#!/bin/bash
#
# Site: https://github.com/AlexeyGogolev/check-bx-db-value
#
mysql="$(which mysql)" #    mysql
php="$(which php)" #    php
declare -A CLParams #    
declare -a CLParams_keys #      
declare -A DBSettings #    
declare -a DBSettings_keys #       
DBSettings_keys=(DBLogin DBPassword DBName)
CLParams_keys=(path_to_bxdb_config single_num_value_query max_num_value)
param_num=0 #   
#   
for key in "${CLParams_keys[@]}" ; do 
    ((param_num++))                 
    CLParams[$key]=${!param_num}    # ${!param_num}  - $1 $2... 
done
#    ,  
if  [ -z "${CLParams[${CLParams_keys[$param_num-1]}]}" ] ; then
    printf "Script compares result returned by <${CLParams_keys[1]}> to given <${CLParams_keys[2]}>.\nIf the result more than the given value, then exit with code 1, else exit 0.\n"
    printf "Usage: \n\t$(basename ${BASH_SOURCE[0]}) " ; for key in "${CLParams_keys[@]}" ; do printf "<$key> "; done ; printf "\n"
    printf "Example: \n\t$(basename ${BASH_SOURCE[0]}) \"/www/ab.cd/bitrix/php_interface/dbconn.php\" \"select count(id) from b_event where SUCCESS_EXEC<>'Y'\" 5\n" 
    exit 10
fi
#        
if ! [ -s "${CLParams[path_to_bxdb_config]}" ] ; then 
    printf "File ${CLParams[path_to_bxdb_config]} doesn't exist or empty.\n"
    exit 20
fi
#          " "
echo ${CLParams[single_num_value_query]} | grep -i -q -E 'delete|update|insert|drop' && printf "query \n${CLParams[single_num_value_query]}\nisn't allowed\n" && exit 30
#     php-config -n --  php.ini , -r --     <?...?>
for key in "${DBSettings_keys[@]}" ; do 
    DBSettings[$key]="$($php -n -r 'include("'${CLParams[path_to_bxdb_config]}'"); print $'$key';')"
done
#   mysql    (  )
export MYSQL_PWD=${DBSettings[DBPassword]}
#     : -N --    ; -B - (batch) -   ""  ; -e  
num_value=`${mysql} -u ${DBSettings[DBLogin]} -N -B -e "use ${DBSettings[DBName]}; ${CLParams[single_num_value_query]}"`
#  
echo "Result of the query (from DB ${DBSettings[DBName]}): ${num_value}, ${CLParams_keys[2]}: ${CLParams[max_num_value]}"
#  
if [ $num_value -gt ${CLParams[max_num_value]} ]; then
    exit 1
fi

#!/bin/bash
check_bx_db_value.sh \
«/www/ab.cd/bitrix/php_interface/dbconn.php» \
«select count(id) from b_event where SUCCESS_EXEC<>'Y'» \
2

$ ./ab_cd_unsent_check.sh && echo "success" || echo "failure"

Result of the query (from DB ab_cd): 0, max_num_value: 2
success

$ ./ab_cd_unsent_check.sh && echo "success" || echo "failure"

Result of the query (from DB ab_cd): 4, max_num_value: 2
failure

check program ab_cd_unsent_check with path /home/bitrix/scripts/ab_cd_unsent_check.sh
every 2 cycles
    group mail
if status != 0 then alert