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Perl getgrent用法及代码示例


描述

此函数迭代 /etc/group 文件中的条目。在列表上下文中返回以下内容 -

($name, $passwd, $gid, $members)

$members 标量包含作为组成员的登录名的空格分隔列表。仅在标量上下文中使用时才返回组名。在 Windows 下,考虑使用 Win32API::Net 模块。

用法

以下是此函数的简单语法 -

getgrent

返回值

此函数返回标量上下文和列表上下文中的组名称(名称、密码、组 ID 和成员列表。

示例

以下是显示其基本用法的示例代码 -

#!/usr/bin/perl

while( ($name,$passwd,$gid,$members) = getgrent() ) {
   print "Name  = $name\n";
   print "Password  = $passwd\n";
   print "GID  = $gid\n";
   print "Members  = $members\n";
}

执行上述代码时,会产生以下结果 -

Name  = root
Password  = x
GID  = 0
Members  = root
Name  = bin
Password  = x
GID  = 1
Members  = root bin daemon
Name  = daemon
Password  = x
GID  = 2
Members  = root bin daemon
Name  = sys
Password  = x
GID  = 3
Members  = root bin adm
Name  = adm
Password  = x
GID  = 4
Members  = root adm daemon
Name  = tty
Password  = x
GID  = 5
Members  = 
.
.
.
Name  = fuse
Password  = x
GID  = 496
Members  = 
Name  = kvm
Password  = x
GID  = 36
Members  = qemu
Name  = qemu
Password  = x
GID  = 107
Members  = 
Name  = com
Password  = x
GID  = 501
Members  = 
Name  = webgrp
Password  = x
GID  = 502
Members  = com
Name  = railo
Password  = x
GID  = 495
Members  = 

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