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# -*- mode:sh -*-
# Little common functions
# push a mirror attached to us.
# Arguments (using an array named SIGNAL_OPTS):
#
# $MIRROR - Name for the mirror, also basename for the logfile
# $HOSTNAME - Hostname to push to
# $USERNAME - Username there
# $SSHPROTO - Protocol version, either 1 or 2.
# $SSHKEY - the ssh private key file to use for this push
# $SSHOPTS - any other option ssh accepts, passed blindly, be careful
# $PUSHLOCKOWN - own lockfile name to touch after stage1 in pushtype=staged
# $PUSHTYPE - what kind of push should be done?
# all - normal, just push once with ssh backgrounded and finish
# staged - staged. first push stage1, then wait for $PUSHLOCKs to appear,
# then push stage2
# $PUSHARCHIVE - what archive to sync? (Multiple mirrors behind one ssh key!)
# $PUSHCB - do we want a callback?
#
# This function assumes that the variable LOG is set to a directory where
# logfiles can be written to.
# Additionally $PUSHLOCKS has to be defined as a set of space delimited strings
# (list of "lock"files) to wait for if you want pushtype=staged
#
# Pushes might be done in background (for type all).
signal () {
ARGS="SIGNAL_OPTS[*]"
local ${!ARGS}
# Defaults we always want, no matter what
SSH_OPTIONS="-o BatchMode=yes -o SetupTimeOut=45 -o ConnectTimeout=45 -o PasswordAuthentication=no"
if [ $SSHOPTS -n ]; then
SSH_OPTIONS="$SSH_OPTIONS $SSHOPTS"
fi
if [ ${SSHPROTO} -ne 1 ] && [ ${SSHPROTO} -ne 2 ]; then
# Idiots, we only want 1 or 2. Cant decide? Lets force 2
${SSHPROTO}=2
fi
date -u >> "${LOGDIR}/${MIRROR}.log"
if [ "xallx" = "x${PUSHTYPE}x" ]; then
# Default normal "fire and forget" push
ssh $SSH_OPTIONS -i "${SSHKEY}" -o"user ${USERNAME}" -${SSHPROTO} "${HOSTNAME}" "sync:all" >>"${LOGDIR}/${MIRROR}.log" 2>&1 &
elif [ "xstagedx" = "x{$PUSHTYPE}x"]; then
# Want a staged push. Fine, lets do that
PUSHARGS=""
if [ -n ${PUSHARCHIVE} ]; then
PUSHARGS="${PUSHARGS sync:archive:${PUSHARCHIVE}"
fi
if [ -n ${PUSHCB} ]; then
PUSHARGS="${PUSHARGS sync:callback"
fi
# Step1: Do a push to only sync stage1, do not background
PUSHARGS1="sync:stage1"
ssh $SSH_OPTIONS -i "${SSHKEY}" -o"user ${USERNAME}" -${SSHPROTO} "${HOSTNAME}" "${PUSHARGS} ${PUSHARGS1}" >>"${LOGDIR}/${MIRROR}.log" 2>&1
touch "${PUSHLOCKOWN}"
# Step2: Wait for all the other "lock"files to appear.
tries=0
# We do not wait forever
while [ ${tries} -lt 30 ]; do
total=0
found=0
for file in ${PUSHLOCKS}; do
total=$((total + 1))
if [ -f ${file} ]; then
found=$((found + 1))
fi
done
if [ ${total} -eq ${found} ];
break;
fi
sleep 20
done
rm -f "${PUSHLOCKOWN}"
# Step3: It either timed out or we have all the "lock"files, sync stage2
PUSHARGS1="sync:stage2"
ssh $SSH_OPTIONS -i "${SSHKEY}" -o"user ${USERNAME}" -${SSHPROTO} "${HOSTNAME}" "${PUSHARGS} ${PUSHARGS2}" >>"${LOGDIR}/${MIRROR}.log" 2>&1
else
# Can't decide? Then you get nothing.
fi
}
# callback, used by ftpsync
callback () {
# Defaults we always want, no matter what
SSH_OPTIONS="-o BatchMode=yes -o SetupTimeOut=45 -o ConnectTimeout=45 -o PasswordAuthentication=no"
ssh $SSH_OPTIONS -i "$3" -o"user $1" "$2" callback:${HOSTNAME}
}
# log something (basically echo it together with a timestamp)
#
# Set $PROGRAM to a string to have it added to the output.
log () {
if [ -z ${PROGRAM} ]; then
echo "$(date +"%b %d %H:%M:%S") $(hostname -s) [$$] $@"
else
echo "$(date +"%b %d %H:%M:%S") $(hostname -s) ${PROGRAM}[$$]: $@"
fi
}
# log the message using log() but then also send a mail
# to the address configured in MAILTO (if non-empty)
error () {
log "$@"
if [ -z ${MAILTO} ]; then
echo "$@" | mail -e -s "[$PROGRAM@$(hostname -s)] ERROR [$$]" ${MAILTO}
fi
}
# run a hook
# needs array variable HOOK setup with HOOKNR being a number an HOOKSCR
# the script to run.
hook () {
ARGS="HOOK[*]"
local ${!ARGS}
if [ -n "${HOOKSCR}" ]; then
log "Running hook $HOOKNR: ${HOOKSCR}"
set +e
${HOOKSCR}
result=$?
set -e
log "Back from hook $HOOKNR, got returncode ${result}"
return $result
else
return 0
fi
}
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