Linux service无法使用系统环境变量的问题及解决

export PATH=/usr/local/mysql/bin:$PATH

[root@localhost init.d]# echo $PATH
/usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

[root@localhost init.d]# vi /etc/init.d/mysqlmul
#!/bin/bash

#chkconfig: - 75 15
#description: test

[root@localhost init.d]#chmod +x /etc/init.d/mysqlmul
[root@localhost init.d]#chkconfig --add mysqlmul

[root@localhost init.d]# service mysqlmul start
/sbin:/usr/sbin:/bin:/usr/bin

// 测试代码

#include <stdio.h>
#include <iostream>

using namespace std;

int main(int argc, const char* argv[])
{
    int size = 0;
    // 解析传入参数（argc和argv），代码略
    // ...
    
	cout << size <<endl;
    
	while(1);
	return 0;
}

[Unit]
Description=LogTest
After=network.target 

[Service]
Type=simple
EnvironmentFile=-/etc/sysconfig/LogTest
ExecStart=/usr/local/MyTest/LogTest -s ${TESTSIZE}
ExecStop=/bin/kill -s QUIT $MAINPID
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=LogTest

[Install]
WantedBy=multi-user.target   

# 环境变量文件,可根据需要新增
TESTSIZE=10

# 文件拷贝
cp LogTest.service /usr/lib/systemd/system

# 文件加载
systemctl daemon-reload

# 程序启动
systemctl start LogTest

# 查看进程是否启动成功
ps -aux | grep LogTest

# 进入日志所在目录
cd /var/log

# 查看LogTest.log
cat LogTest.log