fork后,如何让父进程在子进程后结束?

打靶归来

UID: 14692
帖子: 17
积分: 39
在线时间: 10 分钟

1^# 打靶归来发表于 2008-04-17 09:03

fork后,如何让父进程在子进程后结束?

fork后,如何让父进程在子进程后结束?
fork 了10个子进程,想在父进程中收割10个子进程后退出
下面的代码怎么父进程在子进程前就结束了.

[Copy to clipboard] [ - ]

CODE:

#!/usr/bin/perl
use strict;
use POSIX qw(WNOHANG setsid);
my $maxchild=10;
my @child_pid;
foreach my $item (1..$maxchild) {
      defined (my $child=fork()) or die "Can't fork:$!";
      if ($child==0){
            sleep 1;
            push @child_pid,$$;
      }
}
foreach(@child_pid){
      print "Wait:$_\n\n";
      waitpid($_,0);
}

khandielas

UID: 1557
帖子: 117
积分: 269
在线时间: 19 小时

2^# khandielas 发表于 2008-04-17 11:00

You need to check to make sure child_pid is done, and probably you want to check how pid is completed, good or bad?

something like this:

$exitpid = wait;
if ($? != 0) {
# pid exits poorly, done something
}
else {
$maxchild --;
}

if ($maxchild == 0) {
print "all done\n";
}

apile

UID: 42255
帖子: 66
积分: 151
在线时间: 6 小时

3^# apile 发表于 2008-04-17 12:42

$SIG{CHLD}
please catch this signal in your parent process,
if all childs done it's job , the parent can die..