Perl，在 x 秒后使脚本超时? [英] Perl, make script timeout after x number of seconds?

问题描述

我一直在搜索这个问题，但令人惊讶的是很难得到一个直接的答案(因为 php 似乎有更多关于这个主题的信息).我需要让我的 perl 脚本在指定的数字后死亡秒，因为现在它们运行时间太长并阻塞了我的系统，我该如何做到让整个脚本在指定的秒数后停止?

I have been searching on this but it is surprisingly hard to come by a straight answer to this (as php has a lot more info on this topic it seems).. I need to make my perl script die after a specified number of seconds because, as it is now, they are running too long and clogging up my system, how can I make it so the entire script just dies after a specified number of seconds?

我知道终止脚本的外部解决方案，但我想从 perl 脚本本身中完成.

I know about external solutions to kill the script but I would like to do it from within the perl script itself.

谢谢

推荐答案

perldoc -f alarm:

[sinan@kas ~]$ cat t.pl
#!/usr/bin/perl

use strict; use warnings;

use Try::Tiny;

try {
        local $SIG{ALRM} = sub { die "alarm\n" };
        alarm 5;
        main();
        alarm 0;
}
catch {
        die $_ unless $_ eq "alarm\n";
        print "timed out\n";
};

print "done\n";

sub main {
        sleep 20;
}

输出:

[sinan@kas ~]$ time perl t.pl
timed out
done

real    0m5.029s
user    0m0.027s
sys     0m0.000s

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