -n "${2}" ] && socat_instance_arg=`echo "${2}" | tr '[:lower:]' '[:upper:]'`
socat_prestart()
{
# socat_flags gets applied too early if we don't do this.
# I didn't want to force people to update their rc.conf files
# and change the socat_flags to something else.
rc_flags=""
}
socat_parse_instances()
{
local _line _section_search
socat_instances=`grep -Eo "^[[:blank:]]*\[[[:alnum:]_]+\]" ${socat_config} |
tr '[:lower:]' '[:upper:]'`
if [ -n "${socat_instance_arg}" ] && ! echo "${socat_instances}" |
grep -q -E '(^|[[:blank:]])\['${socat_instance_arg}'\]([[:blank:]]|$)'
then
echo -n "$name: Can't find instance definition " >&2
echo "\"[${1}]\" in config file ${socat_config}." >&2
return 1
fi
[ -n "${socat_instance_arg}" ] && socat_instances="[${socat_instance_arg}]"
for i in ${socat_instances}; do
_section_search=1
_instance=${i#[}
_instance=${_instance%]}
# Process each line of the optional config file, which
# matches the regex, defined at the end of the loop.
# There we filter to only process definitions and section separators.
while read -r _line; do
# Look for ${i} section until found
if [ ${_section_search} ]; then
if echo "${_line}" | grep -qi "^[[:blank:]]*\[${_instance}\]"; then
unset _section_search
continue # Nothing to do with section identifiers
else
# Continue with next line s_instance we haven't reached our section yet
continue
fi
fi
# Stop processing if the current line is another section identifier.
echo "${_line}" | grep -q "^[[:blank:]]*\[[^]]*\]" && break
# Only proceed with lines which contain variable declaration.
echo "${_line}" | grep -q -E \
-e "^[[:blank:]]*[[:alpha:]_][[:alnum:]_]{0,30}=" ||
continue
# Filter malformed lines (which could cause command execution)
# (shell exits with test result, wich is false as soon as
# there's a 2nd argument (1st is considered as 0))
eval sh -c \'[ \$# -eq 0 ]\' "${_line}" \|\| continue
eval socat_${_instance}_${_line%%=*}=${_line#*=}
done << EOCFF
$(cat "${socat_config}")
EOCFF
done
}
# Check if daemon(8) handles title and syslog parameters
# (as in FreeBSD 11).
if [ "${1%start}" != "${1}" ]; then
daemon_extended_args=" -l daemon"
${command} -t "test" ${daemon_extended_args} -f -u nobody true \
> /dev/null 2>&1 || unset daemon_extended_args
fi
# If we can read the config file, handle multiple instances,
# else just process a single instance.
if [ -r ${socat_config} ]; then
# T O D O : Check rc(8) how restarts are handled and make
# all-instaces restart working.
# For now refuse restart commands without instance argument.
#
if [ "${1%restart}" != "${1}" ] && [ -z "${socat_instance_arg}" ]; then
echo -n "$name: Restart command requires a instance argument,"
echo "since config file is in use."
exit 1
fi
if [ -n "${socat_flags}" ]; then
echo -n "${name}: WARNING:"
echo -n " Ignoring \"socat_flags\" in rc.conf because"
echo " \"${socat_config}\" is present."
fi
socat_parse_instances "${2}" || exit 1
default_pidfile="${pidfile}"
default_socat_daemonuser="${socat_daemonuser}"
eval default_command_args=\'${command_args}\'
for i in ${socat_instances}; do
_instance=${i#[}
_instance=${_instance%]}
eval socat_flags=\"\$\{socat_${_instance}_flags\}\"
# We need to have socat_flags to start, else skip start commands
if [ "${1%start}" != "${1}" ] && [ -z "${socat_flags}" ]; then
echo -n "$name: Missing \"flags\" definition for"
echo " instance ${i}, skipping \"${1}\" command."
continue
fi
eval pidfile=\"\$\{socat_${_instance}_pidfile\}\"
[ -n "${pidfile}" ] ||
pidfile="${default_pidfile%.pid}_${_instance}.pid"
eval socat_daemonuser=\"\$\{socat_${_instance}_daemonuser\}\"
[ -n "${socat_daemonuser}" ] ||
socat_daemonuser="${default_socat_daemonuser}"
eval command_args=\"${default_command_args}\"
if [ -n "${daemon_extended_args}" ]; then
# A bit confusing, but to keep 80 chars line break:
command_args="(${_instance})\" ${command_args}"
command_args="-t \"${procname} ${command_args}"
command_args="${daemon_extended_args} ${command_args}"
fi
run_rc_command "$1"
done
else
if [ -n "${socat_instance_arg}" ]; then
echo -n "$name: Missing config file (${socat_config}), " >&2
echo "can't handle instance \"${2}\"." >&2
exit 1
fi
eval command_args=\"${daemon_extended_args} ${command_args}\"
run_rc_command "$1"
fi
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