unix中字符串到整数的转换

Question

我想打印进程id的内存。但是，我在if块中遇到错误，因为它无法检查字符串，因为需要整数。

printf "%-10s%-15s%-15s%s\n" "PID" "OWNER" "MEMORY" "COMMAND"


function sysmon_main(){
RAWIN=$(ps -o  pid,user,%mem,command ax |grep -v PID |awk '/[0-9]*/{print $1 ":" $2 ":" $4}')


for i in $RAWIN
do
     PID=$(echo $i | cut -d: -f1)
     OWNER=$(echo $i| cut -d: -f2)
     COMMAND=$(echo $i| cut -d: -f3)
     MEMORY=$(pmap $PID | tail -n 1| awk '/[0-9]K/{print $2}')

if [ "$MEMORY" -gt 0 ];then

     printf "%-10s%-15s%-15s%s\n" "$PID" "$OWNER" "$MEMORY" "$COMMAND"
fi
done
}

sysmon_main | sort -bnr -k3

我得到了下面的错误

./sysmon: line 17: [: 0K: integer expression expected
./sysmon: line 17: [: 126704K: integer expression expected
./sysmon: line 17: [: 14216K: integer expression expected
./sysmon: line 17: [: 48187132K: integer expression expected

Answer 1

您可以使用以下脚本：

while read -r pid owner m cmd; do
   if [[ $pid =~ ^[0-9]+$ && $cmd != "ps -o"* ]]; then
      mem="$(pmap $pid | awk 'END {print $NF+0}')"
      ((mem > 0)) && printf "%-10s%-15s%-15s%s\n" "$pid" "$owner" "$mem" "$cmd"
   fi
done < <(ps -o  pid,user,%mem,command ax)