#!/bin/bash
#
# This script gets logs from our production webserver and archives them
# in a permanent location each day.


# The name of the domain, and the logs we want
DOMAIN="www.cancerprev.org"
LOGS="access ssl_access error ssl_error"

# SSH private key for authenticating connection to remote host
SSH_ID="/etc/local-ssh/id_dsa"

# Where to get the log files from
SOURCE_USER="canprev"
SOURCE_HOST="leary.csoft.net"
SOURCE_DIR="www/logs"
SOURCE_SUFFIX=".0.gz"

# Where to put them
DEST_DIR="/var/log/local-vhost/$DOMAIN/`date +%Y`"
DEST_SUFFIX="-`date +%Y-%m-%d`.gz"
DEST_PERMS=444


# Makes sure the destination directory exists
if [ ! -d "$DEST_DIR" ]; then
    mkdir --parents "$DEST_DIR" || exit 1
fi

# Makes sure the destination directory is writable
if [ ! -w "$DEST_DIR" ]; then
    echo "I do not have access to write to $DEST_DIR." >&2
    exit 1
fi

# Gets the logs
for log in $LOGS; do

    # Only gets the file if it doesn't already exist.
    if [ ! -f "$DEST_DIR/$log$DEST_SUFFIX" ]; then
        
        # Copies the file from the remote host.
        scp -p -B -q -i $SSH_ID \
            "$SOURCE_USER@$SOURCE_HOST:$SOURCE_DIR/$log$SOURCE_SUFFIX" \
            "$DEST_DIR/$log$DEST_SUFFIX"

        # If the copy failed, removes any possibly incomplete file and
        # exit with error.
        if [ ${PIPESTATUS[0]} != "0" ]; then
            rm -f "$DEST_DIR/$log$DEST_SUFFIX"
            exit 1
        fi

        # Makes sure the the new file has proper permissions.
        chmod $DEST_PERMS "$DEST_DIR/$log$DEST_SUFFIX"
    fi
done