83eb2c3700
literal name_enable wherever possible, and ${name}_enable
when it's not, to prepare for the demise of set_rcvar().
In cases where I had to hand-edit unusual instances also
modify formatting slightly to be more uniform (and in
some cases, correct). This includes adding some $FreeBSD$
tags, and most importantly moving rcvar= to right after
name= so it's clear that one is derived from the other.
151 lines
4.3 KiB
Bash
151 lines
4.3 KiB
Bash
#!/bin/sh
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# $FreeBSD$
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# PROVIDE: ucarp
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# REQUIRE: DAEMON
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# KEYWORD: shutdown
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# Add the following lines to /etc/rc.conf to enable & configure ucarp:
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#
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# Mandatory options:
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#
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# ucarp_enable (bool): Set it to "YES" to enable ucarp.
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# Default is "NO".
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# ucarp_addr (str): Set virtual shared IP address.
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# ucarp_if (str): Set interface to use for ucarp checks.
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# ucarp_src (str): Set source (real) IP address of that host.
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# ucarp_passfile (str): Set file to read password from. The file must
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# not be readable by 'others'. Unset by default.
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# ucarp_pass (str): Set password. No defaults set and you are
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# strongly encouraged to use ${ucarp_passfile}
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# variable instead.
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# Optional tunes:
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#
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# ucarp_vhid (int): Set virtual IP identifier (1-255). Default is "1".
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# ucarp_preempt (bool): Set it to "YES" to become a master as soon as
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# possible. Default is "NO".
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# ucarp_advbase (int): Set advertisement frequency (seconds).
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# ucarp_advskew (int): Set advertisement skew (0-255).
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# ucarp_upscript (str): Run <file> to become a master. You may want to
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# use %%PREFIX%%/sbin/ucarp-up script for this
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# purpose.
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# ucarp_downscript (str): Run <file> to become a backup. You may want to
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# use %%PREFIX%%/sbin/ucarp-down script for this
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# purpose.
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# ucarp_deadratio (int): Set ratio to consider a host as dead.
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# ucarp_shutdown (bool): Set it to "YES" to call shutdown script at exit.
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# Default is "YES".
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# ucarp_facility (str): Set syslog facility. Default is "daemon".
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# ucarp_xparam (str): Extra parameter to send to up/down scripts. No
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# defaults set.
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. /etc/rc.subr
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name="ucarp"
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rcvar=ucarp_enable
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load_rc_config $name
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: ${ucarp_enable="NO"}
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: ${ucarp_vhid="1"}
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: ${ucarp_preempt="NO"}
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: ${ucarp_shutdown="YES"}
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: ${ucarp_facility="daemon"}
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command=%%PREFIX%%/sbin/ucarp
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command_args="-i ${ucarp_if} -f ${ucarp_facility} -B "
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start_precmd="build_command_args"
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build_command_args()
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{
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# Check for mandatory arguments are set.
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for _var in ucarp_src ucarp_addr ucarp_if; do
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eval "_val=\$${_var}"
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if [ -z "${_val}" ]; then
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err 255 "\${${_var}} parameter required to start."
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fi
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done
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# ${ucarp_passfile} or ${ucarp_pass} must also be set,
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if [ -z "${ucarp_passfile}" -a -z "${ucarp_pass}" ]; then
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str="You need to set one of \${ucarp_passfile} or"
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str=" \${ucarp_pass} variable to run ucarp."
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err 255 "${str}"
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fi
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# but not both.
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if [ ! -z "${ucarp_passfile}" -a ! -z "${ucarp_pass}" ]; then
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str="You should not set both \${ucarp_passfile} and"
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str="${str} \${ucarp_pass} variables. "
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str="${str} Will try to use \${ucarp_passfile} instead."
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warn "${str}"
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fi
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# Set password source.
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if [ ! -z "${ucarp_passfile}" ]; then
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# The variable should point to a file resource.
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if [ ! -f "${ucarp_passfile}" ]; then
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str="\${ucarp_passfile} variable is set,"
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str="${str} but the value is not a file."
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err 255 "${str}"
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else
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# Check permissions: password file must not be world
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# readable. First, take the file permissions mode as a
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# shell variable.
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eval `stat -s ${ucarp_passfile}`
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# Yeld the last digit and check if `r' bit is set.
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if [ $((${st_mode##${st_mode%%?}} & 4)) -ne 0 ]; then
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err 255 "Password file is readable by others."
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fi
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# Set the passfile argument.
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command_args="${command_args} \
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--passfile=${ucarp_passfile}"
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fi
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else
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# Set the password with command line argument.
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command_args="${command_args} -p ${ucarp_pass}"
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fi
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# Check and set optional args if any.
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if checkyesno ucarp_preempt; then
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command_args="${command_args} -P"
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fi
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if checkyesno ucarp_shutdown; then
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command_args="${command_args} -z"
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fi
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if [ ! -z "${ucarp_xparam}" ]; then
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command_args="${command_args} -x \"${ucarp_xparam}\""
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fi
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if ! [ -z ${ucarp_upscript} ]; then
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command_args="${command_args} -u ${ucarp_upscript}"
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fi
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if ! [ -z ${ucarp_downscript} ]; then
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command_args="${command_args} -d ${ucarp_downscript}"
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fi
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if ! [ -z ${ucarp_deadratio} ]; then
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command_args="${command_args} -r ${ucarp_deadratio}"
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fi
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if ! [ -z ${ucarp_advbase} ]; then
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command_args="${command_args} -b ${ucarp_advbase}"
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fi
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if ! [ -z ${ucarp_advskew} ]; then
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command_args="${command_args} -k ${ucarp_advskew}"
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fi
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command_args="${command_args} -s ${ucarp_src} -a ${ucarp_addr}"
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command_args="${command_args} -i ${ucarp_if} -v ${ucarp_vhid}"
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}
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run_rc_command "$1"
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