#!/bin/bash

#В скрипте проверяется наличие контрол-файла на шаре, если он найдет - то все ок и можно вызывать скрипт копирования. Если контролфайл не найден-
#то проверяется смонтирована ли шара и если нет, то выполняется попытка монтирование и повторного поиска контролфайла. Если все ок - то вызывается скрипт.

CONTROLFILE=/mnt/smb/controlfile
LOGS=/root/nas/logs/
STORAGE=/storage
echo "From: [email protected]" > $LOGS/mailfile.txt
echo "To: [email protected]" >> $LOGS/mailfile.txt
echo "Subject: SMB check_log" >> $LOGS/mailfile.txt
echo "" >> $LOGS/mailfile.txt

if [[ -f $CONTROLFILE ]];
then
        echo "SMB Share seems UP: bypassing control to copy script" > $LOGS/worklog.txt
        cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
        # Here will be main script

else
        echo "CONTROFILE not found, checking if remote share is mounted..." > $LOGS/worklog.txt
        SMBMOUNTSTATUS=`systemctl status mnt-smb.mount | grep Active: | cut -d' ' -f5`
        if [[ $SMBMOUNTSTATUS == active ]];
        then
                echo "SMB Share is mounted, but CONTROLFILE not found. Something wrong could happen, check it manually" >> $LOGS/worklog.txt
                cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
                exit 1
        elif [[ $SMBMOUNTSTATUS == inactive ]];
        then
                echo "SMB share unmounted, trying to remount..." >> $LOGS/worklog.txt
                systemctl start mnt-smb.mount
                SMBMOUNTSTATUS=`systemctl status mnt-smb.mount | grep Active: | cut -d' ' -f5`
                if [[ $SMBMOUNTSTATUS == active ]];
                then
                        echo "SMB Share seems UP after remount: checking controlfile existing.." >> $LOGS/worklog.txt
                        if [[ -f $CONTROLFILE ]];
                        then
                                echo "SMB Share is UP after remount and controfile exists, bypassing shell to copy script" >> $LOGS/worklog.txt
                                cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
                                # From this line you should call copy script
                        else
                                echo "SMB Share is mounted after remount, but CONTROLFILE not found. Something wrong could happen, check it manually" >> $LOGS/worklog.txt
                                cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
                                exit 1
                        fi
                elif [[ $SMBMOUNTSTATUS == inactive ]];
                then
                        echo "Cannon mount SMB Share, check spr1-backup01 share availability" >> $LOGS/worklog.txt
                        cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
                         else
                        echo "Cannot get mount status. Check it manually" >> $LOGS/worklog.txt
                        cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
                fi
        fi
fi