将带有日期的 stderr 重定向到 Cron 的日志文件 [英] Redirect stderr with date to log file from Cron

问题描述

bash 脚本从 cron 运行，stderr 重定向到日志文件，这一切正常.代码是:

A bash script is run from cron, stderr is redirected to a logfile, this all works fine. The code is:

*/10 5-22 * * * /opt/scripts/sql_fetch 2>> /opt/scripts/logfile.txt

我想在日志文件的每一行前面加上日期，这不起作用，代码是:

I want to prepend the date to every line in the log file, this does not work, the code is:

*/10 5-22 * * * /opt/scripts/sql_fetch 2>> ( /opt/scripts/predate.sh >> /opt/scripts/logfile.txt )

predate.sh 脚本如下所示:

#!/bin/bash
while read line ; do
    echo "$(date): ${line}"
done

所以第二位代码不起作用，有人可以解释一下吗?谢谢.

So the second bit of code doesn't work, could someone shed some light? Thanks.

推荐答案

我有一个小脚本 cronlog.sh 来执行此操作.脚本代码

I have a small script cronlog.sh to do this. The script code

#!/bin/sh
echo "[`date`] Start executing $1"
$@ 2>&1 | sed -e "s/(.*)/[`date`] 1/"
echo "[`date`] End executing $1"

那你就可以了

cronlog.sh /opt/scripts/sql_fetch >> your_log_file

示例结果

cronlog.sh echo 'hello world!'

[Mon Aug 22 04:46:03 CDT 2011] Start executing echo
[Mon Aug 22 04:46:03 CDT 2011] helloworld!
[Mon Aug 22 04:46:03 CDT 2011] End executing echo

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