遍历proc目录下的进程目录

#!/bin/bash
# 遍历/proc目录各进程的内存使用情况
set -u
for pidDir in $(ls /proc/); do
    if [[ ! -d "/proc/${pidDir}" ]]; then
        echo "pass /proc/${pidDir}"
        continue
    fi
    if [[ ! -f "/proc/${pidDir}/statm" ]]; then
        echo "pass /proc/${pidDir}"
        continue
    fi
    vmrss=$(cat "/proc/${pidDir}/statm" | awk '{print $2}')
    echo "${pidDir},${vmrss}" >> /home/scripts/vmrss_stat.log
done