我指的是Redirect stderr with date to log file from Cron。
基本上,我有以下文件。
root@ubuntu:/home/osaka# ls -l cronlog.sh python_1.py shellscript_2.sh
-rwxr-xr-x 1 root root 153 Oct 19 16:49 cronlog.sh
-rwxr-xr-x 1 root root 694 Oct 19 18:28 python_1.py
-rwxr-xr-x 1 root root 96 Oct 19 18:27 shellscript_2.sh
python_1.py
从其中调用shellscript_2.sh
脚本:
#python_1.py
#!/usr/bin/python
import os, sys, subprocess
def command():
return os.system('/home/osaka/shellscript_2.sh')
print "This is " + sys.argv[0]
command()
这是cronlog.sh
的内容,完全来自于收件人#7145544:
#cronlog.sh
#!/bin/sh
echo "[`date +\%F-\%T`] Start executing $1"
"$@" 2>&1 | sed -e "s/\(.*\)/[`date +\%F-\%T`] \1/"
echo "[`date +\%F-\%T`] End executing $1"
我有cronjob来运行它并重定向到日志文件,但无论我尝试了什么,shellscript_2.sh
的内容都先写入日志而不是python_1.py
。
以下是示例日志输出:
[2012-10-19-18:45:31] Start executing /home/achinnac/osaka/python_1.py
[2012-10-19-18:45:31] This is /home/achinnac/osaka/shellscript_2.sh
[2012-10-19-18:45:31] This is /home/achinnac/osaka/python_1.py
[2012-10-19-18:45:31] End executing /home/achinnac/osaka/python_1.py
请注意,在此行右侧。
答案 0 :(得分:2)
Python缓冲写入stdout
和stderr
,并在退出时刷新缓冲区。你需要强制刷新以便在早些时候从python中看到你的消息:
import sys
print "This is " + sys.argv[0]
sys.stdout.flush()