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2. 学习Perl
3. getgrgid

getgrgid

描述 (Description)

此功能按组ID查找组文件条目。 在列表上下文中返回以下内容 -

（$ name，$ passwd，$ gid，$ members）

$ members标量包含一个以空格分隔的登录名列表，这些登录名是该组的成员。 返回标量上下文中的组名。 有关检索整个组文件的更有效方法，请参阅getgrent。 在Windows下，请考虑使用Win32API :: Net模块。

语法 (Syntax)

以下是此函数的简单语法 -

getgrgid GID

返回值 (Return Value)

此函数返回在scalr上下文中，它返回组名称和列表上下文（名称，密码，组ID和成员列表）。

例子 (Example)

以下是显示其基本用法的示例代码 -

#!/usr/bin/perl
while( ($name,$passwd,$gid,$members) = getgrent() ) {
   ($name,$passwd,$gid,$members) = getgrgid $gid;
   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  = 
Name  = bin
Password  = x
GID  = 1
Members  = 
Name  = daemon
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  = apache
Password  = x
GID  = 48
Members  = 
Name  = rexx
Password  = x
GID  = 1001
Members  = 
Name  = objc
Password  = x
GID  = 1002
Members  =