New_deadlock() {new_line_tile=$(grep -n "LATEST DETECTED DEADLOCK" $1 | cut -d ':' -f 1)new_line_time=$(echo "$new_line_tile + 2" | bc)last_dect_time="$(head -n $new_line_time $1 | tail -n 1) ###截取死锁发生的时间戳[ -e $2 ] || cp $1 $2 #拿这次输出信息，和上次输出信息对比；如果是第一次检测，将这次输出信息cp作为上次输出信息old_line_tile=$(grep -n "LATEST DETECTED DEADLOCK" $2 | cut -d ':' -f 1)if [ -z $old_line_tile ];thenecho 1mv $1  $2  ##判断上次输出是否为死锁，不是的话，直接返回1 表明最近一次是新的死锁。并将 此次输出信息重命名exit 1else      ##否则对比两次的时间戳old_line_time=$(echo "$old_line_tile + 2" | bc) old_last_dect_time="$(head -n $old_line_time  $2 | tail -n 1)"mv $1  $2 #输出信息为下一次检测做准备if [ "$last_dect_time" = "$old_last_dect_time" ];thenecho 0elsecp $1 /tmp/$1_detail #已判定为死锁，需要保留作案信息echo 1fifi
}
deadlock_check() {case $1 in1)$MYSQL_BIN -u $user -p$password  -S $SOC1 -e "show engine innodb status\G" > /tmp/innodb_status_1_$dthmhave_dead_lock=$(grep -c  "LATEST DETECTED DEADLOCK" /tmp/innodb_status_1_$dthm)#判断这次检测是否包含死锁信息，包含的话 让 New_dead_lock 做死锁对比否则 返回0if [ $have_dead_lock -gt 0 ];thenNew_deadlock /tmp/innodb_status_1_$dthm /tmp/innodb_status_1_$dtelseecho 0fi;;2)$MYSQL_BIN -u $user -p$password  -S $SOC2 -e "show engine innodb status\G" > /tmp/innodb_status_2_$dthmhave_dead_lock=$(grep -c  "LATEST DETECTED DEADLOCK" /tmp/innodb_status_2_$dthm)if [ $have_dead_lock -gt 0 ];thenNew_deadlock /tmp/innodb_status_2_$dthm /tmp/innodb_status_2_$dtelseecho 0fi;;3)$MYSQL_BIN -u $user -p$password  -S $SOC3 -e "show engine innodb status\G" > /tmp/innodb_status_3_$dthmhave_dead_lock=$(grep -c  "LATEST DETECTED DEADLOCK" /tmp/innodb_status_3_$dthm)if [ $have_dead_lock -gt 0 ];thenNew_deadlock  /tmp/innodb_status_3_$dthm /tmp/innodb_status_3_$dtelseecho 0fi;;4)$MYSQL_BIN -u $user -p$password  -S $SOC4 -e "show engine innodb status\G" > /tmp/innodb_status_4_$dthmhave_dead_lock=$(grep -c  "LATEST DETECTED DEADLOCK" /tmp/innodb_status_4_$dthm)if [ $have_dead_lock -gt 0 ];thenNew_deadlock /tmp/innodb_status_4_$dthm /tmp/innodb_status_4_$dtelseecho 0fi;;*)echo $ERRORexit 1;;esac
}
case  $1中的变量是针对不同机器上多个实例的情况，传送socket参数