Perl getgrent 函数 - 菜鸟教程

描述

getgrent 此函数遍历/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，请考虑使用Win32API::Net模块。

句法

以下是此函数的简单语法-


getgrent

返回值

此函数在缩放器上下文和列表上下文（名称，密码，组ID和成员列表）中返回组名。

示例

以下是显示其基本用法的示例代码-

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

尝试一下

执行结果：


Name = root
Password = x
GID = 0
Members = 
Name = daemon
Password = x
GID = 1
Members = 
Name = bin
Password = x
GID = 2
Members = 
Name = sys
Password = x
GID = 3
Members = 
Name = adm
Password = x
GID = 4
Members = 
Name = tty
Password = x
GID = 5
Members = 
Name = disk
Password = x
GID = 6
Members = 
Name = lp
Password = x
GID = 7
Members = 
Name = mail
Password = x
GID = 8
Members = 
Name = news
Password = x
GID = 9
Members = 
Name = uucp
Password = x
GID = 10
Members = 
Name = man
Password = x
GID = 12
Members = 
Name = proxy
Password = x
GID = 13
Members = 
Name = kmem
Password = x
GID = 15
Members = 
Name = dialout
Password = x
GID = 20
Members = 
Name = fax
Password = x
GID = 21
Members = 
Name = voice
Password = x
GID = 22
Members = 
Name = cdrom
Password = x
GID = 24
Members = 
Name = floppy
Password = x
GID = 25
Members = 
Name = tape
Password = x
GID = 26
Members = 
Name = sudo
Password = x
GID = 27
Members = 
Name = audio
Password = x
GID = 29
Members = 
Name = dip
Password = x
GID = 30
Members = 
Name = www-data
Password = x
GID = 33
Members = 
Name = backup
Password = x
GID = 34
Members = 
Name = operator
Password = x
GID = 37
Members = 
Name = list
Password = x
GID = 38
Members = 
Name = irc
Password = x
GID = 39
Members = 
Name = src
Password = x
GID = 40
Members = 
Name = gnats
Password = x
GID = 41
Members = 
Name = shadow
Password = x
GID = 42
Members = 
Name = utmp
Password = x
GID = 43
Members = 
Name = video
Password = x
GID = 44
Members = 
Name = sasl
Password = x
GID = 45
Members = 
Name = plugdev
Password = x
GID = 46
Members = 
Name = staff
Password = x
GID = 50
Members = 
Name = games
Password = x
GID = 60
Members = 
Name = users
Password = x
GID = 100
Members = 
Name = nogroup
Password = x
GID = 65534
Members = 
Name = input
Password = x
GID = 101
Members = 
Name = systemd-journal
Password = x
GID = 102
Members = 
Name = systemd-timesync
Password = x
GID = 103
Members = 
Name = systemd-network
Password = x
GID = 104
Members = 
Name = systemd-resolve
Password = x
GID = 105
Members = 
Name = systemd-bus-proxy
Password = x
GID = 106
Members = 
Name = ssh
Password = x
GID = 107
Members =