bash - 在 Bash 中将 Matlab (Linux) 作为 Cron 作业运行的输出在电子邮件中包含许多“>>”

Question

我在 Linux（RedHat Enterprise Linux RHEL 7.6，64 位）上运行 Matlab 脚本作为 cron 作业。我不是那台机器的管理员，因此，我用它crontab -e来安排工作。Matlab的安装版本是2018b。我在执行时收到的电子邮件包括>>开头和结尾的几封邮件，我觉得这有点烦人。

这里是电子邮件的示例：

MATLAB is selecting SOFTWARE OPENGL rendering.

                            < M A T L A B (R) >
                  Copyright 1984-2018 The MathWorks, Inc.
                   R2018b (9.5.0.944444) 64-bit (glnxa64)
                              August 28, 2018

 
To get started, type doc.
For product information, visit www.mathworks.com.
 
>> >> >> >> 
Matlab started: 2020-07-31 21:50:26.
>> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> 
Going to update from 2015-01-01 00:00:00 UTC to 2015-12-31 23:00:00 UTC. 

[...]

>> Matlab closes: 2020-07-31 23:26:41. 
>> 

Matlab 脚本开头的相应行如下所示：

close all
clearvars
% profile on % to check performance
fprintf('\nMatlab started: %s.\n', char(datetime()))

%% Database user parameters
% connects always to the soecified database on "localhost"
DB_conn_name = 'abc';
DB_username = 'def';
DB_password = 'ghi';

% Add path and subfolders
if isunix
    addpath(genpath('/project/abc'));
elseif ispc
    addpath(genpath('C:\Branches\abc'));
end

% Change working folder
if isunix
    cd /project/abc
elseif ispc
    cd C:\Branches\abc
end

% Add database driver to path
javaaddpath JDBC_driver/mysql-connector-java.jar % Forward slashes within Matlab work even on Windows

% Set default datetime format
datetime.setDefaultFormats('default','yyyy-MM-dd HH:mm:ss')


%% Begin and end of update period
% now_UTC = datetime('now','TimeZone','UTC');
% time_2 = datetime(now_UTC.Year, now_UTC.Month, now_UTC.Day-1, 22, 0, 0); % Set the end time not too late, otherwise, some data might not yet be available for some areas leading to ugly "dips" in Power BI.

% During each update, we update e.g. the past 30 days
% datetime_month_delay = time_1 - days(30);

% Override automatic dates obtained below, for testing purposes
% time_1 = datetime(2020,1,1,0,0,0);
% time_2 = datetime(2020,2,1,23,0,0);

% Updating several years, one at a time
for iYear = 2015:2019
    time_1 = datetime(iYear,1,1,0,0,0);
    time_2 = datetime(iYear,12,31,23,0,0);

    fprintf(['\nGoing to update from ',char(time_1),' UTC to ',char(time_2),' UTC. \n'])

[...]

看起来for循环外的每一行都会产生一个空行，因此>>在输出中会出现这样的提示。最后也可见（此处不包括）。

crontab -e如下所示：

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=<my email address>
HOME=/project/abc
HTTP_PROXY=<proxy address>:8086
HTTPS_PROXY=<proxy address>:8086

# Run script regularly: minute hour day month dayofweek command
# No linebreaks allowed

15 2 * * * ~/script.sh

shell 脚本script.sh如下所示：

#!/bin/bash

/prog/matlab2018b/bin/matlab -nodesktop < ~/git-repos/abc/matlabscript.m

有谁知道我需要改变什么来摆脱这些>>？那很好啊！提前致谢！

标签： bashmatlabcron